HP 8560A - Manuals

Contents 1. General Information Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . Manual Text Conventions . . . . . . . . . . . . . . . . . . . . . . . Serial Numbers Covered by This Manual . . . . . . . . . . . . . . . . . Instrument Variations . . . . . . . . . . . . . . . . . ...

6. General Troubleshooting Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Assembly Level Text . . . . . . . . . . . . . . . . . . . . . . . . Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . Assembly Test Points . . . . . . . . . . . . . . . . . . . . . . ...

12. Display/Power Supply Section Troubleshooting Using the TAM . . . . . . . . . . . . . . . . . . . . Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Distortion . . . . . . . . . . . . . . . . . . . . ...

Figures l-1. Serial Number Label Example . . . . . . . . . . . . . . . . . . . . l-2. Example of a Static-Safe Workstation . . . . . . . . . . . . . . . . . 1-3. HP 8560A Shipping Container and Cushioning Materials . . . . . . . . . 2-1. High-Voltage Power Supply Adjustment Setup . . . . . . . . . ....

Tables l-l. Service Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . l-2. Static-Safe Accessories . . . . . . . . . . . . . . . . . . . . . . . . l-3. Hewlett-Packard Sales and Service Offices . . . . . . . . . . . . . . . 1-4. Recommended Test Equipment . . . . . . . . . . . . . . . . ....

General Information This HP 8560A Spectrum Analyzer Service Manual contains information required to adjust and service the HP 8560A Spectrum Analyzer to the assembly level. For component-level information, refer to the HP Spectrum Analyzer Component Level Information. Manual Organization Chapter 1, ...

Manual Text Conventions The following text conventions are used throughout this manual: Boxed text in this typeface represents a mechanical key physically located on the instrument. Softkeys Shaded text indicates a labels appear on the display and can be activated by pressing corresponding keys surr...

Instrument Variations The following text lists the unique assemblies contained in the HP 8560A Options 001, 002,003, and all combinations. HP 8560A Option 001 (Rear-Panel 2nd IF Output) Al5 RF Assembly unique part number added Rear-panel added HP 8560A Option 002 (Tracking Generator) A10 Tracking Ge...

HP 85629B Test and Adjustment Module When attached to the spectrum analyzer’s rear panel, the HP 85629B Test and AdjustmentModule (TAM) p rovides diagnostic functions for the HP 8560A. Because the TAM connects directly to the analyzer’s internal data and address bus, it controls the analyzer’s hardw...

Electrostatic Discharge Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore,all work performed on assemblies consisting of electronic components should be done at astatic-free workstation. Figure l-2 is an example of a static-safe work station using two kinds of ESD ...

Static-Safe Accessories Table 1-2. Static-Safe Accessories HP Number Description 9300-0797 Set includes: 3M static control mat 0.6 m x 1.2 m (2 ft x 4 ft) and 4.6 cm (15 ft) ground wire. (The wrist-strap and wrist-strap cord are not included. They must be ordered separately.) 9300-0980 Wrist-strap c...

S K 1 1 2 6 Item Description 1 9211-5636 2 08590-80013 3 08590-80014 HP Part Number Outer Carton Pads (2) Bottom Tray Figure 1-3. HP 8560A Shipping Container and Cushioning Materials l-1 0 General Information

Sales and Service Offices Hewlett-Packard has sales and service offices around the world providing complete support forHewlett-Packard products. To obtain servicing information, or to order replacement parts, contact the nearest Hewlett-Packard Sales and Service Office listed in Table l-3. In any co...

Table 1-3. Hewlett-Packard Sales and Service Offices US FIELD OPERATIONS EUROPEAN OPERATIONS HEADQUARTERS HEADQUARTERS Hewlett-Packard Company Hewlett-Packard S.A. 19320 Pruneridge Avenue 150, Route du Cupertino, CA 95014, USA 1217 Meyrin (800) 752-0900 Switzerland (41 22) 780.8111 California Hewlet...

Table 1-4. Recommended Test Equipment (continued) Instrument Critical Specifications Recommended Use for Equipment Substitution Model Measuring Compatible w/Power Sensors HP Receiver Relative Mode Resolution: 0.01 Reference Accuracy: Power Sensor Frequency Range: 50 MHz to 6.9 HP Maximum SWR: 1.15 (...

Table 1-4. Recommended Test Equipment (continued) Instrument 20 Fixed Attenuator 10 Fixed Attenuator Signature Multimeter Reference Attenuator Critical Specifications Recommended Use for Equipment Substitution Model Frequency Range: dc to 6.5 HP 8491B Attenuation Accuracy: Option 020 Maximum SWR: 1....

Table 1-4. Recommended Test Equipment (continued) ment Substitution Type N (m) to SMA (f) Length: cm (36 in.) Cable, Coaxial Connectors: BNC (m) HP 10503A required) Length: 122 cm (48 in.) Cable, HP-IB Required w/Performance Test Software HP 10833B (12 required) Required w/HP 85629B Test Adjustment ...

Adjustment Procedures Introduction This chapter contains information on automated and manual adjustment procedures for theHP 8560A spectrum analyzer. Perform the automated procedures using the HP 85629B Tests and Adjustment Module (TAM). N ever perform adjustments as routine maintenance. Adjustments...

Safety Considerations Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensuresafe operation and to prevent damage to the instrument. Service and adjustments should beperfor...

Adjustment Tools For adjustments requiring a nonmetallic tuning tool, use fiber tuning tool, HP part number 8170-0033. For adjustments to the IF Bandpass, use tuning tool, HP part number 8710-1010. Never try to force an adjustment control. This is especially critical when tuning variable capacitors ...

Assembly Changed or Repaired Keyboard No related adjustment R P G No related adjustment A2 Controller Display Adjustment A3 Interface A4 Log Amp/Cal Osc A5 IF A6 Power Supply HV Module A7 LO Distribution Amplifier A8 Low Band Mixer A9 Input Attenuator A10 Tracking Generator A l l Y T O Table 2-1. Re...

Assembly Changed or Repaired Al3 2nd Converter Al4 Frequency Control Al5 RF 2nd IF Sampler Al7 CRT Driver C R T A19 HP-IB A21 OCXO Table 2-1. Related Adjustments (2 of 2) Perform the Following Related Adjustments in the Order Listed Frequency Response Adjustment Display Adjustment (Fast Zero Span) Y...

Table 2-2. Adjustable Components (1 of 3) Reference Designator Adjustment Name DGTL X GAIN S W E E P O F F S E T DGTL Y GAIN V I D E O O F F S E T STOP BLANK START BLANK VIDEO GAIN SWEEP GAIN FM DEMOD LIMITER PHASE LOG AMP TOS LIN FIDELITY BOW OSC AMPTD LC CTR 1 LC CTR 2 LC CTR 3 LC CTR 4 15 DB ATT ...

Table 2-2. Adjustable Components (2 of 3) Reference Adjustment Name Number XTAL CTR 3 3 XTAL CTR 4 3 HV ADJ 1 - 1 0 A D J 9 3 ADJ 9 OSC CTR 2 0 5.01 7 FM SPAN 7 7 A M P T D 8 BIAS 8 MATCH 1 6 VCO RANGE 6 298 MHz ADJ 17 PWR ADJ 6 10 MHz ADJ 1 2 PHASE DET BIAS MHz 4 M P L I T U D E 6 1 8 Description A...

Using the TAM The HP 85629B TAM can be used to perform approximately half of the HP 8560Aadjustment procedures. Table 2-4 lists the TAM adjustments and their corresponding manualadjustments. The TAM adjustments do not include procedures for choosing factory-selected components. Ifan adjustment canno...

Table 2-5. Required Test Equipment for TAM (continued) Adjustment Equipment Used Required Recommended Model Model 6 . L o g F i d e l i t y Synthesizer/Level Generator HP 3335A Test Cable BNC HP 10503A 7. Sampling Oscillator Manual Probe Cable 8 . Y T O Frequency Counter (3 to 6.8 HP HP 5343A 9. LO ...

1. High-Voltage Power Supply Adjustment Assembly Adjusted A6 Power Supply Related Performance Test There is no related performance test for this adjustment. Description The high-voltage power supply is adjusted to the voltage marked on the HV Module. The HV Module is characterized in the factory to ...

1. High-Voltage Power Supply Adjustment Equipment Digital Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A DVM Test Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 34118A Procedure W...

2. Display Adjustment Assembly Adjusted A2 Controller Al7 CRT Driver Related Performance Test Sweep Time Accuracy (Sweep Times ms) Description Coarse adjustment of the deflection amplifiers, Z-axis amplifiers, and line generators is done using the CRT adjust pattern. Fine adjustments use the graticu...

