Page 1 Service Guide 8590 Series Analyzers Assembly-Level Repair Manufacturing Part Number: 08590-90316 Supersedes: 08590-90300 Printed in USA April 2001 © Copyright 1992-1998, 2001 Agilent Technologies, Inc.
Page 2 The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and ﬁtness for a particular purpose. Agilent Technologies...
Page 3 Certiﬁcation Agilent Technologies certiﬁes that this product met its published speciﬁcations at the time of shipment from the factory. Agilent Technologies further certiﬁes that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute's calibration facility, and to the calibration facilities of other International Standards Organization members.
Page 4 LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY. Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact your nearest Agilent Technologies Sales and Service Ofﬁce.
Page 5 8590 E-Series and L-Series Spectrum Analyzer Documentation Description The following guides are shipped with your 8590 E-Series or L-Series spectrum analyzer. 8590 E-Series Spectrum Analyzers and 8591C Cable TV Analyzer Calibration Guide • Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations.
Page 6 8591C Cable TV Analyzer Documentation Description The following guides are shipped with your cable TV analyzer. 8590 E-Series Spectrum Analyzers and 8591C Cable TV Analyzer Calibration Guide • Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations.
Page 7 8594Q QAM Analyzer Documentation Description The following guides are shipped with your QAM analyzer. 8590 Series Analyzers Calibration Guide • Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations. 8594Q QAM Analyzer User's Guides Option 190/195 DVB-C/Data Measurements •...
Page 8 Option 915: Service Guide and Component-Level Information Describes troubleshooting and repair of the analyzer. Option 915 consists of two manuals: 8590 Series Analyzers Assembly-Level Repair Service Guide • Describes adjustment and assembly level repair of the analyzer. 8590 Series Analyzers Component-Level Repair Service Guide •...
Page 9: Table Of Contents
1. Introduction The 8590 Series Analyzers Assembly-Level Repair Service Guide ..... 14 Service Guide Organization ........... 15 Analyzer Description .
Page 10 Contents 2a. Making Adjustments: If 3335A Source Not Available Before You Start ............178 6a.
Page 11 Check the Basics ............351 Calling Agilent Technologies Sales and Service Ofﬁces ......352 Returning Your Analyzer for Service .
Page 12 Contents 14. Analyzer Messages Interpreting Analyzer Messages ..........614 15.
Page 13: Introduction
Introduction The 8590 Series Analyzers Assembly-Level Repair Service Guide provides the information needed to adjust and repair the 8590 E-Series and L-Series spectrum analyzers, the 8591C cable TV analyzer and 8594Q QAM analyzer to the assembly level.
Page 14: The 8590 Series Analyzers Assembly-Level Repair Service Guide
Introduction The 8590 Series Analyzers Assembly-Level Repair Service Guide The 8590 Series Analyzers Assembly-Level Repair Service Guide The 8590 Series Analyzers Component-Level Repair Service Guide provides component-level information for the repair of individual analyzer assemblies. The binder contains Component-Level Information Packets (CLIPs) for selected assemblies. Each CLIP contains component-level schematics, a component parts list, and illustrations for component location by reference designator.
Page 15: Service Guide Organization
• Chapter 7, “Replacing Major Assemblies,” contains instructions for the removal and replacement of most major assemblies. • Chapter 8, “Contacting Agilent Technologies,” contains information on how to contact Agilent Technologies and return the analyzer for repair. • Chapter 9, “Assembly Descriptions and Block Diagrams,” contains information and block diagrams describing analyzer operation and individual assemblies.
Page 16: Analyzer Description
Introduction Analyzer Description • Chapter 10, “Analyzer Options and Block Diagrams,” contains information on the available analyzer options. • Chapter 11, “Major Assembly and Cable Locations,” contains ﬁgures identifying all major assemblies and cables. • Chapter 12, “Replaceable Parts,” contains information needed to order assemblies and component-level information for the analyzer.
Page 17 Introduction Analyzer Description Table 1-1 8590 E-Series and L-Series Spectrum Analyzer, 8591C Cable TV Analyzer and 8594Q QAM Analyzer Frequency Ranges Analyzer Model Frequency Range 8590L 9 kHz to 1.8 GHz 8591E 9 kHz to 1.8 GHz 8591C 1 MHz to 1.8 GHz 8592L 9 kHz to 22.0 GHz 8592L (Option 026)
Page 18: Firmware Revision Date
(IB: nn) or (RS232: nnnn) COPYRIGHT 1986 rev yy.mm.dd Whenever you contact Agilent Technologies about your analyzer, be sure to provide the ﬁrmware date along with the complete serial number and option designation. This will ensure that you obtain accurate service information.
Page 19: Reliability Considerations
The 11947A Transient Limiter is an analyzer accessory that protects the input circuitry from transients and accidental overloads. Contact your local Agilent Technologies sales or service ofﬁce for more information about the 11947A. Transients are often produced during electromagnetic interference CAUTION (EMI) conducted emissions testing.
Page 20 Introduction Reliability Considerations Table 1-2 8590L and 8591E Spectrum Analyzer and 8591C Cable TV Analyzer &Maximum Safe Input Level INPUT 50Ω (Input INPUT 75Ω (Input Attenuation ≥10 dB) Attenuation ≥10 dB) Average Continuous Power +30 dBm (1 W) +75 dBmV (0.4 W) Peak Pulse Power +30 dBm (1 W) +75 dBmV (0.4 W)
Page 21: Adjustment Procedures
Introduction Adjustment Procedures Adjustment Procedures The following table lists the analyzer adjustments in Chapter 2 and Chapter 2a and the models that they apply to. Select the model of the analyzer being adjusted and note the adjustments marked in the analyzer model column to determine which adjustments should be performed.
Page 22 Introduction Adjustment Procedures Table 1-6 8590 E-Series and L-Series Spectrum Analyzer, 8591C Cable TV and 8594Q QAM Analyzer Adjustment Procedures Adjustment for Spectrum Analyzer Model: Adjustment Procedure Name 15a. Frequency Response of the 8590L, • • • 8591C, and 8591E Frequency Response of the 8592L, •...
Page 23: Safety
Introduction Safety Safety Familiarize yourself with the safety symbols marked on the analyzer, and read the general safety instructions and the symbol deﬁnitions given in Chapter 16 , “Safety and Regulatory Information,” before you begin the procedures in this chapter. Test Equipment You Will Need Refer to Chapter 1 of the calibration guide for your instrument for a list of recommended equipment for the analyzer adjustments.
Page 24: If There Are Abnormal Indications During Adjustment
Introduction If There Are Abnormal Indications During Adjustment If There Are Abnormal Indications During Adjustment If the indications received during an adjustment do not agree with the normal conditions given in the adjustment procedures, a fault exists in your analyzer. The fault should be repaired before proceeding with any further adjustments.
Page 25: If You Replace Or Repair An Assembly
Introduction If You Replace or Repair an Assembly If You Replace or Repair an Assembly If one or more analyzer assemblies has been replaced or repaired, related adjustment procedures should be done prior to verifying operation. Refer to Table 1-7 to determine which adjustment to perform after replacing or repairing an assembly.
Page 26 Introduction If You Replace or Repair an Assembly Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies Replaced or Repaired Related Adjustments Related Performance Veriﬁcation Tests Assembly and Adjustment Routines A3A6 Dual Mixer or CAL FREQ Noise Sidebands Low Band Mixer CAL AMPTD System Related Sidebands CAL YTF...
Page 27 Introduction If You Replace or Repair an Assembly Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies Replaced or Repaired Related Adjustments Related Performance Veriﬁcation Tests Assembly and Adjustment Routines A3A14 LO Distribution First LO Frequency Readout and Marker Count Accy Ampliﬁer (LODA) Distribution Ampliﬁer Noise Sidebands...
Page 28 Introduction If You Replace or Repair an Assembly Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies Replaced or Repaired Related Adjustments Related Performance Veriﬁcation Tests Assembly and Adjustment Routines A7 Analog Interface CAL FREQ Frequency Readout and Marker Count Accy CAL AMPTD Noise Sidebands CAL YTF (8592L,...
Page 29 Introduction If You Replace or Repair an Assembly Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies Replaced or Repaired Related Adjustments Related Performance Veriﬁcation Tests Assembly and Adjustment Routines A11 Bandwidth Crystal and IC Resolution Bandwidth Accuracy Bandwidth Filter CAL Absolute Amplitude Calibration and FREQ Bandwidth Switching Uncertainties...
Page 30 Introduction If You Replace or Repair an Assembly Chapter 1...
Page 31: Making Adjustments
Making Adjustments The procedures in this chapter adjust the analyzer electrical performance to the speciﬁcations described in Chapter 2 of the calibration guide for your instrument. Most adjustments require access to the interior of the analyzer. If a 3335A source is not available, use the alternative adjustments with the same number found in Chapter 2a.
Page 32: Before You Start
Making Adjustments Before You Start Before You Start There are three things you should do before starting an adjustment procedure. • Check that you are familiar with the safety symbols marked on the analyzer, and read the general safety considerations and the symbol deﬁnitions given in the front of this service guide.
Page 33: 1A. Display (With Four Access Holes In Top Of Shield)
Making Adjustments 1a. Display (with four access holes in top of shield) 1a. Display (with four access holes in top of shield) This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers There are two different types of displays.
Page 34 Making Adjustments 1a. Display (with four access holes in top of shield) Fine Focus 1. Adjust the front panel INTENSITY control for a comfortable viewing intensity. 2. Use an adjustment tool to access the ﬁne focus adjustment. See Figure 2-1. Adjust as necessary for a focused display. If one of the end-stops of the ﬁne focus adjustment is reached, proceed with the “Coarse Focus Adjustment”...
Page 35 Making Adjustments 1a. Display (with four access holes in top of shield) Coarse Focus The Coarse Focus adjustment point is located at the rear of the display assembly, therefore, it is required to place the display in a service position to perform this procedure. 1.
Page 36: 1B. Display (With Eight Access Holes In Top Of Shield)
Making Adjustments 1b. Display (with eight access holes in top of shield) 1b. Display (with eight access holes in top of shield) This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers All display adjustments are described in this adjustment procedure.
Page 37 Making Adjustments 1b. Display (with eight access holes in top of shield) Procedures Before Performing any Adjustment Before performing any display adjustment, press the following analyzer keys. CONFIG More 1 of 3 More 2 of 3 DEFAULT SYNC , More 1 of 4, More 2 of 4 DEFAULT CAL DATA Focus The Focus potentiometer is located on the left side of the instrument...
Page 38 Making Adjustments 1b. Display (with eight access holes in top of shield) Centering Perform this adjustment only if the displayed image is not horizontally centered on the display. The Centering potentiometer is accessible through the top of the display's cover. The instrument cover must be removed for access to the display's cover.
Page 39 Making Adjustments 1b. Display (with eight access holes in top of shield) Horizontal Hold Perform this adjustment only if the displayed image is rolling horizontally across the display. The Horizontal Hold potentiometer is accessible through the top of the display's cover. The instrument cover must be removed for access to the display's cover.
Page 40 Making Adjustments 1b. Display (with eight access holes in top of shield) 5. Press (PAL). SYNC NRM PAL 6. Adjust the Vertical Hold potentiometer so that the display image is not rolling vertically. 7. Repeat step 1 step 5 until no adjustment is necessary for either the NTSC or the PAL mode.
Page 41 Making Adjustments 1b. Display (with eight access holes in top of shield) Brightness and Contrast Perform these adjustments only if the brightness and contrast of the display is not correct. The Brightness and Contrast potentiometers are accessible through the top of the display's cover. The instrument cover must be removed for access to the display's cover.
Page 42: Sampler Match
Making Adjustments 2. Sampler Match 2. Sampler Match This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The match between the sampling oscillator and the sampler is optimized by ﬁrst setting the sampling-oscillator frequency for midrange, then adjusting the sampler-match adjustment for maximum dc volts as read on a digital multimeter.
Page 43 Making Adjustments 2. Sampler Match Figure 2-5 A25 Counter Lock Assembly Test Points Chapter 2...
Page 44: 3. 10 Mhz Reference
Making Adjustments 3. 10 MHz Reference 3. 10 MHz Reference This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers with Option 704 8594Q QAM analyzers with Option 704 The internal 10 MHz time base is adjusted for frequency accuracy. This procedure does not adjust for long-term drift or aging rate.
Page 45 Making Adjustments 3. 10 MHz Reference Procedure Note that to properly adjust the time base, a frequency standard with a better time base accuracy than that of the analyzer is required. 1. Connect the equipment as shown in Figure 2-6. 2.
Page 46: 4. 10 Mhz Precision Frequency Reference
Making Adjustments 4. 10 MHz Precision Frequency Reference 4. 10 MHz Precision Frequency Reference This adjustment applies to: All 8590 E-Series spectrum analyzers, Option 004 8591C cable TV analyzers 8594Q QAM analyzers Replacement oscillators are factory adjusted after a complete warmup and after the speciﬁed aging rate has been achieved.
Page 47 Making Adjustments 4. 10 MHz Precision Frequency Reference Procedure 1. Place the analyzer on its side as shown in Figure 2-7 and set the LINE switch of the analyzer to ON. 2. Allow the analyzer to remain powered ON and undisturbed for at least 24 hours, so that both the temperature and frequency of the OCXO can stabilize.
Page 48 Making Adjustments 4. 10 MHz Precision Frequency Reference 9. Select a 10 second gate time by pressing the following frequency counter keys. GATE TIME, GATE TIME The frequency counter should now display the difference between the frequency of the INPUT A signal and 10.0 MHz with a resolution of 0.001 Hz (1 MHz).
Page 49: Crystal And Lc Bandwidth Filter
Making Adjustments 5. Crystal and LC Bandwidth Filter 5. Crystal and LC Bandwidth Filter This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The crystal and LC bandwidth ﬁlter circuits are adjusted for symmetry, center frequency, and peak amplitude.
Page 50 Making Adjustments 5. Crystal and LC Bandwidth Filter Crystal Alignment 3. Connect the CAL OUT to the INPUT 50 Ω with the BNC cable. 75 Ω input: Connect the CAL OUT to the INPUT 75 Ω with the 75 Ω BNC cable.
Page 51 Making Adjustments 5. Crystal and LC Bandwidth Filter 5. Press , then use the knob to place the signal at the sixth AMPLITUDE graticule line from the bottom. 6. Press , 30, on the analyzer. Shorting the crystal test points to ground may permanently damage the CAUTION bandwidth board assembly.
Page 52 Making Adjustments 5. Crystal and LC Bandwidth Filter 15.Remove the crystal shorts and press the following analyzer keys. PEAK SEARCH (ON) MKR FCTN, MK TRACK ON OFF , 50, SPAN (OFF) MKR FCTN, MK TRACK ON OFF , 3, PEAK SEARCH, MARKER DELTA , 30, PEAK SEARCH 16.Verify that the MARKER ∆...
Page 53 Making Adjustments 5. Crystal and LC Bandwidth Filter LC Alignment 18.Press the following analyzer keys. , 100, , 5, SPAN 19.Widen all but one of the LC ﬁlter poles by shorting A11TP10 and A11TP11, A11TP12 and A11TP13, and A13TP10 and A13TP11 using the crystal shorts.
Page 54 Making Adjustments 5. Crystal and LC Bandwidth Filter 26.Adjust A13C45 LC CTR for maximum signal at center-screen. 27.Move the short from A11TP10 and A11TP11 to A11TP12 and A11TP13, then adjust A11C23 LC CTR for maximum signal at center-screen. 28.Move the short from A13TP12 and A13TP13 to A11TP10 and A11TP11, then adjust A13C45 LC CTR for maximum signal at center-screen.
Page 55 Making Adjustments 5. Crystal and LC Bandwidth Filter Final LC Centering 36.Press the following analyzer keys. , 30, , 100, SPAN MARKER → CF PEAK SEARCH , 100, 37.Make ﬁnal adjustments by adjusting A11C23, A11C45, A13C23, and A13C45 in succession to peak the amplitude of the marker at center-screen.
Page 56 Making Adjustments 5. Crystal and LC Bandwidth Filter Final BW Amplitude Check 44.Run the “CAL FREQ Adjustment Routine” and the “CAL AMPTD Adjustment Routine.” 45.Remember to press after the completion of the routines CAL STORE to store data in nonvolatile memory. 46.Press the following analyzer keys to verify that the bandwidth amplitude corrections are within speciﬁcations.
Page 57 Making Adjustments 5. Crystal and LC Bandwidth Filter Table 2-1 Bandwidth Amplitude-Correction Map Resolution Bandwidths BW-AMP Correction Numbers not used 0.00 not used 0.00 not used 0.00 not used 0.00 XTAL: 9 kHz 0.00 300 Hz 0.46 1 kHz 0.06 −0.02 3 kHz 10 kHz...
Page 58: Cal Attenuator Error
Making Adjustments 6. Cal Attenuator Error 6. Cal Attenuator Error This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The A12 amplitude control assembly has one 10 dB and two 20 dB nonadjustable ampliﬁers.
Page 59 Making Adjustments 6. Cal Attenuator Error Procedure The accuracy of the amplitude control attenuator is critical to the proper calibration of the instrument; therefore, this procedure must be carefully and accurately performed. 1. Turn the analyzer switch to OFF. Remove the instrument cover LINE assembly.
Page 60 Making Adjustments 6. Cal Attenuator Error 1 dB Step Check 6. To measure the 1 dB step correction, press the following analyzer keys. , 25, FREQUENCY , 10, SPAN 75 Ω input: AMPLITUDE More 1 of 2, AMPTD UNITS −dBm , 18, AMPLITUDE (LIN),...
Page 61 Making Adjustments 6. Cal Attenuator Error 2 dB Check 13.Press the following analyzer keys. −dBm , 16, AMPLITUDE 14.Set the amplitude of the synthesizer/level generator to −17 dBm. 15.Press the following analyzer keys. PEAK SEARCH MARKER DELTA MARKER DELTA (ON) MKR FCTN, MK TRACK ON OFF 16.MKR ∆...
Page 62 Making Adjustments 6. Cal Attenuator Error Entering Attenuator Error Correction Data 22.Press the following analyzer keys. PRESET 75 Ω input: AMPLITUDE More 1 of 2 AMPTD UNITS, dBm , −2001, FREQUENCY More 1 of 4 More 2 of 4 SERVICE CAL SET ATTN ERROR Note that the frequency of −2001 is necessary to access the...
Page 63: Log And Linear Amplifier
Making Adjustments 7. Log and Linear Ampliﬁer 7. Log and Linear Ampliﬁer This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers A 21.4 MHz signal is injected into an IF test board that has been inserted in place of the ﬁrst resolution bandwidth assembly, A11.
Page 64 Making Adjustments 7. Log and Linear Ampliﬁer Procedure 1. Turn the analyzer switch to OFF. Remove the instrument cover LINE assembly. 2. Remove the ﬁrst IF bandwidth ﬁlter assembly, A11. Install the IF test board into the A11 slot. Turn the analyzer switch to ON.
Page 65 Making Adjustments 7. Log and Linear Ampliﬁer Figure 2-11 Log and Linear Ampliﬁer Adjustment Setup Log Fidelity Adjustment 7. Adjust the synthesizer knob for maximum signal amplitude on the display. Adjust the synthesizer amplitude as necessary to keep the signal on the display. 8.
Page 66 Making Adjustments 7. Log and Linear Ampliﬁer Figure 2-12 Log and Linear Ampliﬁer Adjustment Location 12.Set the synthesizer amplitude 60 dB below that recorded in step 8 by ⇓ pressing and then pressing (step-down key) six times. AMPLITUDE Adjust A14R10 OFFSET for the DMM reading of 250 mV ±1 mV. 13.Repeat step 10 and step 11 until no further adjustment is necessary.
Page 67 Making Adjustments 7. Log and Linear Ampliﬁer Table 2-3 Log Fidelity Check Synthesizer Level DMM Reading 1000 mV ±1 mV Reference from step 8 Reference − 10 dB 875 mV ±3 mV Reference − 20 dB 750 mV ±4 mV Reference −...
Page 68: Cal Freq Adjustment Routine
Making Adjustments 8. CAL FREQ Adjustment Routine 8. CAL FREQ Adjustment Routine This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers softkey accesses an internal self-adjustment routine. CAL FREQ The “CAL FREQ Adjustment Routine” adjusts the analyzer to obtain frequency accuracy using CAL OUT signal.
Page 69 Making Adjustments 8. CAL FREQ Adjustment Routine Procedure Interrupting this routine may result in corrupt data being stored in RAM. If this occurs, rerun the adjustment routine. CAL FREQ 1. Connect the CAL OUT to the INPUT 50 Ω with the BNC cable. See Figure 2-13.
Page 70: Cal Amptd Adjustment Routine
Making Adjustments 9. CAL AMPTD Adjustment Routine 9. CAL AMPTD Adjustment Routine This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers softkey accesses an internal self-adjustment routine. CAL AMPTD The following adjustments are automatically performed by CAL AMPTD •...
Page 71 Making Adjustments 9. CAL AMPTD Adjustment Routine Procedure It is recommended to complete the “CAL FREQ Adjustment Routine” prior to performing the “CAL AMPTD Adjustment Routine.” 1. Connect the CAL OUT to the INPUT 50 Ω using a BNC cable. See Figure 2-14.
Page 72: 10. Cal Ytf Adjustment Routine
Making Adjustments 10. CAL YTF Adjustment Routine 10. CAL YTF Adjustment Routine This adjustment applies to: 8592L spectrum analyzers 8593E spectrum analyzers 8595E spectrum analyzers 8596E spectrum analyzers softkey accesses an internal adjustment routine. This CAL YTF routine adjusts the slope and offset of the A3A8 YTF tune voltage for each harmonic mixing band.
Page 73 Making Adjustments 10. CAL YTF Adjustment Routine Procedure 1. Perform the CAL FREQ routine as indicated in the “CAL FREQ Adjustment Routine” in this chapter. 2. Connect the 100 MHz COMB OUT to INPUT 50 Ω using the YTF CAL cable. Refer to Figure 2-15.
Page 74 Making Adjustments 10. CAL YTF Adjustment Routine 1. Press the following keys to activate title mode. PRESET CAL, More 1 of 4 More 2 of 4 SERVICE DIAG DISPLAY CAL DATA 2. Record the displayed “Optimum Bias” DAC values for each frequency band.
Page 75 Making Adjustments 10. CAL YTF Adjustment Routine 7. Press the following keys to allow entry of the default mixer bias DAC value for band 2. DISPLAY CHANGE TITLE CLEAR 8. Enter CALMXRDATA 20,2; as a title entry to set the mixer bias value to 20 for band 2.
Page 76 Making Adjustments 10. CAL YTF Adjustment Routine 14.Press the following keys to store the mixer bias value for band 4 in nonvolatile memory. More 1 of 4 More 2 of 4 SERVICE CAL EXECUTE TITLE 15.Press the following keys to check the default mixer bias DAC values. PRESET CAL, More 1 of 4 More 2 of 4...
Page 77: 11. Cal Mxr Adjustment Routine
Making Adjustments 11. CAL MXR Adjustment Routine 11. CAL MXR Adjustment Routine This adjustment applies to: 8592L spectrum analyzers 8593E spectrum analyzers 8595E spectrum analyzers 8596E spectrum analyzers softkey accesses an internal adjustment routine which CAL MXR optimizes the dc bias for the A3A6 Dual Band Mixer when in high band (2.75 to 22 GHz).
Page 78 Making Adjustments 11. CAL MXR Adjustment Routine Procedure 1. Perform the CAL YTF routine as indicated in the “CAL YTF Adjustment Routine” in this chapter. 2. Connect the 100 MHz COMB OUT to INPUT 50 Ω using the CAL YTF cable (Type N to SMA cable). Refer to Figure 2-16.
