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Fluke 96000 Series Service Manual

Rf reference source
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96000 Series
RF Reference Source
Service Manual
September 2014
© 2014 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 96000 Series

  • Page 1 96000 Series RF Reference Source Service Manual September 2014 © 2014 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.

  • Page 3: Table Of Contents

    Table of Contents Chapter Title Page Introduction and Specifications ............1-1 Introduction .................... 1-1 Contact Fluke Calibration ..............1-2 Safety Information ................. 1-2 Symbols ..................... 1-3 General Safety Summary ..............1-3 Prevent Instrument Damage .............. 1-5 Specifications ..................1-7 General Specifications (96040A and 96270A) ........1-7 Frequency Reference Input/Output Specifications (96040A and 96270A) ...............
  • Page 4 96000 Series Service Manual Performance Tests ................3-1 Introduction .................... 3-1 Recommended Tools and Equipment ........... 3-1 Performance Test .................. 3-4 Reference Frequency Accuracy ............3-5 Frequency Accuracy (96040A and 96270A) ........3-6 Harmonics and Spurious Signal Content - Levelling Head (96040A and 96270A) ...............
  • Page 5 Contents (continued) Removing Major Assemblies ............. 5-8 RF Output PCA ................5-8 2 x 2W Coaxial Relays ..............5-10 Front Panel Assembly ..............5-10 Display and Keypad PCA .............. 5-11 Digital PCA ..................5-12 27 GHz Control PCA (96270A) ............5-13 Synthesizer PCA ................
  • Page 6 96000 Series Service Manual...
  • Page 7 List of Tables Table Title Page 1-1. Symbols ..................... 1-3 3-1. Recommended Equipment ................ 3-2 3-1. Recommended Equipment ................ 3-3 3-2. Frequency Accuracy Test ................3-7 3-3. Harmonics Test ..................3-11 3-4. Spurious Content Test ................3-12 3-5. Phase Noise Test (96040A and 96270A) ..........3-14 3-6.
  • Page 8 96000 Series Service Manual 3-24. Microwave Output Level Accuracy Test, Low Frequency Test Points ..3-58 3-25. Microwave Output Level Accuracy Test, High Frequency Test Points ..3-61 3-26. Microwave Output Level Accuracy Test, Additional Low Level Test Points, Part A .................... 3-64 3-27.
  • Page 9 List of Figures Figure Title Page 2-1. Overall Functional Block Diagram (96040A) ..........2-2 2-2. Overall Functional Block Diagram (96270A) ..........2-3 2-3. Synthesizer PCA - Simplified Schematic ........... 2-8 2-4. RF Output PCA - Simplified Schematic ............. 2-9 2-5. Leveling Head Assembly - Simplified Block Diagram ........ 2-10 2-6.
  • Page 10 96000 Series Service Manual 3-18. Equipment Connections - Microwave Output Frequency Accuracy Test Part A ....................3-67 3-19. Equipment Connections - Microwave Output Frequency Accuracy Test Part B ....................3-69 3-20. Equipment Connections – Microwave Output Harmonics and Spurious Content Test ................3-71 5-1.

  • Page 11: Introduction And Specifications

    Introduction This manual provides performance test, calibration adjustment, and minor troubleshooting and repair procedures necessary to verify and maintain the performance of the 96000 Series RF Reference Source (the Product or the Instrument). Note In many of the procedures in this manual, the Instrument is referred to as the UUT (Unit Under Test).

  • Page 12: Contact Fluke Calibration

    The Leveling Head is an integral part of the UUT functionality. Repairs detailed in this manual are to the Modular-level only. For repair to a deeper level, return the Product to Fluke Calibration or take the Product to a local Fluke Calibration Service Center.

  • Page 13: Symbols

    WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.
  • Page 14 96000 Series Service Manual Warning To prevent possible electrical shock, fire, or personal injury: • Read all safety information before you use the Product. • Carefully read all instructions. • Use the Product only as specified, or the protection supplied by the Product can be compromised.

  • Page 15: Prevent Instrument Damage

    • The front panel Head RF Output and Head Control connectors on the Product are suited only for use with Fluke 96040A-xx Leveling Heads or the 9600FLT 1-GHz Wide Offset Filter. Only compatible power sensors should be connected to the front panel Sensor connectors. No other connections are permitted.
  • Page 16 96000 Series Service Manual • The optional power sensor(s) contain components which can be destroyed by electrostatic discharges. To prevent this, never touch the sensor RF connector inner conductor and never open the sensor. Never exceed the sensor maximum RF power limit. Even brief overloads can destroy the sensor.

  • Page 17: Specifications

    Introduction and Specifications Specifications Specifications General Specifications (96040A and 96270A) All specifications apply to a 1-year calibration interval at an ambient temperature of Tcal ±5 °C. Performance Nominal factory Tcal calibration temperature 23 °C. Unless otherwise noted, specifications are stated at a 99 % confidence level IEEE488.2 (GPIB) Standard Interfaces 96270A only: Compatible power sensor inputs...

  • Page 18: Frequency Reference Input/Output Specifications (96040A And 96270A)

    96000 Series Service Manual Frequency Reference Input/Output Specifications (96040A and 96270A) Frequency Reference Input Rear-panel Reference Frequency Input BNC connector Frequency 1 MHz to 20 MHz in 1 MHz steps ±0.3 ppm, typical Level 1 V pk nominal into 50 Ω, ±5 V pk max...
  • Page 19 Introduction and Specifications Specifications Attenuation 50 Ω Output 75 Ω Output Relative to +16 dBm output: 0 - 55 dB ±0.025 dB 55 - 64 dB ±0.03 dB 64 - 74 dB ±0.05 dB Relative to +10 dBm output 74 - 100 dB ±0.07 dB 100 - 116 dB ±0.15 dB...
  • Page 20 96000 Series Service Manual Amplitude Flatness relative to 50 Ω Output 100 kHz Amplitude 10 Hz >100 kHz 10 MHz >128 MHz >300 MHz >1.4 GHz >3 GHz 100 kHz <100 kHz <10 MHz 128 MHz 300 MHz 1.4 GHz...

  • Page 21: Leveled Sine Specifications At Microwave Output (96270A)

    Introduction and Specifications Specifications Leveled Sine Specifications at Microwave Output (96270A) Frequency Range 1 mHz to 27 GHz Standard: <100 MHz: 0.001 Hz (1 mHz), ≥100 MHz: 11 digits, ≥10 GHz 12 digits Resolution Enhanced: <4 GHz: 0.000 01 Hz (10 μHz), ≥4 GHz: 0.000 1 Hz (100 μHz) Internal Frequency Reference: ±0.05 ppm ±5 μHz Accuracy External Frequency Reference: ±5 μHz...
  • Page 22 96000 Series Service Manual [1] [2] Microwave Splitter/Sensor Output: Cal Factor Uncertainty Calibration Factor uncertainty, applicable to power sensor calibration Figures in parenthesis 100 MHz 1 GHz 2.4 GHz 8 GHz 12 GHz 18 GHz 22 GHz 26.5 GHz apply with alternative user traceability and ±1.06 %...

  • Page 23: Leveled Sine Specifications At Leveling Head Output (96040A And 96270A) And Microwave Output (96270A)

    Leveled Sine Specifications at Leveling Head Output (96040A and 96270A) and Microwave Output (96270A) Signal Purity At maximum output level ≤1 GHz: <-60 dBc, >1 GHz: <-55 dBc Harmonics 96040A and 96270A: ≤9 MHz: <-75 dBc, ≤500 MHz: <-84 dBc, ≤1 GHz: <-78 dBc, Spurious ≥3 kHz offset ≤2 GHz: <-72 dBc, ≤4 GHz: <-66 dBc 96270A: ≤8 GHz: <-60 dBc, ≤16 GHz: <-54 dBc, ≤27 GHz: <-48 dBc...
  • Page 24 96270A Microwave Output only The 9600FLT Wide Offset Phase Noise Filter accessory is a narrow bandwidth 1 GHz bandpass filter for use with the 96000 Series models to reduce phase noise levels at high offset frequencies when operating at an output frequency of 1 GHz.