2. Display Adjustment Procedure 1. Set the analyzer’s switch off. Remove the analyzer’s cover and fold out the A2 Controller and A3 Interface assemblies as illustrated in Figure 2-2. Connect the CALOUTPUT to the INPUT. Adjustment locations are shown on the CRT neck for Al7 adjustments and in Figure ...

2. Display Adjustment 14. Adjust the rear-panel Y POSN and Y GAIN until the labels align with their appropriate softkeys. 15. Press If necessary, readjust STOP BLANK and START BLANK for the best-looking intersection of the graticule lines. This will be most noticeable along thecenter vertical and ho...

2. Display Adjustment Intensity Adjustments Press then set the REF LVL to -70 and the LOG dB/DIV to 1. This should almost completely fill the screen with the noise floor. Press Adjust Z GAIN until the intensity at the center of the screen is 15 NIT S , as indicated by the TEK Photometer/Radiometer. ...

2. Display Adjustment D G T L Y G A I N S T A R T B L A N K S T O P B L A N K V I D E O G A I N D G T L Y G A I N S K 1 4 Figure 2-4. A2 Display Adjustment Locations 18. Adjust COURSE FOCUS and DDD for the best focus of the characters at the center of the screen. 19. Adjust Z FOCUS for the best focu...

2. Display Adjustment Fast Zero Span Adjustments 22. Set SWEEP OFFSET, VIDEO OFFSET, VIDEO GAIN and SWEEP GAIN to midrange. Adjustment locations are shown in Figure 2-4 for these A2 adjustments. 23. Set the HP 355D Attenuator to provide 30 attenuation. 24. Press on the analyzer, and connect the equi...

3. IF Adjustment Assembly Adjusted A5 IF Assembly Related Performance Test Resolution Bandwidth Accuracy and Selectivity Description The center frequency of each IF filter pole is adjusted by DAC-controlled varactor diodes and an inductor (for the LC poles) or a transformer (for the crystal poles). ...

3. IF Adjustment Procedure 1. Set the HP 8560A switch off and disconnect the power cord. Remove the analyzer cover and fold down the A2 Controller, A3 Interface, A4 Log Amp, and A5 IF assemblies. Reconnect the power cord and set the (LINE) switch on. Allow the analyzer to warm up for at least 30 min...

3. IF Adjustment Table 2-6. Factory-Selected LC Filter Capacitors 1 CC CTR Adjustment Fixed Factory Select Capacitor LC CTR 1 LC CTR 2 LC CTR 3 LC CTR 4 Table 2-7. LC Factory-Selected Capacitor Selection DVM Reading (V) 0 to 1.5 1.5 to 2.5 2.5 to 3.5 3.5 to 4.5 4.5 to 5.5 5.5 to 6.5 6.5 to 7.5 7.5 t...

3. IF Adjustment Note If the range for the XTAL CTR adjustment is insufficient, replace the appropriate factory-selected capacitor as listed in Table 2-8. To determine the correct replacement value, center the XTAL CTR adjustment, and press ADJ CURR IF STATE. After the IF ADJUST STATUS message the D...

3. IF Adjustment Table 2-10. Capacitor Part Numbers Capacitor Value HP Part Number 6.8 0160-4793 8.2 0160-4792 10 0160-4791 1 2 0160-4790 1 5 0160-4789 18 0160-4788 2 0 0160-5699 2 2 0160-4787 2 4 0160-5903 2 7 0160-4786 2-24 Adjustment Procedures

4. IF Amplitude Adjustments 4. IF Amplitude Adjustments The IF Amplitude Adjustments consist of the Cal Oscillator Amplitude adjustment and the Reference 15 Attenuator adjustment. Assembly Adjusted A4 Log Amp/Cal OscillatorA5 IF Assembly Related Performance Tests IF Gain Uncertainty Test Scale Fidel...

4. IF Amplitude Adjustments A5 IF A 4 L O G A M P R 4 4 5 J 4 ’ ( R E V I S I O N C O N N E C T O R ) J 7 R 8 2 6 J 5 J 4 R 5 4 4 J 3 R 5 3 1 ' Figure 2-7. IF Amplitude Adjustment Locations A4 Log Amp/Cal Oscillator Amplitude Adjustment This adjustment sets the output amplitude of the A4 Log Amp/Cal...

4. IF Amplitude Adjustments Procedure 1. Set the HP 8560A switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location. 2. Disconnect W29, violet coax cable, from Connect the test cable between and the 50...

4. IF Amplitude Adjustments A5 Reference Attenuator Adjustment 12. Set the HP 3335A (AMPLITUDE) to -60 13. Connect a BNC cable between the 50 output of the HP 3335A and the HP 8560A INPUT 14. On the HP press (CAL) and REF LEVEL ADJUST. Use the front-panel knob or step keys to place the peak of the d...

5. DC Log Amplifier Adjustments 5. DC Log Amplifier Adjustments There are three DC Log adjustments; Limiter Phase, Linear Fidelity, and Log Fidelity. These adjustment need only be done under the following conditions: Limiter Phase Only if a repair is made to blocks F, G, H, I, or J. Linear Fidelity ...

5. DC Log Amplifier Adjustments Procedure 1. Set the HP 8560A switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location. 2. Connect the HP 3335 50 output to the HP 8560A 50 input. Set the HP 8560A (LIN...

5. DC Log Amplifier Adjustments 7. Reduce the input power by 40 to -58 ( use an attenuator or a source with a good relative amplitude accuracy). 8. If the signal is lower on the screen than expected (delta marker reads a change of greater than 40 such as then adjust ( see Figure 2-7) for an even low...

5. DC Log Amplifier Adjustments A4 LOG Fidelity Adjustment This adjustment consists of adjusting until the error is adjusted to zero. Procedure 1. Set the HP 8560A (LINE) switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure ...

6. Sampling Oscillator Adjustment 6. Sampling Oscillator Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description The phase detector bias is adjusted for 1.8 Vdc. The sampling oscillator tank circuit is adju...

6. Sampling Oscillator Adjustment Procedure 1. Set the HP 8560A switch to off and disconnect the line power cord. Remove the analyzer cover and fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the Al4 Frequency Control assembly. Reconnect the line power cord and set the (LINE) swit...

7. YTO Adjustment 7. YTO Adjustment Assembly Adjusted Al4 Frequency Control Assembly Related Performance Tests Frequency Span Accuracy Frequency Readout Accuracy and Frequency Count Marker Accuracy Description The YTO main coil adjustments are made with the phase-lock loops disabled. The YTOendpoint...

7. YTO Adjustment Procedure Note This adjustment cannot be performed if the analyzer preselected external mixer mode is selected. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. YTO Main Coil Adjustments Set the HP 8560A switch off. Remove the analyzer cover and fold down the Al5 RF and Al4 Frequency Control...

8. First LO Distribution Amplifier Adjustment Assembly Adjusted Al4 Frequency Control Assembly Related Performance Test First LO OUTPUT Amplitude Description The gate bias for the A7 LO Distribution Amplifier is adjusted to the value specified on A7.LO AMPTD is adjusted so that the LO SENSE voltage ...

9. Tracking Generator Power Level Adjustments Assembly Adjusted A10 Tracking Generator Assembly Related Performance Test Absolute Amplitude and Vernier Accuracy Description The A10 Tracking Generator has two adjustments for setting the output power. -10 ADJ sets the power level when the TRK GEN RF P...

9. Tracking Generator Power Level Adjustments 2. Connect the Type N cable between the RF OUT and RF INPUT connectors on the HP 8560A. 3. Press (PRESET) on the HP 8560A and set the controls as follows: 4. CENTER FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

9. Tracking Generator Power Level Adjustments 10. Set the TRK GEN RF POWER to -10 Note the power displayed on the measuring receiver. Power at -10 Setting 11. Proceed with steps 12 through 14 only if the power level noted in the previous step was outside the range of -10 +/-.23 12. With the TRK GEN ...

10. Frequency Response Adjustment 10. Frequency Response Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Tests Displayed Average Noise LevelFrequency Response Description A signal of the same known amplitude is applied to the spectrum analyzer at several different frequencies. At ea...

10. Frequency Response Adjustment Equipment Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP Measuring Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8902APower Sensor . . . . . . . ....

10. Frequency Response Adjustment 13. Place the WR PROT/WR jumper on the A2 Controller assembly in the WR PROT position. Adjustment Procedures 2-47

11. Calibrator Amplitude Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test Calibrator Amplitude and Frequency Accuracy Description The CAL OUTPUT amplitude is adjusted for panel CAL OUTPUT connector. MEASUR I NG R E C E I V E R 10.00 measured directly at the front S P E C T R U M...