Page 79: 12. Second Converter
Making Adjustments 12. Second Converter 12. Second Converter This adjustment applies to: 8590L spectrum analyzers 8591E spectrum analyzers 8591C cable TV analyzers The RF output of the tripler is adjusted by observing an analyzer connected to the 321.4 MHz second converter output, and adjusting the slug-tuned cavity for maximum signal.
Page 80 Making Adjustments 12. Second Converter Procedure Tripler Adjustment 1. Turn the analyzer switch to OFF. Remove the instrument cover LINE assembly. Refer to the “Instrument Cover” removal procedure in Chapter 2. Turn the analyzer switch to ON. LINE 3. Press INSTRUMENT PRESET on the microwave spectrum analyzer and set the controls as follows: CENTER FREQUENCY .......
Page 81 Making Adjustments 12. Second Converter Note that when adjusting with the tuning tool, the signal amplitude will change as the lock nuts are tightened. Optimum signal amplitude should be maintained while tightening these lock nuts. Figure 2-18 Second Converter Adjustment Location Second Converter Bandpass 6.
Page 82 Making Adjustments 12. Second Converter 8. With nothing connected to the analyzer INPUT 50 Ω (Option 001: INPUT 75 Ω), press the following keys. PRESET PEAK SEARCH (ON) MKR FCTN MK TRACK ON OFF , 10, SPAN Wait for AUTO ZOOM message to disappear. 9.
Page 83 Making Adjustments 12. Second Converter Figure 2-20 Second Mixer Match Adjustment Setup 16.Set the microwave spectrum analyzer controls as follows: CENTER FREQUENCY ......321.4 MHz REFERENCE LEVEL ........−40 dBm SPAN .............. 20 MHz dB/DIV ............1 dB/DIV 17.Adjust A5 2ND MIXER MATCH (refer to Figure 2-18) for maximum amplitude as displayed on the microwave spectrum analyzer.
Page 84 Making Adjustments 12. Second Converter ∆ 21.Press and rotate the knob clockwise so that the MARKER MODE, marker delta amplitude reads 0 dB and is on the right-hand side of the response. Read the marker delta frequency; it should be 15 MHz ±2.5 MHz.
Page 85: Third Converter And Second If Bandpass
Making Adjustments 13. Third Converter and Second IF Bandpass 13. Third Converter and Second IF Bandpass This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The 321.4 MHz, second IF bandpass ﬁlter is adjusted for maximum signal amplitude.
Page 86 Making Adjustments 13. Third Converter and Second IF Bandpass Additional Equipment for Models 8590L Option 713 Microwave frequency counter Additional Equipment for 75 Ω Input Adapter, minimum loss Adapter, 75 Ω to 50 Ω Adapter, Type N (f) 75 Ω to BNC (m) 75 Ω Cable, BNC, 75 Ω, 30 cm (12 in) Procedure Second IF Bandpass Filter...
Page 87 Making Adjustments 13. Third Converter and Second IF Bandpass Figure 2-22 Second IF Bandpass Filter Adjustment Setup 8. Press the analyzer switch to ON. LINE 9. Press the following analyzer keys. PRESET , 0, SPAN 10.Connect the microwave spectrum analyzer RF INPUT to J1 of the IF test board.
Page 88 Making Adjustments 13. Third Converter and Second IF Bandpass 600 MHz Adjustment 14.Set the microwave frequency counter controls as follows: 50 Ω/1 MΩ ......... 50 Ω Impedance 10 Hz–500 MHz/500 MHz–18 GHz . 10 Hz–500 MHz SAMPLE RATE .......... Midrange 15.Disconnect W8 from A9J5 600 MHz OUT, then connect the microwave frequency counter to A9J5.
Page 89 Making Adjustments 13. Third Converter and Second IF Bandpass Figure 2-23 LPF Characterization 22.Press INSTRUMENT PRESET on the synthesized sweeper. Set the controls as follows: CW ..............300 MHz POWER LEVEL ........... −15 dBm 23.Allow the power sensors to settle, then on the measuring receiver, press RATIO mode.
Page 90 Making Adjustments 13. Third Converter and Second IF Bandpass 28.Subtract the Mismatch Error (step 22) from the Uncorrected Insertion Loss (step 22). This is the corrected insertion loss. Corrected Insertion Loss____________________dB For example, if the Mismatch Error is +0.3 dB and the uncorrected Insertion Loss is −10.2 dB, subtracting the mismatch error to the insertion loss gives a corrected reading of −10.5 dB.
Page 91 Making Adjustments 13. Third Converter and Second IF Bandpass For example, if the Corrected Insertion Loss is −10.0 dBm, and the measuring receiver reading is −30 dBm, then −30 dBm − (−10.0) dBm = −20 dBm. CAL OUT Power____________________dBm 32.Adjust A9R19 CAL OUT ADJ accordingly if the CAL OUT amplitude is not −20 dBm ±0.4 dB as calculated in step Chapter 2...
Page 92: 14. Comb Generator
Making Adjustments 14. Comb Generator 14. Comb Generator This adjustment applies to: 8592L spectrum analyzers 8593E spectrum analyzers 8596E spectrum analyzers The output signal from the A3A1 comb generator assembly, with the Step Recovery Diode Module (SRD) disconnected, is adjusted for maximum peak-to-peak voltage.
Page 93 Making Adjustments 14. Comb Generator Figure 2-25 Comb Generator Adjustment Location Procedure 1. Turn the analyzer switch to OFF. Remove the instrument cover LINE assembly. 2. Remove the front-end assembly. Refer to the “Front-End Assembly” removal procedure. 3. Remove the A3A1 comb generator assembly from the front-end assembly and place in a service position, leaving W13 connected to the A7 Analog Interface.
Page 94 Making Adjustments 14. Comb Generator Frequency 7. Connect the other end of the SMA cable to the 20 dB attenuator. Connect the output of the 20 dB attenuator to the 10 Hz to 500 MHz input of the frequency counter using adapters and the BNC cable. 8.
Page 95 Making Adjustments 14. Comb Generator • Each time the value of A3A1L3 is changed, reconnect the power cord, set the switch to ON, and adjust A3A1C3 OSC PEAK LINE for maximum signal. The output frequency changes when A3A1C3 OSC PEAK is adjusted. Reinstall the comb generator cover plate and repeat step 8 step...
Page 96: Frequency Response Of The 8590L, 8591C, And 8591E
Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 15. Frequency Response of the 8590L, 8591C, and 8591E This adjustment applies to: 8590L spectrum analyzers 8591E spectrum analyzers 8591C cable TV analyzers The frequency response (ﬂatness) of the analyzer is measured with the corrections off.
Page 97 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E Procedure for System Characterization (75 Ω input) 1. Zero and calibrate the measuring receiver and 1 MHz to 1.8 GHz power sensor as described in the measuring receiver operation manual.
Page 98 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 7. On the synthesized sweeper, press CW and STEP UP, to step through the remaining frequencies listed in Table 2-6. At each new frequency repeat step 5 step 6, and enter each power sensor cal factor into the respective power meter.
Page 99 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 4. On the analyzer, press the following keys. PRESET CAL, More 1 of 4 (OFF) CORRECT ON OFF , 300, FREQUENCY , 37, CF STEP AUTO MAN , 12, SPAN 75 Ω...
Page 100 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E ⇑ 15.On the analyzer, press (step up), to step through FREQUENCY the remaining frequencies listed in Column 1 of Table 2-6. At each new frequency repeat step 13 step 15, entering the power sensor Cal Factor into the measuring receiver as indicated in Column 3 of Table...
Page 101 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 18.Set the frequency synthesizer controls as follows: FREQUENCY ..........41 MHz AMPLITUDE ..........−15 dBm AMPTD INCR ..........0.05 dB 19.Press the following analyzer keys. (OFF) MARKER 1 ON OFF , 12, SPAN , 41,...
Page 102 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 23.Adjust the frequency synthesizer AMPLITUDE for a MKR amplitude reading of −14.00 dBm±.05 dB. Record the frequency synthesizer AMPLITUDE setting here. AMPLITUDE setting (4 MHz)____________________dBm 24.Subtract the frequency synthesizer AMPLITUDE setting (4 MHz) recorded in step 23 from the frequency synthesizer AMPLITUDE...
Page 103 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E 28.To initialize the area of memory where the ﬂatness correction data is stored, press the following keys. INIT FLT PRESET , −2001, FREQUENCY 75 Ω input only: AMPLITUDE More 1 of 2 AMPTD UNITS More 1 of 4 More 2 of 4...
Page 104 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E Table 2-6 Frequency Response Errors Column 1 Column 2 Column 3 Column 4 Column 5 (75 Ω inputs) (75 Ω inputs) Frequency Error Relative Sensor (MHz) to 300 MHz CAL FACTOR System Error Corrected Error...
Page 105 Making Adjustments 15. Frequency Response of the 8590L, 8591C, and 8591E Table 2-6 Frequency Response Errors (Continued) Column 1 Column 2 Column 3 Column 4 Column 5 (75 Ω inputs) (75 Ω inputs) Frequency Error Relative Sensor (MHz) to 300 MHz CAL FACTOR System Error Corrected Error...
Page 106: Frequency Response Of The 8592L/94L, 8593E/94E/95E/96E, And 8594Q
Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q This adjustment applies to: 8592L spectrum analyzers 8593E spectrum analyzers 8594E spectrum analyzers 8594L spectrum analyzers 8594Q QAM analyzer 8595E spectrum analyzers 8596E spectrum analyzers Use the following table to determine which bands are measured and adjusted for your analyzer.
Page 107 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Equipment Required Synthesized sweeper Measuring receiver (used as a power meter) Power sensor, 50 MHz to 26.5 GHz Power sensor, 1 MHz to 2.9 GHz Power splitter Adapter, Type N (m) to APC 3.5 (m) Adapter, Type N (f) to APC 3.5 (m) Adapter, APC 3.5 (f) to APC 3.5 (f) Cable, APC 3.5, 91 cm (36 in.)
Page 108 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 3. Press INSTRUMENT PRESET on the synthesized sweeper. Set the synthesized sweeper controls as follows: CW ..............300 MHz FREQ STEP ........... 72 MHz POWER LEVEL ..........−3 dBm 4.
Page 109 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 13.On the analyzer, press the following keys. FREQUENCY, ⇑ 14.Step through the remaining frequencies listed in Table 2-8. At each new frequency, repeat step 10 step 13 and enter the appropriate power sensor cal factor into the measuring receiver as listed in Column 3 of Table...
Page 110 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 25.Adjust the synthesized sweeper POWER LEVEL for a MKR-TRK amplitude reading of −9 dBm ±0.1 dB on the analyzer. 26.Record the power ratio displayed on the measuring receiver in Column 2 of Table 2-9.
Page 111 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 36.On the synthesized sweeper, press CW and STEP UP. 37.Press the following analyzer keys. FREQUENCY, ⇑ 38.Step through the remaining frequencies listed in Table 2-10. At each new frequency, repeat step 33 step 37 and enter the appropriate...
Page 112 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 46.Press the following analyzer keys. FREQUENCY, ⇑ 47.Step through the remaining frequencies listed in Table 2-10. At each new frequency, repeat step 42 step 46 and enter the appropriate power sensor cal factor into the measuring receiver as listed in Column 3 of Table...
Page 113 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 55.Press the following analyzer keys. MARKERS OFF FREQUENCY, ⇑ 56.Step through the remaining frequencies listed in Table 2-12 (Option 026: Table 2-13). At each new frequency, repeat step 51 step 55 and enter the appropriate power sensor cal factor into the measuring receiver as listed in Column 2 of...
Page 114 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q 62.Use the data keys on the analyzer to enter the amplitude value for 12 MHz from Column 2 of Table 2-8, Frequency Response Errors. Terminate the entry with the key.
Page 115 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 0 0.012 _____________________ 0.05 0.084 _____________________ 0.05...
Page 116 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 0 1.596 _____________________ 1.668 _____________________ 1.740 _____________________...
Page 117 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 1 7.388 _____________________ 7.572 _____________________ 7.756 _____________________...
Page 118 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 1 12.356 _____________________ 12.0 12.540 _____________________ 13.0...
Page 119 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 2 10.332 _____________________ 10.0 10.516 _____________________ 11.0...
Page 120 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 3 15.210 _____________________ 15.0 15.440 _____________________ 15.0...
Page 121 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 4 20.200 _____________________ 20.0 20.350 _____________________ 20.0...
Page 122 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 4 (Option 026) 21.024 _____________________ 21.0 21.172...
Page 123 Making Adjustments 16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q Table 2-8 Frequency Response Errors Column 1 Frequency Column 2 Column 3 (GHz) Measuring Receiver CAL FACTOR Reading (dB) Frequency (GHz) Frequency Response Errors Band 4 (Option 026) 25.020 _____________________ 25.0 25.168...
Page 124: 17. Time And Date
Making Adjustments 17. Time and Date 17. Time and Date This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The time and date are displayed in the top left corner of the display when the timedate mode is activated.
Page 125 Making Adjustments 17. Time and Date To change the time, press the following analyzer keys. CONFIG TIMEDATE SET TIME The active function block of the analyzer will display HHMMSS (hours, minutes, and seconds). Use the data keys on the analyzer to enter the correct time as HHMMSS.
Page 126: Modulator Offset And Gain For Option 010 Or 011
Making Adjustments 18. Modulator Offset and Gain for Option 010 or 011 18. Modulator Offset and Gain for Option 010 or 011 This adjustment applies to: 8590L spectrum analyzers, Option 010 or 011 8591E spectrum analyzers, Option 010 or 011 8591C cable TV analyzers, Option 011 The gain and offset of the modulator is adjusted with the internal Automatic Level Control disabled.
Page 127 Making Adjustments 18. Modulator Offset and Gain for Option 010 or 011 Note that if the display shows CAL SIGNAL NOT FOUND, the routines , −37, default settings are not sufﬁcient to ﬁnd the signal. Press FREQ before performing the CAL routines. This causes the routines to bypass the CAL signal check.
Page 128 Making Adjustments 18. Modulator Offset and Gain for Option 010 or 011 13.Press the following analyzer keys to execute the screen title command. More 1 of 4 More 2 of 4 SERVICE CAL EXECUTE TITLE Note that TGMOD should appear in the upper-left screen annotation below REF.
Page 129: Entering External Alc Correction Constants For Option 010 Or 011
Making Adjustments 19. Entering External ALC Correction Constants for Option 010 or 011 19. Entering External ALC Correction Constants for Option 010 or 011 This adjustment applies to: 8590L spectrum analyzers, Option 010 or 011 8591E spectrum analyzers, Option 010 or 011 8591C cable TV analyzers, Option 011 External automatic level control (ALC) operation is corrected by entering the correction constants (CALTGX slope and offset) into...
Page 130 Making Adjustments 19. Entering External ALC Correction Constants for Option 010 or 011 4. Press the following analyzer keys. CAL, More 1 of 4 More 2 of 4 SERVICE CAL EXECUTE TITLE CAL More 1 of 4 More 2 of 4 SERVICE DIAG DISPLAY CAL DATA NEXT PAGE...
Page 131: Checking The External Alc For Option 010 Or 011
Making Adjustments 20. Checking the External ALC for Option 010 or 011 20. Checking the External ALC for Option 010 or 011 This adjustment applies to: 8590L spectrum analyzers, Option 010 or 011 8591E spectrum analyzers, Option 010 or 011 8591C cable TV analyzers, Option 011 External automatic level control (ALC) operation is veriﬁed by measuring the power necessary to level the tracking generator at a...
Page 132 Making Adjustments 20. Checking the External ALC for Option 010 or 011 Procedure 1. Switch the analyzer on and let it warm up 30 minutes. 2. Connect the analyzer CAL OUT to the RF INPUT. Use only 75 Ω cables, connectors, or adapters on instruments equipped CAUTION with 75 Ω...
Page 133 Making Adjustments 20. Checking the External ALC for Option 010 or 011 Figure 2-31 External ALC Veriﬁcation Adjustment 10.Connect the equipment as shown in Figure 2-31. For Option 011 only: Use the 75 Ω power sensor with an adapter, instead of the 50 Ω power sensor.
Page 134 Making Adjustments 20. Checking the External ALC for Option 010 or 011 17.Convert the ALC voltage recorded in the previous step to dBv using the following equation. ALC Voltage in dBv = ______________20 log (V) The calculated ALC voltage, in dBV, should be ≥−0.75 dBV and ≤+0.75 dBV.
Page 135: Correcting For External Alc Error For Option 010 Or 011
Making Adjustments 21. Correcting for External ALC Error for Option 010 or 011 21. Correcting for External ALC Error for Option 010 or 011 This adjustment applies to: 8590L spectrum analyzers, Option 010 or 011 8591E spectrum analyzers, Option 010 or 011 8591C cable TV analyzers, Option 011 External automatic level control (ALC) operation is corrected by developing two correction constants (CALTGX Slope and Offset).
Page 136 Making Adjustments 21. Correcting for External ALC Error for Option 010 or 011 Procedure 1. Connect a BNC cable from the RF INPUT to the RF OUTPUT. Use only 75 Ω cables, connectors, or adapters on instruments equipped CAUTION with 75 Ω inputs or damage to the input connectors will occur. 2.
Page 137 Making Adjustments 21. Correcting for External ALC Error for Option 010 or 011 6. Connect the equipment as shown in Figure 2-32. For Option 011 only: Use the 75 Ω power sensor with an adapter, instead of the 50 Ω power sensor.
Page 138 Making Adjustments 21. Correcting for External ALC Error for Option 010 or 011 14.Adjust the SRC PWR for −34 dBV as read on the analyzer display. 15.Note the voltage on the DMM. Wait until the reading stabilizes before recording it in the space provided. This is the ALC voltage at a source power of −34 dBV (V = ______________volts dc 16.Calculate the actual slope from the two voltage measurements using...
Page 139: First Lo Distribution Amplifier For Option 009 Or 010
Making Adjustments 22. First LO Distribution Ampliﬁer for Option 009 or 010 22. First LO Distribution Ampliﬁer for Option 009 or 010 This adjustment applies to: 8593E spectrum analyzers, Option 009 or 010 8594E spectrum analyzers, Option 009 or 010 8595E spectrum analyzers, Option 009 or 010 8596E spectrum analyzers, Option 009 or 010 The gate bias for the A3A14 LO distribution ampliﬁer assembly is...
Page 140 Making Adjustments 22. First LO Distribution Ampliﬁer for Option 009 or 010 Figure 2-33 First LO Distribution Ampliﬁer Adjustment Setup 4. Set the digital voltmeter controls as follows: FUNCTION ..........DC VOLTS RANGE ..............10 V RESOLUTION ............ 1 mV 5.
Page 141 Making Adjustments 22. First LO Distribution Ampliﬁer for Option 009 or 010 12.Check that the measuring receiver power level reads greater than +12 dBm. 13.Disconnect the power sensor from LO OUTPUT, then reconnect the 50 Ω termination to LO OUTPUT. 14.Disconnect the DMM leads from A10TP4 and A10TP2.
Page 142: Bitg Power Level For Option 010
Making Adjustments 23. BITG Power Level for Option 010 23. BITG Power Level for Option 010 This adjustment applies to: 8593E spectrum analyzers, Option 010 8594E spectrum analyzers, Option 010 8595E spectrum analyzers, Option 010 8596E spectrum analyzers, Option 010 The BITG has two adjustments for setting the output power.
Page 143 Making Adjustments 23. BITG Power Level for Option 010 Procedure 1. Set the analyzer switch to off. Disconnect the line cord. Remove LINE the cover assembly, then reconnect the line cord. 2. Set the analyzer AOFST by pressing the following keys. PRESET , −2001, FREQUENCY...
Page 144 Making Adjustments 23. BITG Power Level for Option 010 9. On the analyzer, press (ON), 0, SRC PWR ON OFF SGL SWP Note that some analyzers may have sealing compound over A3A15R13 (−10 dB ADJ) and A3A15R18 (0 dB ADJ) adjustments. Remove this compound before making these adjustments.
Page 145: Tracking Oscillator For Option 010
Making Adjustments 24. Tracking Oscillator for Option 010 24. Tracking Oscillator for Option 010 This adjustment applies to: 8593E spectrum analyzers, Option 010 8594E spectrum analyzers, Option 010 8595E spectrum analyzers, Option 010 8596E spectrum analyzers, Option 010 This is not a routine adjustment. This adjustment should only be performed if the range of either the automatic tracking peak adjustment ( ) or the manual tracking peak adjustment...
Page 146 Making Adjustments 24. Tracking Oscillator for Option 010 Additional Equipment for Option 026 Cable, CAL comb Adapter APC-3.5 (f) to APC-3.5 (f) Adapter, Type N (f) to APC-3.5 (f) Adapter, Type BNC (f) to SMA (m) Procedure Frequency Tracking Range Check 1.
Page 147 Making Adjustments 24. Tracking Oscillator for Option 010 6. Set the microwave frequency counter controls as follows: SAMPLE RATE ........... Midrange 10 Hz-500 MHz SWITCH ...500 MHz - 26.5 GHz 500 MHz-26.5 GHz SWITCH ..500 MHz - 26.5 GHz RESOLUTION ............1 Hz 7.
Page 148 Making Adjustments 24. Tracking Oscillator for Option 010 Figure 2-37 Tracking Oscillator Adjustment Setup 15.Set the analyzer switch to on. Press LINE AUX CTRL TRACK GEN, (ON). Allow the analyzer to warm up for at least 5 SRC PWR ON OFF minutes.
Page 149 Making Adjustments 24. Tracking Oscillator for Option 010 22.Calculate Fcenter as shown below, and record it in Table 2-9. Fcenter = (F1 + F2)/2 Chapter 2...
Page 150 Making Adjustments 24. Tracking Oscillator for Option 010 23.Set SRC TRACK ADJ to 350. This sets the tracking oscillator near the center of its frequency range. (The relationship between the SRC TRACK ADJ DAC number and the output frequency is nonlinear.) Adjust SRC TRACK ADJ until the microwave frequency counter reads Fcenter ±100 Hz.
Page 151: Checking The Absolute Amplitude Accuracy For Option 050
Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 25. Checking the Absolute Amplitude Accuracy for Option 050 This adjustment applies to: All 8590 E-Series spectrum analyzers, Option 050 To measure the absolute amplitude accuracy of the analyzer, a signal from a synthesized sweeper is output to both the analyzer and a measurement receiver.
Page 152 Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 Procedure 1. Zero and calibrate the measuring receiver and power sensor in log mode as described in the measuring receiver operation manual. Note that the absolute amplitude accuracy test should only be performed if the ambient temperature is between 20 °C and 30 °C.
Page 153 Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 4. Press on the analyzer and wait for the preset to ﬁnish, then PRESET press the following analyzer keys. , 818, FREQUENCY , 400, SPAN , 100, , 30, VID BW AUTO MAN −dBm , 4,...
Page 154 Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 13.On the synthesized sweeper, press and adjust the POWER LEVEL output amplitude so the analyzer marker amplitude reads −9 dBm ±0.05 dB. 14.Set the power sensor cal factor (for frequency being measured) on the measuring receiver, then record the measuring receiver power reading in Table...
Page 155 Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 Table 2-12 Frequency Response Attenuator 20 dB Synthesized Measuring Receiver Sweeper Frequency (MHz) Min (dBm) Reading (dBm) Max (dBm) +0.3 _________________ +1.7 +0.3 _________________ +1.7 +0.3 _________________ +1.7 +0.3 _________________ +1.7 Frequency Response Input Attenuator 30 dB...
Page 156 Making Adjustments 25. Checking the Absolute Amplitude Accuracy for Option 050 Frequency Response Input Attenuator 40 dB 30.On the analyzer, press the following keys. , 40, dB AMPLITUDE, ATTEN AUTO MAN , 10, AMPLITUDE +dBm 31.Set the FREQUENCY of the analyzer to the measurement frequency shown in Table 2-14.