  • Page 25: Modulation Specifications At Leveling Head Output (96040A And 96270A) And Microwave Output (96270A)

    Introduction and Specifications Specifications Rear panel 50 MHz Counter, Modulation, Leveling and Frequency Pull Input External Frequency Control Input BNC connector ±5 ppm Frequency Pull Range User adjustable between 0.0001 ppm/V to 1.0000 ppm/V, positive or negative Frequency Pull Sensitivity polarity Input impedance 10 kΩ...
  • Page 26 AM External Rear-panel BNC connector (50 MHz Counter, Modulation, Leveling and Frequency Pull Input Input). 10 kΩ nominal input impedance. Bandwidth (-3 dB) DC coupled : dc to 220 kHz, typical. AC coupled: 10 Hz to 220 kHz, typical. Depth Sensitivity User adjustable, 0.5 %/V to 400 %/V Input Level ±2 V pk maximum operating, ±5 V pk absolute maximum...
  • Page 27 Introduction and Specifications Specifications FM & PM Distortion FM Deviation Limits and Performance Specifications Distortion Deviation (dBc) (Fd) 4.8 MHz Max Available Deviation 750 KHz 300 kHz 220 kHz 180 kHz 150 kHz 66 kHz Fd <2 % Fc Fd <0.6 % Fc Fd <0.12 % Fc Performance Specifications Applicable 10 Hz...

  • Page 28: Frequency Sweep Specifications At Leveling Head Output (96040A And 96270A) And Microwave Output (96270A)

    96000 Series Service Manual Modulation Trigger Output Rear panel Trigger I/O BNC connector Level TTL compatible logic output, selectable as rising or falling edge ±500 ns typical, from modulation waveform zero crossing for Sinusoidal or Timing Alignment positive peak for Triangle...

  • Page 29: Frequency Counter Specifications

    Introduction and Specifications Specifications Frequency Counter Specifications Rear-panel BNC connector (300 MHz Counter). Input impedance selectable 50 Ω (dc coupled) or 10 kΩ 96270A (ac coupled), nominal. AC coupled into 0 V threshold. Input Rear-panel BNC connector (50 MHz Counter, Modulation, Leveling and Frequency Pull Input).
  • Page 30 96000 Series Service Manual 1-20...

  • Page 31: Theory Of Operation

    Chapter 2 Theory of Operation Introduction This chapter provides the theory of operation for the Product. The theory is presented at a high-level and is supported by an overall functional block diagram. Since the Product is supported at the module (board) level, the theory is often a useful troubleshooting tool for isolating faulty PCAs.
  • Page 32 96000 Series Service Manual Rear Panel Provides the mounting location for ports, connectors, and switches needed to externally access and influence the operation of the Instrument. Leveling Head Assembly Leveling, control, and attenuation of the RF Output Signal. 27 GHz Control PCA Controls frequency generation and output level above 4 GHz (96270A).

  • Page 33: User Interface

    Theory of Operation Overall Functional Description REAR PANEL RF Output PCA 20 kHz - 15.625 MHz External AM/FM input and Sweep Trigger I/O 300Mhz frequency counter to 27GHz Control PCA 1 GHz - 2.7 GHz 10 MHz Frequency Divide Mux, OCXO Synthesis Filter, &...

  • Page 34: Frequency Synthesis

    96000 Series Service Manual Frequency Synthesis Primary frequency synthesis takes place within the Synthesizer PCA (Figure 2-3), where a combination of phase lock, frequency translation and direct digital synthesis (DDS) techniques are used to generate signals of appropriate resolution, phase noise and spectral purity. Four main outputs are created, covering the ranges 20 kHz to 9 MHz, 1 GHz to 2.7 GHz, 2.7 GHz to 4 GHz and,...

  • Page 35: Frequency Modulation

    Theory of Operation Overall Functional Description Head. Two level detectors are used: a LF Detector (20 kHz < frequencies > 125 MHz) and a HF Detector (125 MHz < frequencies > 4 GHz). For output levels below approximately -60 dBm, the 60 dB attenuator is switched in, and in this condition the level is sensed by LF and HF Detectors on the RF Output PCA prior to attenuation.

  • Page 36: Instrument Control

    96000 Series Service Manual The modulating waveform is generated by a 36-bit numerically controlled oscillator (NCO) with a programmable wave table, but a dedicated A-D converter is included to allow the instrument to accept an external analogue modulation source. Instrument Control Overall control of instrument functions is provided by the Digital PCA which accepts data from the Front Panel Assembly user interface.
  • Page 37 Theory of Operation Overall Functional Description The differential trapezoidal waveform is applied to the primary of the low voltage (LV) transformer. This transformer has three secondary windings whose outputs are rectified, smoothed and regulated on the Synthesizer PCA to produce floating supply outputs of +20 V dc unregulated, -5.2 V dc, +3.3 V dc, +5 V dc, -15 V dc, +2.5 V dc, +9 V dc, +12 V dc, +15 V dc, and +25 V dc from which all functions on the Synthesizer PCA, RF Output PCA, Leveling Head and 27 GHz Control PCA...
  • Page 38 96000 Series Service Manual hpn389.eps Figure 2-3. Synthesizer PCA - Simplified Schematic...
  • Page 39 Theory of Operation Overall Functional Description hpn388.eps Figure 2-4. RF Output PCA - Simplified Schematic...
  • Page 40 96000 Series Service Manual hpn387.eps Figure 2-5. Leveling Head Assembly - Simplified Block Diagram 2-10...
  • Page 41 Theory of Operation Overall Functional Description hpn386.eps Figure 2-6. 27 GHz Control and Multiplier PCA – Simplified Schematic 2-11...
  • Page 42 96000 Series Service Manual 2-12...

  • Page 43: Performance Tests

    Chapter 3 Performance Tests Introduction Warning  To prevent possible electrical shock, fire, or personal injury: • Do not perform the verification tests or calibration procedures described in this manual unless you are qualified to do so. The information provided in this manual is for the use of qualified personnel only.
  • Page 44 Frequency Standard Fluke 910R 1 x 10 frequency uncertainty 4 GHz; frequency resolution 10 Hz, short term Fluke 9640A, 96040A or amplitude stability 0.1dB Signal Source 96270A 75 Ω Leveling Head required for testing 75 Ω UUTs. Frequency resolution: 0.1 Hz Frequency Accuracy: ±...
  • Page 45 Microwave Output characterization adjustment only compatible Rhode & Schwarz NRP-Z series power sensors of the appropriate frequency range may be substituted. Refer to chapters 1 and 3 of the 96000 Series Operator’s Manual for details of compatible sensors.

  • Page 46: Performance Test

    Do the tests in sequence and ensure that all prior equipment connections have been removed prior to starting a new test. Fluke Calibration recommends that optional tests indicated be performed after repair, but are not essential for routine verification. For some tests, the uncertainty of the recommended equipment is significant and must be taken into account to determine compliance with published specifications.

  • Page 47: Reference Frequency Accuracy

    Performance Tests Performance Test Reference Frequency Accuracy Equipment required for this test: • Frequency Counter • Frequency Standard To verify the accuracy of the internal frequency reference: 1. Warm up the UUT (continuous operation) for 24 hours, minimum. 2. Connect the 10 MHz output from the Frequency Standard to the EXT REF IN on the Frequency Counter (rear panel) using a BNC male –...

  • Page 48: Frequency Accuracy (96040A And 96270A)

    96000 Series Service Manual Frequency Accuracy (96040A and 96270A) Equipment required for this test: • Frequency Counter • Spectrum Analyzer • Frequency Standard • 50 Ω Leveling Head (supplied with UUT) To verify the accuracy of the output frequency developed by the UUT: 1.
  • Page 49 Performance Tests Performance Test 4. Set the UUT as follows: Ref Frequency Input Disabled Mode Leveled Sine Signal Microwave Output Frequency 10 kHz Level +13 dBm Output OPER 5. Set the Frequency Counter as follows: Function Freq A Slope Positive Coupling 50 Ω...
  • Page 50 96000 Series Service Manual Spectrum Analyzer Front Instrument RF Input Rear Leveling Head 10 MHz Output from Frequency Standard External Reference Frequency Input hpn390.eps Figure 3-3. Equipment Connections - Frequency Accuracy Test Part B 11. Set the Spectrum Analyzer as follows:...