11. Calibrator Amplitude Adjustment 3. Connect the HP 8482A through an adapter directly to the HP 8560A CAL OUTPUT connector. 4. Adjust CAL AMPTD for a -10.00 reading on the HP 8902A display. Adjustment Procedures 2-49

12. 10 MHz Reference Adjustment (Non-Option 003 only) Assembly Adjusted Al5 RF Assembly Related Performance Test 10 MHz Reference Output Accuracy Description The frequency counter is connected to the CAL OUTPUT, which is locked to the 10 MHzreference. This yields better effective resolution. The tem...

12. 10 MHz Reference Adjustment (Non-Option 003 only) 3. Press REAR PANEL , and ensure that the 10 MHz reference is set to 10 MHz INT. Note When the 10 MHz reference is set to MHz EXT , the TCXO is not operating and warmed up. If the reference is set to MHz EXT , set the reference to 10 MHz INT and ...

13. Demodulator Adjustment Assembly Adjusted A4 Log Amplifier Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description A 5 peak-deviation FM signal is applied to the INPUT The detected audio is monitored by an oscilloscope. FM DEMOD is adjuste...

13. Demodulator Adjustment Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A Oscilloscope Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10084A Procedure 1. Set the HP 8560A switch off. Place the ana...

13. Demodulator Adjustment Note It is possible to do this procedure without an oscilloscope by adjusting FM DEMOD for the loudest audio tone from the internal speaker. This adjustment method may give broader and less accurate results than whenusing the oscilloscope to peak the response. 11. Set 8560...

14. External Mixer Bias Adjustment 14. External Mixer Bias Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description A voltmeter is connected to the HP 8560A IF INPUT with the external mixer bias set to off. ...

14. External Mixer Bias Adjustment 3. On the HP 8560A press EXTERNAL MIXER BIAS, then BIAS OFF. 4. Adjust EXT BIAS ZERO for a DVM reading of 0.000 Vdc 2-56 Adjustment Procedures

15. External Mixer Amplitude Adjustment 15. External Mixer Amplitude Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test IF Input Amplitude Accuracy Description The slope of the flatness compensation amplifiers is determined. The user-loaded conversion losses for K-band are recorde...

15. External Mixer Amplitude Adjustment Adapters Type N (f) to SMA (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Type APC 3.5 (f) to APC 3.5 (f) . ....

16. Second IF Gain Adjustment A s s e m b l y A d j u s t e d Al5 RF Assembly Related Performance Test IF Input Amplitude Accuracy Description The gain of the Second IF (between INT Second IF and the third mixer) is set to 12 Note This adjustment is necessary after replacing either Second IF Amplifi...

16. Second IF Gain Adjustment ( B E N E A T H I E L D ) Figure 2-19. Location of Adjustment Procedures 2-61

17. Signal ID Oscillator Adjustment 17. Signal ID Oscillator Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description The frequency range of the 298 MHz Signal ID Oscillator is determined by counting the 10....

17. Signal ID Oscillator Adjustment Cables BNC, 122 cm (48 in) (2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A Test Cable, BNC (m) to SMB (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Procedure 1. 2. 3. 4. 5. 6. 7. Set the HP 8560A switch off, d...

17. Signal ID Oscillator Adjustment 9. While observing the HP display, adjust SIG ID for the highest obtainable frequency with less than 3 decrease in amplitude from maximum. Read this frequency from the frequency counter and record as HIGH = H z 10. Observe the HP display as you adjust SIG ID for t...

18. 600 MHz Amplitude Adjustment Assembly Adjusted Al5 RF Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description The HP 8566 Spectrum Analyzer is used to monitor the CAL OUTPUT signal of the HP 8560A. Potentiometer R726 is then adjusted to m...

18. 600 MHz Amplitude Adjustment 4. Press on the HP 8566 and set the controls as follows: START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MHz S T O P F R E Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

19. 10 MHz Reference Adjustment (Option 003) Assembly Adjusted A21 OCXO Assembly Note Replacement oscillators are factory adjusted after a complete warmup andafter the specified aging rate has been achieved. Thus, readjustment should typically not be necessary after oscillator replacement and is gen...

19. 10 MHz Reference Adjustment (Option 003) S P E C T R U M A N A L Y Z E R E L E C T R O N I C B O T T O M - S I D E V I E W O F M A I N D E C K FREQUENCY STANDARD . Figure 2-22. 10 MHz Reference Adjustment (Option and Adjustment Location 1. Connect equipment as shown in Figure 2-22 as follows: a....

19. 10 MHz Reference Adjustment (Option 003) 2. Set the frequency counter controls as follows: 3. 4. FUNCTION/DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FREQ A INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

20. Tracking Oscillator Adjustment (Option 002) 20. Tracking Oscillator Adjustment (Option 002) Note This is not a routine adjustment. This adjustment should only be performed ifthe Tracking Adjustment Range performance test has failed. Assembly Adjusted A10 Tracking Generator Assembly Related Perfo...

20. Tracking Oscillator Adjustment (Option 002) Procedure 1. 2. Remove the A10 Tracking Generator Assembly as described in Chapter 3. With the A10 Tracking Generator positioned next to the the HP reconnect W14 (lo-wire ribbon cable) to Reconnect W48 to Connect the 50 termination to Connect the equip...

This chapter describes the removal and replacement of all major assemblies. The following replacement procedures are provided: Page Access to 2 Cable Color 2 Procedure 1. Analyzer 3 Procedure 2. Al Front Frame/Al8 CRT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Access to Internal Assemblies Servicing the HP 8560A requires the removal of the spectrum analyzer’s cover assembly and the folding down of six board assemblies. Four of these assemblies lay flat along the top of theanalyzer and two lay flat along the bottom of the analyzer. All six assemblies are a...

Procedure 1. Analyzer Cover Procedure 1. Analyzer Cover Removal/Replacement 1. Disconnect the line-power cord, and place the analyzer on its front panel. 2. Loosen (but do not remove) the four rear-bumper screws, using a 4 mm hex wrench. Pull the cover assembly off towards the rear of the instrument...

Procedure 2. Al Front Frame/Al8 CRT 4 P L A C E S w 4 7 ( O P T 0 0 2 ) ( O P T 0 0 2 ) 1 \ I ( S T A N D A R D ) Figure 3-3. and Line-Switch Assembly Mounting Screws 16. Remove screw (2) securing the A9 Input Attenuator Assembly to the center support on the front frame. See Figure 3-3. 17. Use a op...

Procedure 2. Al Front Frame/Al8 CRT 22. Use a nut driver to remove the dress nut holding the front-panel CAL OUTPUT connector to the front panel. If necessary, drill out the nut driver to fit over the BNCconnectors and cover the tip with heatshrink tubing or tape to avoid scratching the enameled fro...

Procedure 2. Al Front Frame/Al8 CRT Figure 3-5. Installing the CRT and Front-Frame Assemblies Replacement Note Use care when handling the glass CRT EM1 shield. The glass may be cleaned using thin-film cleaner (HP part number 8500-2163) and a lint-free cloth. When installing the glass shield, face th...

Procedure 2. Al Front Frame/Al8 CRT Figure 3-6. Placing the CRT into the Front Frame 5. Connect to 6. Snap CRT cable onto the end of the CRT assembly. 7. Fully seat the front frame and CRT assemblies into the analyzer. 8. Secure the front frame to the analyzer’s side frames, using three screws per s...

Procedure 2. Al Front Frame/Al8 CRT 15. Connect W36, coax 86, to the front-panel IF INPUT connector. 16. Use a wrench to connect W41 from the A9 Input Attenuator to the front-panel INPUT connector. Make sure that W36, and are routed between and the attenuator bracket. Secure the A9 Input Attenuator ...

Procedure 3. Keyboard/Front Panel Keys Procedure 3. Keyboard/Front Panel Keys Removal 1. Remove the front frame from the analyzer as described in Procedure 2, “Al Front Frame/A18 CRT.” 2. Place the front frame face-down on the bench and remove the front-frame center support. 3. Disconnect from and t...

Procedure 4. RPG Removal 1. Remove the A9 Input Attenuator as described in Procedure 8, “A7 through Al3 Assemblies.” 2. Disconnect the RPG cable from the Keyboard assembly. 3. Remove the front-panel RPG knob using a number 6 hex (Allen) wrench. Use a nut driver to remove the nut holding the RPG shaf...