Page 157: Correcting For Absolute Amplitude Accuracy For Option 050
Making Adjustments 26. Correcting for Absolute Amplitude Accuracy for Option 050 26. Correcting for Absolute Amplitude Accuracy for Option 050 This adjustment applies to: All 8590 E-Series spectrum analyzers, Option 050 The frequency response of the analyzer is adjusted to optimize the amplitude accuracy for the frequency range between 818 MHz and 948 MHz.
Page 158 Making Adjustments 26. Correcting for Absolute Amplitude Accuracy for Option 050 4. Read the amplitude error from the display and record it in Table 2-15 for the 8593E, 8594E, 8595E, and 8596E spectrum analyzers. Table 2-16 for 8591E spectrum analyzers or 8591C cable TV analyzers.
Page 159 Making Adjustments 26. Correcting for Absolute Amplitude Accuracy for Option 050 7. Enter the Corrected Flatness ERROR from Table 2-15 Table 2-16 for the frequency displayed using the DATA keys. Terminate the entry with the +dBm After the new data is entered, the analyzer will automatically jump to the next frequency correction point.
Page 160: Checking The Absolute Amplitude Accuracy For Option 051
Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 27. Checking the Absolute Amplitude Accuracy for Option 051 This adjustment applies to: All 8590 E-Series spectrum analyzers, Option 051 To measure the absolute amplitude accuracy of the analyzer in the frequency ranges 810 MHz to 956 MHz and 1429 MHz to 1501 MHz, a signal from a synthesized sweeper is output to both the analyzer and a measurement receiver.
Page 161 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Figure 2-39 Absolute Amplitude Accuracy Veriﬁcation Procedure 1. Zero and calibrate the measuring receiver and power sensor in log mode as described in the measuring receiver operation manual. Note that the absolute amplitude accuracy test should only be performed if the ambient temperature is between 20 °C and 30 °C.
Page 162 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Log Fidelity 5. Set the power sensor cal factor for 810 MHz on the measuring receiver. 6. On the synthesized sweeper, press POWER LEVEL and adjust the output amplitude so that the analyzer marker amplitude reads −9 dBm ±0.05 dB.
Page 163 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Range 810 MHz to 956 MHz Frequency Response Input Attenuator 10 dB 10. Set the frequency of the analyzer to the ﬁrst measurement frequency shown in Table 2-18. 11.On the synthesized sweeper, press CW and set the frequency to the same measurement frequency as the analyzer is set in the previous step.
Page 164 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 20 dB 16.On the analyzer, press the following keys. , 20, dB AMPLITUDE ATTEN AUTO MAN , 6, AMPLITUDE +dBm 17.Set the of the analyzer to the measurement frequency FREQUENCY shown in Table...
Page 165 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 30 dB 23.On the analyzer, press the following keys. , 30, dB AMPLITUDE ATTEN AUTO MAN , 10, AMPLITUDE +dBm 24.Set the FREQUENCY of the analyzer to the measurement frequency shown in Table 2-20.
Page 166 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 40 dB 30.On the analyzer, press the following keys. , 40, dB AMPLITUDE ATTEN AUTO MAN , 10, AMPLITUDE +dBm 31.Set the FREQUENCY of the analyzer to the measurement frequency shown in Table 2-21.
Page 167 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Range 1429 MHz to 1501 MHz Frequency Response input Attenuator 10 dB 37.Set the frequency of the analyzer to the ﬁrst measurement frequency shown in Table 2-22. 38.On the synthesized sweeper, press CW and set the frequency to the same measurement frequency as the analyzer is set in the previous step.
Page 168 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 20 dB 43.On the analyzer, press the following keys. , 20, dB AMPLITUDE, ATTEN AUTO MAN , 6, AMPLITUDE +dBm 44.Set the of the analyzer to the measurement frequency FREQUENCY shown in Table...
Page 169 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 30 dB 50.On the analyzer, press the following keys. , 30, dB AMPLITUDE ATTEN AUTO MAN , 10, AMPLITUDE +dBm 51.Set the FREQUENCY of the analyzer to the measurement frequency shown in Table 2-24.
Page 170 Making Adjustments 27. Checking the Absolute Amplitude Accuracy for Option 051 Frequency Response Input Attenuator 40 dB 57.On the analyzer, press the following keys. , 40, dB AMPLITUDE ATTEN AUTO MAN , 10, AMPLITUDE +dBm 58.Set the FREQUENCY of the analyzer to the measurement frequency shown in Table 2-25.
Page 171: Correcting For Absolute Amplitude Accuracy For Option 051
Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 28. Correcting for Absolute Amplitude Accuracy for Option 051 This adjustment applies to: All 8590 E-Series spectrum analyzers, Option 051 The frequency response of the analyzer is adjusted to optimize the amplitude accuracy for the frequency range 810 MHz to 956 MHz and 1429 MHz to 1501 MHz.
Page 172 Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 ⇑ 3. Press (step up key) until the ERROR readout for 804 MHz is displayed (781 MHz for an 8591E spectrum analyzer or an 8591C cable TV analyzer). 4. Read the amplitude error from the display and record it in Table 2-26 for the 8593E, 8594E, 8595E, and 8596E spectrum analyzers.
Page 173 Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 7. Enter the Corrected Flatness ERROR from Table 2-26 Table 2-27 for the frequency displayed using the DATA keys. Terminate the entry with the +dBm After the new data is entered, the analyzer will automatically jump to the next frequency correction point.
Page 174 Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 12.Read the amplitude error from the display and record it in Table 2-28 for the 8593E, 8594E, 8595E, and 8596E spectrum analyzers. Use Table 2-29 for 8591E spectrum analyzers or 8591C cable TV analyzers.
Page 175 Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 15.Enter the Corrected Flatness ERROR from Table 2-28 Table 2-29 for the frequency displayed using the DATA keys. Terminate the entry with the +dBm After the new data is entered, the analyzer will automatically jump to the next frequency correction point.
Page 176 Making Adjustments 28. Correcting for Absolute Amplitude Accuracy for Option 051 Chapter 2...
Page 177: 2A. Making Adjustments: If 3335A Source Not Available
Making Adjustments: If 3335A Source Not Available This chapter provides alternative adjustments for the spectrum analyzer which do not require the use of the 3335A Synthesizer Level Generator. Substitute the tests in this chapter for those of the same number found in Chapter 2 , “Making Adjustments,”...
Page 178: Before You Start
Making Adjustments: If 3335A Source Not Available Before You Start Before You Start There are three things you should do before starting an adjustment procedure. • Check that you are familiar with the safety symbols marked on the analyzer, and read the general safety considerations and the symbol deﬁnitions given in the front of this service guide.
Page 179: 6A. Cal Attenuator Error
Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error 6a. Cal Attenuator Error This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers The A12 amplitude control assembly has one 10 dB and two 20 dB nonadjustable ampliﬁers.
Page 180 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error Calculate Actual Attenuation Errors 1. From the calibration data supplied with the 1 dB step attenuator, enter in column 2 of Table 2a-1 the actual attenuation for the corresponding nominal attenuation settings in column 1. 2.
Page 181 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error Procedure The accuracy of the amplitude control attenuator is critical to the proper calibration of the instrument; therefore, this procedure must be carefully and accurately performed. 2a-1. The 75 Ω RF input 1.
Page 182 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error −dBm 8. Set the analyzer’s reference level by pressing , 17, AMPLITUDE 9. Set the 1 dB step attenuator to 8 dB. 10.The 1 dB attenuator step error is the MKR ∆ reading minus the error in the 1 dB step attenuator when set to 9 dB and 8 dB in Table 2a-1.
Page 183 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error 4 dB Step Check 20.To measure the 4 dB step correction, press the following analyzer keys. −dBm , 17, AMPLITUDE 21.Set the 1 dB step attenuator to 8 dB. 22.Press the following analyzer keys.
Page 184 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error 34.The 8 dB attenuator step error is the MKR ∆ reading minus the error in the 1 dB step attenuator when set to 9 dB and 1 dB in Table 2a-1.
Page 185 Making Adjustments: If 3335A Source Not Available 6a. Cal Attenuator Error 39.To conﬁrm that the correct data is stored, access the cal attenuator corrections by pressing the following analyzer keys. CAL, More 1 of 4, More 2 of 4 SERVICE DIAG DISPLAY CAL DATA Note that the cal-attenuator corrections are the ﬁrst ﬁve corrections located in the ERR column.
Page 186: 7A. Log And Linear Amplifier
Making Adjustments: If 3335A Source Not Available 7a. Log and Linear Ampliﬁer 7a. Log and Linear Ampliﬁer This adjustment applies to: All 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers A 21.4 MHz signal is injected into an IF test board that has been inserted in place of the ﬁrst resolution bandwidth assembly, A11.
Page 187 Making Adjustments: If 3335A Source Not Available 7a. Log and Linear Ampliﬁer Procedure 1. Turn the analyzer switch to OFF. Remove the instrument cover LINE assembly. 2. Remove the ﬁrst IF bandwidth ﬁlter assembly, A11. Install the IF test board into the A11 slot. Turn the analyzer switch to ON.
Page 188 Making Adjustments: If 3335A Source Not Available 7a. Log and Linear Ampliﬁer Figure 2a-2 Log and Linear Ampliﬁer Adjustment Setup Log Fidelity Adjustment 7. With the frequency function active, adjust the INCR SET to 100 Hz. ⇑ Press the (step-up key) to maximize the signal level on screen. Adjust the synthesized signal generator amplitude as necessary to keep the signal on the display.
Page 189 Making Adjustments: If 3335A Source Not Available 7a. Log and Linear Ampliﬁer Figure 2a-3 Log and Linear Ampliﬁer Adjustment Location 11.Set the 10 dB step attenuator to 60 dB. Adjust A14R10 OFFSET for the DMM reading of 250 mV ±2 mV. 12.Repeat step 10 step 11...
Page 190 Making Adjustments: If 3335A Source Not Available 7a. Log and Linear Ampliﬁer Table 2a-3 Log Fidelity Check Synthesized Sweeper Level DMM Reading 1000 mV ±1 mV Reference from step 8 Reference − 10 dB 875 mV ±3 mV Reference − 20 dB 750 mV ±4 mV Reference −...
Page 191: 15A. Frequency Response Of The 8590L, 8591C, And 8591E
Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E 15a. Frequency Response of the 8590L, 8591C, and 8591E This adjustment applies to: 8590L spectrum analyzers 8591E spectrum analyzers 8591C cable TV analyzers The frequency response (ﬂatness) of the analyzer is measured with the corrections off.
Page 192 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E Procedure for System Characterization (75 Ω input) 1. Zero and calibrate the measuring receiver and 1 MHz to 1.8 GHz power sensor as described in the measuring receiver operation manual.
Page 193 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E 6. Record the power meter reading in Column 4 of Table 2a-5, taking into account the cal factors of both power sensors. 7. On the synthesized signal generator, press CW and STEP UP, to step through the remaining frequencies listed in Table 2a-5.
Page 194 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E 4. On the analyzer, press the following keys. PRESET CAL, More 1 of 4 (OFF) CORRECT ON OFF , 300, FREQUENCY , 37, CF STEP AUTO MAN , 12, SPAN 75 Ω...
Page 195 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E 16.On the synthesized signal generator, press CW and STEP UP. Entering Flatness Correction Data 17.Enter the pass code by pressing the following analyzer keys. PRESET , −2001, FREQUENCY...
Page 196 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E 2a-5, Column 2 (75 Ω ⇑ 23.Press (step up) and enter the data from Table input: Column 5) for the next data point as described in step 24.Repeat step 22...
Page 197 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E Table 2a-5 Frequency Response Errors Column 1 Column 2 Column 3 Column 4 Column 5 (75 Ω inputs) (75 Ω inputs) Frequency Error Relative Sensor (MHz) to 300 MHz...
Page 198 Making Adjustments: If 3335A Source Not Available 15a. Frequency Response of the 8590L, 8591C, and 8591E Table 2a-5 Frequency Response Errors (Continued) Column 1 Column 2 Column 3 Column 4 Column 5 (75 Ω inputs) (75 Ω inputs) Frequency Error Relative Sensor (MHz) to 300 MHz...
Page 199: Backing Up And Reloading Correction Constants
Backing Up and Reloading Correction Constants This chapter provides information for safe-guarding the correction data stored in RAM on the processor/video board assembly, and restoring the analyzer memory after a repair or replacement of the processor/video board assembly.
Page 200: Before You Start
Backing Up and Reloading Correction Constants Before You Start Commands within parenthesis after a softkey, for example (LOG), are used throughout this chapter to indicate the part of a softkey which should be underlined when the key is pressed. Refer to Chapter 4 for information that is useful when ﬁrst starting to troubleshoot an analyzer failure.
Page 201: Backing Up Analyzer Correction Constants
Backing Up and Reloading Correction Constants Backing Up Analyzer Correction Constants Backing Up Analyzer Correction Constants This section describes how to retrieve the correction-constant data from the instrument memory and record the data as a backup copy. As long as the data remains valid, it can be used to recalibrate the instrument quickly after a memory loss.
Page 202 Backing Up and Reloading Correction Constants Backing Up Analyzer Correction Constants Retrieve the timebase and ﬂatness-correction constants 1. Make a copy of the Correction Constant Backup-Data Record at the end of this chapter. 2. Record the date and instrument serial number. Skip Step 3 Step 4...
Page 203 Backing Up and Reloading Correction Constants Backing Up Analyzer Correction Constants Retrieve the A12 step-gain and CALTGX correction constants 1. Press the following keys to view the current A12 step-attenuator correction constants. More 1 of 4 More 2 of 4 SERVICE DIAG DISPLAY CAL DATA 2.
Page 204: Analyzer Initialization
Backing Up and Reloading Correction Constants Analyzer Initialization Analyzer Initialization This procedure is used to restore the factory/service correction constants to the processor/video board assembly, and to initialize the analyzer settings after a non-volatile memory loss. The loss of non-volatile memory may be caused by the following conditions. •...
Page 205 Backing Up and Reloading Correction Constants Analyzer Initialization If the analyzer is an 8591C, the analyzer's startup routine will identify it as an 8591E. Use this procedure to change the identity back to an 8591C. Press the following keys. (wait until preset is complete) PRESET DISPLAY Change Title...
Page 206 Backing Up and Reloading Correction Constants Analyzer Initialization Reset the power-on units Set the power-on units by pressing the following analyzer keys. PRESET , −2001, FREQUENCY AMPLITUDE, More 1 of 2 (so that 50 is underlined) INPUT Z 50 75 75 Ω...
Page 207: Reloading The Correction Constants
Backing Up and Reloading Correction Constants Reloading the Correction Constants Reloading the Correction Constants This procedure assumes that you have valid correction constant data from a previous backup. Without backup data, new correction constants must be generated by performing the adjustments in Chapter Reload the timebase-correction constant Skip this step for instruments equipped with a precision frequency...
Page 208 Backing Up and Reloading Correction Constants Reloading the Correction Constants Reload the A12 step-gain-correction constants 1. Reload the A12 step-gain-correction constants by pressing the following keys. PRESET , −2001, FREQUENCY More 1 of 4 More 2 of 4 Service Cal SET ATTN ERROR REF LVL OFFSET is displayed in the active-function block above the prompt ENTER CAL ATTEN ERROR 1.
Page 209: Instrument Calibration After Reloading The Correction Constants
Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Instrument Calibration after Reloading the Correction Constants It is necessary to calibrate the analyzer after reloading correction constants. Refer to Chapter 2 in this service guide to perform the following adjustments.
Page 210 Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Table 3-1 Correction Constant Backup-Data Record Agilent Technologies Analyzer Model:_________________ Serial No.:_______________________ Date:___________________________ Table 3-2 RTXO Timebase Correction Constant (Instruments without precision frequency reference) Timebase _________________________________ Table 3-3...
Page 211 Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Table 3-4 Correction Constant Backup-Data Record Agilent Technologies Analyzer Model:_________________ Serial No.:_______________________ Date:___________________________ Table 3-5 Frequency-Response Correction Constants for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, or 8596E Band 0...
Page 212 Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Table 3-7 Correction Constant Backup-Data Record Agilent Technologies Analyzer Model:_________________ Serial No.:_______________________ Date:___________________________ Table 3-8 Frequency-Response Correction Constants for 8592L, 8593E, or 8596E Band 2 Frequency Error...
Page 213 Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Table 3-10 Correction Constant Backup-Data Record Agilent Technologies Analyzer Model:_________________ Serial No.:_______________________ Date:___________________________ Table 3-11 Frequency-Response Correction Constants for 8592L or 8593E Band 4 Frequency Error Frequency...
Page 214 Backing Up and Reloading Correction Constants Instrument Calibration after Reloading the Correction Constants Table 3-13 Correction Constant Backup-Data Record Agilent Technologies Analyzer Model:_________________ Serial No.:_______________________ Date:___________________________ Table 3-14 A12 Step-Attenuator Correction Constants Attenuator ERR (dB) Attenuator ERR (dB) Step Step...
Page 215: Troubleshooting The Analyzer
Troubleshooting the Analyzer This chapter provides information that is useful when starting to troubleshoot an analyzer failure. It provides procedures for troubleshooting common failures and isolating problems in the analyzer.
Page 216: Before You Start
Chapter Component-level information for the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, 8594Q QAM analyzers is provided in the 8590 Series Analyzers Component-Level Repair Service Guide binder. Refer to Chapter 12 for a list of available component-level service information.
Page 217 Service equipment you will need Refer to in Table 1-7, “Recommended Test Equipment,” in Chapter 1 of the 8590 Series Analyzers Calibration Guide for a list of the recommended test equipment needed to troubleshoot and repair the analyzer. Although Agilent Technologies equipment is recommended, any equipment that meets the critical speciﬁcations given in the table...
Page 218 Troubleshooting the Analyzer Before You Start • A25A1 sampler • A26 TV tuner module (Option 107) Qualiﬁed Service Center Only • A130 narrow bandwidth (Option 030 only) Refer to Chapter 12 when ordering replacement assemblies. After an analyzer repair If one or more analyzer assemblies have been repaired or replaced, perform the related adjustments and performance veriﬁcation tests.
Page 219: Problems At Instrument Power-Up
Troubleshooting the Analyzer Problems at Instrument Power-Up Problems at Instrument Power-Up This section describes symptoms that can occur when the analyzer is ﬁrst powered on. Immediately unplug the analyzer from the ac power line if the unit CAUTION shows any of the following symptoms. •...
Page 220 Troubleshooting the Analyzer Problems at Instrument Power-Up Table 4-1 Instrument Failure Symptoms at Power-On Possible Cause Normal Operation* W1 wiring to Line LED, or Line Line fuse, A8 primary circuit failure A8 primary overload −15 V supply failure −15 V supply overload +15 V supply failure +15 V supply overload +5 V supply failure or supply...
Page 221: Troubleshooting An Inoperative Analyzer
Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer Troubleshooting an Inoperative Analyzer When an analyzer appears to be inoperative, there is often little evidence that points directly to the cause. This section provides steps and solutions to typical failure modes relating to an inoperative analyzer.
Page 222 Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer Figure 4-1 A16 Power Supply Test Point Location 3. Turn the analyzer switch to ON. LINE 4. Locate the power supply test point using Figure 4-1. Check the supply voltages as indicated in Table 4-2. Be sure the voltage readings are within the limits shown in Table 4-2.
Page 223 Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer If the fan is not operating The A8 power supply may be hot if the instrument has been operating CAUTION without the fan running. Allow the instrument to cool down before troubleshooting. The B1 Fan receives +12 Vdc from the A8 power supply after the power supply receives the start-up signal, low-power-on (LPWRON) from the front-panel LINE switch.
Page 224 Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer If the +12 Vdc is absent, do the following: • Disconnect the analyzer from the line power. • Remove the A8 power supply. • Check the continuity of the A15 motherboard from pin 1 on A15J19 to pin 8 on A15J13.
Page 225 Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer Figure 4-2 A15J13 Connector-Pin Designation If individual A8 power-supply LEDs are off If one or more of the A8 power-supply LEDs remain off, determine whether the power supply is defective or circuitry on the dc power-supply distribution network is loading the power supply down by substituting another power supply assembly.
Page 226 Troubleshooting the Analyzer Troubleshooting an Inoperative Analyzer If Using Defaults <N> is displayed A dead BT101 battery will cause the loss of all correction-factor and correction-constant data. When the data stored in memory is lost, the analyzer substitutes the default-correction data stored in ROM and performs the instrument-preset routine.
Page 227: Troubleshooting The A2 Display Assembly
Troubleshooting the Analyzer Troubleshooting the A2 Display Assembly Troubleshooting the A2 Display Assembly Use this section when the A8 power supply is functioning but there appears to be a defective A2 display assembly. Check the following conditions before proceeding with the A2 display troubleshooting procedures.
Page 228 Troubleshooting the Analyzer Troubleshooting the A2 Display Assembly High voltage is present within the A2 display and remains for WARNING some time after it has been disconnected. Be careful while troubleshooting the display outside of its enclosure. If an A2 display assembly failure is suspected, the display must be removed from its enclosure for further troubleshooting.
Page 229 Troubleshooting the Analyzer Troubleshooting the A2 Display Assembly • Refer to Figure 4-4 for the location of the test points and check the following signals at A16J8 pins, using an oscilloscope. Check for a 60 Hz TTL signal with a pulse width of approximately 0.2 ms and a repetition rate of approximately 18 ms at pin 2, vertical sync signal.
Page 230 Troubleshooting the Analyzer Troubleshooting the A2 Display Assembly 4. Verify the High-Power-Up signal from the A8 power supply by checking for the +5 V TTL WRUP signal at pin 54 on the A16J1. The A16J1 connector is on the trace side of the A16 processor/video assembly.
Page 231 Troubleshooting the Analyzer Troubleshooting the A2 Display Assembly Figure 4-5 A16J1 Connector-Pin Orientation Figure 4-6 Card-Cage Connector-Pin Orientation Chapter 4...
Page 232: Isolating An Rf, Lo, If, Or Video Problem
Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem Isolating an RF, LO, IF, or Video Problem This section provides techniques for isolating amplitude failures along the signal path from the analyzer input to the A16 processor/video assembly. These troubleshooting methods isolate the failure to one of four functional sections in the analyzer.
Page 233 Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem The DAC value is unique for each analyzer. The CAL AMPTD self-calibration routine adjusts this value based on the amplitude of the digitized video signal on the processor/video board assembly. The calibration routine makes this adjustment while calibrating the reference level at top screen.
Page 234 Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem If there is only a horizontal trace with no signal or noise ﬂoor present 1. Check for a peak-detector failure by switching between the positive-peak detector and sample detector modes. 2.
Page 235 Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem The analyzer may also fail the displayed average noise performance veriﬁcation test. 1. Check the REF LVL CAL DAC value using DISPLAY CAL DATA described in “Using the Internal Service-Diagnostic Routines.” This type of problem causes the DAC value to be close to the 255 maximum.
Page 236 Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem If the displayed signal is distorted This failure may result in the displayed signal having distinct lobes on each side. A high noise ﬂoor may also be present. Note that an intermittent hardware failure during the CAL AMPTD self-calibration routine can cause this type of amplitude failure.
Page 237 Troubleshooting the Analyzer Isolating an RF, LO, IF, or Video Problem If the signal is off frequency in spans <10 MHz only 1. Perform all of the internal service-diagnostic routines. Refer to “Using the Internal Service-Diagnostic Routines” in this chapter. 2.
Page 238: Using The Internal Service-Diagnostic Routines
Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Using the Internal Service-Diagnostic Routines The 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers have an internal service-diagnostics routine menu available within the calibration menus. Reference voltages and ramps are routed through a MUX located on the A7 analog interface board assembly.
Page 239 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the displayed calibration data 1. Press the following analyzer keys. CAL, More 1 of 4, More 2 of 4 SERV DIAG DISPLAY CAL DATA 2. Verify that the digital correction values are within their limits. Refer Chapter 14 for typical examples of the calibration data displays.