  • Page 51: Harmonics And Spurious Signal Content - Levelling Head (96040A And 96270A)

    17. Set the UUT output frequency and the Spectrum Analyzer center frequency to the next frequency listed in part B of Table 3-2. 18. Repeat steps 15 to 17. 19. Set the UUT output to STBY. Remove all connections. Harmonics and Spurious Signal Content - Levelling Head (96040A and 96270A) Equipment required for this test: •...
  • Page 52 96000 Series Service Manual 8. Using the Spectrum Analyzer delta marker functions, measure the amplitude on the Spectrum Analyzer for the UUT's 2 harmonic relative to the fundamental. The (delta marker) value shown must be within the tolerance listed in Table 3-3 for 2nd harmonic.
  • Page 53 Performance Tests Performance Test 11. Repeat steps 5 through 10 for all frequencies in Table 3-3, using the settings and tolerances shown for each. For UUT output frequency settings of 1.8 GHz and above where the UUT level setting is +14 dBm, set the Analyzer reference level to +20 dBm.

  • Page 54: Phase Noise Test (96040A And 96270A, Optional)

    96000 Series Service Manual 16. Set the output frequency of the UUT and the Spectrum Analyzer center frequency to each of the frequencies listed in Table 3-4, repeating steps 14 through 15. 17. Set the UUT output to STBY. Table 3-4. Spurious Content Test...
  • Page 55 Performance Tests Performance Test To verify the UUT phase noise performance using a Signal Source Analyzer: 1. Connect the output of the 50 Ω Leveling Head to the RF INPUT of the Signal Source Analyzer. Note Do not connect the UUT and Signal Source Analyzer frequency reference inputs and outputs.

  • Page 56: Modulation Test-Leveling Head (96040A And 96270A, Optional)

    96000 Series Service Manual 9. Push the up () and down () keys on the Signal Source Analyzer to move the marker across the phase-noise plot on the display to each of the offset frequencies listed in Table 3-5. At each offset frequency, observe the marker data on the display of the Signal Source Analyzer and verify the phase noise is within the limit shown in Table 3-5.
  • Page 57 Performance Tests Performance Test 3. On the UUT, push , followed by the Modulation Select softkey and ensure amplitude modulation (AM) is selected. Set the UUT as follows: Note For the 96270A, ensure the Leveling Head output is selected. Frequency 30 MHz Level +10 dBm...
  • Page 58 96000 Series Service Manual 9. On the UUT, push the Modulation Select softkey and select frequency modulation (FM). Set the UUT as follows: Frequency 62.5 MHz Level +13 dBm Mod Rate 1 kHz (Sine) FM Deviation 300 kHz Output OPER Modulation 10.

  • Page 59: Frequency Counter Accuracy (96040A And 96270A)

    Performance Tests Performance Test Table 3-9. FM Deviation Test – Leveling Head (96040A and 96270A Modulation Level Frequency Deviation Tolerance Rate 400 Hz 10 kHz 99.70 kHz to 100.30 kHz 100 kHz 10 kHz 99.70 kHz to 100.30 kHz 125 MHz 400 Hz 300 kHz 309.0 kHz to 291.0 kHz...

  • Page 60: Level Accuracy - 50 Ω Leveling Head (96040A And 96270A)

    96000 Series Service Manual assembly and enable the REF FREQUENCY OUTPUT at 10 MHz. On the UUT, push to select the Frequency Counter function, followed by the Frequency Counter softkey. 1. Select the 80 s Gate Time and wait until a valid reading is shown. (If required, a reading can be triggered by pushing the Reading Mode, followed by Single Shot, and then Take Reading softkeys).
  • Page 61 250 µH is usually effective. A suitable choke is 6 turns of small- diameter coaxial cable through a TDK toroid, manufacturer’s part no. H5C2-T28-13-16 (available as Fluke part no. 474908) Refer to the 5970A Operator Manual for additional explanation. Note Measurements made on the 5790A 2.2 mV range (at levels below -...
  • Page 62 96000 Series Service Manual 2. Set the UUT as follows: Note For the 96270A, ensure the Leveling Head output is selected. Mode Leveled Sine Frequency 1 kHz Level +16 dBm Output OPER 3. Allow the AC Measurement Standard to make several measurements and the reading to settle.
  • Page 63 Performance Tests Performance Test Table 3-10. 50 Ω Leveling Head, Low Frequency Level Accuracy Test Points Amplitude Frequency Tolerance 1 kHz +16 dBm 20 kHz 100 kHz 1 kHz +13 dBm 20 kHz 100 kHz 1 kHz +3 dBm 20 kHz 100 kHz 1 kHz -7 dBm...
  • Page 64 96000 Series Service Manual Instrument Power Meter N Adapter Head Leveling Power Sensor hpn212.eps Figure 3-6. Equipment Connections - 50 Ω Leveling Head, High Frequency Level Accuracy Test Points (96040A and 96720A) 10. Configure the Power Meter to indicate readings in dBm. Enter the measurement frequency (0.1 MHz) into the Power Meter to enable cal factor...
  • Page 65 Performance Tests Performance Test Note The insertion loss of the 50 Ω Type-N female-to-female adapter must be taken into account at each measurement frequency. 15. Set the UUT to the next frequency point at this amplitude listed in Table 3-11, and repeat steps 13 through 15.
  • Page 66 96000 Series Service Manual Note The recommended Power Meter has Power Sensor calibration factors stored internally in the sensor. Setting the input frequency in the Power Meter automatically selects the appropriate cal factor for the measurement. However, the Power Sensor may also be accompanied by a table of calibration factors which must be applied externally.
  • Page 67 Performance Tests Performance Test Table 3-12. 50 Ω Leveling Head, High Frequency Level Accuracy Test Points, Diode Power Sensor (96040A and 96720A) Amplitude Frequency Reading Tolerance 100 kHz Reference ±0.05 dB 10 MHz ±0.05 dB 100 MHz ±0.07 dB -7 dBm 300 MHz ±0.20 dB 1.4 GHz...
  • Page 68 96000 Series Service Manual Low-Level Test Points (steps 28-36) 28. Connect the Leveling Head to the RF INPUT of the Measuring Receiver and connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the Spectrum Analyzer Ext Ref In (on rear). See Figure 3-7 for equipment connections.
  • Page 69 Performance Tests Performance Test Making these precision low-level measurements requires appropriate choice of Measuring Receiver settings to provide adequate linearity, noise floor, and reading repeatability throughout the amplitude range required. For any given frequency, the Measuring Receiver settings must be maintained for all amplitudes at that frequency after establishing the reference point.
  • Page 70 96000 Series Service Manual Table 3-13. 50 Ω Leveling Head, Low-Level Accuracy Test Points Part A (96040A and 96270A) Part Frequency Amplitude Reading Tolerance -37 dBm Reference Reference ±0.03 dB -47 dBm -57 dBm ±0.20 dB 100 kHz -66 dBm ±0.20 dB...
  • Page 71 Performance Tests Performance Test Table 3-13. 50 Ω Leveling Head,-Low Level Accuracy Test Points Part B (96040A and 96270A) Part Frequency Amplitude Reading Tolerance -75 dBm Reference Reference 100 kHz -85 dBm ±0. 50 dB -75 dBm Reference Reference -85 dBm ±0.30 dB 10 MHz -95 dBm...
  • Page 72 96000 Series Service Manual 37. On the UUT, enable the REF FREQUENCY OUTPUT at 10 MHz and set the UUT as follows: Frequency 10 MHz Level -75 dBm Output OPER 38. Allow the Measuring Receiver to tune the input signal, and then set the controls to measure RF level, relative (dB) to the current input level.