Procedure 5. A2, A3, and AS Assemblies Procedure 5. A2, A3, A4, and A5 Assemblies Removal 1. Remove the analyzer’s cover. 2. Place the analyzer on its right side frame. 3. Remove the eight screws holding the A2, A3, A4, and A5 assemblies to the top of the analyzer. These screws are labeled and (4) i...

Procedure 5. A2, A3, A4, and A5 Assemblies Figure 3-7. A2, A3, A4, and A5 Assembly Removal Replacement 1. Place the analyzer top-side-up on the work bench. 2. Attach the assembly being installed to the two chassis hinges with two screws. 3. Leave the assembly in the folded-out position and attach ri...

Procedure 5. A2, A3, A4, and A5 Assemblies W H I T E C O M P O N E N T S I D E C O M P O N E N T B L A C K W 5 4 R E D w 5 3 B R O W N W H I T E W I - A 2 W 2 7 O R A N G E A 4 B L U E W 2 4 G R E E N w 5 4 R E D B L U E w 5 3 B R O W N w 5 1 G R A Y / Y E L L O W Figure 3-8. Assembly Cables (1 of 2...

Procedure 5. A2, A3, A4, and A5 Assemblies W 5 2 WH I TE V I O L E T W 2 7 O R A N G E Figure 3-8. Assembly Cables (2 of 2) 3-18 Assembly Replacement

Procedure 5. A2, A3, A4, and A5 Assemblies W 2 7 W 2 3 w 2 2 C O A X 7 C O A X 9 C O A X 3 C O A X 9 3 C O A X 4 C O A X 0 W 6 Figure 3-9. Coaxial Cable Clip 7. Check to ensure that no cables will become pinched under the hinges when folding up the A4 and A5 assemblies. 8. Fold the A4 and A5 assembl...

Procedure 6. A6 Power Supply Assembly Procedure 6. A6 Power Supply Assembly Removal Warning The A6 Power Supply and High Voltage assemblies contain lethal voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the power cord from the instrumen...

Procedure 6. A6 Power Supply Assembly 16. Use a screwdriver to remove three standoffs from the A6 Power Supply assembly. 17. Remove the A6 Power Supply assembly by lifting from the regulator toward front of analyzer. Replacement 1. Attach the A6 Power Supply assembly to the analyzer’s chassis using ...

Procedure 7. High Voltage Assembly Removal Warning The A6 Power Supply and High Voltage assemblies contain lethal voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the power cord from the instrument before beginning this replacement proce...

Procedure 7. High Voltage Assembly 16. Disconnect ribbon cable from See Figure 3-11. 17. Remove the two screws (1) securing two board-mounting posts to the left side frame and remove the posts. See Figure 3-13. 18. Remove the two left side-frame screws (2) securing the Al7 assembly. 19. Lift up the ...

Procedure 8. A7 through Al3 Assemblies Procedure 8. A7 through Al3 Assemblies A separate replacement procedure is supplied for each assembly listed below. Before beginning a procedure, do the following: Fold out the Al4 and Al5 assemblies as described in Procedure 9, “Al4 and Al5 Assemblies.” n If t...

Procedure 8. A7 through Al3 Assemblies w 4 4 w 3 9 W 3 A 7 W 3 8 F L 1 W 5 6 w 4 5 w 4 7 0 0 2 ) F L 2 w 3 3 W 4 6 0 0 2 ) w 4 3 0 0 2 ) w 5 7 A l 3 w 3 5 W I 0 A 1 0 ( O P T I O N 0 0 2 ) Figure 3-14. Assembly Locations A l w 4 2 ( S T A N D A R D ) l A8 , w 3 4 - - - - - - - w 4 1 A 9 w 1 4 0 0 2 ...

Procedure 8. A7 through Al3 Assemblies G A T E B I A W H I T E / V I O L E T ( 9 7 ) G N D B L A C K Figure 3-15. RF Section Bias Connections Assembly Replacement 3-27

A7 1st LO Distribution Amplifier Removal 1. Remove the two screws securing the assembly to the analyzer’s center deck. 2. Use a wrench to disconnect W38 and W39 at and J2. 3. Disconnect W42 (W43 on Option 002) at the front-panel LO OUTPUT connector. Loosen W42 (W43 on Option 002) at 4. Remove the ga...

A8 Low Band Mixer A8 Low Band Mixer Removal 1. Disconnect W34 at and place the analyzer upside-down on the work bench with Al4 and Al5 folded out to the left. 2. Remove W45 from FL1 and 3. Use a wrench to loosen the semirigid coax cable connections at and 4. Remove the two screws securing A8 to the ...

A9 Input Attenuator Removal 1. Disconnect W34 at and place the analyzer upside-down on the work bench. 2. Remove W41 and disconnect W44 from the attenuator. 3. Remove screw (1) securing the attenuator to the front-frame center support. See Figure 15. 4. Remove screw (1) securing the A9 Input Attenua...

A10 Tracking Generator (Option 002) A10 Tracking Generator (Option 002) Removal 1. Use a inch wrench to remove the Tracking Generator’s RF OUT, LO OUT, and LO IN semi-rigid cables. 2. Disconnect W14 and W16 from the Tracking Generator. 3. Remove the three screws (1) securing the Tracking Generator t...

All YTO Removal 1. If the analyzer is an Option 002, remove the Tracking Generator before proceeding. 2. Place the analyzer top-side-down on the work bench. 3. Use a inch wrench to remove (as a unit). 4. Disconnect W38 at the All Assembly. 5. Remove the All mounting screws (1) shown in Figure 3-18. ...

Al3 Second Converter Al3 Second Converter Caution Turn off the analyzer’s power when replacing the Al3 Second Converter Assembly. Failure to turn off the power may result in damage to the assembly. Removal 1. Disconnect W34 at and place the analyzer upside-down on the work bench. 2. Disconnect ribbo...

Procedure 9. Al4 and Al5 Assemblies R e m o v a l 1. Remove the analyzer’s cover as described in Procedure 1, “Analyzer Cover.” 2. Place the analyzer on its right side frame. 3. Remove the eight screws and washers holding the Al4 and Al5 assemblies to the bottom of the analyzer. These screws are lab...

Procedure 9. Al4 and Al5 Assemblies Caution DO NOT fold the board assemblies out of the analyzer one at a time. Always fold the Al4 and Al5 assemblies as a unit. Folding out one assembly at a time binds the hinges attaching the assemblies and may damage an assembly andhinge. 4. The board assemblies ...

Procedure 9. Al4 and A15 Assemblies W 3 2 w 2 w 4 9 0 0 3 ) 0 0 3 ) W 3 7 w 5 1 0 0 2 ) I \ w 3 7 WI 1 0 0 2 ) W I W I 9 0 0 1 ) w 3 5 W 3 6 I N O P T I O N 0 0 2 ) A 3 4 A l 5 Figure 3-20. Al4 and Al5 Assembly Cables 3-36 Assembly Replacement

Procedure 10. Al7 CRT Driver Procedure 10. Al7 CRT Driver Removal 1. Remove the analyzer’s cover assembly and fold out the A2, A3, A4, and A5 assemblies as described in Procedure 5, A3, A4, and A5 Assemblies Removal,” steps 3 through 6. 2. Place the analyzer top-side-up on the work bench with A2, A3...

Procedure 11. Fan Removal/Replacement Warning Always disconnect the power cord from the instrument before beginning this replacement procedure. Failure to follow this precaution can present a shock hazard which may result in personal injury. 1. Remove the four screws securing the fan assembly to the...

Procedure 12. Battery Procedure 12. Battery Warning Battery contains lithium polycarbon monofluoride. Do not incinerate or puncture this battery. Dispose of discharged battery in a safe manner. Caution To avoid loss of the calibration constants stored on the A2 Controllerassembly, connect the analyz...

Procedure 13. Rear Frame/Rear Dress Panel Removal Warning The A8 Power Supply and High Voltage assemblies contain lethal voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the power cord from the instrument before beginning this replacemen...

Procedure 13. Rear Frame/Rear Dress Panel 15. Remove the two screws securing the rear-panel battery assembly, and remove the assembly. Remove the battery and unsolder the two wires attached to the battery assembly. 16. Use a nut driver to remove the dress nuts holding the BNC connectors to the rear ...

Procedure 14. W3 Line Switch Cable Removal Warning Due to possible contact with high voltages, disconnect the analyzer’s line-power cord before performing this procedure. 1. Remove the analyzer’s cover assembly as described in Procedure 1, “Analyzer Cover.” 2. Fold out the A2, A3, A4, and A5 assembl...