Page 240 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the 2 V reference detector This service-diagnostic routine veriﬁes the 2 V reference circuitry on the A16 processor/video board. Verify the 2 V reference by pressing 2V REF DETECTOR • If the signal trace is at the top of the display, the 2 V reference is functioning properly.
Page 241 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the ground reference detector This service-diagnostic routine veriﬁes the ground reference circuitry on the A16 processor/video board. Verify the ground reference by pressing GND REF • If the signal trace is at the bottom of the display, the ground reference is functioning properly.
Page 242 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the main coil driver This service-diagnostic routine veriﬁes that the ramp is driving the YTO. 1. Select a single band (if more than one band is available on your analyzer). Note that any band is acceptable unless the problem is isolated to a speciﬁc band.
Page 243 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the FM coil driver It is only necessary to perform this service-diagnostic routine if the failure appears in narrow spans (10 MHz and below). 1. Set the analyzer span to 10 MHz. Be sure to set the span before performing the service-diagnostic routine.
Page 244 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the FM coil driver for spans >10 MHz It is only necessary to perform this service-diagnostic routine if the failure appears in spans wider than 10 MHz. 1. Set the analyzer span to 11 MHz. 2.
Page 245 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the sweep ramp 1. Verify the sweep ramp by pressing: , 10, , More 2 of 4, SPAN More 1 of 4 SERV DIAG More 1 More 2 SWEEP RAMP • If the signal trace is similar to Figure 4-12 the sweep ramp is functioning properly.
Page 246 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the 10 V reference detector This service-diagnostic routine veriﬁes the 10 V reference. +10 V is used as a reference for the DACs and originates on the A7 analog interface board assembly. Frequency and amplitude errors will occur if this voltage is incorrect.
Page 247 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the −10 V reference detector This service-diagnostic routine veriﬁes the −10 V reference. −10 V is summed with the tuning voltages and used in the main coil driver and originates on the A7 analog interface board assembly. Frequency and amplitude errors will occur if this voltage is incorrect.
Page 248 Troubleshooting the Analyzer Using the Internal Service-Diagnostic Routines Verify the YTF driver This service-diagnostic routine applies only to the 8592L, 8593E, 8595E, and 8596E spectrum analyzers with high band problems. This routine veriﬁes the YTF driver. The YTF is a sensitive device and the minimum of ramp voltage error can result in the YTF being out of speciﬁcation.
Page 249: Troubleshooting The A16 Processor/Video Board Assembly
Troubleshooting the A16 Processor/Video Board Assembly After you have determined that the problem is caused by the A16 processor/video assembly, use the following procedures. The 8590 Series Analyzers Component-Level Repair Service Guide is required to assist with these procedures. Refer to...
Page 250 Troubleshooting the Analyzer Troubleshooting the A16 Processor/Video Board Assembly 5. Switch between POS PEAK and SAMPLE detector modes. If the signal appears when in the SAMPLE detector, suspect something in the positive-peak detector circuit. If the analyzer does not respond (locked up) If the analyzer is not responding or is continuously doing instrument presets, and cycling power does not correct the problem, perform the following steps.
Page 251 Troubleshooting the Analyzer Troubleshooting the A16 Processor/Video Board Assembly 5. Check A16U12 for the conditions described in Table 4-3 while in the free-run mode. Refer to the component-level information for the A16 processor/video board assembly. Figure 4-16 A16U12 Pin Location Table 4-3 Free-Run Mode Test Points on A16 A16U12...
Page 252 Troubleshooting the Analyzer Troubleshooting the A16 Processor/Video Board Assembly Chapter 4...
Page 253: Troubleshooting The If Section
Troubleshooting the IF Section This chapter provides troubleshooting information for the IF section of the 8590 E-Series and L-Series spectrum analyzers and 8591C cable TV analyzers and 8594Q QAM analyzers. Troubleshooting information for tracing signals on the A15 motherboard assembly is also provided. Refer to Chapter 4, “Troubleshooting the Analyzer”...
Page 254: Before You Start
Service Equipment You Will Need Refer to the table entitled, “Recommended Test Equipment,” in Chapter 1 of the 8590 Series Analyzers Calibration Guide for a list of the recommended test equipment needed to troubleshoot and repair the analyzer. Although Agilent Technologies equipment is recommended, any equipment that meets the critical speciﬁcations given in the table...
Page 255: After An Analyzer Repair
Troubleshooting the IF Section After an Analyzer Repair After an Analyzer Repair If one or more analyzer assemblies have been repaired or replaced, perform the related adjustments and performance veriﬁcation tests. Refer to Chapter 2, “Making Adjustments” for a table of Adjustments and Tests for Replaced or Repaired Assemblies, for the related adjustments and performance veriﬁcation tests required for each assembly.
Page 256: If Power-Level Measurement
Troubleshooting the IF Section IF Power-Level Measurement IF Power-Level Measurement The following measurement procedures are used for troubleshooting along the 21.4 MHz IF signal path from the A9 third converter assembly, through the IF section, to output of the A14 log ampliﬁer assembly.
Page 257 Troubleshooting the IF Section IF Power-Level Measurement To check the gains for the IF assemblies The overall gain of individual assemblies in the IF section are listed below. The gain level provided for the A12 assembly is correct only when the analyzer is set as provided in step three, above. •...
Page 258 Troubleshooting the IF Section IF Power-Level Measurement To inject a signal at the output of the A11 bandwidth ﬁlter assembly Inject a 21.4 MHz signal at the output of the A11 bandwidth ﬁlter assembly with the following procedure. Refer to Figure 9-1 while performing this procedure.
Page 259 Troubleshooting the IF Section IF Power-Level Measurement To inject a signal at the output of the A13 bandwidth ﬁlter assembly Inject a 21.4 MHz signal at the output of the A13 bandwidth ﬁlter assembly with the following procedure. Refer to Figure 9-1 while performing this procedure.
Page 260 Troubleshooting the IF Section IF Power-Level Measurement To check bandwidth control lines for the A11/A13 bandwidth ﬁlter assemblies Table 5-1 provides nominal bandwidth control voltages sent to the A11 and A13 bandwidth ﬁlter assemblies from the A7 analog interface assembly. A calibrated analyzer produces control voltages similar to the values in Table 5-1.
Page 261 Troubleshooting the IF Section IF Power-Level Measurement To check IF section gain control Table 5-2 lists the changes in IF Section gain that alter the displayed signal position when the reference level is changed in increments as small as 1 dB. The control voltages from the A7 analog interface assembly that change the gain of speciﬁc IF assemblies are provided in Table 5-3,...
Page 262 Troubleshooting the IF Section IF Power-Level Measurement Table 5-2 IF Section Gain Table in dB Reference A12 Step A14 Gain A16 Video A16 Video Level Calibration Gain † (Linear Offset Offset (dBm) * Attenuator (Log/Linear Mode) (Log Mode) (Linear (Log/Linear Mode) ‡...
Page 263 Troubleshooting the IF Section IF Power-Level Measurement Control lines for the A12 amplitude control assembly Table 5-3 Table 5-4 provide the control line output from the A7 analog interface assembly that change the gain of the A12 assembly when the reference level is changed. The calibration attenuator settings Table 5-4 provide reference-level changes in 1 dB increments for the full reference-level range of the analyzer.
Page 264 Troubleshooting the IF Section IF Power-Level Measurement Table 5-4 Calibration-Attenuator Control Lines Reference Calibratio IFA1 IFA2 IFA3 IFA4 IFA5 Level (1 dB) (2 dB) (4 dB) (8 dB) (16 dB) (dBm) Attenuato A12J2-4 A12J2-3 A12J2-2 A12J2-1 A12J2-11 −1 −2 −3 −4 −5 −6...
Page 265 Troubleshooting the IF Section IF Power-Level Measurement To check linear gain control lines for the A14 log ampliﬁer Table 5-5 provides the control line voltages from the A7 analog interface assembly to the A14 log ampliﬁer assembly. When the analyzer is in linear mode, the seven A14 log ampliﬁer stages are biased to operate as linear ampliﬁers.
Page 266: Troubleshooting The A15 Motherboard Assembly
Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Troubleshooting the A15 Motherboard Assembly Use this section to identify and locate all the signals and voltages that pass through the A15 motherboard assembly. The location of active components on the motherboard are also provided. The following information is provided in this section.
Page 267 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Figure 5-1 A15 Motherboard Connector Designation • All connector pins on A9J20 are tied to ground (ACOM). • The A15J1 connector for the A7 analog interface assembly is installed in a position that is reversed when compared to card-cage connectors A15J3, A15J4, A15J5, and A15J6;...
Page 268 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Figure 5-2 A15 Connectors with Additional Associated Circuitry (1 of 2) Chapter 5...
Page 269 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Figure 5-2 A15 Connectors with Additional Associated Circuitry (2 of 2) • The A15 motherboard pin designation for the 21.4 MHz IF signal path is provided in Table 5-7. • All the connector pins with the same number are connected in parallel for the card-cage connectors A15J3, A15J4, A15J5, and A15J6.
Page 270 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Figure 5-3 A15J13 Connector-Pin Designation Chapter 5...
Page 271 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Figure 5-4 Card-Cage Connector Pin Designation Chapter 5...
Page 272 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-6 A15 Motherboard Mnemonic Descriptions Mnemonic Full Name Description 21.4 MHz IF 21.4 MHz IF The 21.4 MHz IF signal between the A9 Third Converter assembly and the detector on the A14 Log Ampliﬁer assembly.
Page 273 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-6 A15 Motherboard Mnemonic Descriptions (Continued) Mnemonic Full Name Description AUX_VIDEO Auxiliary Video A detected video signal (0 — 2 V) that has passed through the video ﬁlters. No amplitude corrections have been applied to this signal.
Page 274 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-6 A15 Motherboard Mnemonic Descriptions (Continued) Mnemonic Full Name Description HSWP High Sweep Provides control for the analyzer display sweep and retrace. A TTL high starts a sweep and a TTL low initiates a retrace.
Page 275 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-6 A15 Motherboard Mnemonic Descriptions (Continued) Mnemonic Full Name Description LOG_LIN Log Linear Controls switching between log and linear modes on the A14 Log Ampliﬁer assembly. LPWRON Low Power On The front-panel line switch provides a TTL low when the switch is depressed.
Page 276 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-7 A15 Motherboard Pin Designations Mnemonic Instrument Assemblies Card Cages Slots 1, 2, 3, 4 21.4 MHz IF 22, 23 +10 V +12 V 13, 32 27, 57 +15 V 3, 33 1, 2, 8, 18...
Page 277 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-7 A15 Motherboard Pin Designations (Continued) Mnemonic Instrument Assemblies Card Cages Slots 1, 2, 3, 4 ADR3 ADR4 ANA_TEST AUX_IF b, c AUX_IF_BP b, c AUX_VIDEO COUNT_IF CRD_ANLG_1 CRD_ANLG_2 DCOM 14-17, 17, 22, 33-36...
Page 278 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-7 A15 Motherboard Pin Designations (Continued) Mnemonic Instrument Assemblies Card Cages Slots 1, 2, 3, 4 IFA3 IFA4 IFA5 IFG1 IFG2 IFG3 IFG4 IFG5 IFG6 INTERBUS IOB0 IOB1 IOB2 IOB3 IOB4 IOB5 IOB6...
Page 279 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Table 5-7 A15 Motherboard Pin Designations (Continued) Mnemonic Instrument Assemblies Card Cages Slots 1, 2, 3, 4 IOB14 IOB15 LBIO LINE_TRIG LOG_LIN LPWRON LTIO REF_CAL SWEEP_RAMP VIDEO_IF VTO_TUNE a. 8590 E-Series, 8591C and 8594Q only. b.
Page 280 Troubleshooting the IF Section Troubleshooting the A15 Motherboard Assembly Chapter 5...
Page 281: Troubleshooting The Rf Section
Troubleshooting the RF Section This chapter provides troubleshooting information for the RF section of the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers. This chapter is divided into two sections.
Page 282: Before You Start
Troubleshooting the RF Section Before You Start describes troubleshooting Section 6a, “8590L, 8591C, and 8591E,” information for the 8590L and 8591E spectrum analyzers and 8591C cable TV analyzers. describes Section 6b, “ 8592L/94L, 8594Q.and 8593E/94E/95E/96E,” troubleshooting information for the 8592L, 8593E, 8594E, 8594L, 8595E, and 8596E spectrum analyzers and 8594Q QAM analyzer.
Page 283: Service Equipment You Will Need
Service Equipment You Will Need Refer to the table entitled, “Recommended Test Equipment,” in Chapter 1 of the 8590 Series Analyzers Calibration Guide for a list of the recommended test equipment needed to troubleshoot and repair the analyzer. Although Agilent Technologies equipment is recommended, any equipment that meets the critical speciﬁcations given in the table can be substituted for...
Page 284: 6A. 8590L, 8591C, And 8591E
Troubleshooting the RF Section 6a. 8590L, 8591C, and 8591E 6a. 8590L, 8591C, and 8591E This section describes the RF section troubleshooting process for the 8590L and 8591E spectrum analyzers and 8591C cable TV analyzers. Making RF Power-Level Measurements The power level ranges listed for measurements A through G in Table 6-1 apply after performing the following steps: 1.
Page 285 Troubleshooting the RF Section 6a. 8590L, 8591C, and 8591E Connector Pin-Out Information The RF section receives control voltages for the A3 attenuator from the A7 analog interface assembly. It also receives power-supply voltages for the A3 attenuator and A5 second converter assemblies from the A7 analog interface assembly.
Page 286 Troubleshooting the RF Section 6a. 8590L, 8591C, and 8591E To check control of the A3 input attenuator The A7 analog interface assembly controls the three attenuator steps in the A3 input attenuator. Each attenuator step requires one control line, as shown in Table 6-3.
Page 287: 6B. 8592L/94L, 8594Q, And 8593E/94E/95E/96E
Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E This section describes the RF section troubleshooting process for the 8592L, 8593E, 8594E, 8594L, 8595E, and 8596E spectrum analyzers, and 8594Q QAM analyzers. Making RF Power-Level Measurements The power level ranges listed for measurements A through E in Table 6-4 apply after performing the following steps: 1.
Page 288 Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E Table 6-4 Power Levels at Measurement Points Measurement Measurement Power Level Range * Point Frequency Band 0 Band 1 Band 2 Band 3 Band 4 92L, 93E, 92L, 93E, 92L, 93E, 92L, 93E 92L,93E 94E, 94L,...
Page 289 Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E Connector Pin-Out Information The RF section receives control voltages from the A7 analog interface assembly. It also receives power-supply voltages for the attenuator and second converter assemblies from the A7 analog interface assembly. Table 6-8 and Table 6-9 identify the signals that are supplied to the two RF assemblies for both the standard and option 026 spectrum analyzers.
Page 290 Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E Table 6-7 A7J4 2nd Converter Drive Pin Designation for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, 8596E A7J4 Pin Number Signal Description 2nd Mixer Bias +5 A ACOM +10 VF PIN_SW Table 6-8 A7J301 YTF Driver Pin Designation for 8592L, 8593E, 8595E, 8596E A7J301 Signal Description...
Page 291 Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E To check control of the A3A5 input attenuator The A7 analog interface assembly controls the three attenuator steps and blocking capacitor in the A3A5 input attenuator using eight control lines. Refer to the RF section block diagram for your analyzer at the end of Chapter , “Assembly Descriptions and Block Diagrams.”...
Page 292 Troubleshooting the RF Section 6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E Table 6-11 Input Attenuator Control Output at A7J5 for 8594E, 8594L, 8594Q, 8595E, 8596E 10 dB 40 dB 20 dB Blocking Step Step Step Capacitor Attenuator Setting (dB) Pin 2 Pin 1 Pin 9 Pin 4 Pin 8...
Page 293: Replacing Major Assemblies
Replacing Major Assemblies The procedures in this chapter describe the removal and replacement of major assemblies in the 8590L, 8591C, 8591E, 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E analyzers.
Page 294: Before You Start
Service Equipment You Will Need Refer to Chapter 1 of the 8590 Series Analyzers Calibration Guide for a list of the recommended test equipment needed to troubleshoot and repair the analyzer. Although Agilent Technologies equipment is recommended, any equipment that meets the critical speciﬁcations...
Page 295: After An Analyzer Repair
Replacing Major Assemblies After an Analyzer Repair After an Analyzer Repair If one or more analyzer assemblies have been repaired or replaced, perform the related adjustments and performance veriﬁcation tests. Refer to Chapter 2 for a table of Adjustments and Tests for Replaced or Repaired Assemblies, for the related adjustments and performance veriﬁcation tests required for each assembly.
Page 296: Instrument Cover
Replacing Major Assemblies Instrument Cover Instrument Cover This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Disconnect the analyzer from ac power. To prevent damage to the front frame, use a soft cloth or towel between CAUTION the work surface and the front frame.
Page 297 Replacing Major Assemblies Instrument Cover Replacement 1. Disconnect the analyzer from ac power. To prevent damage when replacing the instrument cover, remember the CAUTION following: • Place a soft cloth or towel between the work surface and the front frame. •...
Page 298: A1 Front-Frame Assembly
Replacing Major Assemblies A1 Front-Frame Assembly A1 Front-Frame Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 299 Replacing Major Assemblies A1 Front-Frame Assembly 11.Disconnect W1 (7) from A16J9. 12.Place the analyzer with the front frame forward and the top side facing up on the work surface. 13.Disconnect W7 from A9J2. 14.Remove the ﬁve screws (9) that secure the front frame to the main chassis sides.
Page 300 Replacing Major Assemblies A1 Front-Frame Assembly Figure 7-1 A1 Front-Frame Replacement Chapter 7...
Page 301 Replacing Major Assemblies A1 Front-Frame Assembly Replacement 1. Connect W7 to A9J2 and route the cable down between the A2 Display assembly and the Front-End assembly. 2. Connect the W4 ribbon cable to the A1A1 Keyboard assembly. 3. Align the W10 semi-rigid cable (4) with the INPUT connector while replacing the front frame on the main chassis.
Page 302: A1A1 Keyboard/Front-Panel Keys
Replacing Major Assemblies A1A1 Keyboard/Front-Panel Keys A1A1 Keyboard/Front-Panel Keys This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Remove the front frame from the analyzer. Refer to the “A1 Front-Frame Assembly.” removal procedure.
Page 303: A2 Display
Replacing Major Assemblies A2 Display A2 Display This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 304 Replacing Major Assemblies A2 Display 11.Slowly remove the display assembly from the front of the instrument. Continue to route W2 and W3 through the slot (4) as the display is removed. Figure 7-2 A2 Display Replacement 12.Remove the screws and the ﬁber washer (6) that secure the A2 Display to its enclosure (7).
Page 305 Replacing Major Assemblies A2 Display A high-voltage potential may remain within the A2 Display WARNING assembly for some time after it has been removed from the instrument. Do not attempt to remove the post-accelerator lead from the cathode-ray tube. 14.Disconnect W2 (9) and W3 (10) from the display. Figure 7-3 CRT Assembly Chapter 7...
Page 306 Replacing Major Assemblies A2 Display Figure 7-4 A2 Display, Rear View Replacement 1. Connect W2 and W51 (8) and W3 (9) to the A2 Display. See Figure 7-4. The plastic locking clip on the W3 connector (9) is fragile. Protect the CAUTION connector by wrapping it with a piece of tape before pushing it through the opening (7) on the enclosure.
Page 307 Replacing Major Assemblies A2 Display 4. Place the instrument on the work surface so that it is resting on its right side. 5. Position the display assembly part of the way into the front of the instrument. 6. Begin to push W2 and W3 out through the slot (4) in the instrument chassis.
Page 308: Rf Assembly
Replacing Major Assemblies RF Assembly RF Assembly This procedure applies to: 8590L and 8591E spectrum analyzers 8591C cable TV analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 309 Replacing Major Assemblies RF Assembly 15.Carefully remove the RF assembly from the analyzer. To disassemble or assemble the RF assembly, refer to the Foldouts at NOTE the end of Chapter Chapter 11 provides cable location information for the RF assembly and the tracking generator assembly. Figure 7-5 RF Assembly Replacement Chapter 7...
Page 310 Replacing Major Assemblies RF Assembly Replacement 1. Place the analyzer with the top side facing up. 2. Align the W10 semi-rigid cable (2) with the INPUT connector, and W31, if equipped with a tracking generator, with the OUTPUT connector as the Rf assembly is placed into the analyzer. Make sure that none of the cables are pinched while installing the RF assembly.
Page 311: A3 Front-End Assembly
Replacing Major Assemblies A3 Front-End Assembly A3 Front-End Assembly This procedure applies to: 8592L spectrum analyzers 8593E spectrum analyzers 8594E spectrum analyzers 8594L spectrum analyzers 8594Q QAM analyzers 8595E spectrum analyzers 8596E spectrum analyzers General Instructions • The A3 Front-End assembly has static-sensitive components. Read CAUTION Chapter 15 before proceeding.
Page 312 Replacing Major Assemblies A3 Front-End Assembly When replacing the A3A8 YTF, closely examine the replacement YTF. It NOTE may have its wiring label installed in one of two ways. Either orientation is correct as long as A3A8J2 is connected to the SMA adapter and proper polarity of the tuning wires is observed.
Page 313 Replacing Major Assemblies A3 Front-End Assembly Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.” removal procedure. 2. Remove the front-frame assembly. Refer to the “A1 Front-Frame Assembly.” removal procedure. 3. Place the instrument so that its left side is resting on the work surface.
Page 314 Replacing Major Assemblies A3 Front-End Assembly 7. Place the instrument on the work surface with the top side facing up. 8. Remove the A7 Analog Interface assembly. Refer to the “A7 Analog Interface Assembly.” removal procedure. 9. Note how the cables attached to the A9 Third Converter assembly are dressed.
Page 315 Replacing Major Assemblies A3 Front-End Assembly Figure 7-8 A3 Front-End Replacement, Top View Chapter 7...
Page 316 Replacing Major Assemblies A3 Front-End Assembly Replacement 1. Tuck all cables and wire harnesses on the A3 Front-End assembly (except for cables W20 and W24) down into the space (5) between the “D” bracket and the A3A9 ﬁlter. This reduces the possibility of damaging wires while replacing the front-end assembly.
Page 317 Replacing Major Assemblies A3 Front-End Assembly 16.Dress all cables as noted during the removal procedure. 17.For card-cage options with additional wiring, replace the tie-wraps and dress the wiring so that there will be no interference with the instrument cover assembly. 18.Replace the front-frame assembly.
Page 318: A7 Analog Interface Assembly
Replacing Major Assemblies A7 Analog Interface Assembly A7 Analog Interface Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 319 Replacing Major Assemblies A7 Analog Interface Assembly Figure 7-9 A7 Analog Interface Assembly Replacement Chapter 7...
Page 320 Replacing Major Assemblies A7 Analog Interface Assembly Replacement Serious instrument damage will result if any wire connector is not CAUTION installed correctly. A connector can be installed backwards or in the wrong position. Inspect each connector and make sure it is not damaged or missing a key plug.
Page 321 Replacing Major Assemblies A7 Analog Interface Assembly 3. Install the A7 assembly. Slide the A7 assembly toward the back of the A7 slot so that the front-end-to-chassis spacer, mounted on the leading edge of the A7 assembly, will drop smoothly into place. 4.
Page 322: A8 Power Supply
Replacing Major Assemblies A8 Power Supply A8 Power Supply This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.” removal procedure. 2.
Page 323 Replacing Major Assemblies A8 Power Supply Figure 7-11 A8 Power Supply Replacement Chapter 7...
Page 324: A15 Motherboard And If Extrusion
Replacing Major Assemblies A15 Motherboard and IF Extrusion A15 Motherboard and IF Extrusion This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal of the A15 Motherboard 1.
Page 325 Replacing Major Assemblies A15 Motherboard and IF Extrusion Use the two-prong board-puller tool to remove the IF board assemblies CAUTION that do not have attached covers. Traces on the printed circuit boards can be damaged if tools with sharp edges are used to remove the IF board assemblies.