  • Page 73: Attenuation Accuracy - 50 Ω Leveling Head (Optional 96040A And 96270A)

    Performance Tests Performance Test Ω Attenuation Accuracy – 50 Leveling Head (Optional 96040A and 96270A) Equipment required for this test: • Measuring Receiver • Attenuator, 6 dB, 50 Ω, N-Type • 50 Ω Leveling Head (supplied with UUT) Note In the subsequent tests, the tolerances shown refer to specifications listed in the Chapter 1, Specifications section of this manual.
  • Page 74 96000 Series Service Manual Note The 6 dB attenuator is used to minimize mismatch errors. In some cases, additional attenuation is required to satisfy alternative Measuring Receiver maximum input limitations. Note Unwanted interference from signals at 10 MHz due to the frequency...
  • Page 75 Performance Tests Performance Test Ω VSWR Test – 50 Leveling Head (Optional 96040A and 96270A) Equipment required for this test: • Signal Source, 50 Ω output • Spectrum Analyzer • 50 Ω directional bridge • Precision 50 Ω Open/Short termination •...
  • Page 76 96000 Series Service Manual 2. On the UUT enable the REF FREQUENCY OUTPUT at 10 MHz. Ensure the Spectrum Analyzer and signal generator external reference frequency inputs are enabled for input at 10 MHz. 3. Connect the signal generator RF output to the input port of the directional bridge.
  • Page 77 Performance Tests Performance Test 14. Reconnect the directional bridge test port to the UUT and set it to OPER. 15. Set the Spectrum Analyzer display to linear. Set the sweep time to 5 ms, single sweep. 16. Set the UUT frequency to 500 MHz, set the signal generator frequency to 500.00001 MHz, and set the Spectrum Analyzer center frequency to 500 MHz.

  • Page 78: Level Accuracy - 75 Ω Levelling Head (96040A And 96270A)

    To aid readability, the procedure is divided into stages, however the complete procedure must be done in the sequence described. Fluke Calibration recommends that the users familiarize themselves with the entire absolute level accuracy verification procedure before commencing.
  • Page 79 250 µH is usually effective. A suitable choke is 6 turns of small- diameter coaxial cable through a TDK toroid, manufacturer’s part no. H5C2-T28-13-16 (available as Fluke part no. 474908) Refer to the 5970A Operator Manual for additional explanation. Note Measurements made on the 5790A 2.2 mV range (at levels below -...
  • Page 80 96000 Series Service Manual AC Measurement Standard 5790A AC MEASUREMENT STANDARD Instrument Range (Vin - Ref) / Ref Clear 2.2V -27.0 AUTO INPUT2 INPUT 1 INPUT 2 1000V RMS MAX 1000V RMS MAX INPUT1 INPUT2 WBND SHUNT EX GRD VIEW UTIL 2.2 mV...
  • Page 81 Performance Tests Performance Test Table 3-17. Level Accuracy Test (75 Ω), Low Frequency Test Points Amplitude Frequency Tolerance ±0.12 dB 1 kHz ±0.12 dB +10 dBm 20 kHz ±0.12 dB 100 kHz ±0.12 dB 1 kHz ±0.12 dB +7 dBm 20 kHz ±0.12 dB 100 kHz...
  • Page 82 96000 Series Service Manual High Frequency Test Points (steps 8-17) 8. Connect the 75 Ω Leveling Head to the 75 Ω Power Sensor via a precision 75 Ω Type-N female-to-female adapter. See Figure 3-11 for equipment connections. Instrument Power Meter...
  • Page 83 Performance Tests Performance Test Note The recommended Power Meter has Power Sensor calibration factors stored internally in the sensor. Setting the input frequency in the Power Meter automatically selects the appropriate cal factor for the measurement. However, the Power Sensor may also be accompanied by a table of calibration factors which must be applied externally.
  • Page 84 96000 Series Service Manual Table 3-18. 75 Ω Leveling Head, High Frequency Level Accuracy Test Points (96040A and 96270A) Amplitude Frequency Reading Tolerance 100 kHz Reference ±0.12 dB 10 MHz ±0.12 dB +10 dBm 100 MHz ±0.15 dB 300 MHz ±0.25 dB...
  • Page 85 Performance Tests Performance Test Low Level Test Points (steps 18-26) 18. Connect the Leveling Head to the RF INPUT of the Measuring Receiver and connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the Spectrum Analyzer Ext Ref In (on rear). See Figure 3-12 for equipment connections.
  • Page 86 96000 Series Service Manual 19. On the UUT enable the REF FREQUENCY OUTPUT a 10 MHz and set the UUT as follows: Frequency 100 kHz Level -33 dBm Output OPER 20. Allow the Measuring Receiver to tune the input signal, and then set the controls to measure RF level, relative (dB) to the current input level.
  • Page 87 Performance Tests Performance Test Table 3-19. 75 Ω Leveling Head, Low Level Accuracy Test Points, Part A (96040A and 96270A) Part Frequency Amplitude Reading Tolerance -33 dBm Reference Reference -53 dBm ±0.15 dB 100 kHz -72 dBm ±0.20 dB -81 dBm (P ±0.70 dB -33 dBm Reference...
  • Page 88 96000 Series Service Manual Table 3-20. 75 Ω Leveling Head, Low Level Accuracy Test Points, Part B (96040A and 96270A) Part Frequency Amplitude Reading Tolerance -33 dBm Reference Reference ±0.15 dB -53 dBm 100 kHz ±0.20 dB -63 dBm ±0.70 dB...
  • Page 89 Performance Tests Performance Test Note The above procedure and test points listed in Tables 3-18 and 3-19 verify the performance of all the level control and attenuation circuits that determine level accuracy throughout the entire amplitude range, avoiding the need to make difficult precision level measurements at extremely low levels below -101 dBm.
  • Page 90 96000 Series Service Manual 32. Return the UUT output to -81dBm, set the UUT frequency to the next frequency listed in part A of Table 3-21, and repeat steps 29 through 32. 33. Set the UUT to 10 MHz at -91dBm. Repeat steps 39 through 43 for the points listed in part B of Table 3-21 using the calculation P in step 30.

  • Page 91: Attenuation Accuracy - 75 Ω Leveling Head (Optional, 96040A And 96270A)

    Performance Tests Performance Test Ω Attenuation Accuracy – 75 Leveling Head (Optional, 96040A and 96270A) Equipment required for this test: • Measuring Receiver • Precision Adapter, Type-N female-to-female, 75 Ω • Attenuator, 6 dB, 50 Ω , N-Type • 75 Ω to 50 Ω impedance-matching pad •...
  • Page 92 96000 Series Service Manual Front Spectrum Analyzer Instrument 75 Ω to 50 Ω Impedance Matching Pad RF Input 75 Ω Leveling Head 6 dB Attenuator Rear Ext Ref Input Ref Frequency Output hpn225.eps Figure 3-13. Equipment Connections - Attenuation Accuracy Test 75 Ω Leveling Head (96040A and...

  • Page 93: Vswr Test - 75 Ω (Optional)

    Performance Tests Performance Test 3. Allow the Measuring Receiver to tune the input signal, and then set the controls to measure RF level, relative (dB) to the current input level. 4. At each attenuation level listed in Table 3-22 allow the Measuring Receiver reading to stabilize.
  • Page 94 96000 Series Service Manual To verify the UUT’s output VSWR using a directional bridge and a Spectrum Analyzer: 1. Connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the Spectrum Analyzer and signal generator external reference inputs using a BNC tee and BNC male –...
  • Page 95 Performance Tests Performance Test Signal Source Connect the Signal Source 9610A/AF REFERENCE SOURCE and Spectrum Ananlyzer Frequency 96xx HEAD INTERFACE Reference Inputs to the UUT RF OUTPUT SINE ALPHA OPER LOCK LOCK Reference Output NEXT CONTROL CHAR SWEEP PQRS WXYZ STBY UNITS ENTER...
  • Page 96 96000 Series Service Manual 13. Repeat steps 6 through 12 for the next test frequency at +7 dBm listed in Table 3-23, setting the Spectrum Analyzer center frequency to the test frequency and recording Z for each test frequency. 14. Reconnect the directional bridge test port to the UUT and set it to OPER.

