GW Instek GSP-810 Service Manual
  1. Manuals
  2. Brands
  3. GW Instek Manuals
  4. Measuring Instruments
  5. GSP-810
  6. Service manual
GW Instek GSP-810 Service Manual

GW Instek GSP-810 Service Manual

1000mhz spectrum analyzer
Hide thumbs Also See for GSP-810:
Table of Contents

Advertisement

Quick Links

Download this manual
GSP-810
1000MHz Spectrum Analyzer
Service Manual
Preliminary
I S O- 9 0 0 1 CE R TI F I E D
MA NUF A CTURER

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GSP-810 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for GW Instek GSP-810

Summary of Contents for GW Instek GSP-810

  • Page 1 GSP-810 1000MHz Spectrum Analyzer Service Manual Preliminary I S O- 9 0 0 1 CE R TI F I E D MA NUF A CTURER...

  • Page 2: Table Of Contents

    1000MHz Spectrum Analyzer Service Manual -Preliminary Table of Contents Pages 1.0 GENERAL............................5 2.0 SPECIFICATIONS..........................5 3.0 OPERATION THEORY ........................6 3.1 G ........................6 ENERAL ESCRIPTION 3.2 RF M ............................6 ODULE 3.3 IF ............................6 MODULE 3.4 D ..........................
  • Page 3 1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.3 I RV5..................20 NTERNAL ALIBRATOR EVEL BY 5.2.4 LO1 P RV4, RF M ................ 21 HASE DJUST BY ODULE 5.2.5 LO2 P RV6, RF M ................ 23 HASE DJUST BY ODULE 5.2.6 L RV2, IFP M ..................
  • Page 4 1000MHz Spectrum Analyzer Service Manual -Preliminary 9.1 G ............................77 ENERAL 9.2 ATE ......................77 SYSTEM CONFIGURATION 9.3 E ........................77 QUIPMENT EQUIRED 10.0 SYSTEM DIAGNOSIS........................79 10.1 S ......................79 YSTEM OWER 10.2 S ................79 YSTEM OFTWARE AND IRMWARE EVISION 10.3 S...
  • Page 5 1000MHz Spectrum Analyzer Service Manual -Preliminary 14.1 RF PCB ......................91 PART PLACEMENT 14.2 IF PCB ......................92 PART PLACEMENT 14.3 K ................. 93 EYBOARD AND ISPLAY PART PLACEMENT 14.4 TG PCB ......................94 PART PLACEMENT 14.5 P ..................95 OWER ETER PART PLACEMENT...

  • Page 6: General

    1000MHz Spectrum Analyzer Service Manual -Preliminary 1.0 General The purpose of this document is to define the specifications, operation and recommended testing for the Spectrum Analyzer GSP810 systems. 2.0 Specifications Specifications are subject to change without notice. Refer to Goodwill Instrument Co., LTD.

  • Page 7: Operation Theory

    1000MHz Spectrum Analyzer Service Manual -Preliminary 3.0 Operation Theory 3.1 General Description GSP810 is basically composed of RF, IF and Display module for basic unit. Tracking Generator and Power meter are the optional modules. The system interconnection and block refer to pargraph 4. 3.2 RF Module RF module converts the 150kHz to 1GHz input signal to 10.7MHz IF signal for IF module.

  • Page 8: Block Diagram

    1000MHz Spectrum Analyzer Service Manual -Preliminary 4.0 Block Diagram The block diagram of RF, IF and TG modules are as following figures.: 4.1 System interconnection GSP810 InterterConnection.pdf  ...

  • Page 9: Rf Module Block Diagram

    1000MHz Spectrum Analyzer Service Manual -Preliminary 4.2 RF module block diagram GSP810 RF Block_Diagram.pdf  ...

  • Page 10: If Module Block Diagram

    1000MHz Spectrum Analyzer Service Manual -Preliminary 4.3 IF module block diagram GSP810 IF Block_Diagram.pdf  ...

  • Page 11: Adjustments

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.0 Adjustments 5.1 General Description 5.1.1 Hazards and Warnings. Warning: Covers of Unit should be removed by authorized personel only. Warning: Hazardous voltages and conditions exist with covers removed. Warning: System power supply has hazardous voltages exposed. Warning: Removal of module shields may cause damage, invalidate calibration and/or performance of the unit, requiring factory service.