Page 326 Replacing Major Assemblies A15 Motherboard and IF Extrusion Do not twist the motherboard sideways while removing it from the CAUTION instrument. This avoids damaging the connector on the A16 Processor/Video Board assembly that is mated with the connector on the back side of the A15 motherboard. 13.Pull the motherboard straight up and out of the instrument chassis.
Page 327 Replacing Major Assemblies A15 Motherboard and IF Extrusion Figure 7-13 A15 Motherboard with IF Section Replacement of the A15 Motherboard 17.Position the IF extrusion assembly on the work surface with its IF board assembly slots facing up. There is no “top” or “bottom” to the IF extrusion;...
Page 328 Replacing Major Assemblies A15 Motherboard and IF Extrusion The IF extrusion assembly contains one ﬂat extrusion end-section. NOTE Make sure that the extrusion assembly is positioned with the ﬂat extrusion end-section next to the A8 Power Supply connector (18). See Figure 7-13.
Page 329 Replacing Major Assemblies A15 Motherboard and IF Extrusion 28.Replace the 40 screws (7) that secure the IF board assemblies to the IF extrusion. 29.Connect the B1 Fan wire harness (6) to A15J19 at the rear of the motherboard. 30.Connect the W19 coaxial cable (5) on A15J18 at the rear of the motherboard.
Page 330: A16 Processor/Video Board And A16A1 Memory Board Assembly
Replacing Major Assemblies A16 Processor/Video Board and A16A1 Memory Board Assembly A16 Processor/Video Board and A16A1 Memory Board Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Before Replacing the A16 Processor/Video Board Assembly or the A16A1 Memory Board Assembly Frequency response and cal attenuator correction constants (for the A12 amplitude control board assembly) are stored in battery-backed...
Page 331 Replacing Major Assemblies A16 Processor/Video Board and A16A1 Memory Board Assembly Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.” removal procedure. 2. Place the analyzer on the work surface with the bottom side facing 3. If the instrument is equipped with Option 041 or Option 043: •...
Page 332 Replacing Major Assemblies A16 Processor/Video Board and A16A1 Memory Board Assembly Figure 7-14 A16 Processor/Video Board Replacement Chapter 7...
Page 333 Replacing Major Assemblies A16 Processor/Video Board and A16A1 Memory Board Assembly Replacement To prevent damage to connectors A16J1 and A15J2, make sure that CAUTION they are mated correctly before pushing the A16 assembly into place. Avoid twisting the A16 assembly from side to side during installation. 1.
Page 334 Replacing Major Assemblies A16 Processor/Video Board and A16A1 Memory Board Assembly After Replacing the A16 Processor/Video Board Assembly The A16A1 stores all the data necessary for analyzer operation including the model identiﬁcation and serial number. All that is required is to power up the analyzer. If the A16A1 memory board has lost this data for any reason, it will be necessary to perform the routines outlined in “After Replacing the...
Page 335: A16 Processor/Video Board Firmware Roms
Replacing Major Assemblies A16 Processor/Video Board Firmware ROMs A16 Processor/Video Board Firmware ROMs This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1.
Page 336 Replacing Major Assemblies A16 Processor/Video Board Firmware ROMs Figure 7-15 A16 Processor/Video Board Firmware ROM Replacement Adjustments Required after ROM Replacement 1. Connect the instrument to ac power and turn the analyzer ON. 2. Press PRESET 3. Let the analyzer warm up for 30 minutes. A FREQ UNCAL message may appear on screen but will disappear after NOTE the successful completion of the self-calibration routines.
Page 337: A16A1Bt1 Battery
Replacing Major Assemblies A16A1BT1 Battery A16A1BT1 Battery This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Battery A16A1BT1 contains lithium iodide. There is a danger of WARNING explosion if the battery is incorrectly replaced.
Page 338 Replacing Major Assemblies A16A1BT1 Battery A16A1C1 maintains the voltage required to back up RAM for a NOTE maximum of 8 hours. A16A1C1 is the large round capacitor next to A16A1BT1. 4. Replace and solder the leads of the new battery, ensuring proper polarity as silkscreened on the A16A1 board assembly.
Page 339: A17 Memory Card Reader Assembly
Replacing Major Assemblies A17 Memory Card Reader Assembly A17 Memory Card Reader Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 340 Replacing Major Assemblies A17 Memory Card Reader Assembly Replacement 1. Place the analyzer on the worksurface with the bottom side facing 2. Place the A17 Memory Card Reader assembly on the memory-card base. 3. Replace the four screws (4) that secure the A17 assembly to the memory-card base.
Page 341 Replacing Major Assemblies A17 Memory Card Reader Assembly Figure 7-16 A17 Memory Card Reader Replacement Chapter 7...
Page 342: A25 Counter-Lock Assembly
Replacing Major Assemblies A25 Counter-Lock Assembly A25 Counter-Lock Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.” removal procedure. 2.
Page 343 Replacing Major Assemblies A25 Counter-Lock Assembly Figure 7-17 A25 Counter-Lock Replacement Chapter 7...
Page 344: B1 Fan
Replacing Major Assemblies B1 Fan B1 Fan This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Removal 1. Disconnect the analyzer from ac power. 2. Place the instrument on the worksurface with the back end facing out.
Page 345 Replacing Major Assemblies B1 Fan Figure 7-18 B1 Fan Replacement Replacement 1. Position the fan grill on the B1 Fan (3). See Figure 7-18. The fan label must be visible through the fan grill to make sure that the fan provides the correct air ﬂow.
Page 346: Rear-Frame Assembly
Replacing Major Assemblies Rear-Frame Assembly Rear-Frame Assembly This procedure applies to: 8590 E-Series and L-Series spectrum analyzers 8591C cable TV analyzers 8594Q QAM analyzers Use ESD precautions when performing this replacement procedure. CAUTION Removal 1. Remove the instrument cover assembly. Refer to the “Instrument Cover.”...
Page 347 Replacing Major Assemblies Rear-Frame Assembly 3. Place the rear frame on the main chassis. 4. Replace the W6 jumper between the 10 MHz REF OUTPUT and the EXT REF IN connectors. 5. Replace the six screws (three on each side) that secure the rear frame to the main chassis.
Page 348 Replacing Major Assemblies Rear-Frame Assembly Chapter 7...
Page 349: If You Have A Problem
If You Have A Problem Your spectrum analyzer is built to provide dependable service. It is unlikely that you will experience a problem. However, Agilent Technologies’ worldwide sales and service organization is ready to provide you the support you need.
Page 350: Contacting Agilent Technologies
If further troubleshooting is necessary, refer to Chapter 4 in this guide or return the analyzer to Agilent Technologies. This chapter is organized into the following sections: Check the Basics.
Page 351: Check The Basics
If You Have A Problem Check the Basics Check the Basics In general, a problem can be caused by a hardware failure, a software error, or a user error. Often problems may be solved by repeating what was being done when the problem occurred. A few minutes spent in performing these simple checks may eliminate time spent waiting for instrument repair.
Page 352: Calling Agilent Technologies Sales And Service Offices
Calling Agilent Technologies Sales and Service Ofﬁces Calling Agilent Technologies Sales and Service Ofﬁces Use the information in this section to obtain Agilent Technologies sales and service ofﬁces information. Sales and service ofﬁces are located around the world to provide complete support for your analyzer. To obtain servicing information or to order replacement parts, contact the nearest Agilent Technologies sales and service ofﬁce listed in...
Page 353 If You Have A Problem Calling Agilent Technologies Sales and Service Ofﬁces A serial-number label is attached to the rear of the analyzer. This label has two instrument identiﬁcation entries: the ﬁrst provides the instrument's serial number and the second provides the identiﬁcation number for each option built into the instrument.
Page 354 Calling Agilent Technologies Sales and Service Ofﬁces Agilent Technologies sales and service ofﬁces Refer to the following table for Agilent Technologies sales and service ofﬁce telephone and address information. By internet, phone, or fax, get assistance with all your test and measurement needs.
Page 355: Returning Your Analyzer For Service
Returning Your Analyzer for Service Returning Your Analyzer for Service Use the information in this section if you need to return the analyzer to Agilent Technologies. Package the analyzer for shipment Use the following steps to package the analyzer for shipment to Agilent Technologies for service: 1.
Page 356 If You Have A Problem Returning Your Analyzer for Service Chapter 8...
Page 357: Assembly Descriptions And Block Diagrams
Assembly Descriptions and Block Diagrams This chapter describes the operation of the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers and 8594Q QAM analyzers that is useful when ﬁrst troubleshooting an analyzer failure.
Page 358: Assembly Descriptions And Block Diagrams
Assembly Descriptions and Block Diagrams Component-level information for the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers is provided in the 8590 Series Analyzers Component-Level Repair Service Guide. Refer to Chapter 12 for a list of available component-level service information.
Page 359: Rf And Lo Section For 8590L, 8591E, And 8591C Spectrum Analyzers
Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers This section describes the operation of the A3 front-end assembly and the A25 counterlock assembly for the 8590L and 8591E spectrum analyzers and 8591C cable TV analyzers.
Page 360 Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers A5 Second Converter The 2.1214 GHz ﬁrst IF signal is downconverted by the A5 second converter to a 321.4 MHz second IF. This is accomplished by mixing the ﬁrst IF signal with the 1.8 GHz second LO signal.
Page 361 Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers 5. Changes the amplitude of the 21.4 MHz IF signal to calibrate the analyzer during the self-calibration routine. CAL AMPTD • The amplitude of the detected 21.4 MHz IF signal is measured on the A16 processor/video assembly.
Page 362 Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers The sampling oscillator provides a 279 to 298 MHz driving signal to the A25A1 sampler. The ﬁrst LO signal is also applied to A25A1 sampler. The ﬁrst LO signal is mixed with a harmonic of the sampling oscillator signal to generate the sampler IF.
Page 363 Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers A6 YIG Tuned Oscillator (YTO) The A6 YTO contains a YIG (yttrium-iron-garnet) which is a ferro-magnetic material polished into a small sphere and precisely oriented in a magnetic ﬁeld.
Page 364 Assembly Descriptions and Block Diagrams RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers The A7 analog interface assembly controls the center frequency of the YTO: • The YTO tune DACs in the A7 YTO driver circuitry determine the center frequency of the YTO.
Page 365: Rf And Lo Section For 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, And 8596E Analyzers
Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers The 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E analyzer RF and LO section includes the following assemblies: •...
Page 366 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers Band Frequency Analyzer Range Model 9 kHz to 2.9 GHz 8592L, 93E, 94E, 94L, 94Q, 95E, 96E 2.75 to 6.5 GHz 8592L, 93E, 95E, 96E 6.0 to 12.8 GHz 8592L, 93E, 96E...
Page 367 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers The LO section provides a 3.0 to 6.8214 GHz ﬁrst LO, a 600 MHz second LO, a 300 MHz third LO, a 300 MHz CAL OUT signal, and an IF frequency counter.
Page 368 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers A9 Third Converter Assembly The A9 Third Converter performs the following functions: • Down-converts the 321.4 MHz IF to the ﬁnal 21.4 MHz IF. •...
Page 369 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers The buffered 21.4 MHz IF signal is ampliﬁed in the IF calibration ampliﬁer (IF Cal Amp). The gain of the calibration ampliﬁer is controlled by a DAC on the A7 analog interface assembly via the REF_LVL_CAL control line.
Page 370 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers The stabilizer mixes the divided sampler IF (nominally 8.25 MHz) with the 7.5 MHz, and feeds the difference signal into the discriminator. The discriminator output, DISCRIM, is fed back to the A7 analog interface assembly to tune the A3A7 YTO precisely to the center frequency.
Page 371 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers Tracking Oscillator The tracking oscillator enables the ﬁne adjustment of the tracking generator output frequency to compensate for the frequency inaccuracies of the analyzer 21.4 MHz IF. The tracking oscillator determines the residual FM and frequency drift of the tracking generator.
Page 372 Assembly Descriptions and Block Diagrams RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Analyzers Output Ampliﬁer The output ampliﬁer ﬁlters the signal emerging from the output mixer and then ampliﬁes it into a usable range. The ampliﬁer also contains a detector for leveling the output.
Page 373: If Section
Assembly Descriptions and Block Diagrams IF Section IF Section This section applies to all 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers, and describes the operation of the IF section assemblies and the A16 processor/video assembly.
Page 374 Assembly Descriptions and Block Diagrams IF Section A12 Amplitude Control The A12 amplitude control assembly provides gain or attenuation in eight stages: three step-gain ampliﬁers and ﬁve step attenuators. All stages, except the 10 dB step gain, provide full gain or attenuation when turned on and unity gain when turned off.
Page 375 Assembly Descriptions and Block Diagrams IF Section A14 Log Ampliﬁer The A14 log ampliﬁer assembly provides the following functions: • Log Mode. The input signal is logarithmically displayed due to the sequential response of seven log ampliﬁer stages. The log ampliﬁer stages have an overall range of 70 dB. This allows a greater range of signal amplitudes to be simultaneously displayed.
Page 376 Assembly Descriptions and Block Diagrams IF Section • Final processing of the detected 21.4 MHz IF signal before the video signal is converted by the ADC for further digital processing by the central processing unit (CPU). Video bandwidths from 30 Hz to 3 MHz are available in a 1, 3, 10 sequence.
Page 377 Assembly Descriptions and Block Diagrams IF Section A7 Analog Interface The A7 analog interface assembly converts the digital commands from the A16 assembly to analog control signals for the following assemblies shown on Figure 9-1: • DAC control of the A11/A13 bandwidth ﬁlter assemblies. Refer to “Replacing Major Assemblies”...
Page 378 Assembly Descriptions and Block Diagrams IF Section • A14 log ampliﬁer assembly. The A7 assembly controls two functions on the A14 assembly: Log/linear mode switching. A temperature-compensated control bias voltage switches the seven A14 ampliﬁer stages to function as either linear ampliﬁers or logging ampliﬁers. 10 dB linear step gains.
Page 379 Assembly Descriptions and Block Diagrams IF Section Refer to the “A130 Narrow Bandwidth Assembly” section of Foldout 11-1. The narrow bandwidth assembly is inserted into one of the four card-cage slots. The narrow bandwidth assembly receives the 21.4 MHz AUX_IF from the A15 motherboard. The AUX_IF signal is available to all the card-cage assemblies.
Page 380 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 382 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 384 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 386 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 388 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 390 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 392 Assembly Descriptions and Block Diagrams IF Section Chapter 9...
Page 393: Analyzer Options And Block Diagrams
Analyzer Options and Block Diagrams...
Page 394: Analyzer Options And Block Diagrams
Analyzer Options and Block Diagrams Analyzer Options and Block Diagrams Analyzer Options and Block Diagrams Many options are available to enhance the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers. Option descriptions are listed numerically in this chapter, and a table provides information on which options are available with your analyzer.
Page 395 Analyzer Options and Block Diagrams Analyzer Options and Block Diagrams Table 10-1 Option Table Option 75 Ohm Input • • Memory Card Reader • • • Precision Freq Reference • • • LO/Sweep+Tune Out • • Tracking Generator • • •...
Page 396 Analyzer Options and Block Diagrams Analyzer Options and Block Diagrams Table 10-1 Option Table (Continued) Option Digital Demod • • • NADC ROMs • • • Fast ADC/TV SYNC/AM-FM • • • Demod DIRTS • PAL Secam Disp • • NTSC TV Display •...
Page 397: Option Descriptions
Analyzer Options and Block Diagrams Option Descriptions Option Descriptions 75Ω Input Impedance (Option 001) For 8590L and 8591E only. This option provides a 75Ω input impedance instead of the standard 50Ω impedance. analyzers with this option use cables, circuit boards, and front panels that are different from the standard units.
Page 398 Analyzer Options and Block Diagrams Option Descriptions 8593E, 8594E, 8595E, and 8596E: Option 010 is also available, with factory installation (Option K10) after the purchase of your analyzer. For 8590L and 8591E only. Option 010 (100 kHz to 1.8 GHz) or 011 (1 MHz to 1.8 GHz) provides a built-in tracking generator.
Page 399 Analyzer Options and Block Diagrams Option Descriptions Option 041 allows the analyzer to copy its screen to a printer or plotter, and includes a separate connector that accepts programming commands from an external keyboard. Option 041 is also available as a retroﬁt kit (Option R41) after the purchase of your analyzer, or as a kit part number 08590-60380.
Page 400 Analyzer Options and Block Diagrams Option Descriptions The extended frequency speciﬁcations only apply when using the NOTE Type-N to SMA adaptor that is supplied with the option. Front Panel Protective Cover (Option 040) The impact cover assembly snaps onto the front of your analyzer to protect the front panel during travel and when the unit is not in use.
Page 401 Analyzer Options and Block Diagrams Option Descriptions Improved Amplitude Accuracy for PHS (Option 052) For 8593E, 8594E, 8595E, and 8596E only. Improved amplitude accuracy for PHS. This is an amplitude calibration that improves speciﬁcations to ±0.5 dB at 20-30 °C for the PHS frequency band in the 1895 to 1918 MHz frequency range.
Page 402 Analyzer Options and Block Diagrams Option Descriptions AM/FM Demodulator with Speaker and TV Sync Trigger Circuitry (Option 102) For 8591E, 8593E, 8594E, 8595E, and 8596E only. Option 102 enables you to use amplitude or frequency demodulation and to listen to a demodulated signal.
Page 403 Analyzer Options and Block Diagrams Option Descriptions CT2 Demodulator (Option 110) For 8591E, 8593E, 8594E, 8595E, and 8596E only. Option 110 provides built-in demodulation capability for making CT2 transmitter measurements. It must be used with the 85717A CT2-CAI measurements personality to make frequency deviation measurements on CT2 cordless telephone handsets and bases.
Page 404 Analyzer Options and Block Diagrams Option Descriptions Narrow Resolution Bandwidths and Precision Frequency Reference (Option 140) For 8591E, 8593E, 8594E, 8595E, and 8596E only. This option is a combination of Option 130 and Option 004. Option 140 provides additional narrow resolution bandwidths of 30 Hz, 100 Hz, and 300 Hz. These bandwidths improve sensitivity and allow you to resolve closely spaced signals.
Page 405 Analyzer Options and Block Diagrams Option Descriptions Option 160 implements a coherent downconversion, and calculates the minimum RMS error vector magnitude of a timeslot. Carrier frequency error and I-Q origin offset are also extracted from sampled data. Option 151 with Option 160 and the 85718B NADC-TDMA measurements personality provide a complete NADC transmitter RF measurement solution including modulation metrics.
Page 406 An additional copy of the 8590 E-Series and L-Series Spectrum Analyzers User's Guide, the 8590 E-Series and L-Series Spectrum Analyzers Quick Reference Guide, and the 8590 Series Analyzers Calibration Guide of the appropriate model number for your analyzer, are available as a set under Option 910.
Page 407 Analyzer Options and Block Diagrams Option Descriptions Service Documentation (Option 915) Option 915 provides one copy of the assembly-level repair service guide and one copy of the component-level repair service guide. The assembly-level repair service guide describes assembly level troubleshooting procedures and adjustment procedures. The component-level repair service guide includes parts lists, component-location diagrams, and schematic diagrams for selected repairable assemblies.
Page 408: Troubleshooting Analyzer Options
Analyzer Options and Block Diagrams Troubleshooting Analyzer Options Troubleshooting Analyzer Options This section provides information to aid in troubleshooting options installed in the 8590 Series analyzers. Tracking Generator 8590L, 8591C, and 8591E Option 010, 011 Refer to Figure 10-1, Tracking Generator Block Diagram, for an overview of operation for the tracking generator and its connection to the standard analyzer.
Page 409 Analyzer Options and Block Diagrams Troubleshooting Analyzer Options The tracking generator bias voltages from A7A1 tracking generator control board assembly to the A24A2 tracking converter are described in the table below. Table 10-3 Tracking Generator Bias Voltages from A7A1 to A24A2 Source Brown Blue...
Page 410: Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010
Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 The following troubleshooting information is aimed at isolating tracking-generator-related faults to either the A3A15 tracking generator assembly or one of the other supporting assemblies, such as A9, A10, or A3A14.
Page 411 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 3. Check maximum power available from the tracking generator. Connect the RF OUT 50Ω connector to the INPUT 50Ω connector. Press the following keys. PRESET , 20, AMPLITUDE +dBm , 5,...
Page 412 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 6. Place the A3 front end assembly in its service position. Place the A3A15 tracking generator assembly in its service position. Disconnect W41 from A3A15J4 (LO IN). Connect the power sensor to the free end of W41.
Page 413 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 To check excessive residual FM Either the tracking oscillator or the ALC circuitry could be responsible for excessive residual FM. The residual FM should be measured on another analyzer, such as an 8566A/B or 8568A/B, using slope detection with the analyzer set to zero span.
Page 414 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 If ﬂatness is out of tolerance The output level ﬂatness of the tracking generator is speciﬁed at a −1 dBm output power setting. In general, most ﬂatness problems will be a result of a failure in the A3A15 Tracking Generator microcircuit.
Page 415 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 If vernier accuracy is out of tolerance Vernier accuracy is a function of the PWR_LVL drive signal from the A10 tracking generator control assembly and the ALC circuitry on A3A15.
Page 416 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 If harmonic/spurious outputs are too high Harmonic and spurious outputs may be generated by A3A15 itself or may be present on either the 600 MHz drive or 1st LO drive signal. There is a direct relationship between spurious signals on the 1st LO and spurious signals on the tracking generator output.
Page 417 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 The 600 MHz drive signal should be −8 dBm ±3.5 dB. The 1st LO signal NOTE should be +16 dBm ±2 dB. If power sweep is not functioning properly Power sweep is accomplished by summing an attenuated SWEEP RAMP signal with the PWR_LVL signal.
Page 418 Analyzer Options and Block Diagrams Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 If there is no output power The A3A15 assembly requires power supplies, a 1st LO signal, and a 600 MHz drive signal in order to provide power output. 1.
Page 419: First Lo Distribution Amplifier (Loda) 8593E, 8594E, 8594Q, 8595E, 8596E
Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 The following troubleshooting information is aimed at isolating 1st LO amplitude-related faults to either the A3A14 LODA assembly, A10 Tracking Generator Control assembly, or the A3A7 YTO assembly.
Page 420 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 10.The voltage measured on the DVM should be greater than +14 Vdc. 11.Move the jumper from +10 VR to −10 VR (refer to the A10 schematic).
Page 421 The 8594Q Option 190 DVB-C QAM analyzer is a complex instrument CAUTION to troubleshoot. It is recommended that the following troubleshooting procedures be performed by an approved Agilent Technologies service center only. This information is divided into two sections. • Troubleshooting Tree •...
Page 422 8594Q analyzer troubleshooting platform is the same procedure documented in the as an 8594E 8590 Series Analyzers Assembly-Level spectrum analyzer. Repair Service Guide. If the failure is in an Check the list of spectrum analyzer Option 190 speciﬁc test under...
Page 423 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 1: Spectrum Analyzer Platform vs Option 190 IS THE PROBLEM A SPECTRUM ANALYZER PLATFORM OR OPTION 190 PROBLEM? (Continued) Comments Problems/Reasons Diagnostic/Fix Action Spectrum One or more power supply Detach and remove the Option 190 card...
Page 424 Option 190 problem. If it fails, follow the typical 8594Q troubleshooting procedure documented in the 8590 Series Analyzers Assembly-Level Repair Service Guide. Signal level is too high or too If the QAM analyzer has a problem in low at the 321.4 MHz tap...
Page 425 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 2: Internal Preampliﬁer IS THE PROBLEM IN THE 8594Q QAM ANALYZER INTERNAL PREAMPLIFIER? Comments Problems/Reasons Diagnostic/Fix Action Internal No signal on screen Refer to “Set up to use the Preampliﬁer Preampliﬁer”...