Procedure 14. W3 Line Switch Cable 18. Fold out the Al4 and Al5 assemblies as described in Procedure 9, “Al4 and Al5 Assemblies Removal,” steps 3 and 4. 19. Remove the screw (1) securing W3, the line switch assembly, to the front frame. The screw is captive. See Figure 3-25. 0 0 0 0 0 0 0 Figure 3-2...

Procedure 14. W3 Line Switch Cable 21. From the top side of the analyzer, use contact removal tool, HP part number 8710-1791, to remove the four wires from the W3 connector. See Figure 3-26. With wire cutters, clip the tie wrap holding the cable to the contact housing. 22. Completely remove the cabl...

Procedure 14. W3 Line Switch Cable Replacement (Using Contact Removal Tool, HP part number 8710-1791) 1. Ensure that the action of the switch is working properly. With a pair of wire cutters, clip the tie wrap holding the cable to the contact housing of the replacement W3 assembly. 2. Using the cont...

Procedure 15. EEROM Removal/Replacement Caution The EEROM is replaced with the power on. Use a nonmetallic tool to removethe defective EEROM and install the new EEROM. 2 . 3 . 4. 5 . 6. 7 . 8. 9. Turn the HP 8560A (LINE) switch off. Remove the analyzer’s cover assembly and fold out the A2, A3, A4, a...

Procedure 16. A21 OCXO (Option 003) Procedure 16. A21 OCXO (Option 003) Removal 1. Remove the rear-frame assembly as described in Procedure 13, “Rear Frame/Rear Dress Panel Removal,” steps 1 through 22. 2. Place the analyzer on its right-side frame. 3. Fold out the Al4 and Al5 assemblies as describe...

This chapter contains information on ordering all replaceable parts and assemblies. Locate the instrument parts in the following figures and tables: Page Table 4-l. Firmware-Dependent Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Table 4-4. Replaceable Part...

Direct Phone-Order System Within the USA, a phone order system is available for regular and hotline replacement partsservice. A toll-free phone number is available, and Mastercard and Visa are accepted. Regular Orders: The toll-free phone number, (800) 227-8164, is available 6 am to 5 pm, Pacific st...

Table 4-2. Reference Designations, Abbreviations and Multipliers (1 of 4) A AT B B T C C R DC DL D S E REFERENCE DESIGNATIONS Assembly F Fuse R T Attenuator, Isolator, F L Filter S Limiter, Termination HY Circulator T Fan, Motor J Electrical Connector TB B a t t e r y (Stationary Portion), TC C a p ...

Table 4-2. Reference Designations, Abbreviations, and Multipliers (2 of 4) DAP-GL Diallyl Phthalate Glass DBL Double D C D R Decoder D E G Degree D - H O L E D - S h a p e d H o l e DIA Diameter D I P Dual In-Line Package DIP-SLDR Dip Solder D-MODE DO D P D P D T D W L E - R E X T F FC Depletion Mod...

Table 4-2. Reference Designations, Abbreviations, and Multipliers (3 of 4) r N N Nano, None N - CH AN N -C h a n n e l NH Nanohenry NM Nanometer, Nonmetallic N O Normally Open, N u m b e r NOM Nominal N P N Negative Positive Negative (Transistor: Nanosecond, Non-Shorting, Nose Numeric Nylon (Polyami...

Table 4-2. Reference Designations, Abbreviations, and Multipliers (4 of 4) ABBREVIATIONS U VAR Variable Y V D C V o l t s - D i r e c t C u r r e n t UCD Microcandela Y I G UF Microfarad Garnet U H Microhenry W Microliter, Underwriters’ W Watt, Wattage, Laboratories, Inc. White, Wide, Width U N H D ...

Table 4-3. Manufacturers Code List (1 of 3) Manufacturer Name Address Code CO633 RIFA AB STOCKHOLM S W Cl433 AB ELEKTRONICK GMBH SALZBURG A U D8350 GROSS A S T U T T G A R T GM D 8 3 5 1 M A R Q U A R D T G M B H RIETHEIM GM D 8 4 3 9 R O E D E R S T E I N / R E S I S T A G M B H G M K 7 2 5 3 S T C...

Table 4-3. Manufacturers Code List (2 of 3) Code 15542 1 5 8 0 1 15818 16179 16299 16428 17856 18324 18612 18873 19701 24022 2 4 2 2 6 2 4 3 5 5 25403 27014 2 8 4 8 0 29005 30043 10161 12159 32293 32997 33096 33399 34335 34371 34649 34899 5 0 1 5 7 52763 55719 Manufacturer Name MINI-CIRCUITS LAB FEN...

Table 4-3. Manufacturers Code List (3 of 3) Mfr. Code 6E259 70276 71744 71984 72228 73138 76381 78553 83701 84411 91506 91637 92194 92895 96900 98978 98291 99800 01561 10183 11591 16179 16428 24022 2 4 9 3 1 Manufacturer Name AMETEK INCALLEN MFG COGENERAL INSTRUMENT CORPDOW CORNING CORPCONTINENTAL S...

Reference HP Number 1810-0118 1 1 1250-0780 5 1 H P 9 1 8120-2682 2 1 8710-1755 9 3 5062-0800 5 1 5001-8739 7 5001-8740 0 5001-8742 2 5021-5807 6 5021-5808 7 5021-5836 1 2 3515-0886 3 3515-0887 4 3515-1241 6 5 2 1515-1114 2 3710-1755 3 5958-6573 0 2 2 2 2 2 5 10 1 6 8 1 2 8 2 2 2 6 5062-1900 8 5001-...

Table 4-4. Replaceable Parts (continued) Reference HP Designation Number 0515-0889 0515-1241 6 0515-1331 5 5061-9501 9 5061-9685 0 0515-1106 2 8710-1755 9 5958-6573 0 1494-0060 0515-0949 0515-1013 0515-0909 A l 38560-60052 38560-60053 D Description Part Code Number SCREW-MACH M3.5 x 0.6 28480 0515-0...

Table 4-4. Replaceable Parts (continued) Reference HP Part Description Part Designation N u m b e r D Code Number See Tbl A-l 1 B D A Y - K E Y B O A R D 28480 See Tbl A-l 0960-0745 6 1 RPG ASSEMBLY (Includes Cable) 28480 0960-0745 A2 See Tbl A-l 1 C O N T R O L L E R A S S E M B L Y * 28480 See Tbl...

Reference Designation A l 3 A l 4 HP Number 5086-7812 See Tbl A-l A l 5 (Opt. 001) (Opt. 002) (Opt. 003) (Opt. 012) (Opt. 013) (Opt. 023) (Opt. 123) A l 6 A l 7 A18 See Tbl A-l See Tbl A-l See Tbl A-l See Tbl A-l See Tbl A-l See Tbl A-l See Tbl A-l See Tbl A-l 5086-7751 5086-7750 See Tbl A-l See Tbl...

Table 4-4. Replaceable Parts (continued) 3 21 lo-0756 0 FL1 0955-0420 3 FL2 0135-0307 6 1 1 9 7 8 9 2 9 1 1 1 1 1 1 1 1 1 1 2 10 1 2 1 2 Description FAN ASSEMBLY (Includes Wire) BATTERY 3.0 V 1.2 A-HR LITHIUM POLYCARBON MONOFLORIDE; B U T T O N T E R M I N A T I O N S THIONYL FUSE 5A 250V NTD FE IEC...

Table 4-4. Replaceable Parts (continued) Reference Designation A4 Assembly A5 Assembly 114 Assembly Assembly HP Part Number 5021-9914 0515-1486 0905-0375 5021-672s 5021-6730 5021-6731 5021-6732 0515-2081 0905-0375 2190-0583 5021-6733 5021-6734 3515-0951 2190-0583 5021-6737 1515-2081 a 1 89 2 3 6 7 8...

Table 4-4. Replaceable Parts (continued) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Description CABLE ASSEMBLIES POWER CABLE, RIBBON CONTROL CABLE, RIBBON CABLE ASSEMBLY LINE SWITCH CABLE ASSEMBLY, RIBBON, OPTION MODULE to Rear Panel J3) CABLE ASSEMBLY, HEADPHONE CABLE ASSEMBLY, BATTERY to Rear Panel Battery Holde...

Table 4-4. Replaceable Parts (continued) Description 8 1 3 3 5 3 7 1 1 1 1 1 1 1 1 1 1 1 1 CABLE ASSEMBLY, A10 ALC EXT (Rear Panel to CABLE ASSEMBLY, COAX 97, LO SWEEP 0.5 to Rear Panel CABLE ASSEMBLY, COAX 83, 2ND IF OUT to Rear Panel CABLE ASSEMBLY, COAX 6,0 SPAN VIDEO to CABLE ASSEMBLY, COAX 0, 1...