  • Page 97: Microwave Output Level Accuracy (96270A, Optional Functional Test)

    Performance Tests Performance Test Table 3-23. VSWR Test (75 Ω) Signal Generator Frequency Level Maximum VSWR Frequency 560 MHz 500.000 01 MHz <1.1 +7 dBm 1 GHz 1.000 000 01 GHz <1.2 560 MHz 500.000 01 MHz <1.1 1 GHz -3 dBm 1.000 000 01 GHz <1.2...
  • Page 98 250 µH is usually effective. A suitable choke is 6 turns of small- diameter coaxial cable through a TDK toroid, manufacturer’s part no. H5C2-T28-13-16 (available as Fluke part no. 474908) Refer to the 5970A Operator Manual for additional explanation. Note Measurements made on the 5790A 2.2 mV range (at levels...
  • Page 99 Performance Tests Performance Test hpn393.eps Figure 3-15. Microwave Output Level Accuracy Tests, Low Frequency Points Connections 2. Set the UUT as follows: Mode Leveled Sine Signal Microwave Output Frequency 1 kHz Level +13 dBm Output OPER 3. Allow the ac measurement standard to make several measurements and the reading to settle.
  • Page 100 96000 Series Service Manual 4. Set the UUT output to the next frequency listed in Table 3-24 for this test amplitude. 5. Repeat step 3 and confirm that the measured output level is consistent with the typical performance shown in Table 3-24.
  • Page 101 Performance Tests Performance Test 8. Connect the thermal Power Sensor RF input directly to the UUT front panel Microwave Output connector. See Figure 3-16 for equipment connections. Power Meter hpn369.eps Figure 3-16. Microwave Output Level Accuracy Tests, High Frequency Points 9.
  • Page 102 96000 Series Service Manual Note The recommended Power Meter has Power Sensor calibration factors stored internally in the sensor. Setting the input frequency in the Power Meter automatically selects the appropriate cal factor for the measurement. However, the Power Sensor may also be accompanied by a table of calibration factors which must be applied externally.
  • Page 103 Performance Tests Performance Test Table 3-25. Microwave Output Level Accuracy Test, High Frequency Test Points Low Level Microwave Amplitude Frequency Reading Typical Tolerance Output Option? 100 kHz Reference 10 MHz ±0.5 dB 100 MHz ±0.5 dB 1 GHz ±0.5 dB +13 dBm 4.024 GHz ±1.0 dB...
  • Page 104 96000 Series Service Manual 18. The subsequent steps apply only to UUTs fitted with the Low-Level Microwave output option. 19. Connect the UUT Microwave Output to the RF INPUT of the Spectrum Analyzer/Measuring Receiver and connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the Spectrum Analyzer Ext Ref In (on rear).
  • Page 105 Performance Tests Performance Test 20. On the UUT enable the REF FREQUENCY OUTPUT at 10 MHz and set the UUT as follows: Frequency 100 kHz Level -7 dBm Output OPER 21. Allow the Spectrum Analyzer/Measuring Receiver to tune the input signal, and then set the controls to measure RF level, relative (dB) to the current input level.
  • Page 106 96000 Series Service Manual Table 3-26. Microwave Output Level Accuracy Test, Additional Low Level Test Points, Part A Part Frequency Amplitude Reading Tolerance -7 dBm Reference Reference -17 dBm ±2.0 dB 10 MHz -27 dBm ±2.0 dB -37 dBm (P ±2.0 dB...
  • Page 107 Performance Tests Performance Test Table 3-27. Microwave Output Level Accuracy Test, Additional Low Level Test Points, Part B Part Frequency Amplitude Reading Tolerance -37 dBm Reference Reference -57 dBm ±2.0 dB 100 kHz -66 dBm ±2.0 dB -75 dBm ±2.0 dB -85 dBm ±2.0 dB -37 dBm...

  • Page 108: Microwave Output Frequency Accuracy (96270A Only)

    96000 Series Service Manual Part Frequency Amplitude Reading Tolerance -75 dBm ±2.0 dB -85 dBm ±2.0 dB -37 dBm Reference Reference -47 dBm ±2.0 dB -57 dBm ±2.0 dB 20 GHz -66 dBm ±2.0 dB -75 dBm ±2.0 dB -85 dBm ±2.0 dB...
  • Page 109 Performance Tests Performance Test Instrument Frequency Counter Front 10 MHz Output from Frequency Standard Rear External Reference Frequency Input hpn391.eps Figure 3-18. Equipment Connections - Microwave Output Frequency Accuracy Test Part A 4. Set the UUT as follows: Ref Frequency Input Disabled Mode Leveled Sine...
  • Page 110 96000 Series Service Manual Table 3-28. Frequency Accuracy Test – Microwave Output Part UUT Frequency Tolerance 10 MHz 9.999 999 500 – 10.000 000 500 MHz 1 GHz 0.999 999 950 0 – 1.000 000 050 0 MHz 5 GHz 4.999 999 750 0 –...
  • Page 111 Performance Tests Performance Test Front Spectrum Analyzer Instrument RF Input Rear 10 MHz Output from Frequency Standard External Reference Frequency Input hpn392.eps Figure 3-19. Equipment Connections - Microwave Output Frequency Accuracy Test Part B 11. Set the spectrum analyzer as follows: PRESET EXT REF COUPLING...

  • Page 112: Microwave Output Harmonics And Spurious Signal Content (96270A)

    96000 Series Service Manual Microwave Output Harmonics and Spurious Signal Content (96270A) Equipment required for this test: • Spectrum Analyzer To verify the harmonic, sub harmonic, interharmonic, and spurious signal content of the UUT Microwave Output: 1. Connect the UUT front panel Microwave Output to the RF INPUT of the Spectrum Analyzer.
  • Page 113 Performance Tests Performance Test Note Signal content at the required harmonic frequency may be well below the tolerance limit, and difficult to observe on the Analyzer display with the above settings. Provided the harmonic signal is below the allowed limit, the test result may be recorded as “Pass”. However, if it is desired to measure the actual signal level, reduce the analyzer resolution bandwidth setting and/or reduce the analyzer reference level setting.
  • Page 114 96000 Series Service Manual 11. Repeat steps 5 through 10 for all output and harmonic frequencies in Table 3-29, using the settings and limits shown for each. 12. Set the UUT as follows: Frequency 4.05 GHz Level +16 dBm Output OPER 13.
  • Page 115 Performance Tests Performance Test Table 3-29. Harmonics Test, Microwave Output Level Frequency Limit Limit Harmonic Harmonic 20 kHz 40 kHz -60 dBc 60 kHz -60 dBc 2.74 MHz 5.48 MHz -60 dBc 8.22 MHz -60 dBc 5.5 MHz 11 MHz -60 dBc 16.5 MHz -60 dBc...
  • Page 116 96000 Series Service Manual 19. Set the UUT as follows: Mode Leveled Sine Signal Microwave Output Frequency 4.399994 GHz Level +4.6 dBm Output OPER 20. Set the Spectrum Analyzer to single sweep, initiate a sweep and wait for the sweep to complete. Push MARKER → PEAK.

  • Page 117: Modulation Test (96270A, Optional)

    Performance Tests Performance Test Modulation Test (96270A, Optional) Equipment required for this test: • Spectrum Analyzer/Measuring Receiver To verify the amplitude and frequency modulated outputs of the UUT: Note Verification of phase modulation is not required as phase modulation is created as sinusoidal frequency modulation with peak deviation derived from the phase deviation and rate settings.
  • Page 118 96000 Series Service Manual Table 3-31. Microwave Output AM Rate Test Frequency Modulation Rate Depth Tolerance 20 kHz 50 % 19.999 0 kHz to 20.001 0 kHz 30 MHz 100 kHz 50 % 99.99 0 kHz to 100.01 0 kHz 6.
  • Page 119 Performance Tests Performance Test Note For accurate FM measurements the measuring receiver’s setting demodulation bandwidth setting must be >3 x {rate + deviation}. In order to meet this requirement at higher rate and deviation frequencies the demodulation bandwidth setting must be increased from the default automatically configured in the modulation measurement mode.
  • Page 120 96000 Series Service Manual 3-78...

  • Page 121: Calibration Adjustment

    Additional calibration integrity seals are located on the rear panel over the lower outer cover and over the calibration enable switch. Fluke Calibration recommends that users apply calibration integrity seals in the same three locations. Calibration adjustment of the Instrument can be performed locally from the...
  • Page 122 96000 Series Service Manual During calibration adjustment, measure the output amplitude to determine the absolute level error at the amplitude/frequency combination set. Make an entry via a front panel key sequence or via GPIB command sequence to adjust the output to correct any error from nominal, and store an appropriate correction factor in the internal non-volatile memory.