Page 426 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 3: Option 190 HOW DO I CHECK THE BASIC CONFIGURATION? Comments Problems/Reasons Diagnostic/Fix Action The Option 190 consists of three Access the option listing under card-cage option cards, DSP Show Options.
Page 427 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 4: EVM Problems IS THE FAILURE IN A SINGLE CHANNEL BANDWIDTH? Comments Problems/Reasons Diagnostic/Fix Action If the problem is concentrated in a Replace the suspected RF board single-channel bandwidth setting, assembly with a “known”...
Page 428 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 4: EVM Problems IS THE FAILURE IN A SINGLE CHANNEL BANDWIDTH? Comments Problems/Reasons Diagnostic/Fix Action IS THE FAILURE WITH THE PREAMPLIFIER “ON” ONLY? The test conditions with the •Evaluate the preampliﬁer.
Page 429 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 4: EVM Problems IS THE FAILURE IN A SINGLE CHANNEL BANDWIDTH? Comments Problems/Reasons Diagnostic/Fix Action Connector The MCX connectors used on the Inspect both the female connector Problems gray cables on the option cards...
Page 430 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 4: EVM Problems IS THE FAILURE IN A SINGLE CHANNEL BANDWIDTH? Comments Problems/Reasons Diagnostic/Fix Action Failures can appear The problem is in the main 1.
Page 431 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 5: Average Power Test Problems IS THE TEST SIGNAL AT THE PROPER LEVEL? Comments Problems/Reasons Diagnostic/Fix Action Test Signal Level The test signal comes from the View the spectrum on a spectrum 8770 arbitrary waveform analyzer screen.
Page 432 Analyzer Options and Block Diagrams First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E Option 009 TREE 5: Average Power Test Problems IS THE TEST SIGNAL AT THE PROPER LEVEL? Comments Problems/Reasons Diagnostic/Fix Action Preamplifer ON If the problem appears with the 1.
Page 433: Option 190 Dvb-C Connection Diagram
Analyzer Options and Block Diagrams Option 190 DVB-C Connection Diagram Option 190 DVB-C Connection Diagram Chapter 10...
Page 434: Option 190 Dvb-C Service Menus
Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Option 190 DVB-C Service Menus Service menus are available in the 8594Q Option 190 DVB-C QAM analyzer and are intended to assist in troubleshooting problems speciﬁc to the Option 190. These service menus can only be enabled using a passcode.
Page 435 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Menu 1 of 3 enables the display of the diagnostics data on DIAGS ON OFF demod-based measurements along with the measurement results. This data is shown as a small highlighted block on the screen. The exact meaning of each of the data items is detailed in the “Diagnostic Data”...
Page 436 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus leads to a set of menus that allows the setup of various Dncvtr Test Option 190 downconverter functions in a manner convenient to troubleshooting, for example, no measurements are run. The softkeys located under are documented in the “Downconverter Test”...
Page 437 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Menu 3 of 3 (when set to OFF) allows you to disable the COUPLING ON OFF automatic selection of channel bandwidth when a new channel is entered. This may be used if you want to ignore the FTZ `D' channel layout while using `D' channels.
Page 438 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Diagnostic Data When in the is set to ON, demod-based DIAGS ON OFF Service Menus measurements will include the display of extra diagnostic data in a small highlighted block on the screen. The format is: XX dB YY,Z ABCD where: XX is the amount of dB set on the Option 190 downconverter assembly after the automatic level setting algorithm has run.
Page 439 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus 5: The second AGC reading in case 2 or 4 above indicated adjustment was required and the amount of excess attenuation was 12 dB or more (for example, the cumulative amount of attenuation decrease would be 24 dB or more).
Page 440 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Downconverter Test in the leads to a set of menus used to Dncvrtr Test Service Menus troubleshoot Option 190 RF Downconverter boards. Note that pressing it also sets up the analyzer for 0 span and routes the signal path to Option 190 board set instead of the spectrum analyzer.
Page 441 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus For the 8 MHz channels, R=50, B=38 and A=1 which yields 243.4 MHz. For the 4 MHz channels, R=35, B=27 and A=0 which yields 246.85 MHz. For the 2 MHz channels, R=49, B=38 and A=2 which yields 246.571 MHz.
Page 442 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus IQ Constellation in the Service menus is set to ON, a SHOW KEYS ON OFF Service will be present in the IQ Constellation menu. All the keys on this menu are duplicates (for convenience) of keys under Service Service menus discussed in the menu sections, except .
Page 443 8591C & 8591E ONLY FOLDOUT 10-1. 8590L/91C, 91E TRACKING GENERATOR OPTION 010 AND 011, OVERALL BLOCK DIAGRAM...
Page 444 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Chapter 10...
Page 446 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Chapter 10...
Page 448 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Chapter 10...
Page 450 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Chapter 10...
Page 451 8594Q OPTION 190 HARDWARE BLOCK DIAGRAM SPECTRUM ANALZYER 321.4 MHz A3A18 INPUT 50 BASEBAND DETECTOR 0-70 dB A3A17 ATTN 10 dB STEP AT 300 MHz 3-6.8 GHz 3.6 GHz G=+23 +3dB NF= 7 dB A190A1 RF A190A2 DEMOD CLOCK DATA TO FEC FILTER 4x SYMBOL...
Page 452 Analyzer Options and Block Diagrams Option 190 DVB-C Service Menus Chapter 10...
Page 453: Major Assembly And Cable Locations
Major Assembly and Cable Locations The various assemblies and cables of the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers are illustrated in this chapter. Refer to Chapter 12 for part numbers, assembly descriptions, and ordering information.
Page 454: Major Assembly And Cable Locations
Major Assembly and Cable Locations Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-1 A1 Front-Frame Assembly, Front and Rear Views 8590 E-Series and L-Series Spectrum Analyzers, 8591C Cable TV Analyzer, and 8594Q QAM Analyzers Chapter 11...
Page 455 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-2 Instrument Top View 8590L, 8591C, and 8591E Chapter 11...
Page 456 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-3 Instrument Top View 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Chapter 11...
Page 457 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-4 A7A1 Left-Side View 8590L, 8591C, and 8591E Chapter 11...
Page 458 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-5 Card-Cage (Options 102, 103) 8590 E-Series, 8591C Cable TV Analyzers, and 8594Q QAM Analyzers Chapter 11...
Page 459 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-6 Figure 11-6 Card-Cage (Options 009, 010) 8593E, 8594E, 8594Q, 8595E, and 8596E Chapter 11...
Page 460 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-7 Card-Cage (Option 103) 8590 E-Series Chapter 11...
Page 461 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-8 Card-Cage (Option 107) 8591C and 8590 E-Series Chapter 11...
Page 462 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-9 Card-Cage (Option 190) 8594Q Chapter 11...
Page 463 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-10 Instrument Bottom View with A25 Counter-Lock Removed 8590 E-Series and L-Series Spectrum Analyzers, 8591C Cable TV Analyzer, and 8594Q QAM Analyzers Chapter 11...
Page 464 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-11 Instrument Bottom View 8590 E-Series and L-Series Spectrum Analyzers, 8591C Cable TV Analyzers, and 8594Q QAM Analyzers Chapter 11...
Page 465 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-12 Front-End Assembly, Top View 8590L and 8591E Figure 11-13 Front-End Assembly, Left-Side View 8590L and 8591E Chapter 11...
Page 466 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-14 Front-End Assembly, Top View 8591C Figure 11-15 Front-End Assembly, Left-Side View 8591C Chapter 11...
Page 467 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-16 YTO Assembly 8590L, 8591C, and 8591E Chapter 11...
Page 468 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-17 A24 Tracking Generator 8590L (Options 010 and 011) Chapter 11...
Page 469 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-18 A24 Tracking Generator 8591C (Option 011) and 8591E (Options 010 and 011) Chapter 11...
Page 470 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-19 A3 Front-End Assembly, Top and Left-Side Views 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E Chapter 11...
Page 471 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-20 A3 Front-End Assembly, Right-Side View 8592L Chapter 11...
Page 472 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-21 A3 Front-End Assembly, Right-Side View 8593E Chapter 11...
Page 473 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-22 Figure 11-22 A3 Front-End Assembly, Right-Side View 8594E and 8594L Chapter 11...
Page 474 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-23 A3 Front-End Assembly, Right-Side View 8595E and 8596E Chapter 11...
Page 475 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-24 A3 Front-End Assembly, Rear View with A3A5 Removed 8592L and 8593E (Options 009 and 010) Chapter 11...
Page 476 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-25 A3 Front-End Assembly, Rear View with A3A5 Removed 8594E (Options 009 and 010) Chapter 11...
Page 477 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-26 A3 Front-End Assembly, Rear View with A3A5 Removed 8595E and 8596E (Options 009 and 010) Chapter 11...
Page 478 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-27 A3 Front-End Assembly, Right-Side View 8593E (Options 009 and 010) Chapter 11...
Page 479 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-28 A3 Front-End Assembly, Right-Side View 8594E (Options 009 and 010) Chapter 11...
Page 480 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-29 A3 Front-End Assembly, Right-Side View 8595E and 8596E (Options 009 and 010) Chapter 11...
Page 481 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-30 A3 Front-End Assembly, Rear View with A3A5 Removed 8593E (Options 009 and 010) Chapter 11...
Page 482 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-31 A3 Front-End Assembly, Rear View with A3A5 Removed 8594E (Options 009 and 010) Chapter 11...
Page 483 Major Assembly and Cable Locations Major Assembly and Cable Locations Figure 11-32 A3 Front-End Assembly, Rear View with A3A5 Removed 8595E and 8596E (Options 009 and 010) Chapter 11...
Page 484 Major Assembly and Cable Locations Major Assembly and Cable Locations Chapter 11...
Page 485: Replaceable Parts
Replaceable Parts This chapter contains information for identifying and ordering replacement assemblies for the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers. Each assembly applies to all 8590 E-Series and L-Series spectrum analyzers, except where speciﬁed with the applicable analyzer models.
Page 486: Replaceable Parts
The parts lists, schematics, and component-location diagrams for NOTE the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers board assemblies are available separately in the 8590 Series Analyzers Component-Level Repair Service Guide. Chapter 12...
Page 487: Ordering Information
To order an assembly or mechanical part listed in this chapter: 1. Determine the Agilent Technologies part number. 2. Determine the quantity required. 3. Mail this information to the nearest Agilent Technologies sales and service ofﬁce. Refer to Chapter 8 for information about sales and service ofﬁces.
Page 488 Replaceable Parts Ordering Information Direct Mail-Order System Within the USA, Agilent Technologies can supply parts through a direct mail-order system. Advantages of using the system are as follows: • Direct ordering and shipment from Agilent Technologies. • No maximum or minimum on any mail order. (There is a minimum order amount for parts ordered through a local Agilent Technologies ofﬁce when the orders require billing and...
Page 489 Replaceable Parts Ordering Information Table 12-1 Reference Designations REFERENCE DESIGNATIONS Assembly Fuse Thermistor Attenuator, Filter Switch Isolator, Circulator Transformer Limiter, Termination Fan, Motor Electrical Terminal Board Connector Battery Thermocouple (Stationary Capacitor Test Point Portion), Jack Coupler Relay Integrated Circuit, Diode, Diode Coil, Inductor Microcircuit Thyristor, Step...
Page 490 Replaceable Parts Ordering Information Abbreviations Across Flats, Acrylic, Air (Dry Method), Amper Adjust, Adjustment ANSI American National Standards Institute (formerly USASI-ASA) ASSY Assembly American Wire Gage Binary Coded Decimal Board, Bundle BE-CU Beryllium Copper Type of Connector Bearing, Boring Brass Basic Button Capacitance, Capacitor, Center Tapped, Cermet,...
Page 491 Replaceable Parts Ordering Information Current Gain Bandwidth Product (Transition Frequency), Feet, Foot JFET Junction Field Effect Transistor Double DCDR Decoder Degree D-HOLE D-Shaped Hole Diameter Dual In-Line Package DIP-SLDR Dip Solder D-MODE Depletion Mode Package Type Designation Deep, Depth, Dia-metric Pitch, Dip DP3T Double Pole Three Throw DPDT...
Page 492 Replaceable Parts Ordering Information Henry, High Hexadecimal, Hexagon, Hexagonal Hardware HLCL Helical High Pass Collector Current, Integrated Circuit Identiﬁcation,Inside Diameter Forward Current, Intermediate Frequency Inch INCL Including Integral, Intensity, Internal J-FET Junction Field Effect Transistor Kelvin, Key, Kilo, Potassium KNRLD Knurled KVDC Kilovolts, Direct Current...
Page 493 Replaceable Parts Ordering Information Momentary Mounting MTLC Metallic Milliwatt Nano, None N-CHAN N-Channel Nanohenry Nanometer, Nonmetallic Normally Open, Number Nominal Negative Positive Negative (Transistor) Nanosecond, Non-Shorting, Nose Numeric Nylon (Polyamide) Over-All Outside Diameter OP AMP Operational Ampliﬁer Optical, Option, Optional Picoampere, PowerAmpliﬁer PAN-HD Pan Head...
Page 494 Replaceable Parts Ordering Information POLYE Polyester Potentiometer POZI Pozidriv Recess PREC Precision Purple, Purpose PSTN Piston Part, Point, Pulse Time Pulse Width Figure of Merit Range, Red, Resistance, Resistor, Right, Ring Reference Resistance, Resistor Radio Frequency Rigid Round Rear Rivet, Riveted SAWR Surface Acoustic Wave Resonator Segment...
Page 495 Replaceable Parts Ordering Information SUBMIN Subminiature Size Teeth, Temperature, Thickness, Time, Timed, Tooth, Typical Ambient Temperature, Tantalum Temperature Coefﬁcient Thread, Threaded Thick Package Type Designation Tapping TR-HD Truss Head TRMR Trimmer Turn, Turns TRSN Torsion Microcandela Microfarad Microhenry Microliter, Underwriters' Laboratories, Inc. UNHDND Unhardened Variable, Violet, Volt, Voltage...
Page 496 Replaceable Parts Ordering Information MULTIPLIERS Abbreviation Preﬁx Multiple Abbreviation Preﬁx Multiple −3 tera milli µ −6 giga micro −9 mega nano −12 kilo pico −15 deka femto −1 −18 deci atto −2 centi Chapter 12...
Page 497: Standard-Value Replacement Components
Replaceable Parts Standard-Value Replacement Components Standard-Value Replacement Components Table 12-2 Standard Value Replacement Capacitors Capacitors Type: Tubular Type: Dipped Mica Range: 1 to 24 pF Range: 27 to 470 pF Tolerance: 1 to 9.1 pF = ±0.25 pF Tolerance: ±5% 10 to 24 pF = ±5% Value (pF) Part...
Page 498 Replaceable Parts Standard-Value Replacement Components Table 12-3 Standard Value Replacement Resistors, 0.125 W Resistors Type: Fixed-Film Range: 10Ω to 464 KΩ Wattage: 0.125 at 125°C Tolerance: ±1.0% Value (Ω) Part Value (Ω) Part Number Number 10.0 0757-0346 0698-3447 11.0 0757-0378 0698-0082 12.1 0757-0379...
Page 499 Replaceable Parts Standard-Value Replacement Components Table 12-3 Standard Value Replacement Resistors, 0.125 W (Continued) Resistors Type: Fixed-Film Range: 10Ω to 464 KΩ Wattage: 0.125 at 125°C Tolerance: ±1.0% Value (Ω) Part Value (Ω) Part Number Number 9.09K 0698-3441 0757-0288 10.0K 0698-3442 0757-0442 11.0K...
Page 500 Replaceable Parts Standard-Value Replacement Components Table 12-4 Standard Value Replacement Resistors, 0.5 W Resistors Type: Fixed-Film Range: 10Ω to 1.47 MΩ Wattage: 0.5 at 125°C Tolerance: ±1.0% Value (Ω) Part Value (Ω) Part Number Number 10.0 0757-0984 0698-3404 11.0 0575-0985 0698-3405 12.1 0757-0986...
Page 501 Replaceable Parts Standard-Value Replacement Components Table 12-4 Standard Value Replacement Resistors, 0.5 W (Continued) Resistors Type: Fixed-Film Range: 10Ω to 1.47 MΩ Wattage: 0.5 at 125°C Tolerance: ±1.0% Value (Ω) Part Value (Ω) Part Number Number 8.25K 0698-3401 0757-0837 9.09K 0698-3102 0757-0838 10.0K...
Page 502 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts Reference Description Part Designator Number A1A1 Keyboard All 8590 E-Series and L-Series spectrum analyzers, 08590-60201 8591C cable TV analyzers, and 8594Q QAM analyzers A1A2 Rotary Pulse Generator All 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers Old Style 0960-0745...
Page 503 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number A3A4 Second Converter 8592L, 8593E, 8594E, 8594L, 8594Q, 5086-7958 8595E, and 8596E A3A5 Input Attenuator 8592L and 8593E 33321-60039 8592L and 8593E, (Options 026 and 027) 33321-60038 33321-60036 8594E, 8594L, 8594Q, and 8595E...
Page 504 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number A3A13 Isolator 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, 0955-0204 and 8596E A3A14 LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8595E, and 8596E 5086-7744 A3A15 Tracking Generator 8593E, 8594E, 8595E, and 8596E 5086-7917 Tracking Generator Exchange...
Page 505 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number Analog Interface 8590L and 8591E 08590-60197 8591C 08591-60072 8592L and 8593E 08592-60108 8594E, 8594L, and 8594Q 08594-60030 8595E and 8596E 08595-60022 A7A1 Tracking Generator Control 8590L, 8591C, and 8591E 08590-60196 Power Supply...
Page 506 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number Bandwidth Board All 8590 E-Series and L-Series spectrum 08590-60398 analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers Log Ampliﬁer Board All 8590 E-Series and L-Series spectrum 08590-60386 analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers...
Page 507 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number Tracking Generator RF (Includes A24A1 through A24FL1) 8590L, 8591C, and 8591E A24A1 Tripler 8590L, 8591C, and 8591E 5086-7807 A24A2 Tracking Converter 8590L, 8591C, and 8591E 08590-60146 A24A3 Ampliﬁer/Detector...
Page 508 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number RS-232 and Parallel Interface Board All 8590 E-Series and L-Series spectrum analyzers 08590-60366 and 8591C cable TV analyzers and 8594Q QAM analyzers (Option 043) A41A1 RS-232 and Parallel Interface Connector All 8590 E-Series and L-Series spectrum analyzers...
Page 509 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number A151 Down Converter Assembly 8591E, 8593E, 8594E, 8595E, and 8596E (Option 151) 5062-8246 A160 DSP Assembly 8591E, 8593E, 8594E, 8595E, and 8596E (Option 160) 5062-8245 without ﬁrmware 8591E, 8593E, 8594E, 8595E, and 8596E (Option 160)
Page 510 Replaceable Parts Standard-Value Replacement Components Table 12-5 Assembly-Level Replaceable Parts (Continued) Reference Description Part Designator Number Low-Pass Filter 4.4 GHz 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, 0955-0519 and 8596E Low-Pass Filter 4.9 GHz 8590L, 8591C, and 8591E 9135-0048 Input 50 Ω 8590L, 8591E, 8594E, 8594L, and 8594Q 1250-2191 8592L, 8593E, 8595E, and 8596E...
Page 511 Replaceable Cables Reference Description Part Number Designator CABLE ASSY WITH LINE SWITCH, A1 TO A16J9 All 8590 Series analyzers 5062-4809 CABLE ASSY, DISPLAY VIDEO, A2 TO A16J8 All 8590 -Series analyzers 5063-0602 CABLE ASSY, INTENSITY, WITHOUT POTENTIOMETER, A1R1 TO A2...
Page 512 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, RF INPUT, J1 TO A3 8590L and 8591E 08590-20157 8590L and 8591E (75 Ω input) 08590-20182 8591C 08591-20058 CABLE ASSY, RF INPUT, J1 TO A3A5J1 08592-20056 8592L, 8593E, 8594E, 8594L, 8594Q, 8595E, and 8596E...
Page 513 5063-0206 8595E 5062-7787 8596E CABLE ASSY, COUNTER LOCK/MEMORY CARD CONTROL, A16J2 TO A17J1/A25J4 All 8590 Series analyzers except 8590L with Option 713 8120-5535 CABLE ASSY, PRECISION FREQUENCY REFERENCE POWER, A25J3 TO A22 All 8590 E-Series and L-Series spectrum analyzers, 5063-0204...
Page 514 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, 300 MHz COUNT LOCK DRIVE, A9J3 TO A25J1 8590L, 8591C, 8591E, 8592L, 08591-60010 8593E, 8595E, and 8596E CABLE ASSY, FIRST CONVERTER OUTPUT, A4J3 TO FL1 8590L and 8591E 08590-20203...
Page 515 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, 707 MHz, A7A1J6 TO A24A1J1 8590L and 8591E 08590-60131 CABLE ASSY, YTF INPUT, A3A2 TO A3A8J1 8592L and 8593E 08592-20068 8592L and 8593E (Options 026 and 027) 08592-20069 CABLE ASSY, TG TRIPLER OUTPUT, A24A1J2 TO A24A2J1...
Page 516 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, LPF/AMPLIFIER, A24FL1 TO A24A3J1 8590L AND 8591E (Option 010) 08590-20186 CABLE ASSY, FIRST MIXER LOW BAND, A3A6J2 TO FL1J1 08593-20011 8592L, 8593E, 8595E, and 8596E 08594-20011 8594E, 8594L, and 8594Q CABLE ASSY, LPF OUTPUT, FL1J2 TO A3A4J1...
Page 517 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, TRACKING GENERATOR POWER 8590L, 8591C, AND 8591E 08590-60143 CABLE ASSY, DIR. CPLR. OUTPUT, A3A10 TO A3A6J4 08592-20065 8593E, 8594E, 8594L, 8595E, and 8596E CABLE ASSY, LODA TO DUAL MIXER, A3A14J2 TO A3A6J4 08593-20003...
Page 518 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator CABLE ASSY, FIRST LO, A3A14J3 TO ASA15J4 8593E, 8594E, 8595E, and 8596E (Option 010) 08593-20002 CABLE ASSY, FIRST LO OUTPUT, A3A15J3 TO REAR PANEL 8593E, 8594E, 8595E, and 8596E (Options 009 and 010) 5062-7710 CABLE ASSY, TG OUT, A3A16 TO J3 8593E, 8594E, 8595E, and 8596E (Option 010)
Page 519 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator W130 CABLE ASSY, A130 TO A14 8591C, 8591E, 8593E, 8594E, 8120-5020 8595E, and 8596E (Option 130) W131 CABLE ASSY, A130 TO A15J200 8591C, 8591E, 8593E, 8594E, 8120-5030 8595E, and 8596E (Option 130) W132...
Page 520 Replaceable Parts Standard-Value Replacement Components Table 12-6 Replaceable Cables (Continued) Reference Description Part Number Designator W191 CABLE ASSY, RED, A190A1 PORT B TO A190A2 PORT B 8594Q (Option 190) 8120-6990 W192 CABLE ASSY, VIOLET, A190A1 PORT C TO A190A2 PORT C 8594Q (Option 190) 8120-6990 W193...
Page 521: Component-Level Information Packets
CLIP information. A complete set of CLIPs can be obtained by ordering the 8590 Series Analyzers Component-Level Repair Service Guide. Updated or replacement CLIPs may be ordered through your local Agilent Technologies Sales or Service ofﬁce using the CLIP part...
Page 522 Replaceable Parts Component-Level Information Packets Table 12-7 8590 E-Series and L-Series Spectrum Analyzer Board Assembly, Serial Number, and CLIP Part Number Cross-Reference Assembly Instrument Board CLIP Serial Preﬁx Assembly Part Number Part Number A1A1 Keyboard All serials 08590-90204 08590-60201 A3A1A1 Comb All serials 08590-90132 08569-60026...