  • Page 12: Location Of Adjustments And Internal Test Points

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.3 Location of Adjustments and Internal Test Points. 5.1.3.1 Front Panel System Adjustments Item Description Cathode Ray Tube (CRT) Display, 8 x 10 graticule, 5 inch Liquid Crystal Display (LCD), 4 line x 20 character Keypad, field selection and data entry Spinner, field selection and data change RF Input, Coaxial, Type N Female...

  • Page 13: Rear Panel System Adjustments

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.3.2 Rear Panel System Adjustments Item Description Panel Label, Usage Warning External Frequency Reference Input, BNC (optional) Connector, DB9, Female, RS-232 Panel Label, Serial Number Cooling Fan Vent Adjustment, CRT Trace Rotation, potentiometer Adjustment, Internal Frequency Reference , potentiometer Adjustment, LCD Contrast, potentiometer Panel Label, Input Voltage AC Input, Connector, Voltage Select and Fuse...

  • Page 14: Internal View

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.3.3 Internal View TG COMPONENT SIDE RF Solder Side (23) IFP Module Block Tracking Generator Type-N RF Module Cover Connector A. KRAUSKA 10/25/1999 5.1.3.4 RF Module LO2 Phase lock adjustment CAL LVL COMPONENT SIDE VIEW Frequency adjustment LO1 Phase lock adjustment...

  • Page 15: If Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.3.5 IF Module (23) 5.1.3.6 Display/Power Module VR 101 VR202 Y-GAIN SWEEP-ADJ VR303 ASTIG VR 301 SUB-INTEN VR 401 CAUTION +5V-ADJ CRT CIRCUIT HIGH VOLTAGE PRESENT UNDER THIS SHIELD. VR 401 +5V-ADJ  ...

  • Page 16: Tracking Generator Option

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.3.7 Tracking Generator Option 5.1.3.8 Power Meter Option  ...

  • Page 17: Removing And Installing Module Shields

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.1.4 Removing and Installing Module Shields Shield Plate over RF Module is located under the system bottom cover removed in section 5.1.2 The plate is supported by six hex spacers and attached by six cross head screws. Once the screws are removed, the shield plate may be removed, as well as the metal tape packing under the plate.
  • Page 18 1000MHz Spectrum Analyzer Service Manual -Preliminary 10dB, the system response does not change by 10dB Noise Floor System noise is too high Adjust RV3, RV4 and possibly RV1 and RV2 on Intermodulation Third Order Adjust RV2 on the IFP to Intermodulation Products increase signal, and then are too large and noise floor...

  • Page 19: System Adjustments

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2 System Adjustments The system adjustments should be made only after verification of the need for adjustments. Most of the system adjustments require that covers be removed from the unit, as well as from modules. See last section. 5.2.1 Frequency Adjust by Rear Panel Adjustment Adjustment Connection...

  • Page 20: Requency Djust By Rv2 , Rf Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.2 Frequency Adjust by RV2 , RF Module Adjustment Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 5.2 Procedure 1. Remove outer case of unit per section 5.1.2 2. Remove shield plate covering RF module per section 5.1.2, but do not remove any smaller shields from the RF module.

  • Page 21: Internal Calibrator Level By Rv5

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.3 Internal Calibrator Level by RV5. Adjustment Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 5.3 Procedure 1. Apply known accurate external signal from a signal generator at recommended level of –30.5dBm, 80 MHz. Making sure the internal Calibrator signal is down.

  • Page 22: Lo1 Phase Lock Adjust By Rv4, Rf Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.4 LO1 Phase Lock Adjust by RV4, RF Module Adjustment Connection 150kHz~1000MHz Fig. 5.4 Procedure 1. Remove outer case of unit and shield plate covering RF module per section 5.1.2 2. Remove per section 2.5. 3.
  • Page 23 1000MHz Spectrum Analyzer Service Manual -Preliminary 13. Check phase noise at 80MHz: 14. Set center frequency to 80MHz. 15. Set span to 10kHz/division 16. Place marker one on the peak of the signal using peak search. Press shift PK->MKR. 17. Place the second marker at 30 kHz greater than marker 1, typically 80.030MHz.