Table 4-4. Replaceable Parts (continued) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Description CABLE ASSEMBLY, COAX 92, INT 2ND IF to CABLE ASSEMBLY, COAX 86, EXT 2ND IF (Front Panel to CABLE ASSEMBLY, COAX 85,lO MHz REF 1 to CABLE ASSEMBLY, SEMI-RIGID, LO IN ( A l l J 2 t o CABLE ASSEMBLY, SEMI-RIGID, MIXER OU...

Table 4-4. Replaceable Parts (continued) Reference Designation w 5 1 W52 w 5 3 w 5 4 W56 w 5 7 HP Number 5062-6478 5062-6477 5062-6476 5062-6475 5062-6471 5022-0049 5022-0050 D 5 1 4 1 3 1 3 1 8 1 0 1 3 1 Description CABLE ASSEMBLY, COAX 84, 10 MHz REF2 to CABLE ASSEMBLY, COAX 9, 10.7 MHz CAL SIG to...

B O T T O M V I E W Description SCREW-MACH M3 x 0.5 PAN-HD SCREW-MACH M3 x 0.5 PAN-HD SCREW-MACH M3 x 0.5 PAN-HD WASHER-FL MTLC NO. 4 SCREW-MACH M3 x 0.5 PAN-HD Figure 4-1. Parts Identification, Assembly Mounting Code 28480 28480 28480 28480 28480 Replaceable Parts 4-2 1

Parts List, Cover Assembly (See Figure 4-2) Item 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 15 1 6 1 7 18 19 2 0 HP Number 5041-8911 5041-8912 0515-1114 1460-2164 5021-6343 5021-6344 5021-8667 5001-8728 0515-1367 0515-1133 5001-8800 5041-7238 5041-3989 5041-8913 0515-1114 5041-8907 0900-0024 2190-0587 05...

Parts List, Main Chassis (See Figure 4-3) SCREW-MACH M3 X 0.5 PAN-HD SEM SMM 3.0 35 PCPDSSCREW-MACH M3 X 0.5 PAN-HD SEM WASHER-FL MTLC NO.4 COVER, A6 POWER SUPPLY (Includes label)SCREW-MACH M3 X 0.5 BOARD MOUNT SCREW-MACH M3 X 0.5 PAN-HD SEM COVER, Al7CRT MOUNT 333 1 3 1 4 1 223 4 1 1 4 2 1 4222522 ...

Parts List, RF Section (See Figure 4-4) 22 1 2 1 2 1 23 4 1 2 1 1 2 1 43 Description SCREW-MACH M3 X 0.5 GMM-LG PAN-HDSCREW-MACH M3 X 0.5 GMM-LG PAN-HDSCREW-MACH M3 X 0.5 GMM-LG PAN-HDFILTER CLAMPNOT ASSIGNED SCREW-MACH M3 X 0.5 GMM-LG PAN-HD MAIN DECK SCREW-MACH M3 X 0.5 SODEG-FLH-HD FRONTENDDECKSC...

[ten 1 23 4 9 1011 1213 14 15 16 171819 20 2122 23 24 25 26 272829 30 31 3233343536 HP Part Number 0515-1622 5041-8906 1000-0897 0370-3069 3030-00222950-0043 2190-0016 5060-04670590-1251 1250-1666 0515-2145 5062-4806 0905-10185021-54830515-03665021-8689 8160-05200535-00822190-0016 2950-0043 1250-219...

Major Assembly and Cable Locations Introduction This chapter identifies the module’s assemblies and cables and contains the following figures: Page Figure 5-l. Hinged Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 Figure 5-2. Top View (A2 Unfolde...

Assemblies A19 HP-IB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5-4 A20 Battery Assy . . . . . . . . . . ....

Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Figure W34 First LO Samp. (Coax 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5, 5-6, 5-7 W35 Int Second IF (Coax 92) . . . . . . . . . . . . . ...

General Troubleshooting Introduction This chapter provides information needed to troubleshoot the instrument to one of the sixmajor functional sections. Chapters 7 through 12 cover troubleshooting for each of thesesections. Before troubleshooting, read the rest of this introduction. To begin trouble...

Assembly Test Points The analyzer’s board assemblies contain four types of test points: post, pad, extendedcomponent lead, and test jack. Figure 6-l illustrates each type of test point as seen on bothblock diagrams and circuit boards. The name of the test point will be etched into the circuit board ...

T E S T P O I N T S O N B L O C K D I A G R A M J 4 ( T E S T T P 2 J A C K ) T E S T P O I N T S O N C I R C U I T B O A R D A S S E M B L Y ( P O S T ) , Figure 8-1. Assembly Test Points T E S T J A C K P I N N A M E T E S T J A C K P I N N U M B E R S K 1 6 3 General Troubleshooting 6-3

D G N D G N D A G N D D G N D W I P O W E R C A B L E C O N N E C T I O N S - 1 5 v P W R U P A G N D - 1 5 v- 1 5 v A G N D * S C A N R A M P N C A G N D . 46 45 l 44 43 . 40 39 l 38 37 . 36 35 l 34 33 3 1 . 30 29 l 28 27 . 26 25 l 24 23 . 2 1 . 1 9 . 17 l l A GND l GNC . . . . . . A GND NC A G N D...

. 1 5 I 1 6 . L O P T 1 7 1 8 . O A 1 3 I N T E R F A C E C A B L E C O N N E C T I O N S C A B L E C O N N E C T I O N S R E A R P A N E L J 3 O D 6 . 9 . O D 5 G N D . 8 7 . O D 4 . . 6 D G N D l 4 G N D . 2 1 l O D O GND . 11 I . L K E Y R P G I R G GND 13 1 4 . R E F GND 1 6 N C R E A R P A N E ...

WR Menus The jumper on jack is shipped from the factory in the WR PROT (write protect) position (jumper on pins 2 and 3). W hen the jumper is set to the WR (write enable) position (jumper on pins 1 and an alternate menu is displayed under (CAL). Figure 6-3 illustrates those areas of the (CAL) menu t...

Troubleshooting to a Functional Section 1. Refer to Table 6-l for the location of troubleshooting information. 2. If the HP 85629B Test and Adjustment Module (TAM) is available, refer to “Using the TAM” in this chapter. 3. If error messages are displayed, refer to “Error Messages” in this chapter. Y...

Table 6-1. Location of Assembly Troubleshooting Instrument Assembly Keyboard RPG A2 Controller A3 Interface A4 Log Amplifier/Cal Oscillator A5 IF A6 Power Supply HV Module A7 LO Dist. Ampl. A8 Low Band Mixer A9 Input Attenuator A10 Tracking Generator All YTO 413 2nd Converter 414 Frequency Control A...

Using the TAM When attached to the spectrum analyzer’s rear panel, the HP 85629B Test and Adjustment Module (TAM) p rovides diagnostic functions for supporting the HP 8560A. Because the TAM is connected directly to the analyzer’s internal data and address bus, it controls the analyzer’s hardware dir...

Note The HP 85629B Test and Adjustment Modules with firmware revision A or B will not properly execute Automatic Fault Isolation on the HP 8560A Spectrum Analyzer. Note HP 8560A Spectrum Analyzers with serial prefix 3207A and above have the TAM firmware residing in the spectrum analyzer. The TAM wil...

Inconsistent Results Many of the signals measured by the TAM are digitally controlled. If inconsistent results are obtained, or if failures appear in unrelated areas, the digital control may be at fault. Refer tothe manual troubleshooting procedures for those assemblies to isolate those failures. Er...

Check The keyboard interface and strobe-select circuitry must be functioning correctly, since these are required to operate the TAM. The TAM checks the ADC by attempting to measure threesignals from three different locations. This ensures that an open or short in one cable will nothide the fact that...

printer is connected, press Print Page to provide a hard copy of the currently displayedscreen (the labels will not be printed). Each test connector has fifteen pins (one pin is missing to act as a key). The pins contain eight measured signal lines (measured signal lines denoted as MS1 through one i...

Error Messages The spectrum analyzer displays error messages in the lower right-hand corner of the display. A number, or error code, is associated with each error message. These error messages alert theuser to errors in spectrum analyzer function or use. Multiple error messages may exist simultaneou...

Error Message Elimination When an error message is displayed, always perform the following procedure. 1. Press and SAVE STATE. 2. Store the current state in a convenient STATE register. (It may be necessary to set to OFF.) Press and REALIGN LO IF . Wait for the sequence to finish. Press and RECALL S...