Page 523 Replaceable Parts Component-Level Information Packets Table 12-7 8590 E-Series and L-Series Spectrum Analyzer Board Assembly, Serial Number, and CLIP Part Number Cross-Reference Assembly Instrument Board CLIP Serial Preﬁx Assembly Part Number Part Number 8591C Serial Preﬁx 08590-90223 08590-60344 3325A 8591E Serial Preﬁx 08591-90120 08591-60081...
Page 524 Replaceable Parts Component-Level Information Packets Table 12-7 8590 E-Series and L-Series Spectrum Analyzer Board Assembly, Serial Number, and CLIP Part Number Cross-Reference Assembly Instrument Board CLIP Serial Preﬁx Assembly Part Number Part Number A15 Motherboard 8590L, 8592L, and Serial Preﬁx 08590-90217 08590-60218 8594L...
Page 525 Replaceable Parts Component-Level Information Packets Table 12-7 8590 E-Series and L-Series Spectrum Analyzer Board Assembly, Serial Number, and CLIP Part Number Cross-Reference Assembly Instrument Board CLIP Serial Preﬁx Assembly Part Number Part Number All others Serial Preﬁx 08591-90119 08591-60073 3249A Serial Preﬁx 08591-60061 3324A...
Page 526 Replaceable Parts Component-Level Information Packets Figure 12-1 Handle Assembly Parts Identiﬁcation Item Part Number Description HANDLE 5041-8992 TRIM CAP 5041-8912 SCREW-MACH M4×0.7 10MM-LG PAN-HD 0515-1114 SPRING-CPR 1460-2164 5021-6343 RING GEAR SOCKET GEAR 5021-6344 HANDLE PLATE 5021-8667 BACKUP PLATE 5001-8728 SCREW-MACH M4×0.7 8MM-LG FLH-HD 0515-1367 SCREW-MACH M5×0.8 16MM-LG 0515-1133...
Page 527 Replaceable Parts Component-Level Information Packets Figure 12-2 Cover Assembly Parts Identiﬁcation Item Part Number Description COVER ASSEMBLY 08590-60378 COVER 08590-00070 SCREW-MACH M4×0.7 10MM-LG PAN-HD 0515-1114 REAR FOOT 5041-8907 0900-0024 O-RING .145-IN-ID .07-IN-XSECT-DIA SIL WASHER-LK HLCL 5.0 MM 5.1-MM-ID 2190-0587 SCREW-SKT-HD-CAP M5.0×0.8 40 MM-LG 0515-1218 WASHER-FLAT 3050-0893...
Page 528 Replaceable Parts Component-Level Information Packets Figure 12-3 Rear Frame Assembly Parts Identiﬁcation Item Part Number Description 08590-60379 REAR FRAME ASSEMBLY (E-Series, L-Series, and 8591C only) REAR FRAME ASSEMBLY (8594Q only) 08594-60058 REAR FRAME, DUAL I/O 08590-00062 REAR FRAME, SINGLE I/O 5002-0690 REAR FRAME (8594Q only) 08594-00013...
Page 529 Replaceable Parts Component-Level Information Packets Figure 12-4 IF Assembly Parts Identiﬁcation Item Part Number Description EXTRUSION, END PLATE ENCLOSURE 5021-9907 EXTRUSION, CIRCUIT ENCLOSURE, TAPPED 5021-9908 SCREW-MACH M3.0 X 8MM 0515-0372 COVER-AMPLITUDE CONTROL 5001-8782 COVER-BANDWIDTH FILTER 5002-0671 COVER-LOG AMPLIFIER 5001-8769 CABLE CLAMP 1400-0510 SCREW-MACH 440 .250 PNPD 2360-0526...
Page 530 Replaceable Parts Component-Level Information Packets Figure 12-5 Chassis Side Views Parts Identiﬁcation Item Part Number Description 08590-00068 CHASSIS 3050-0105 WASHER-FLAT.125ID SCREW-MACH M3.0 × 40 SEMPNPD, 8592L, 93E, 94E, 95E, AND 96E 0515-1826 SCREW-MACH M3.0 × 45 SEMPNPD, 8590L, 8591C, AND 8591E 0515-1468 SCREW-SQBU M3.0 ×...
Page 531 Replaceable Parts Component-Level Information Packets Figure 12-6 Chassis Top View Parts Identiﬁcation Item Part Number Description SCREW-MACH M3.0 8 CWPNPDS 0515-0372 FRONT END TO IF SUPPORT BRACKET 5002-0672 0515-0372 SCREW-MACH M3.0 8 CWPNPDS WASHER-FLAT M4.0ID 3050-0893 DISPLAY SHIELD 08590-00066 Chapter 12...
Page 532 Replaceable Parts Component-Level Information Packets Figure 12-7 Chassis Bottom View Parts Identiﬁcation Item Part Number Description SCREW-MACH M3.0 8 CWPNPDS 0515-0372 NUT-MACH WLKWR M3.0 (STANDARD ONLY) 0535-0031 STANDOFF (STANDARD ONLY) 0380-1363 SCREW-MACH M3.0 12 SEMPNPD 0515-1453 SCREW-ST M4.0 12 PNPD 0515-0808 SCREW-MACH M3.0 12 PCPNPDS 0515-1110...
Page 533 Replaceable Parts Component-Level Information Packets Figure 12-8 Impact Cover Parts Identiﬁcation Item Part Number Description IMPACT COVER ASSEMBLY 5062-4805 GASKET, 3.2 FT. 5041-7235 CATCH LATCH 5021-5483 SCREW-MACH M2.5 6MM-LG PAN-HD 0515-0894 DRAW CATCH ASSEMBLY 5062-0730 Chapter 12...
Page 534 Replaceable Parts Component-Level Information Packets Foldout 12-1 Parts Identiﬁcation 8592L, 8593E, 8593E, 8596E A3 Front-End Assembly Item Part Number Description SCREW-MACH 3.0 × 8MM PAN-HD 0515-0372 SCREW-MACH 6-23 × .625 PAN-HD 2360-0123 5022-0179 WASHER, EYO SHOULDER SCREW-MACH 4.0 × 12MM TORX 0515-0382 1400-0024 CABLE CLAMP...
Page 535 Replaceable Parts Component-Level Information Packets Foldout 12-3 Parts Identiﬁcation 8590L, and 8591E RF Assembly Item Part Number Description RF BRACKET 08590-00051 SCREW-MACH 3.0 × 8MM PAN-HD 0515-0372 SCREW-MACH 4-40 × .312 PAN-HD 2360-0526 SCREW-MACH 2-56 × .25 PAN-HD 0520-0174 SCREW-MACH 3.0 × 10MM PAN-HD 0515-0380 CABLE CLAMP 1400-0650...
Page 536 Replaceable Parts Component-Level Information Packets Foldout 12-5 Parts Identiﬁcation 8590 C-Series, E-Series and L-Series Front Frame Assembly (Continued) Item Part Number Description 8594L FRONT PANEL-DRESS 08594-60017 8594Q FRONT PANEL-DRESS (OPTION 190) 08594-60053 8595E FRONT PANEL-DRESS 08595-00002 8596E FRONT PANEL-DRESS 08596-00001 PROBE POWER CONNECTOR (M) 5060-0467 NUT-SPCLY 15/32-32-THD (SECURES W7)
Page 537 Replaceable Parts Component-Level Information Packets Foldout 12-6 Parts Identiﬁcation 8591C RF Assembly Item Part Number Description 08590-00034 RF BRACKET SCREW-MACH 3.0 × 8ΜΜ PAN-HD 0515-0372 SCREW-MACH 4-40 × .312 PAN-HD 2360-0526 SCREW-MACH 4-40 × .250 PAN-HD 2200-0521 SCREW-MACH 3.0 × 10ΜΜ PAN-HD 0515-0380 SCREW-MACH 3.0 ×...
Page 538 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 540 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 542 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 543 FOLDOUT 12-3 8590L AND 8591E RF ASSEMBLY...
Page 544 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 546 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 548 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 550 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 552 Replaceable Parts Component-Level Information Packets Chapter 12...
Page 553: Softkey Descriptions
Softkey Descriptions Refer to this chapter for an explanation of the instrument passcodes, the two types of instrument correction data, and the service-related softkeys that are available after pressing...
Page 554 Softkey Descriptions Softkey Descriptions The calibration, service, and diagnostic softkey functions are listed alphabetically. A list of service-related softkeys follows each softkey description, when appropriate. Refer to the description of each related softkey to understand how the softkey functions interrelate. Softkey Descriptions Calibration, Service, and Diagnostic Softkey Functions...
Page 555 Softkey Descriptions Softkey Descriptions Figure 13-1 Calibration, Service, and Diagnostic Softkey Tree: 8590 E-Series and L-Series, and 8594Q QAM Analyzers Chapter 13...
Page 556 Softkey Descriptions Softkey Descriptions Figure 13-2 Calibration, Service, and Diagnostic Softkey Tree: 8591C Chapter 13...
Page 557 Softkey Descriptions Softkey Descriptions Understanding Analyzer Passcodes Passcodes activate speciﬁc softkey functions and protect the correction data from accidental erasure or modiﬁcation. The two passcodes, −37 Hz and −2001 Hz, are explained below. −37 Hz Passcode Use the −37 Hz passcode to perform the following functions. •...
Page 558 Softkey Descriptions Softkey Descriptions Understanding Analyzer Correction Data The ﬁrmware uses correction data to improve instrument performance by minimizing the effect of variations in hardware. There are two categories of correction data. • Self-calibration correction factors. • Service-calibration correction constants. Most correction data can be displayed and modiﬁed with the softkey functions provided by Self-Calibration Correction Factors...
Page 559 Softkey Descriptions Softkey Descriptions The frequency of the 10 MHz standard timebase, a room temperature crystal oscillator (RTXO), is controlled by a DAC located on the A25 counterlock assembly. Refer to the 10 MHz reference procedure in Chapter 2 to adjust the timebase DAC using .Analyzers CAL TIMEBASE equipped with a A24 Tracking Generator (Options 010 and 011) use two...
Page 560 Softkey Descriptions Softkey Descriptions φLock ON OFF Phase Lock On/Off Disables locking of the ﬁrst LO to allow faster response ESCRIPTION of the keypad and the sweep when the analyzer has a poor frequency calibration. Before a normal sweep, the analyzer uses the frequency calibration to set the ﬁrst LO close to the desired value.
Page 561 Softkey Descriptions Softkey Descriptions −10 V REF DETECTOR −10 V Reference Detector Displays the output of the −10 V reference from the A7 ESCRIPTION analog interface assembly as horizontal line at the bottom graticule. Refer to Chapter 4 for additional troubleshooting information.
Page 562 Softkey Descriptions Softkey Descriptions Amp Cor Amplitude Correction Accesses the menus for controlling the current ESCRIPTION amplitude-correction factors. Refer to the 8590 E-Series and L-Series Spectrum Analyzers User's Guide, for more information about amplitude correction. ANALYZER GAINS Analyzer Gains Displays the gains of the various sections of the ESCRIPTION analyzer block diagram for the current settings.
Page 563 Softkey Descriptions Softkey Descriptions BINARY SPAN Binary Span Note that this function is available for 8590L and ESCRIPTION 8591E spectrum analyzers and 8591C cable TV analyzers only. Displays the output of the Span DAC on the A7 analog interface assembly. A ramp is displayed from the upper-left corner to the lower right corner of the display.
Page 564 Softkey Descriptions Softkey Descriptions CAL AMPTD Calibrate Amplitude Note that if both CAL FREQ CAL AMPTD ESCRIPTION self-calibration routines are required, perform the routine ﬁrst. FREQ softkey initiates an amplitude CAL AMPTD self-calibration routine. Connect CAL OUT to the analyzer input before pressing CAL AMPTD During the self-calibration routine,...
Page 565 Softkey Descriptions Softkey Descriptions • While CAL: 3dB BW is displayed, the following calibrations are performed: The 3 dB and 6 dB EMI resolution bandwidths are measured. DACs on the A7 analog interface assembly adjust the bandwidth of the LC and crystal ﬁlters on the A11 and A13 Bandwidth Filter assemblies.
Page 566 Softkey Descriptions Softkey Descriptions • While CAL: LOG AMP is displayed, the following calibrations are performed: The log ﬁdelity is measured in 1 dB steps. Errors are corrected with digital offsets of the video signal on the A16 assembly. The video offsets are stored as correction factors. If a failure occurs during this calibration routine, an error message is displayed.
Page 567 Softkey Descriptions Softkey Descriptions CAL FREQ Calibrate Frequency initiates the frequency self-calibration CAL FREQ ESCRIPTION routine. Connect CAL OUT to the analyzer input before initiating CAL FREQ Note that it is normal for the FREQ UNCAL error message to appear brieﬂy during CAL FREQ During the self-calibration routine, messages...
Page 568 Softkey Descriptions Softkey Descriptions • While CAL: SPAN is displayed: The main-coil sweep sensitivity and span attenuator are adjusted for LO spans greater than 10 MHz. The adjustment routine checks for three displayed signals: 0 Hz, 300 MHz, and 600 MHz. The test passes if all three signals are found within a 750 MHz span.
Page 569 Softkey Descriptions Softkey Descriptions If a failure occurs during this calibration routine, an error message is displayed. Refer to Chapter 14 descriptions of displayed error messages. Be sure to press after running the CAL STORE routine. FREQ CAL AMPTD ELATED OFTKEYS CAL FREQ &...
Page 570 Softkey Descriptions Softkey Descriptions CAL FREQ & AMPTD Calibrate Frequency and Amplitude initiates both the frequency and CAL FREQ & AMPTD ESCRIPTION amplitude self-calibration routines. Connect CAL OUT to the analyzer input before initiating CAL FREQ & AMPTD Be sure to press after running the CAL STORE routine.
Page 571 Softkey Descriptions Softkey Descriptions Note that the routine must be performed CAL YTF before running the routine. New frequency CAL MXR response correction constants must also be generated whenever the routine is used. Refer to the CAL MXR CAL MXR adjustment routine in Chapter 2 instructions on the use of the CAL YTF...
Page 572 Softkey Descriptions Softkey Descriptions CAL TIMEBASE Calibrate Timebase Note that this function is available for 8591 E-Series ESCRIPTION spectrum analyzers and 8591C cable TV analyzers only. Analyzers equipped with Precision Frequency Reference, do not use this softkey function. Use this softkey to change the setting of the 10 MHz reference (standard timebase) DAC.
Page 573 Softkey Descriptions Softkey Descriptions CAL TRK GEN Calibrate Tracking Generator Note that this function is available for instruments ESCRIPTION equipped with Option 010, 50Ω Output Tracking Generator, and Option 011, 75Ω Output Tracking Generator, only. initiates the tracking generator CAL TRK GEN self-calibration routine.
Page 574 Softkey Descriptions Softkey Descriptions CAL YTF Calibrate YTF This function is available for 8592L, 8593E, 8595E, and ESCRIPTION 8596E spectrum analyzers only. Note that the user should perform the routine CAL YTF if there has been a large change in ambient temperature.
Page 575 Softkey Descriptions Softkey Descriptions COARSE TUNE DAC Coarse Tune DAC Displays the analog output of the YTO coarse-tune ESCRIPTION DAC located on the A7 analog interface assembly. The mnemonic for the control voltage is C_TUNE. When is selected, a horizontal line COARSE TUNE DAC is displayed in the lower four divisions of the screen.
Page 576 Softkey Descriptions Softkey Descriptions If the error message POS-PK FAIL is displayed, the mean of the data from the positive-peak detector is less than the mean from the sample detector data. 2. Sample-Detector Check and error message SAMPLE FAIL. The test checks switching for the sample detector. The peak-to-peak amplitude of the noise ﬂoor for the sample detector should be wider than the noise ﬂoor for the positive-peak detector.The test detects the...
Page 577 Softkey Descriptions Softkey Descriptions 5. A12 Step-Gain Check and error message STEP GAIN/ATTEN FAIL. The test checks the switching of the step gains on the A12 amplitude control assembly. The test does not check step-gain accuracy. The test steps the reference level from −60 dBm to +30 dBm, in 10 dB increments, with the input attenuator set to 60 dB.
Page 578 Softkey Descriptions Softkey Descriptions CORRECT ON OFF Correction On/Off The analyzer corrects for variations in hardware ESCRIPTION performance in two ways. • Digital offsets of the video signal on the A16 processor/video assembly. • Adjustment of the DAC control voltages provided by the A7 analog interface assembly.
Page 579 Softkey Descriptions Softkey Descriptions function does not affect the CORRECT ON OFF following DAC adjustments. • Resolution bandwidth corrections. • Reference level amplitude correction. • YTO frequency and span corrections. • 10 MHz reference (standard timebase) DAC correction. Refer to the description in this chapter and CAL AMPTD Chapter 4...
Page 580 Softkey Descriptions Softkey Descriptions CRT VERT POSITION CRT Vertical Position The softkey provides the following adjustment for the ESCRIPTION vertical display position. • Press and use the A1A2 knob on CRT VERT POSITION the front panel to adjust the display. •...
Page 581 Softkey Descriptions Softkey Descriptions Each DAC may be set to any integer between 0 and ⇑ 4095 using the A1A2 knob on the front panel. Use the and ⇓ keys to make large changes in the DAC settings. • The ⇑ key increments the DAC setting in an even binary progression of 0, 2, 4, 8, 16,…, 4096.
Page 582 Softkey Descriptions Softkey Descriptions DEFAULT CAL DATA Default Calibration Data The current correction-factor data is replaced in ESCRIPTION nonvolatile memory by the factory-loaded default calibration data when is used. The DEFAULT CAL DATA default data can be used only if a passcode, either −37 Hz or −2001 Hz, has been entered.
Page 583 Softkey Descriptions Softkey Descriptions Figure 13-4 Default Calibration Data: Page 2 Figure 13-5 Default Calibration Data: Page 3 (Option 130 only) ELATED OFTKEYS DISPLAY CAL DATA CAL FREQ CAL AMPTD CAL TIMEBASE CORRECT ON OFF Chapter 13...
Page 584 Softkey Descriptions Softkey Descriptions DISPLAY CAL DATA Display Calibration Data Displays the current correction-factor data generated ESCRIPTION by the self-calibration CAL FREQ CAL AMPTD routines. Refer to Figure 13-6 through Figure 13-8 an example of typical calibration data displayed when using Press to exit the data...
Page 585 Softkey Descriptions Softkey Descriptions Figure 13-8 Typical Calibration Data: Page 3 (Option 130 only) The following text describes each column of correction data illustrated in Figure 13-6, Figure 13-7, and Figure 13-8. The sections of Figure 13-6, Figure 13-7, and Figure 13-8 that contain numbers retain data that is the same for all analyzers;...
Page 586 Softkey Descriptions Softkey Descriptions The 10 dB attenuator step is the amplitude reference used by the self-calibration CAL AMPTD routine while calibrating the input attenuator. Refer to the softkey description for more CAL AMPTD information about the calibration of the input attenuators.
Page 587 Softkey Descriptions Softkey Descriptions • CAL ATT ERR. These error corrections are mathematical offsets of the digitized video signal on the A16 processor/video assembly. The ﬁrst ﬁve entries in the “CA ATT ERR” column are correction constants that correct amplitude errors for the calibration attenuators on the A12 amplitude control assembly.
Page 588 Softkey Descriptions Softkey Descriptions DROOP Droop Droop disables the reset of the peak detector on the A16 ESCRIPTION processor/video assembly after each analog-to digital conversion. When an impulse signal is applied, the decrease, or droop, in the peak-detector output is visible.
Page 589 Softkey Descriptions Softkey Descriptions EDIT FLATNESS Edit Flatness ESCRIPTION To safeguard the current ﬂatness-correction constants, refer to CAUTION Chapter 3 for information about backing up analyzer correction constants before using this function. The ﬂatness-correction constants can be viewed or modiﬁed using EDIT FLATNESS •...
Page 590 Softkey Descriptions Softkey Descriptions EXECUTE TITLE Execute Title to execute remote programming EXECUTE TITLE ESCRIPTION commands that have been entered from the front-panel using . Refer to the user's guide, for your CHANGE TITLE instrument, for more information about CHANGE TITLE CHANGE TITLE ELATED OFTKEYS...
Page 591 Softkey Descriptions Softkey Descriptions FLATNESS DATA Flatness Data Provides access to the softkeys used for viewing or ESCRIPTION editing the ﬂatness correction constants. The −2001 Hz passcode is required when editing the correction data. Avoid pressing the softkey when pressing the CAUTION INIT FLT STORE FLATNESS...
Page 592 Softkey Descriptions Softkey Descriptions FM GAIN FM Gain Note that this function is available for 8593E, 8594E, ESCRIPTION 8594Q, 8595E, and 8596E spectrum analyzers equipped with Option 102, AM/FM Speaker and TV Sync Trigger, only. This softkey duplicates the functions of the FM GAIN key that is accessed using adjusts...
Page 593 Softkey Descriptions Softkey Descriptions 4. Simulate a 500 kHz modulated signal by pressing the following keys. FREQUENCY ⇑ If FM GAIN is functioning correctly, the displayed signal is deﬂected from center screen to bottom screen as the center frequency is stepped up 500 kHz from the original center frequency setting.
Page 594 Softkey Descriptions Softkey Descriptions FM OFFSET FM Offset Note that this function is available for 8593E, 8594E, ESCRIPTION 8594Q, 8595E, and 8596E spectrum analyzers equipped with Option 102, AM/FM Speaker and TV Sync Trigger, only. to adjust the horizontal trace for FM OFFSET center-screen with no modulation on the carrier.
Page 595 Softkey Descriptions Softkey Descriptions 3. Adjust the position of the horizontal trace to center-screen using the A1A2 knob. 4. To calculate the actual frequency offset in kHz, multiply the displayed value by 300. DEMOD ELATED OFTKEYS DEMOD AM FM FM GAIN FM SPAN FM Span Displays the FM_SPAN signal from the Span Dividers ESCRIPTION...
Page 596 Softkey Descriptions Softkey Descriptions Figure 13-9 LO Frequency Diagnostic Data Display Chapter 13...
Page 597 Softkey Descriptions Softkey Descriptions Calculated coarse-tune DAC (0-4095) Sampler harmonic number Calculated sampler IF in Hz Wide-band discriminator sensitivity factor Actual frequency error in Hz on last count Actual measured sampler IF in Hz Actual coarse tune DAC number (0-4095) Main coil sensitivity in number of bits per Hz Actual ﬁne tune DAC number (0-4095) Spans >10 MHz, changes from sweep to sweep...
Page 598 Softkey Descriptions Softkey Descriptions FRQ DISC NORM OFF Frequency Discriminator Normal/Off Indicates the status of the frequency discriminator as a ESCRIPTION function of LO span. • In LO spans less than or equal to 10 MHz, NORM should be underlined, indicating the discriminator is in use.
Page 599 Softkey Descriptions Softkey Descriptions additional information about analyzer recovery and initialization after a A16 Memory Loss. Selects the identity of the analyzer. There is one ﬁrmware set for the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers. By selecting the appropriate identiﬁcation number (IDNUM), the ﬁrmware conﬁgures the analyzer to the proper frequency range and analyzer functions.
Page 600 Softkey Descriptions Softkey Descriptions INIT FLT 22 GHz Initialize Flatness 22 GHz Note that this function is available for 8592L and ESCRIPTION 8593E spectrum analyzers only. Prepares the analyzer memory for the entry of new ﬂatness correction constants. The −2001 Hz passcode is required and must be entered before pressing performs the following functions.
Page 601 Softkey Descriptions Softkey Descriptions EDIT FLATNESS ELATED OFTKEYS INIT FLT 22 GHz STORE FLATNESS MAIN COIL DR Main-Coil Drive Displays the output of the main-coil driver produced on ESCRIPTION the A7 analog interface assembly. Perform the following steps to observe the output of the main-coil driver. 1.