  • Page 24: Lo2 Phase Lock Adjust By Rv6, Rf Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.5 LO2 Phase Lock Adjust by RV6, RF Module Adjustment Connection 150kHz~1000MHz Fig. 5.5 Procedure 1. Remove outer case of unit and shield plate covering RF module per section 5.1.2 2. Remove smaller shields from the second LO section of the RF module.

  • Page 25: Level Adjust Via Rv2, Ifp Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.6 Level Adjust via RV2, IFP Module Adjustment Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 5.6 Procedure 1. Only the system top cover must be removed to make this adjustment. 2. No module shields or covers must be removed to make this adjustment.
  • Page 26 1000MHz Spectrum Analyzer Service Manual -Preliminary 100kHz/div, 500kHz/div, 10MHz/div are recommended reference spans) 9. Set the center frequency to match the input signal frequency. 10. Set the marker to match the input frequency. 11. Adjust the marker frequency or the frequency of the externally applied signal, so that the marker is centered on the peak of the signal.

  • Page 27: Linearity Adjust Via Rv1, Ifp Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.7 Linearity Adjust via RV1, IFP Module Adjustment Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 5.7 Procedure 1. Only the system top cover must be removed to make this adjustment. 2. No module shields or covers must be removed to make this adjustment.

  • Page 28: Level Adjust By Rv3 And Rv4, Ifp Module

    1000MHz Spectrum Analyzer Service Manual -Preliminary 5.2.8 Level Adjust by RV3 and RV4, IFP Module Adjustment Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 5.8 Procedure 7. Only the system top cover must be removed to make this adjustment.
  • Page 29 1000MHz Spectrum Analyzer Service Manual -Preliminary 18. Set the center frequency to match the input signal frequency. 19. Set the marker to match the input frequency. 20. Adjust the marker frequency or the frequency of the externally applied signal, so that the marker is centered on the peak of the signal.

  • Page 30: Basic Unit Test Plan

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.0 Basic Unit Test Plan The required verification equipment list is as following. Quantity Description or Specification Possible Manufacturer and Model Number RF Signal Generator Agilent 8648C 10MHz to 1.25GHz Power to +10dBm Pulse Modulation Option Phase Noise<-100dBc/Hz@10kHz offset Output Return Loss <-15dBRL High Stability option, if a local standard is...
  • Page 31 1000MHz Spectrum Analyzer Service Manual -Preliminary Semirigid coaxial cable .085 diameter 1.25m long. Return loss <-22 dBRL to 1.15GHz Various Type N to SMA Adapters depending on the type of attenuators and the connector on the semirigid cable. Note: Absolutely no BNC connectors should be used. ...

  • Page 32: Log Accuracy, Bandwidth Agreement, Noise Floor

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.1 Log Accuracy, Bandwidth Agreement, Noise Floor Purpose To verify the accuracy of the log amplifier over 70dB, verify that each of the bandwidth selections for RBW produce the same signal level and to measure the noise floor of each RBW selection.

  • Page 33: Calibration Of Attenuators

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.1.1 Calibration of Attenuators Purpose Calibrate four attenuators to 0.2dB accuracy for future testing Testing Connection Detailed Method 1. Calibrate network analyzer for transmission and reflection measurements. 10 MHz to 1GHz. 2. To test every attenuator and record the S11 and S21 of frequency 50M, 80M, 100M, 200M, 300M, 400M, 500M, 600M, 700M, 800M, 900M and 1000M.
  • Page 34 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.1.1 S21 record of Attenuation Attenuation 10dB 20dB 10dB+ 40dB 10dB+ 20dB+ 10dB+ Total 20dB 40dB 40dB 20dB+ Frequency 40dB 100M 200M 300M 400M 500M 600M 700M 800M 900M 1000M  ...