  • Page 123: Rear Panel Calibration Enable Switch

    Calibration Adjustment Calibration Adjustments measurement capability is not available A spreadsheet file containing a detailed list of calibration adjustment points is available on the CD supplied with the Instrument. Rear Panel Calibration Enable Switch The rear panel calibration switch must be set to the ENABLE (up) position prior to attempting any of the calibration adjustment procedures described below.

  • Page 124: Base Adjustment - Front Panel Head Rf Output

    96000 Series Service Manual Base Adjustment - Front Panel Head RF Output Equipment required: • AC Measurement Standard • Precision 50 Ω feedthrough termination • Power Meter • Power Sensor, Diode, 50 Ω • Spectrum Analyzer/Measuring Receiver • 50 Ω Type-N female-to-BNC male adapter Use the following procedure to adjust the UUT base (mainframe).
  • Page 125 Calibration Adjustment Calibration Adjustments 8. Repeat steps 6 and 7 for all points requiring the use of the AC Measurement Standard (the UUT text box states Use Precision AC Voltmeter). Set the UUT to STBY. 9. Disconnect the AC Measurement Standard and 50 Ω feedthrough termination from the UUT base unit.
  • Page 126 96000 Series Service Manual Note The Power Meter autorange boundary may coincide with a measurement point. To avoid unwanted Power Meter autoranging during the adjustment process, manually lock the Power Meter range when the UUT indicates the current adjustment point is a Transfer Point and maintain the Power Meter range lock for all frequencies at that amplitude.

  • Page 127: Leveling Head Adjustment - 50 Ω

    Calibration Adjustment Calibration Adjustments 22. Reconfigure the Spectrum Analyzer/Measuring Receiver to make AM depth measurements. 23. Using the blue arrow keys and rotary knob, edit the UUT Actual output until the Spectrum Analyzer indicates the Target value stated. Push Accept Target.
  • Page 128 96000 Series Service Manual Note The next steps make the low frequency flatness adjustment of the 50 Ω Leveling Head using the AC Measurement Standard. 7. Using the blue arrow keys and rotary knob, edit the UUT Actual output until the AC Measurement Standard indicates the Target value stated.
  • Page 129 Calibration Adjustment Calibration Adjustments Note The recommended Power Meter has Power Sensor calibration factors stored internally in the sensor. Setting the input frequency in the Power Meter automatically selects the appropriate cal factor for the measurement. However, the Power Sensor may also be accompanied by a table of calibration factors which must be applied externally.

  • Page 130: Leveling Head Adjustment - 75 Ω

    96000 Series Service Manual Note Ω The next steps make the low-level flatness adjustment of the 50 Leveling Head using a Spectrum Analyzer/Measuring Receiver. 21. Set the UUT to OPER. 22. Set the Spectrum Analyzer reference level, span, resolution and/or video bandwidth as necessary to make a high-quality level measurement at the applied level and frequency.
  • Page 131 Calibration Adjustment Calibration Adjustments Note If the Reference Frequency or Base Adjustment was just completed, omit steps 2 and 3, below. 1. Ensure a 75 Ω Leveling Head is connected to the UUT base. 2. On the UUT, push , followed by the softkeys Support Functions>Calibration>Adjust Instrument.
  • Page 132 96000 Series Service Manual 75 Ω Power Sensor using a Type-N female-to-female adapter. See Figure 3- 11 for equipment connections. Note Ω The insertion loss of the 75 Type-N female-to-female adapter must be taken into account at each adjustment frequency.
  • Page 133 Calibration Adjustment Calibration Adjustments 18. Set the UUT to OPER. 19. Set the Spectrum Analyzer reference level, span, resolution and/or video bandwidth as necessary to make a high-quality level measurement at the applied level and frequency. Note. For each frequency it is important to maintain consistent analyzer/receiver settings as the target amplitude changes.

  • Page 134: Microwave Output Adjustment - With Low-Level Output Option Fitted

    96000 Series Service Manual Microwave Output Adjustment – With Low-Level Output Option Fitted Equipment required: • AC Measurement Standard • Precision feedthrough termination, 50 Ω • 50 Ω Type-N female-to-BNC male adapter • Power Meter • Power Sensor, Thermal, DC - 27GHz, 50 Ω...
  • Page 135 Calibration Adjustment Calibration Adjustments 7. Push Next Target. 8. Repeat steps 6 and 7 for all points requiring the use of the AC Measurement Standard (the UUT text box will indicate Use Precision AC Voltmeter). Set the UUT to STBY. 9.

  • Page 136: Microwave Output Adjustment - Low-Level Output Option Not Fitted

    96000 Series Service Manual Microwave Output Adjustment – Low-Level Output Option Not Fitted Equipment required: • AC Measurement Standard • Precision feedthrough termination, 50 Ω • 6 dB Attenuator, DC – 27 G Hz, 50 Ω, 2.92 mm • 50 Ω Type-N female-to-BNC male adapter •...
  • Page 137 Calibration Adjustment Calibration Adjustments 7. Push Next Target. 8. Repeat steps 6 and 7 for all points requiring the use of the AC Measurement Standard (the UUT text box will indicate Use Precision AC Voltmeter). Set the UUT to STBY. 9.

  • Page 138: Microwave Output Flatness Characterization

    96000 Series Service Manual Note The next steps make the high-level linearity adjustment of the Microwave Output using a Power Meter, thermal sensor and attenuator. This process relies on the linearity of the Power Sensor. The recommended Power Sensor has only one level range. If using an alternative sensor, do not allow the Power Meter to change level range for the following points.

  • Page 139: Maintenance

    Chapter 5 Maintenance Operator Maintenance Perform the subsequent general-maintenance procedures whenever necessary.  Warning To prevent possible electrical shock, fire, or personal injury: • Do not service the Product unless you qualified to do so. • Have an approved technician repair the Product. This section contains the information necessary for basic maintenance of the Product.

  • Page 140: Clean The Air Filter

    96000 Series Service Manual Clean the Air Filter Inspect and clean the rear-panel air filter at least once a year, or as necessary, to ensure adequate air circulation. If the rear panel filter air flow is obstructed, have the internal filter cleaned by a qualified technician using the procedure described below.
  • Page 141 Maintenance Operator Maintenance Table 5-1. Line-Power Fuse Manufacturer Line Power Fuse Action Fuse Rating Fluke Part No. and Type No. Littelfuse 2650730 215005.P 100 V AC to Time Delay, T5AH 250 V 240 V AC High Breaking (Quantity 2) Schurter Capacity 0001.2511...

  • Page 142: Troubleshooting

    Service Manual Troubleshooting For basic troubleshooting, see the Theory of Operation and Running the Self- Test sections. If Self-test failures occur, either contact Fluke Calibration or refer to Interpreting the Results for guidance on how to proceed. Disassembly and Reassembly This section provides step-by-step instructions for disassembling and reassembling the Product.

  • Page 143: Before You Start

    Maintenance Disassembly and Reassembly Before You Start To ensure your safety and for the protection of the Product follow all of the considerations and recommendations that follow:  Warning To prevent possible electrical shock, fire, or personal injury: • Do not remove the covers from the Product unless you are qualified to do so.

  • Page 144: Top And Bottom Covers

    96000 Series Service Manual Top and Bottom Covers The top and bottom covers are the same except for the feet on the bottom cover. To remove each of the covers: 1. Position the Product so the cover being removed is facing up.
  • Page 145 Maintenance Disassembly and Reassembly Top Cover Top Cover Inner Shield Inner Shield Air Filter Air Filter Handles Handles (4 Places) (4 Places) hpn383eps Figure 5-2. Removing External Hardware and Air Filter...

  • Page 146: Removing Major Assemblies

    96000 Series Service Manual Removing Major Assemblies RF Output PCA Three panhead screws hold the PCA in place. See Figure 5-3. To remove the RF Output PCA: 1. Remove the top cover from the Product. 2. Remove the internal shield from the Product.
  • Page 147 Maintenance Disassembly and Reassembly hpn374.eps Figure 5-3. Removing the RF Output PCA...

  • Page 148: X 2W Coaxial Relays

    96000 Series Service Manual 2 x 2W Coaxial Relays Two panhead screws hold each Relay in place. To remove the 1P 2W Coaxial Relays: 1. Remove the top cover from the Product. 2. Remove the internal shield from the Product.