124 NOP IBLK 125 NOP STRNG 126 NO ? 127 BAD DTMD 128 PK WHAT? 129 PRE TERM 130 BAD TDF 131 ?? AM/FM 132 !FAV/RMP 133 !INT/EXT 134 ??? ZERO 135 ??? CURR 136 ??? FULL 137 ??? LAST 138 139 140 ?? PWRON” 141 BAD ARG 142 BAD ARG 143 NO PRESL 144 I-block format not valid here. Strings are not valid for th...

LO and RF Hardware/Firmware Failures (300 to 399) YTO Loop Errors (300 to 301) 300 YTO UNLK These errors often require troubleshooting the Al4 Frequency Controlassembly (Synthesizer Section) or the ADC circuits. YTO (1st LO) L oo is unlocked. The ADC measures p voltage under phase-lock condition. 30...

307 ACC 308 FREQ ACC 309 ACC 310 ACC 311 ACC 312 ACC 313 FREQ ACC 314 FREQ ACC Transfer oscillator pretuned DAC out of range. The transfer oscillator pretune procedure attempts to find pretuned DAC values byprogramming the PLL to 25 different frequencies and incrementingthe transfer oscillator pretu...

324 ACC 325 FREQ ACC 326 FREQ ACC 327 OFF UNLK 328 FREQ ACC 329 ACC Unable to adjust MAINSENSE 1 c ose to 0 volts using the coarse adjust DAC. The coarse adjust and fine adjust DAC are used together to setMAINSENSE to 0 volts with the loop opened. ERR 324 is set if thecoarse adjust DAC cannot bring ...

YTO Leveling Loop (334) This error often requires troubleshooting the Al4 Frequency Control assembly or A7 LODA (Synthesizer Section) or the ADC circuits. 334 LO AMPL LO Distribution Amplifier is unleveled. This error is usually accompanied by error codes 300 or 301. ERR 301 YTO UNLK iscleared once ...

405 RBW 406 RBW 407 RBW 408 RBW 409 RBW 410 RBW 411 RBW 412 RBW 413 RBW 414 RBW 415 RBW 416 RBW 417 RBW 3K 418 RBW 3K 419 RBW 3K 420 RBW 3K 421 RBW 422 RBW 423 RBW 424 RBW 3. If ERR 581 or ERR 582 appears, the fault is most likely caused by the Cal Oscillator. Refer to errors 581 and 582. 4. If ERR ...

425 RBW 3K 426 RBW 3K 427 RBW 3K 428 RBW 3K 429 RBW 100 430 RBW 300 431 RBW 432 RBW 3K 433 RBW 434 RBW 300 435 RBW 300 436 RBW 300 437 RBW 300 438 RBW 439 RBW 440 RBW 441 RBW 442 RBW 3K 443 RBW 3K 444 RBW 3K 445 RBW 3K 446 RBW 447 RBW 448 RBW 449 RBW 450 IF SYSTM 451 IF SYSTM 452 IF SYSTM 454 AMPL 4...

495 RBW 496 RBW 100 497 RBW 100 498 RBW 100 499 CAL UNLK 500 AMPL 30K 501 AMPL . l M 502 AMPL 503 AMPL 504 AMPL 30K 505 AMPL .lM 506 AMPL 5 0 7 AMPL 508 AMPL 30K 509 AMPL .lM Unable to adjust 10 Resolution Bandwidth. XTAL SWP GAIN Unable to adjust 100 Hz Resolution Bandwidth. Inadequate Unable to ad...

510 AMPL 511 AMPL 512 RBW 100 513 RBW 300 514 RBW 515 RBW 3K 516 RBW 517 RBW 100 518 RBW 300 519 RBW 520 RBW 3K 521 RBW 522 RBW 523 RBW 524 RBW 525 RBW 526 RBW 527 RBW 528 RBW 529 RBW 530 RBW Unable to adjust amplitude of 300 Resolution Bandwidth. Insufficient gain during LC BW Cal. Unable to adjust...

531 RBW 532 RBW 533 RBW 534 RBW 535 RBW 536 RBW 537 RBW 538 RBW 539 RBW 540 RBW 550 LOG AMPL 551 LOG AMPL 552 LOG AMPL 553 LOG AMPL 554 LOG AMPL 555 LOG AMPL 556 LOG AMPL 557 LOG AMPL 558 LOG AMPL 559 LOG AMPL 560 LOG AMPL 561 LOG AMPL 562 LOG AMPL 563 LOG AMPL Flatness correction data for Resolutio...

564 LOG AMPL 565 LOG AMPL 566 LOG AMPL 567 LOG AMPL 568 LOG AMPL 569 LOG AMPL 570 LOG AMPL 571 AMPL 572 AMPL 573 LOG AMPL 574 LOG AMPL 575 LOG AMPL 576 LOG AMPL 577 LOG AMPL 578 LOG AMPL 579 LOG AMPL 580 LOG AMPL 581 AMPL Unable to adjust amplitude of log scale. No compression inCalLogPower . Unable...

582 AMPL 583 RBW 30K 584 RBW Unable to adjust 100 and Resolution Bandwidths. Bad CALOSC Calibration in Sweep Rate. Test the 100 Resolution Bandwidth filter 3 bandwidth as follows: 1. Connect the CAL OUTPUT signal to the INPUT 50R. 2. Press (PRESET) and set the controls as follows: CENTER FREQ . . . ...

585 RBW 300K 586 RBW 587 RBW 30K 588 RBW 589 RBW 300K 590 RBW 591 LOG AMPL 592 LOG AMPL 593 LOG TUNE 594 LOG OFST 595 LOG ATTN 596 LOG FID 597 LOG OFST 598 LOG OFST 599 LOG GAIN Unable to adjust 300 Resolution Bandwidth. SYSBW and LCBW disagreement in LCCAL. Unable to adjust 1 MHz Resolution Bandwid...

The EEROM on A2 is used to store data for frequency responsecorrection, elapsed time, focus, and intensity levels. Error codes from 700 to 703 indicate that some part of the data in EEROM is invalid. An EEROM error could result from either a defective EEROM or an improper sequence of storing data in...

708 ROM 709 ROM 710 ROM Check-sum error of program ROM Check-sum error of program ROM Check-sum error of program ROM RAM Check Errors (711 to 719) The instrument power-on diagnostics check the program RAM. This includes the two used for STATE storage. If any STATE information is found to be invalid,...

Model Number Error (719) If this error occurs, return the instrument to a service center forrepair. 719 MODEL #? Could not read ID string from EEROM System Errors (750 to 757) These errors often require troubleshooting the A2 Controller and A3Interface assemblies. 750 SYSTEM 751 SYSTEM 752 SYSTEM 75...

Block Diagram Description The spectrum analyzer is comprised of the six main sections listed below. See Figure 6-4. The following descriptions apply to the Simplified Block Diagram and Overall Block Diagramlocated at the end of this chapter. Assembly level block diagrams are located in Chapters 7 th...

RF Section The RF Section includes the following assemblies: A7 LODA (LO Distribution Amplifier)A8 Low Band MixerA9 Input Attenuator A10 Tracking Generator (Option 002) All YTO (YIG-Tuned Oscillator) Al3 Second Converter Al4 Frequency Control Assembly (also in Synthesizer Section) Al5 RF Assembly (a...

Al3 Second Converter The Al3 Second Converter down-converts the 3.9107 1st IF to a 310.7 MHz 2nd IF. The converter generates a 3.6 second LO by multiplying a 600 MHz reference. filters remove unwanted harmonics of the 600 MHz driving signal. First IF and 2nd LO signals are filtered by cavity filters...

All YTO Spanwidth Sweep Applied To 20.1 MHz to 3.8107 All main coil 1.01 MHz to 20.0 MHz All FM coil 100 to 1 MHz Roller Oscillator PLL’s Main Oscillator 100 Hz to 100 Roller Oscillator PLL’s Offset Oscillator When the sweep ramp is applied to one of the the analyzer must prevent this loop from tryi...

Y T O / R O L L E R O S C I L L A T O R P L L L O O U T P U T 3.0 6.81 I Y T O I O F F S E T L O C K M H z T C X O S K 1 6 8 Figure 6-5. Phase Lock Loops Roller Oscillator PLL (P/O A14) This output serves as the reference frequency for the YTO PLL. A one-to-one relationship in frequency tracking exi...

An Automatic IF Adjustment, in analyzer firmware, sets center frequency and 3 bandwidth of all filter poles through varactor and PIN diodes. The firmware also controlscrystal-pole symmetry and the step gain amplification. Section The ADC/Interface Section is the link between the Controller Section a...