  • Page 35: Measurement Of Log Accuracy

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.1.2 Measurement of Log Accuracy. Purpose Measure Spectrum Analyzer log accuracy. General Method A signal reference shall be established with a signal generator and power meter. Care will be taken to insure good equipment VSWR for consistency of measurements.
  • Page 36 1000MHz Spectrum Analyzer Service Manual -Preliminary Frequency Reading of Power Meter Adjustment of Signal Generator amplitude 50MHz -10dBm Table 6.1.2 Testing Transmission loss at 50MHz, 80MHz, 100MHz, and 100MHz Connection of increments to 1GHz. Return loss to 1GHz. Log Accuracy Signal Generator DUT, GSP810 150kHz~1000MHz...
  • Page 37 1000MHz Spectrum Analyzer Service Manual -Preliminary 4. Increase the span to 100kHz/div and note the RBW is now 30kHz. Adjust the generator frequency in 1kHz increments until the peak response of the 30kHz filter is found. Record both the frequency and the marker reading noted for this condition.
  • Page 38 1000MHz Spectrum Analyzer Service Manual -Preliminary 10MHz/div for RBW’s of 3kHz, 30kHz, 220kHz and 4MHz. This is the noise floor for each filter selection. Averaging for the markers must be used and the operator must wait after changing RBW on the DUT. Interpretation of 1.
  • Page 39 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.1.3 SG Adjustment: Actual Signal SPAN(RBW) Power Level Attenuation 10KHz 100KHz 1MHz 10MHz (3K) (30K) (220K) (4M) 10dB 20dB 10+20dB 40dB 10+40dB 20+40dB 10+20+40dB (1) SG Adjustment is the record of 6.1.2.1. (2) Actual signal power level is resulted by subtraction of SG Adjustment and attenuation table of 6.1.1, row of 50MHz.
  • Page 40 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.1.5 Noise floor SPAN(RBW) 10KHz(3K) 100KHz(30K) 1MHz(220K) 10MHz(4M) dBm reading dBm/Hz  ...

  • Page 41: Error Of Internal Reference Calibrator

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.1.3 Error of Internal Reference Calibrator Purpose Verify that the internal calibrator signal is accurate. Testing Connection Signal Generator DUT, GSP810 150kHz~1000MHz Attenuator 3dB Attenuator, 10dB, Power Meter -3.18 Sensor Fig. 6.1.4 General Method RF Substitution method. Turn on the calibrator, note the marker value, and apply an accurate signal that matches the noted marker reading.
  • Page 42 1000MHz Spectrum Analyzer Service Manual -Preliminary semi-rigid cable from the attenuator, connected to another attenuator(20dB), connect the 20dB attenuator to the DUT input. 3. Apply –10dBm at 80MHz on the signal generator(CW, no modulation). Adjust the power of the signal generator until the voltage read on the marker matches that found by the internal calibrator in the previous step.

  • Page 43: Attenuation Error, Frequency Flatness

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.2 Attenuation Error, Frequency Flatness Purpose Verify the accuracy of the spectrum analyzer DUT when input frequency is changed and when the reference level setting (DUT attenuator) is changed. Testing Configuration Signal Generator DUT, GSP810 150kHz~1000MHz Attenuator Attenuator,...

  • Page 44: Interpretation Of Results

    1000MHz Spectrum Analyzer Service Manual -Preliminary power level eliminates dynamic range errors from the measurement. The fixed attenuators are more repeatable than an electronic step attenuator based on relays. Measuring the signal level at 10dB less than the reference level for each setting eliminates DUT errors due to log accuracy, and makes the measurement independent of any errors found in test 3.2 Detailed Method 1.
  • Page 45 1000MHz Spectrum Analyzer Service Manual -Preliminary (10MHz/div), the error should be less than ±1.5dB. Test Record Table 6.2.1 Table 6.2.2 Table 6.2.3 Table 6.2.1 Power meter reading for reference Reference Level 40dB Attenuator. 10dB 20dB 10+20dB 10+40dB 29.66 39.61 49.44 Low Pass 9.83 19.83...
  • Page 46 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.2.2 DUT reading Reference Level Attenuator. 10dB 20dB 10+20dB 40dB 10+40dB Low Pass 9.83 19.83 29.66 39.61 49.44 Actual Filter Attenuation 100MHz 50 MHz 80 MHz 100 MHz 200MHz 200 MHz 300 MHz 450MHz 400 MHz 1200MHz...
  • Page 47 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.2.3 Result of calculation Reference Error Level (PK-PK)/2 Attenuator. 10dB 20dB 10+20dB 40dB 10+40dB Low Pass 9.83 19.83 29.66 39.61 49.44 Actual Filter Attenuation 100MHz 50 MHz 80 MHz 100 MHz 200MHz 200 MHz 300 MHz 450MHz 400 MHz...