  • Page 149: Display And Keypad Pca

    Maintenance Disassembly and Reassembly hpn375.eps Figure 5-4. Removing the Front Panel Assembly Display and Keypad PCA To remove the Display and Keypad PCA: 1. Remove the Front Panel Assembly from the Product. 2. Remove the Spin Wheel. There are 2 holes in the bezel molding, visible from the inside face.

  • Page 150: Digital Pca

    96000 Series Service Manual Note The display window is secured in place by adhesive tape. Do not remove the display unless it or the display window is being replaced. Note The inside of the front panel has a nickel conductive coat applied to it.

  • Page 151: 27 Ghz Control Pca (96270A)

    Maintenance Disassembly and Reassembly 27 GHz Control PCA (96270A) Six panhead screws hold the PCA in place. To remove the 27 GHz Control PCA, see Figure 5-6: 1. Remove the top cover from the Product. 2. Remove the Internal Shield from the Product. 3.

  • Page 152: Synthesizer Pca

    96000 Series Service Manual Synthesizer PCA The Synthesizer PCA is located beneath the 27 GHz Control PCA. Four panhead screws secure this assembly to the Product. See Figure 5-7. To remove the Synthesizer PCA: 1. Remove the top cover from the Product.

  • Page 153: Fans

    Maintenance Disassembly and Reassembly Fans Two cooling fans are secured to the side of the chassis each with four pan head screws. See Figure 5-8. To remove one or both fans: 1. Remove the top cover from the Product. 2. Remove the air filter. 3.

  • Page 154: Rear Panel Assemblies

    96000 Series Service Manual Rear Panel Assemblies The Rear Panel provides the hardware for mounting the Low Voltage Transformer, the Interconnection PCA, and the Switch Mode Power Supply Module. See Figure 5-9. To remove the Rear Panel Assembly: 1. Remove rear handles.

  • Page 155: Interconnection Pca

    Maintenance Disassembly and Reassembly hpn380.eps Figure 5-9. Removing the Rear Panel Interconnection PCA To remove the Interconnection PCA. See Figure 5-9. 1. Remove rear handles. 2. Remove the top and bottom covers from the Product. 3. Remove the internal shield. 4.

  • Page 156: Low Voltage Transformer

    96000 Series Service Manual Low Voltage Transformer To remove the low voltage transformer. See Figure 5-9. 1. Remove rear handles. 2. Remove the top and bottom covers. 3. Remove the internal shield. 4. Remove the RF Output PCA. 5. 96270A - Remove the 27 GHz Control PCA.

  • Page 157: Switch Mode Power Supply Module

    Maintenance Disassembly and Reassembly Switch Mode Power Supply Module To remove the SMPS Module, see Figure 5-9: 1. Remove rear handles. 2. Remove top and bottom covers. 3. Remove the internal shield. 4. Remove the RF Output PCA. 5. 96270A - Remove the 27 GHz Control PCA. 6.

  • Page 158: Leveling Head Disassembly Procedure

    96000 Series Service Manual Leveling Head Disassembly Procedure To disassemble a Leveling Head, see Figure 5-11: 1. Carefully peel and remove the overlay from the top portion of the case (top case). 2. Remove the eight top case fixing screws.

  • Page 159: Leveling Head Reassembly Procedure

    Safety Test Perform electrical safety tests as required by local legislation. Fluke Calibration recommends, at a minimum, a check of the continuity from the earth terminal in the Product inlet to all accessible metal parts followed by an electric strength test between mains terminals (L, N) and earth ground.

  • Page 160: Running Self-Test

    96000 Series Service Manual Running Self-Test The subsequent instructions for the self-test are given in terms of button pushes from the front panel. The same instructions can also be initiated with the IEEE 488 instructions in a system environment. Note The Base level self-test can be run with or without a Leveling Head attached.

  • Page 161: Review The Results

    Maintenance Running Self-Test 4. Push the softkey for the desired sequence, All, Base, or Head. Select one of the three sequence options to initiate the test sequence and show a progress-bar screen. On completion of the sequence, the progress bar will clear showing the previous screen with the total number of both Base and Head failures as shown below.
  • Page 162 Service Manual If Self-Test failures are reported, note each failure and the results. Either contact Fluke Calibration or refer to Interpreting the Results for guidance on how to proceed. Table 5-2. Descriptions of the Rows in a Test Failure Display...

  • Page 163: Interpreting The Results

    Maintenance Running Self-Test Interpreting the Results The failure information on the display can assist with isolating a problem to a given PCA. For example, in a case where a single failure occurs, the code letter in the test point name (S, A, H, or M) will indicate which assembly is most likely to be the source of the problem.

  • Page 164: Firmware Upgrade

    96000 Series Service Manual Firmware Upgrade Note The latest version of the firmware is available for download on the Fluke Calibration web site, http://www.flukecal.com. See the Main Product and Support pages to access the download link. Note Do not shut off the power during the firmware installation. The Product can cease functioning if its power is interrupted during the firmware install operation.

  • Page 165: Firmware Installation

    4. Turn on the Product. A yellow screen with an empty progress bar should appear on the screen of the Product. 5. The firmware can be downloaded from the Fluke Calibration website. Execute the file from the download location. Note This firmware update process runs a stand-alone .EXE application...
  • Page 166 96000 Series Service Manual Stage 2 1. Ensure a link has been established between the PC application and the Product. The application status box indicates when a connection is established and the software version of the application. A connection is considered ready when the line Connection Established.

  • Page 167: Lists Of Replaceable Parts

    How to Obtain Parts Electrical components may be ordered from Fluke Calibration and its authorized representatives by using the part number under the heading Fluke Stock No. To order components directly, see “Contact Fluke Calibration”. Parts price information is available from the Fluke Calibration or its representatives.

  • Page 168: Replaceable Parts Lists

    96000 Series Service Manual Replaceable Parts Lists The following tables list the replaceable parts for the 96000 RF Reference Source. Parts are listed by assembly or kit; alphabetized by reference designator. Each assembly is accompanied by an illustration showing the location of each part and its reference designator.
  • Page 169 CABLE DUAL USB & LED 96270A 4593522 KIT COAXIAL CABLE 96270A 4545449 KIT COAXIAL CABLE 96040A 4593365 shown KIT HF LEVELLING 4338617 KIT CONNECTOR 4338656 FUSE 5A 250V 2650730 SMA ATTENUATOR 4196948 96000 Series Manuals CD (includes Operators 4421591 Manual)
  • Page 170 96000 Series Service Manual hpn373eps Figure 6-1. Final Assembly...