Page 602 Softkey Descriptions Softkey Descriptions MAIN SPAN Main Span Displays the main-coil-span signal, MC_SPAN, from ESCRIPTION the span dividers on the A7 analog interface assembly. Perform the following steps to observe MC_SPAN for the main-coil spans (LO spans greater than 10 MHz). 1.
Page 603 Softkey Descriptions Softkey Descriptions PRESEL DAC Preselector DAC Note that this function is available for 8592L, 8593E, ESCRIPTION 8595E, and 8596E spectrum analyzers only. Peaks the YTF preselector by manually adjusting the YTF ﬁne-tune DAC. The front-panel entry range for the DAC is from 1 to 3840.
Page 604 Softkey Descriptions Softkey Descriptions QP DET ON OFF ELATED OFTKEYS QP RST ON OFF QPD OFFSET QPD OFFSET Quasi-Peak Detector Offset Sets the offset of the quasi-peak detector. ESCRIPTION Note that this function is available for 8590 E-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers only.
Page 605 Softkey Descriptions Softkey Descriptions SERVICE DIAG Service Diagnostics Provides access to the service-diagnostic softkey ESCRIPTION functions. For selected service softkeys, an abbreviation for the active service function appears in the detector display block. The display block is located in the upper left-hand corner of the display.
Page 606 Softkey Descriptions Softkey Descriptions Enter the new correction constants into A16 RAM with the following procedure. 1. Press the following keys. PRESET , −2001, FREQUENCY SET ATTN ERROR 2. The data-entry instruction for the 1 dB step, ENTER CAL ATTEN ERROR 1, is displayed in the active-function block, just below the active entry for the reference-level-offset value, REF LVL OFFSET.
Page 607 Softkey Descriptions Softkey Descriptions STOR PWR ON UNITS Store Power-On Units Allows the user to change the amplitude display units ESCRIPTION that appear at instrument power-on or when PRESET pressed. The following amplitude display units can be selected: dBm, dBmV, dBµV, Volts, and Watts. For example, pressing the following keys sets the analyzer power-on units to read out in dBmV in log mode, volts in linear mode, and input impedance to 50 or 75 ohms.
Page 608 Softkey Descriptions Softkey Descriptions STORE FLATNESS Store Flatness Note that the softkey is accessible STORE FLATNESS ESCRIPTION only after entering the −2001 Hz passcode prior to pressing the softkeys. EDIT FLATNESS After entering new ﬂatness-correction constants, use to store them in nonvolatile memory. STORE FLATNESS Avoid pressing the softkey when pressing the...
Page 609 Softkey Descriptions Softkey Descriptions SWEEP TIME DAC Sweep-Time DAC Displays the output of the sweep-time DAC, SWP_DAC, ESCRIPTION from the sweep-ramp generator on the A7 analog interface assembly. The top graticule represents +10 V and the bottom represents −10 V. The sweep times are grouped into three ranges.
Page 610 Softkey Descriptions Softkey Descriptions X FINE TUNE DAC Extra-Fine Tune DAC Displays the output of the YTO extra-ﬁne-tune DAC, ESCRIPTION FM_TUNE, on the A7 analog interface assembly. The lower four divisions of the screen represent a 0 to −10 V output range. Midscreen represents 0 V and bottom-screen represents −10 V.
Page 611 Softkey Descriptions Softkey Descriptions YTF TUNE COARSE YTF Tune Coarse Note that this function is available for 8592L, 8593E, ESCRIPTION 8595E, and 8596E spectrum analyzers only. Displays the output of the YTF coarse-tune DAC produced on the A7 analog interface assembly. The instrument must be in a single-band sweep for the display to be valid.
Page 612 Softkey Descriptions Softkey Descriptions YTF TUNE COARSE ELATED OFTKEYS PRESEL DAC PRESEL DEFAULT YTF SPAN YTF Span Note that this function is available for 8592L, 8593E, ESCRIPTION 8595E, and 8596E spectrum analyzers only. Displays the output of the YTF span divider, YTF_SPAN, on the A7 analog interface assembly.
Page 613: Analyzer Messages
Analyzer Messages Refer to this chapter for information about hardware-error, user-error, and informational messages that are displayed when a problem with the operation of the analyzer occurs.
Page 614: Interpreting Analyzer Messages
Analyzer Messages Interpreting Analyzer Messages Interpreting Analyzer Messages The analyzer ﬁrmware displays error messages and informational prompts to warn the user of instrument failure or improper use. There are three types of messages: hardware-error messages (H), informational messages (M), and user-created error messages (U). •...
Page 615 Analyzer Messages Interpreting Analyzer Messages φ LOCK OFF (U) (H) Indicates slow YTO tuning. This message may appear if the analyzer is using default correction factors. φ LOCK OFF appears brieﬂy during the CAL FREQ routine, during instrument preset, or when the frequency value is changed;...
Page 616 Analyzer Messages Interpreting Analyzer Messages Table 14-1 Possible Cause of the Error Message ADC-GND FAIL A16J1 Possible Error-Message Source Pin Number A14 log ampliﬁer assembly An assembly installed in the card cage An assembly installed in the card cage An assembly installed in the card cage A16 processor/video assembly An assembly installed in the card cage Signal incorrectly applied to the AUX VIDEO...
Page 617 Analyzer Messages Interpreting Analyzer Messages Before removing the A16 processor/video assembly, check all assemblies that are identiﬁed in Table 14-1. 1. Turn the instrument power off and remove each assembly, one at a time. 2. Turn the instrument on. • If the ADC ground fault remains, the instrument preset at power-up displays the error message.
Page 618 Analyzer Messages Interpreting Analyzer Messages ADC-TIME FAIL (H) During an instrument preset, the time between analog-to-digital conversion readings is greater than the test limit. An instrument preset routine is also performed during the self-calibration routines. Related Assemblies A16 processor/video assembly. Troubleshooting Hints If the instrument does not sweep, and all other instrument functions are normal, the probable cause of the error message is a defective A16...
Page 619 Analyzer Messages Interpreting Analyzer Messages Table 14-2 Possible Cause of the Error Message ADC-2V FAIL A16J1 Possible Error-Message Source Pin Number A14 log ampliﬁer assembly An assembly installed in the card cage An assembly installed in the card cage An assembly installed in the card cage A16 processor/video assembly An assembly installed in the card cage Signal incorrectly applied to the AUX VIDEO output...
Page 620 A16 processor/video assembly. Check the ADC 2 V reference voltage on the A16 processor/video assembly. Refer to 8590 Series Analyzers Component-Level Repair Service Guide for the location of the 2 V reference circuit in the analog-to-digital function block.
Page 621 Analyzer Messages Interpreting Analyzer Messages CAL:_ _ _ (M) During the self-calibration routine, messages may appear on the display to indicate how the calibration routines are progressing. For example, sweep, freq, span, MC delay, FM coil, and atten can appear on the analyzer display.
Page 622 Analyzer Messages Interpreting Analyzer Messages CAL: DATA NOT STORED CAL AMP NEEDED (U)(H) The current correction-factor data is the default calibration data. The instrument ﬁrmware prevents the default data from being stored. While the default data is in use, a ﬂag is set. If is pressed, CAL STORE the error message is displayed and...
Page 623 Analyzer Messages Interpreting Analyzer Messages CAL: GAIN FAIL (H) During the routine, the amplitude of the video signal at the CAL AMPTD ADC on the A16 processor/video assembly is too low. The error message appears when the reference-level-calibration DAC, located on the A7 analog interface assembly, has been adjusted to its maximum of 255, and the amplitude of the video signal remains below tolerance.
Page 624 Analyzer Messages Interpreting Analyzer Messages CAL: MAIN COIL SENSE FAIL (H) The analyzer could not set up span sensitivity of the main coil. Related Assemblies 8590L and 8591E spectrum analyzers only: A6 YTO, A7 analog interface. All other 8590 E-Series and L-Series spectrum analyzers: A3A7 YTO, A7 analog interface.
Page 625 Analyzer Messages Interpreting Analyzer Messages CAL: NBW 200 Hz width failed (H) Indicates that the 200 Hz resolution bandwidth is not the correct bandwidth for the calibration routine. Related Assemblies A130 narrow resolution bandwidth card. Troubleshooting Hints Perform the CAL AMPTD CAL: NBW gain failed (H) Indicates that one of the resolution bandwidths is not the correct amplitude for the calibration routine.
Page 626 Analyzer Messages Interpreting Analyzer Messages CAL: RES BW AMPL FAIL (H) During the routine, the insertion loss of a resolution CAL AMPTD bandwidth ﬁlter, relative to the amplitude of the 3 kHz resolution bandwidth ﬁlter, was greater than 2.2 dB. Related Assemblies A7 analog interface, A11 bandwidth ﬁlter, A13 bandwidth ﬁlter, A14 log ampliﬁer/detector.
Page 627 Analyzer Messages Interpreting Analyzer Messages The default data introduces frequency offsets that can make an accurate CAL OUT signal appear to be outside the test limits for the CAL OUT check. If desired, the instrument CAL OUT check can be bypassed.
Page 628 Analyzer Messages Interpreting Analyzer Messages CAL: USING DEFAULT DATA (M) routine was not completed and default correction CAL AMPTD factors are being used. Troubleshooting Hints Interruption of the routine can cause the routine to CAL AMPTD terminate and produce this message. Refer to Chapter 13 for more information about...
Page 629 Analyzer Messages Interpreting Analyzer Messages Cannot engage phase lock with current CAL FREQ data (U) Indicates that the routine needs to be performed before CAL FREQ phase locking can be turned on. Related Assemblies A9 third converter assembly. Troubleshooting Hints , −37, If this message appears, press FREQUENCY...
Page 630 Analyzer Messages Interpreting Analyzer Messages Comb harmonic at_ _ _ GHz NOT found (U)(H) Indicates that the CAL YTF routine for the analyzer cannot ﬁnd a harmonic of the comb generator at frequency displayed. Related Assemblies 8590L and 8591E spectrum analyzers only: A3A8 YIG-tuned ﬁlter, A7 analog interface assembly.
Page 631 Analyzer Messages Interpreting Analyzer Messages 2. Look for the 100 MHz comb-generator signal to the right of the local oscillator signal. When COMB GEN ON OFF is OFF, this signal has an amplitude of approximately –8 dBm and the 100 MHz harmonics are less than –20 dBc. Press the following keys.
Page 632 “personality” and cannot be edited. A personality is a program that is manufactured by Agilent Technologies and is available for use with the 8590 Series analyzer. An example of a personality is the 85716A CATV system monitor personality.
Page 633 Analyzer Messages Interpreting Analyzer Messages Table 14-3 Four-Digit Failure Code Interpretation Digits From Equivalent A16 Circuit Tested A16 Reference Example Binary Value LEDs Designator D → Video RAM * U305, U306 → I/O Bus Address * → 68230 F → I/O Bus (Odd byte) †...
Page 634 Analyzer Messages Interpreting Analyzer Messages The 10-Digit Failure Code The 10-digit segment provides further failure information for the I/O address bus, the I/O data bus, and the A16 video RAM circuitry. Each digit of the 10-digit hexadecimal segment must be translated to its binary equivalent to obtain the failure information.
Page 635 Analyzer Messages Interpreting Analyzer Messages The I/O Data-Bus Failure Code. The next four digits identify failed data lines on the I/O data bus. Convert the four digits to binary and interpret them with Table 14-5. Table 14-5 I/O Data Bus Failure Code Interpretation Digits From Equivalent A16 Circuit Tested...
Page 636 Analyzer Messages Interpreting Analyzer Messages The Video RAM Failure Code. The last four digits identify the failure address for the video RAM on the A16 assembly. A video RAM failure code indicates an internal failure on the A16 assembly; the section of the video RAM circuitry that is tested is not connected to other instrument assemblies.
Page 637 Analyzer Messages Interpreting Analyzer Messages Related Assemblies A7 analog interface, A16 processor/video assembly, A17 memory card, A25 counter lock, assemblies installed in the card cage. Troubleshooting Hints Refer to Figure 9-1, IF/Control Overall Block Diagram, and Figure 9-2, Figure 9-3, or Figure 9-4, RF Section Overall Block Diagram for your analyzer, in...
Page 638 Analyzer Messages Interpreting Analyzer Messages FREQ UNCAL (U) (H) The YTO (YIG-tuned oscillator) frequency is more than 20 MHz from the desired frequency. If the FREQ UNCAL message appears constantly, it indicates a YTO-tuning error and the CAL FREQ routine should be performed.
Page 639 Analyzer Messages Interpreting Analyzer Messages Gate card not calibrated (U)(H) This message can indicate that either the CAL AMPTD routine need to be performed before the time-gating functions can be used, or that something was connected to the GATE TRIGGER INPUT connector during the CAL AMPTD or CAL FREQ &AMPTD routines.
Page 640 Analyzer Messages Interpreting Analyzer Messages INVALID CARD: BAD MEDIA (U)(H) Indicates the formatting routine ( ) for the memory card FORMAT CARD could not be completed. See the description for INVALID CARD above for more information about the possible causes of this message. INVALID CARD: DATA ERROR (U)(H) Indicates the data could not be retrieved from the memory card.
Page 641 Analyzer Messages Interpreting Analyzer Messages INVALID <ﬁle name> NOT FOUND (U) Indicates that the speciﬁed ﬁle could not be loaded into analyzer memory or purged from memory because the ﬁle name cannot be found. INVALID FILENAME_ _ _(U) Indicates the speciﬁed ﬁle name is invalid. A ﬁle name is invalid if there is no ﬁle name speciﬁed, if the ﬁrst letter of the ﬁle name is not alphabetic, or if the speciﬁed ﬁle type does not match the type of ﬁle.
Page 642 Analyzer Messages Interpreting Analyzer Messages INVALID ITEM: _ _ _(U) Indicates an invalid parameter has been used in a programming command. INVALID KEYLBL: _ _ _(U) Indicates that the speciﬁed key label contains too many characters. A key label is limited to 8 printable characters per label line. INVALID KEYNAME:_ _ _ (U) The speciﬁed key name is not allowed.
Page 643 Analyzer Messages Interpreting Analyzer Messages INVALID REPEAT NEST LEVEL (U) The nesting level in the REPEAT routine is improperly constructed. This can occur if too many REPEAT routines are nested. When used within a downloadable program (DLP), the maximum number of REPEAT UNTIL statements that can be nested is 20.
Page 644 Analyzer Messages Interpreting Analyzer Messages Memory Overﬂow: and reload (U) ERASE DLP MEM This message indicates that too many user-deﬁned items (functions, variables, key deﬁnitions), or downloadable programs have been loaded into analyzer memory. Related Assemblies A16 processor/video assembly. Troubleshooting Hints and then load the user-deﬁned item or DISPOSE USER MEM downloadable program into analyzer memory.
Page 645 Analyzer Messages Interpreting Analyzer Messages INVALID TRACENAME: _ _ _ (U) Indicates the speciﬁed trace could not be saved because the trace name is not allowed. To avoid this problem, use an underscore as the second character in the trace name, or avoid beginning the trace name with the following pairs of letters: LB, OA, OL, TA, TB, TR, MA, MF, TS, OT, and INVALID VALUE PARAMETER: _ _ _ (U) The speciﬁed value parameter is invalid.
Page 646 Analyzer Messages Interpreting Analyzer Messages LO UNLVL (U)(H) Indicates that the analyzer local oscillator distribution ampliﬁer is not functioning properly. This message may appear on the 8592L, 8593E, 8594E, 8595E, and 8596E with Options 009/010, Option 009, or Option 010. Related Assemblies A10 LO distribution ampliﬁer (LODA) control/tracking generator control.
Page 647 Analyzer Messages Interpreting Analyzer Messages MEAS UNCAL (U) The measurement is uncalibrated. Check the sweep time, span, and bandwidth settings, or press AUTO COUPLE, AUTO ALL. No card found (U) Indicates that the memory card is not inserted. No points deﬁned (U) Indicates the speciﬁed limit line or amplitude correction function cannot be performed because no limit line segments or amplitude correction factors have been deﬁned.
Page 648 Analyzer Messages Interpreting Analyzer Messages 4. When the comb-generator output ampliﬁer is enabled, the amplitude of the 100 MHz signal and the 100 MHz harmonics increase. The 100 MHz signal amplitude increases to approximately +12 dBm. If the signal amplitude does not increase, check that the comb-generator control line from the A7 analog interface assembly is switching correctly.
Page 649 Analyzer Messages Interpreting Analyzer Messages POS-PK FAIL (H) The positive-peak-detector check has failed during the conﬁdence test routine, . The level of the noise ﬂoor for the positive-peak CONF TEST detector is statistically compared to that of the sample detector. The mean of the data from the positive-peak detector should be greater than the mean of the data from the sample detector.
Page 650 Analyzer Messages Interpreting Analyzer Messages 2. If the rear panel connection is correct, check the power output of the 10 MHz frequency reference. • The A22 standard 10 MHz timebase (RTXO) has an typical output of 0 dBm ± 6 dB. •...
Page 651 Analyzer Messages Interpreting Analyzer Messages RES-BW NOISE FAIL (H) During the conﬁdence test routine, , the noise ﬂoor level was CONF TEST too high for the indicated resolution bandwidth. Starting with the widest resolution bandwidth, the test compares the noise ﬂoor amplitude of each bandwidth to the noise ﬂoor amplitude of the next, narrower resolution bandwidth.
Page 652 Analyzer Messages Interpreting Analyzer Messages 2. Use to view the current bandwidth control DISPLAY CAL DATA factors. 3. Perform the self-calibration routine. Use CAL AMPTD DISPLAY to monitor changes in the bandwidth control factors CAL DATA each time the routine is performed. CAL AMPTD 4.
Page 653 Analyzer Messages Interpreting Analyzer Messages SAMPLE FAIL (H) During the conﬁdence test routine, , the sample-detector CONF TEST test, has failed. The test makes a statistical comparison between the peak-to-peak amplitude of the noise ﬂoor for the positive-peak detector and the noise ﬂoor for the sample detector. The error message is displayed if the standard deviation of the data for the sample detector is less than the standard deviation of data for the positive-peak detector.
Page 654 Analyzer Messages Interpreting Analyzer Messages SMPLR UNLCK (U)(H) Indicates that the sampling oscillator circuitry is not functioning properly. Related Assemblies 8591E and 8590L spectrum analyzers and 8591C cable TV analyzers only: A6 YTO, A25 counter lock board assembly. All other 8590 E-Series and L-Series spectrum analyzers and 8591C cable TV analyzers: A3A7 YTO, A25 counter lock board assembly.
Page 655 Analyzer Messages Interpreting Analyzer Messages If one of the 10 dB step gains appears to be faulty, check the step-gain control lines from the A7 analog interface assembly. Refer to “Troubleshooting the A15 Motherboard Assembly” Chapter 5 for the location of the step gain control lines. If the control lines function correctly, suspect a A12 amplitude control assembly failure.
Page 656 Analyzer Messages Interpreting Analyzer Messages TG SIGNAL NOT FOUND (U) This error message applies to analyzers equipped with Option 010, 50 Ω Output Tracking Generator, and Option 011, 75 Ω Output Tracking Generator. Description During the self-calibration routine, a signal response CAL TRK GEN above the ﬁrst division from bottom screen is not present.
Page 657 Analyzer Messages Interpreting Analyzer Messages Too many signals with valid N dB points (U) Indicates the N dB PTS function has located two or more signals that have amplitudes within the speciﬁed dB from the signal peak. If this happens, you should decrease the span of the analyzer so that only the signal that you want to measure is displayed.
Page 658 Analyzer Messages Interpreting Analyzer Messages VID-BW FAIL (H) During the routine, the video bandwidth check has failed. CONF TEST The test checks for a decrease in the peak-to-peak excursion of the noise trace as the video bandwidth is decreased. Related Assemblies A14 log ampliﬁer/detector, A16 processor/video assembly.
Page 659: Service Equipment And Tools
Service Equipment and Tools This chapter contains information about service equipment and tools needed to perform analyzer calibration, adjustments, and troubleshooting.
Page 660: Service Equipment And Tools
Service Equipment and Tools Service Equipment and Tools Service Equipment and Tools Static-Safe Accessories Electrostatic discharge (ESD) can damage or destroy electronic components. All work performed on assemblies containing electronic components should be done only at a static-safe workstation. Table 15-1 provides information on ordering static-safe accessories and shows an example of a static-safe workstation using two types of ESD protection.
Page 661 Service Equipment and Tools Service Equipment and Tools Table 15-1 Static-Safe Accessories Description Part Number Set includes: 3M static control mat 0.6 m × 1.2 m (2 ft × 4 ft) and 4.6 m 9300-0797 (15 ft) ground wire. (The wrist-strap and wrist-strap cord are not included.
Page 662 Service Equipment and Tools Service Equipment and Tools Recommended Service Tools Table 15-2 Figure 15-1 provide descriptions and part numbers for special service tools that are used throughout this manual. Table 15-3 provides an additional list of common hand tools that are also recommended for repairing the 8590 D-Series and E-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Qs.
Page 663 Service Equipment and Tools Service Equipment and Tools Table 15-2 Special Service Tools Item Description Part Number Use* Board puller, two prongs to lift PC boards 03950-4001 Extender board, pin and socket, 20 contacts (two required) 5062-1999 Extender board, pin and socket, 60 contacts 5062-2000 Extender board, 22 pin edge connector, 44 contacts 08565-60107...
Page 664 Service Equipment and Tools Service Equipment and Tools Figure 15-1 Special Service Tools Chapter 15...
Page 665 Service Equipment and Tools Service Equipment and Tools Table 15-3 Required Common Hand Tools Description Part Number Use* Hex (Allen) wrench, 3mm 8710-1392 Hex (Allen) wrench, 4mm 8710-1755 Hex (Allen) wrench, no. 4 5020-0288 Hex (Allen) wrench, no. 6 5020-0289 Nut driver, 7mm 8710-1217 Nut driver, 3/8 inch...
Page 666 Service Equipment and Tools Service Equipment and Tools Chapter 15...
Page 667: Safety And Regulatory Information
Safety and Regulatory Information...
Page 668: Safety Considerations
Safety and Regulatory Information Safety Considerations Safety Considerations Before servicing the analyzer, familiarize yourself with the safety markings on the analyzer and the safety instructions in this manual. This analyzer has been manufactured and tested according to international safety standards. To ensure safe operation of the instrument and the personal safety of the user and service personnel, the cautions and warnings in this manual must be heeded.
Page 669: Instrument Markings
Safety and Regulatory Information Instrument Markings Instrument Markings The instruction documentation symbol. The product is marked with this symbol when it is necessary for the user to refer to the instructions in the documentation. The CE mark is a registered trademark of the European Community.
Page 670: General Safety Considerations
Safety and Regulatory Information General Safety Considerations General Safety Considerations Failure to ground the analyzer properly can result in personal WARNING injury, as well as analyzer damage. Before turning on the analyzer, connect a three-wire power cable with a standard IEC 320-C13 (CEE 22-V) inlet plug to the analyzer power receptacle.
Page 671 Safety and Regulatory Information General Safety Considerations For continued protection against ﬁre hazard replace line fuse WARNING only with same type and rating (F 5A/250V). The use of other fuses or material is prohibited. The power cord is connected to internal capacitors that may WARNING remain live for 10 seconds after disconnecting the plug from its power supply.
Page 672: Protection From Electrostatic Discharge
Safety and Regulatory Information Protection from Electrostatic Discharge Protection from Electrostatic Discharge Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe workstation. Figure 16-1 shows an example of a static-safe workstation using two types of ESD protection.
Page 673 Safety and Regulatory Information Protection from Electrostatic Discharge Handling of Electronic Components and ESD The possibility of unseen damage caused by ESD, is present whenever components are transported, stored, or used. The risk of ESD damage can be greatly reduced by close attention to how all components are handled.
Page 674 Safety and Regulatory Information Protection from Electrostatic Discharge Chapter 16...

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