  • Page 48: Spurious. < -90Dbm., -30Dbm Reference Level

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.3 Spurious. < -90dBm., -30dBm reference level Purpose Measure spurious signals that appear on the spectrum analyzer display when no input signals are present. Validate that all spurious levels, if they exist are close to the noise floor. Technically the noise floor of the 220kHz RBW at –86dBm at –30dBm reference level is marginally able to read a –90dBm spurious, but typically the noise is 10dB better than this, so we...
  • Page 49 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.3 Spurious Frequency Level (dBm) Frequency Level (dBm) 1000  ...

  • Page 50: Intermodulation

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.4 Intermodulation Purpose Measure spurious products that appear on the spectrum analyzer when two input signals are present. Measure products produced by intermodulation two signals producing additional frequencies. Testing Configuration 150kHz~1000MHz Combiner Fig. 6.4 General Method Apply two signals using two signal generators.
  • Page 51 1000MHz Spectrum Analyzer Service Manual -Preliminary 5. Set the signal generator 1 to about – 4dBm and to the frequency listed on the data sheet. Adjust the level of the generator until the displayed signal just touches the –20dBm reference level line. 6.
  • Page 52 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.4 Intermodulation spur(dBc) spur(dBc) Convert to -40dBm input level  ...

  • Page 53: Spurious Response To Single Tone And Sideband Noise

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.5 Spurious Response to Single Tone and Sideband Noise Purpose Measure spurious signals that exist with a single input signal present. These include phase noise, harmonics, and sideband related spurious. Testing Configuration Signal Generator DUT, GSP810 150kHz~1000MHz Filter...
  • Page 54 1000MHz Spectrum Analyzer Service Manual -Preliminary 3. Set the DUT to the second harmonic (2*fundamental) and note the power level in dBc down from the top of screen. Record the dBc value on the chart (dBc = dB relative to carrier.
  • Page 55 1000MHz Spectrum Analyzer Service Manual -Preliminary 5. 3000*1.15 is the equivalent noise bandwidth of the 3kHz filter. 6. “2.5” is a “magic” number that relates several factors including the effect of averaging a noisy signal after processing by a log amplifier. If the input signal is not noisy or if the noise is not gaussian, the 2.5 factor is invalid.
  • Page 56 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.5.1 Harmonics Spurs and Sideband Noise Input Freq.(MHz) Fund. Level 2nd Harm. 3rd harm. 30KHz SB 1MHz SB (dBm) (dBm) (dBm) Reading(dBm) Reading(dBm) LPF 100M LPF 450M 1200M Table 6.5.2 Result of calculation in dBc Input Freq.(MHz) 2nd Harm.

  • Page 57: Frequency Accuracy- Center And Span

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.6 Frequency Accuracy- Center and Span. Purpose Measure the accuracy of the unit. Testing Connection Signal Generator DUT, GSP810 150kHz~1000MHz Filter Attenuator, 10dB, Fig. 6.6 General Method 1. The accuracy of the instrument is +/-10ppm which is 100Hz at 10MHz input frequency and the allowable error is 10kHz at 1GHz.
  • Page 58 1000MHz Spectrum Analyzer Service Manual -Preliminary 2. Calibrate the DUT for horizontal and vertical alignment as explained in the operator’s manual. The internal 80MHz calibrator should be used for this purpose to insure the horizontal baseline is precisely calibrated, The 2kHz/div sweep should be used for the calibration.

  • Page 59: Rbw: Bandwidth Accuracy

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.7 RBW: Bandwidth Accuracy Purpose The purpose of this test is to measure the 3dB points of the resolution bandwidth filters used for various spans. This bandwidth must be within +/-15% of the specified bandwidth of 3kHz, 30kHz, 220kHz, 4MHz.
  • Page 60 1000MHz Spectrum Analyzer Service Manual -Preliminary the peak occurs. 6. Connect a 3dB precision attenuator. Note the marker response in this case. 7. Remove the 3dB attenuator. 8. Vary the generator frequency upwards until the 3dB response marker reading is duplicated to within .1dB. Record this generator frequency as the upper frequency.