  • Page 171: A Performance Test Record

    Appendix A Performance Test Record Performance Test Record Model: 96040A _______________ 96270A_______________ (Base) _______________ (50 Ω) _______________ (75 Ω) _______________ Date: _______________ Temperature _______________ Reference Frequency Accuracy (96040A and 96270A) Use a frequency counter and external frequency reference to make the measurements shown in Table A-1.
  • Page 172 96000 Series Users Manual Frequency Accuracy (96040A and 96270A) Use a high resolution frequency counter, spectrum analyzer and external frequency reference to make the measurements shown in Table A-2. Table A-2. Frequency Accuracy Test Tolerance Frequency Actual (After 24 hour warm-up) ±0.505 mHz...
  • Page 173 Performance Test Record Performance Test Record Harmonics and Spurious Signal Content – Levelling Head (96040A and 96270A) Use a high performance spectrum analyzer to make the measurements shown in Tables A-3 and A-4. Table A-3. Harmonics Test Output Harmonic Harmonic Level Frequency Freq...
  • Page 174 96000 Series Users Manual Table A-4. Spurious Signal Content Test Frequency Spurious Level Limit 2.150 003 GHz < -66 dBc 2.275 003 GHz < -66 dBc 2.425 003 GHz < -66 dBc 2.500 003 GHz < -66 dBc 2.650 003 GHz <...
  • Page 175 Performance Test Record Performance Test Record Modulation (96040A and 96270A, Optional) Use a high performance measuring receiver to make the measurements shown in Tables A-6, A-7, A-8, and A-9. Table A-6. Amplitude Modulation Rate Test Modulation Level Frequency Depth Actual Tolerance Rate ±1 Hz...
  • Page 176 96000 Series Users Manual Frequency Counter Accuracy (96040A and 96270A) Use a frequency standard to make the measurements shown in Tables A-10 and A-11. Table A-10. Frequency Counter Accuracy Test Tolerance Frequency Actual (After 24 hour warm-up) ±0.051 ppm 10 MHz Table A-11.
  • Page 177 Performance Test Record Performance Test Record Ω Level Accuracy - 50 Levelling Head (96040A and 96270A) Use an AC Measurement Standard, a power meter and power sensors, and a high performance spectrum analyzer/measuring receiver to make the measurements shown in Tables A-16 and A-17. Table A-12.
  • Page 178 96000 Series Users Manual Table 12. Level Accuracy (50 Ω) Test (cont). Level Frequency Actual Tolerance ±0.03 dB 1 kHz ±0.03 dB 20 kHz ±0.03 dB 100 kHz ±0.05 dB 10 MHz ±0.05 dB -7 dBm 100 MHz ±0.07 dB 300 MHz ±0.2 dB...
  • Page 179 Performance Test Record Performance Test Record Table 12. Level Accuracy (50 Ω) Test (cont). Level Frequency Actual Tolerance ±0.03 dB 1 kHz ±0.03 dB 20 kHz ±0.03 dB 100 kHz ±0.05 dB 10 MHz ±0.05 dB -37 dBm 100 MHz ±0.07 dB 300 MHz ±0.2 dB...
  • Page 180 96000 Series Users Manual Table 12. Level Accuracy (50 Ω) Test (cont). Level Frequency Actual Tolerance ±0.5 dB 100 kHz ±0.1 dB 10 MHz ±0.1 dB 100 MHz -75 dBm ±0.3 dB 300 MHz ±0.5 dB 1.4 GHz ±1.0 dB 3 GHz ±1.0 dB...
  • Page 181 Performance Test Record Performance Test Record Ω Attenuation Accuracy - 50 Levelling Head (96040A and 96270A) Use a high performance measuring receiver to make the measurements shown in Table A-14 relative to +10 dBm. Table A-14. Attenuation Accuracy (50 Ω) Test Frequency Attenuation Actual...
  • Page 182 96000 Series Users Manual Table A-14. Attenuation Accuracy (50 Ω) Test (cont.) Frequency Attenuation Actual Specification Uncertainty Tolerance 0 dB Reference Reference Reference ±0.02 dB -7 dB ±0.02 dB -17 dB ±0.02 dB -27 dB ±0.02 dB -37 dB ±0.02 dB...
  • Page 183 Performance Test Record Performance Test Record Ω Level Accuracy - 75 Levelling Head (96040A and 96270A) Use an AC Measurement Standard, a power meter and power sensors, and a high performance spectrum analyzer/measuring receiver to make the measurements shown in Tables A-16 and A-17. Table A-16.
  • Page 184 96000 Series Users Manual Table A-16. Level Accuracy (75 Ω) Test (cont.) Level Frequency Actual Tolerance ±0.12 dB 1 kHz ±0.12 dB 20 kHz ±0.12 dB 100 kHz ±0.12 dB 10 MHz -13 dBm ±0.12 dB 100 MHz ±0.15 dB 300 MHz ±0.25 dB...
  • Page 185 Performance Test Record Performance Test Record Table A-16. Level Accuracy (75 Ω) Test (cont.) Level Frequency Actual Tolerance ±0.15 dB 100 kHz ±0.15 dB 10 MHz ±0.15 dB 100 MHz -53 dBm ±0.2 dB 300 MHz ±0.5 dB 1.4 GHz ±0.5 dB 2 GHz ±0.2 dB...
  • Page 186 96000 Series Users Manual Table A-16. Level Accuracy (75 Ω) Test (cont.) Level Frequency Actual Tolerance ±0.7 dB 100 kHz ±0.7 dB 10 MHz ±0.7 dB 100 MHz -81 dBm ±0.7 dB 300 MHz ±1.0 dB 1.4 GHz ±1.0 dB 2 GHz ±0.7 dB...
  • Page 187 Performance Test Record Performance Test Record Ω Attenuation Accuracy - 75 Levelling Head (96040A and 96270A) Use a high performance measuring receiver to make the measurements shown in Table A-18, relative to +10 dBm. Table A-18. Attenuation Accuracy (75 Ω) Test Frequency Attenuation Actual...
  • Page 188 96000 Series Users Manual Table A-18. Attenuation Accuracy (75 Ω) Test (cont.) Frequency Attenuation Actual Specification Uncertainty Tolerance 0 dB Reference Reference Reference ±0.07 dB -3 dB ±0.07 dB -13 dB ±0.07 dB -23 dB ±0.07 dB -33 dB ±0.1 dB...
  • Page 189 Performance Test Record Performance Test Record Level Accuracy - Microwave Output (96270A) Use an AC Measurement Standard, a power meter and power sensors, and a high performance spectrum analyzer/measuring receiver to make the measurements shown in Tables A-20 and A-21. Table A-20.
  • Page 190 96000 Series Users Manual Table A-21. 96270A Non Low Level Microwave Output Option Additional Level Accuracy Test Points Level Frequency Actual Typical Tolerance ±0.5 dB 1 kHz ±0.5 dB 100 kHz ±0.5 dB 10 MHz ±0.5 dB 100 MHz ±0.5 dB...
  • Page 191 Performance Test Record Performance Test Record Level Accuracy - Low Level Microwave Output Option Additional Points (96270A) Use an AC Measurement Standard, a power meter and power sensors, and a high performance spectrum analyzer/measuring receiver to make the measurements shown in Table A-22. Table A-22.
  • Page 192 96000 Series Users Manual 96270A Low Level Microwave Output Option Level Accuracy Additional Level Accuracy Test Points (cont). Level Frequency Actual Typical Tolerance ±2.0 dB 1 kHz ±2.0 dB 100 kHz ±2.0 dB 10 MHz ±2.0 dB 100 MHz ±2.0 dB...
  • Page 193 Performance Test Record Performance Test Record 96270A Low Level Microwave Output Option Level Accuracy Additional Level Accuracy Test Points (cont). Level Frequency Actual Typical Tolerance ±2.0 dB 100 kHz ±2.0 dB 10 MHz ±2.0 dB 100 MHz ±2.0 dB 1 GHz ±2.0 dB -66 dBm 4.024 GHz...
  • Page 194 96000 Series Users Manual Frequency Accuracy – Microwave Output (96270A) Use a high resolution frequency counter, spectrum analyzer and external frequency reference to make the measurements shown in Table A-23. Table A-23. Frequency Accuracy Test Tolerance Frequency Actual (After 24 hour warm-up) ±0.5 Hz...
  • Page 195 Performance Test Record Performance Test Record Harmonics, Spurious, and Sub-Harmonic Content – Microwave Output (96270A) Use a high performance spectrum analyzer to make the measurements shown in Tables A-24 and A-25. Table A-24. 96270A Microwave Output Harmonics Test Output Harmonic Harmonic Level Frequency...
  • Page 196 96000 Series Users Manual Table A-25. 96270A Microwave Output Sub and Inter-Harmonics Test Output Sub/Inter-Harmonic Level Frequency Frequency Actual Frequency Actual Frequency Actual Limit 4.05 GHz 6.075 GHz < -60dBc 6.2 GHz 9.300 GHz < -60dBc 8.3 GHz 4.150 GHz 6.225 GHz...
  • Page 197 Performance Test Record Performance Test Record Table A-29. 96270A Microwave Output Frequency Modulation Deviation Test Modulation Level Frequency Deviation Actual Tolerance Rate ±300 Hz 400 Hz 10 kHz ±300 Hz 100 kHz 10 kHz 125 MHz ±9.0 kHz 400 Hz 300 kHz +13 dBm ±9.0 kHz...
  • Page 198 96000 Series Users Manual CalPlus GmbH CalPlus GmbH Niederlassung Hamburg Zentrale Berlin Normannenweg 30 • 20537 Hamburg Heerstraße 32 • 14052 Berlin Tel.: 040 3039595-0 • Fax: 040 3039595-50 Tel.: 030 214982-0 • Fax: 030 214982-50 scopeshop@calplus.de • www.calplus.de office@calplus.de • www.calplus.de...

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