  • Page 61: Vswr Test

    1000MHz Spectrum Analyzer Service Manual -Preliminary 6.8 VSWR Test Purpose Verify the measurement of input impedance match. Testing Connection Network Analyzer 150kHz~1000MHz Fig. 6.8 General Method Front end circuitry will dominate the input impedance. Front end consists of limiters and attenuators. Changing reference level is changing the attenuator combinations.
  • Page 62 1000MHz Spectrum Analyzer Service Manual -Preliminary Table 6.8 VSWR Reference Level VSWR 20dBm 10dBm 0dBm -10dBm -20dBm -30dBm  ...

  • Page 63: Tg Test And Installation Procedure

    1000MHz Spectrum Analyzer Service Manual -Preliminary 7.0 TG Test and Installation procedure 7.1 General The purpose of this test plan is to provide instructions for aligning, and verifying the performance of a Tracking Generator Module. 7.2 Test Equipment Required Description Key Specifications 3.5 digit minimum Spectrum Analyzer w/Tracking...

  • Page 64: 4Mhz Filter Alignment

    1000MHz Spectrum Analyzer Service Manual -Preliminary 7.4.2 4MHz Filter Alignment 1. Remove C71, and solder center conductor of coax to pad nearest R120, and solder coax ground to nearby ground pad. 2. Remove R119, and solder center conductor of a second coax to pad nearest C59, and solder coax ground to nearby ground pad.

  • Page 65: Functional Verification

    1000MHz Spectrum Analyzer Service Manual -Preliminary 7.4.3 Functional Verification 1. Install Tracking Generator module into test bed, without shields. 2. Connect 3 , and 2 LO coaxes. 3. Apply power to unit, and configure unit as follows: Spectrum Analzyer: Center Frequency: 80MHz Span: 0 Hz/div Tracking Generator:...
  • Page 66 1000MHz Spectrum Analyzer Service Manual -Preliminary Center Frequency: 80MHz Span: 0 Hz/div Tracking Generator: Status: Output Level: 00 dBm Frequency offset: 00kHz. 11. Using the marker on the spectrum analyzer, verify that when the Tracking Generator output level is adjusted in 10dB steps that each step is within ±1dB. 12.

  • Page 67: Installation

    1000MHz Spectrum Analyzer Service Manual -Preliminary 7.5 Installation 1. Remove RF, and IF PCB's from unit. RF COMPONENT SIDE VIEW R256 Tracking Generator Mounting Hole Fig 7.2 2. Remove 50 ohm resistor (R169) on 1 LO output on the RF board, (see figure 7.2). Also refer to section 14.1 for searching R169 if necessary.

  • Page 68: Final Calibration

    1000MHz Spectrum Analyzer Service Manual -Preliminary 7.6 Final Calibration 1. Power unit up, and configure as follows: Spectrum Analzyer: Center Frequency: 80MHz Span: 0 Hz/div Tracking Generator: Status: Output Level: 00 dBm Frequency offset: 00kHz. 2. Connect Power Meter to Tracking Generator output. 3.

  • Page 69: Power Meter Test And Installation Procedure

    1000MHz Spectrum Analyzer Service Manual -Preliminary 8.0 Power Meter Test and Installation Procedure 8.1 General The purpose of this test plan is to provide instructions for aligning, and verifying the performance of optional Power Meter. 8.2 Test Equipment Required Description Key Specifications 3 1/2 digits minimum Oscilloscope...

  • Page 70: Verification Of Test Setup

    1000MHz Spectrum Analyzer Service Manual -Preliminary 8.3 Test Setup 8.3.1 Verification of Test setup This verification should be performed for all of the following cases: • Initial setup of equipment. • A different RF Generator, or amplifier is used. • Either the RF Generator, or the Amplifier is suspect of improper operation. •...

  • Page 71: Calibration Of Test Setup

    1000MHz Spectrum Analyzer Service Manual -Preliminary 8.3.2 Calibration of Test setup Calibration of the DUT power meter with this procedure is accurate, only if the signal generator, and the amplifier are stable, and at operating temperature when the test setup calibration is performed. If testing for extended periods of time (longer than 4 hours), this calibration must be repeated.
  • Page 72 1000MHz Spectrum Analyzer Service Manual -Preliminary Signal Generator DUT, GSP810 150kHz~1000MHz 12.0 0.50 Attenuator OUTPUT Filter Power Meter -3.18 Sensor Fig 8.1 Test setup of power meter test  ...
  • Page 73 1000MHz Spectrum Analyzer Service Manual -Preliminary Frequency Low Pass Power Actual Attenuatio Band Range Cal Value (MHz) Filter Level Power n Setting 1300 1300 10mW 1300 50mW 10mW 20mW 50mW 200mW 10mW 20mW 50mW 200mW 10mW 20mW 50mW 200mW NLP 300 10mW 20mW NLP 300...
  • Page 74 1000MHz Spectrum Analyzer Service Manual -Preliminary 1710 10mW 20mW 1710 50mW 200mW 1760 10mW 20mW 1760 50mW 200mW 1790 10mW 20mW 1790 50mW 200mW 1820 10mW 20mW 1820 50mW 200mW 1850 10mW 20mW 1850 50mW 200mW 1880 10mW 20mW 1880 50mW 200mW 1910...

  • Page 75: Procedure

    1000MHz Spectrum Analyzer Service Manual -Preliminary 8.4 Procedure 8.4.1 Hardware Calibration 1. Center RV1 (on Power Meter option board), and adjust RV1 (RF board) for 12 mVDC, +/-3mV as measured on TP3. 2. Connect the unit under test setup as shown in Figure 8.1. 3.
  • Page 76 1000MHz Spectrum Analyzer Service Manual -Preliminary Frequency Low Pass Power Actual Attenuation Readin Range (MHz) Filter Level Power Setting 10mW 20mW 50mW 200mW 10mW 20mW 50mW 200mW 10mW 20mW 50mW 200mW NLP 300 10mW 20mW NLP 300 50mW 200mW 10mW 20mW 50mW 200mW...
  • Page 77 1000MHz Spectrum Analyzer Service Manual -Preliminary 1760 10mW 20mW 1760 50mW 200mW 1790 10mW 20mW 1790 50mW 200mW 1820 10mW 20mW 1820 50mW 200mW 1850 10mW 20mW 1850 50mW 200mW 1880 10mW 20mW 1880 50mW 200mW 1910 10mW 20mW 1910 50mW 200mW 1940...

  • Page 78: Ate For Performance Tests

    1000MHz Spectrum Analyzer Service Manual -Preliminary 9.0 ATE for performance tests 9.1 General The purpose of ATE performance test system is to minimize test time. Because the wide dynamic range of this spectrum analyzer, it will spend very long time to change the attenuation combination.
  • Page 79 1000MHz Spectrum Analyzer Service Manual -Preliminary Note: 1. The actual length of RF cable (8), (9) will depends on the final configuration. 2. A Network analyzer is necessary for calibrating item (1), (2), (3) and attached cables combination. 3. A 1GHz Spectrum analyzer not included is used for Tracking Generator “spurious noise”...

  • Page 80: System Diagnosis

    1000MHz Spectrum Analyzer Service Manual -Preliminary 10.0 System Diagnosis 10.1 System Power On Test Apply power to system and turn on power switch. System CRT display will be frozen briefly, and then begin updating normally after a few seconds. LCD display will change after power on, and will change in response to keyboard actions.

  • Page 81: System Synthesizer Test Lo1

    1000MHz Spectrum Analyzer Service Manual -Preliminary complete. 10.4 System Synthesizer Test LO1 Shift Setup Press Use Spinner to select Synthesizer test LO1. Read display. If unlocked is reported, use the LED on RF board or use subsequent tests in menu to isolate faults. Shield 12(LO1 PLL) must be removed to see the LED D8.

  • Page 82: Manual System Test, Signal Integrity

    1000MHz Spectrum Analyzer Service Manual -Preliminary 10.7 Manual System Test, Signal Integrity Disconnect any signal, cable or adapter from the RF input of the unit. Shift Setup Press The cursor will be positioned on the first menu item, internal calibrator. Press the to turn the calibrator from off to on, if the calibrator is not already on.

  • Page 83: Phase Lock Test At Any Frequency

    1000MHz Spectrum Analyzer Service Manual -Preliminary Set the reference level to –20dBm by pressing and using REF LVL Place one marker on the peak of the signal (79.999MHz to 80.001MHz) using Shift Pk->MKR the peak search function. Press Place the second marker at 30 kHz greater than marker 1, 80.030MHz typically. Press , and use to select the second marker, press the desired...

  • Page 84: Troubleshooting Information

    1000MHz Spectrum Analyzer Service Manual -Preliminary 11.0 Troubleshooting Information 11.1 No signal but only Noise Displayed 1. Check if internally calibration signal exists. Push SHIFT, RBW keys to enter SETUP function. Select to control item 1. SIGNAL REF. by rotating spinner. Use RIGHT ARROW key to turn the Cal.

  • Page 85: Lot Of Spurs Over The Display At Full Span

    1000MHz Spectrum Analyzer Service Manual -Preliminary 11.4 Lot of spurs over the display at full span. Enter the SETUP function to turn down the internally calibrating signal. Refer to 11.1. Explanation: The 80MHz calibrating signal is an unwell-filtered signal. It contains harmonics and sub-harmonics signal of 80MHz.

  • Page 86: Dll File Description

    The following is a description of each command: 12.1 GetSerialNum A call to this routine will return the serial number of the GSP-810 as a long integer. This is also a good routine to call to verify proper RS-232 communications with the GSP-810.

  • Page 87: Set Reflvl

    30 kHz 220 kHz 4 MHz Note that the RBW can only be set directly when the GSP-810 is in zero span. Incorrect settings will be ignored by the GSP-810. Returned values should be ignored. 12.4 SetReflvl A call to this routine will set the Reference Level to the value passed in as a long integer.

  • Page 88: Changecomport

    A call to this routine will change to the com port passed in as a long integer. The expected values are 1, 2, 3, or 4 for com ports 1-4, respectively. The other parameters normally configurable for RS-232 ports are setup automatically for the GSP-810. 12.7 GetAnalyzerTraceData(LPSAFEARRAY FAR *);...

  • Page 89: Marker Functions

    A return value of 1 indicates success. A return value of 0 indicates a failure while attempting to read from the GSP-810. If a failure occurs, the delay could be as long as 30 seconds. This normally occurs if the serial cable is not hooked up or the GSP-810 is not powered up.

  • Page 90: Software Upgrade Procedure

    1000MHz Spectrum Analyzer Service Manual -Preliminary 13.0 Software Upgrade Procedure The unit allows user to update the revised software by downloading through RS232 interface. The tools for the procedure are as following: (1) RS 232 cable (2) Downloading program (Btld.exe, supported by manufacturer) (3) Switch adapter for switching the pin1 connection.

  • Page 91: Download Procedures

    1000MHz Spectrum Analyzer Service Manual -Preliminary 13. 2 Download procedures (1) Turn UNIT off. (2) Connect the system as fig.2. (3) Set the SW of adapter to “program” mode then turn UNIT power on. In program mode, the LCD won’t display normally. (4) Execute the download program btld.exe under DOS environment.

  • Page 92: Part List

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.0 Part list 14.1 RF PCB part placement GSP810 RF PCB Part_REF.pdf  ...

  • Page 93: If Pcb Part Placement

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.2 IF PCB part placement GSP810 IF PCB Part_REF.pdf  ...

  • Page 94: Keyboard And Display Pcb Part Placement

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.3 Keyboard and Display PCB part placement Keyboard PCB GSP810 KB PCB Part_REF.pdf Display PCB GSP810 PS&DSPY PCB_REF.pdf  ...

  • Page 95: Tg Pcb Part Placement

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.4 TG PCB part placement GSP810 TG PCB Part_REF.pdf  ...

  • Page 96: Power Meter Pcb Part Placement

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.5 Power Meter PCB part placement  ...

  • Page 97: Mechanical Assembly

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.6 Mechanical Assembly  ...

  • Page 98: Part List

    1000MHz Spectrum Analyzer Service Manual -Preliminary 14.7 Part List GSP810 Part List.pdf  ...

Table of Contents