ADC The HP 8560A uses a successive-approximation type of ADC. The ADC Algorithmic State Machine (ADC ASM) controls the interface between the Start/Stop Control and the ADC itself, switching between positive and negative peak detectors when the NORMAL detector mode is selected, and switching the Ramp...

EEROM The EEROM stores important amplitude-related correction data. This includes data formixer-bias and RF Gain (flatness correction). The analyzer serial number, model number, and installed options are also stored in EEROM. Firmware The analyzer firmware reads the model number and installed option...

Section The ADC/Interface Section includes the Keyboard, RPG (rotary pulse generator), and A3 Interface assemblies. Table 7-l lists signal versus pin numbers for control cable W2. Troubleshooting Using the TAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Table 7-1. W2 Control Cable Connections (2 of 2) Signal A GNDSCAN RAMP VIDEO TRIGGER A GND NCR/T DAC2 R/T (pins) 45 * Indicates signal source connectors (pins) 44 47 (pins) 7 4 (pins) 44 47 50 Section 7-3

Troubleshooting Using the TAM When using Automatic Fault Isolation, the TAM indicates suspected circuits that need to bemanually checked. Use Table 7-2 to locate the manual procedure. Table 7-3 lists assembly test connectors associated with each Manual Probe Troubleshootingtest. Figure 7-l illustrat...

Table 7-2. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation ADC ASM ADC MUX ADC Start/Stop Control Analog Bus Drivers Analog Bus Timing Interface Strobe Select Keyboard Interface Negative Peak Detector Peak Detector Reset Positive Peak Detector Ramp Count...

Table 7-3. TAM Tests Versus A3 Test Connectors Connector Manual Probe Troubleshooting Test Measured Signal Lines Video Input to Interface Video to Rear Panel MS2 Video MUX M S 3 LOG Offset/LOG Expand MS3 Video Filter Buffer Amp. MS3, MS5, OS1 Video Peak Detectors MS5, MS6 ADC MUX M S 6 Variable Gain...

Problems Keyboard Interface See function block G of A3 Interface Assembly Schematic Diagram (sheet 3 of 6). A pressed key results in a low on a keyboard sense line (LKSNSO through LKSNS7). This setsthe output of NAND gate high, generating KBD/RPG-IRQ. The CPU determines the key pressed by setting on...

RPG Interface See function block J of A3 Interface Assembly Schematic Diagram (sheet 3 of 6). latches the RPG direction from the two RPG outputs, and Counterclockwise RPG rotation produces low-going pulses which result in a high output on Clockwise RPG rotation results in a low output from provides ...

Table 7-5. Counter Frequencies pin # Nominal Frequency (Hz) 3 3900 4 1950 5 975 6 488 11 244 1 0 1 2 2 Triggering Problems See function block H of A3 Interface Assembly Schematic Diagram (sheet 3 of 6). The 1 MHz ADC clock provides synchronization in FREE RUN and SINGLE triggering. LINE triggering s...

Flatness Control (RF Gain See function block M of A3 Interface Assembly Schematic Diagram (sheet 4 of 6). RF Gain control the Al5 assembly’s flatness compensation amplifiers. The RF Gain are arranged so that the output of one DAC is the voltage reference for the other DAC. This results in an RF GAIN...

A3 Assembly’s Video Circuits Voltages from to Variable Gain Amplifier correspond (approximately) to on-screen signal levels. (One volt corresponds to the top of the screen and zero volts corresponds to the bottom of the screen.) This is true for both log and linear settings except when the analyzer ...

22. Change the reference level from -10 to 0 The voltage change on should be between 670 and 730 If the voltage change is outside of these limits, refer to “Variable Gain Amplifier (VGA)” in this chapter. The gain of the VGA should be 7 Log Offset/Log Expand See function block X of A3 Interface Asse...

4. Step the Video BW down to Hz. At each step, the amplitude of the LO feedthrough should decrease. 5. Refer to Table 7-7 and check for correct latch settings for the selected video bandwidth setting. 6. If latch output is not correct, trigger an oscilloscope on pin 9) and monitor pin 1 and other la...

Positive/Negative Peak Detectors See function blocks Y and Z of A3 Interface Assembly Schematic Diagram (sheet 5 of 6). The following information pertains to the positive peak detector and is applicable totroubleshooting the negative peak detector. The positive peak detector consists of an input amp...

8. If the reset pulses are absent, troubleshoot the Peak Detector Reset circuitry. 9. If the reset pulses are present, check the gate of The pulses should be positive-going from -12.7 V to -1.35 V. 10. The peak detector can be made into a unity gain amplifier by shorting the cathode of CR203 to the ...

1. Press on the HP 8560A and set the controls as follows: C E N T E R F R E Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...300 MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Variable Gain Amplifier (VGA) See function block AB of A3 Interface Assembly Schematic Diagram (sheet 6 of 6). The VGA provides adjustable gain in the video path. Its nominal gain of 7 can be adjusted U112 removes dc offset to keep U113 in its monotonic range. (Both U112 and U113 are set to the same...

A3 Assembly’s ADC Circuits The ADC consists of a 12-bit DAC, successive approximation register (SAR), data multiplexers, and data latches. The ADC ASM (algorithmic state machine) controls the ADC. Eight inputs are controlled by the ADC MUX. These include a positive peak detector, negative peak detec...

ADC Start/Stop Control See function block B of A3 Interface Assembly Schematic Diagram (sheet 2 of 6). The ADC Start/Stop Control determines the start time of all ADC conversions. Multiplexer chooses the source of the start signal. Both HSTART-SRC and HBUCKET tell the ASM to start a conversion. 1. P...

A3 Assembly’s Control Circuits A digital control problem will cause the following three steps to fail. 1. On the HP press MAN, and 2. A click should be heard after pressing in step 1, unless was previously set to 70 3. Press and Another click should be heard. If no clicks were heard, but the value d...

14. If any address or data line is low, check the appropriate input of either (data lines) or (address lines). 15. If a data line input is stuck low, check the data bus buffer. If an address line input is stuck low, check and the A2 Controller assembly. 16. If the appropriate input is high or toggli...

13. Monitor pin 9 (LV_STB) with an oscilloscope or logic probe. This is the strobe for the A4 Log Amplifier/Cal Oscillator assembly. 14. Press and check that pulses occur when toggling between LINEAR and LOG . Interface Strobe Select See function block K of A3 Interface Assembly Schematic Diagram (s...

Note Because the Cal Oscillator circuitry on the A4 assembly is such an integral part of the IF adjustment, always check this assembly first, before checkingthe rest of the IF Section. A faulty Cal Oscillator can cause many apparent “faults” in the rest of the IF Section. Troubleshooting Using the T...

Table 8-1. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Check Cal Oscillator on A4 Assembly Check Input Switch on A5 IF Assembly Check Linear Amplifiers on A4 Assembly Check Log Expand on A3 Interface Assembly Check Step Gains on A5 IF Assembly Check ...

10 7 MHz C A L O S C i D C J 3 I I L I N E A R I I I L I F A D J O F F W 5 4 D I S C O N N E C T E D L O G I I W I T H C O U N T E R O N i B U R S T S O F 5 . 3 5 M H z I A P P R O X 1 0 w 5 3 I J 5 I ( B R O W N ) w 5 5 D E M O D I ( W H I T E / I B L U E ) , A 4 L O G A M P / C A L O S C A S S E M...

3. Set the other spectrum analyzer controls as follows: SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 MHzREFERENCE LEVEL . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . C E N T E R F R E Q...

Table 8-3. Sweep Width Settings S w e e p W i d t h S w e e p T i m e R E S B W R A N G E M A 1 M A O Adjusted 20 5 ms 10 V 0V 0V 10 10 ms 3 V 0 V 4 30 ms 1 +5 V +5 V 0 V 2 60 ms 300 Hz +5 V V V Automatic IF Adjustment The spectrum analyzer performs an automatic adjustment of the IF Section whenever...

Parameters Adjusted The following IF parameters are adjusted in the sequence listed: 1. Amplitude A. Video Offsets: analog (using A4 Log Amplifier video offset DAC) and digital (applying stored constant to all readings) 1. Linear Scale Offset 2. Log Scale Offset a. and Narrowband modes. b. 0 to 60 r...

B. 10 resolution bandwidth 1. Center frequency of LC tank that loads the crystal 2. Symmetry adjustment to cancel crystal case capacitance. 3. Bandwidth C. 3 resolution bandwidth: center frequency of LC tank and bandwidth of resolution b a n d w i d t h D. 1 resolution bandwidth: bandwidth E. 300 Hz...

Performance Test Failures Failures in IF-Section-related performance tests may be investigated using the following information. IF Gain Uncertainty Performance Test Failure of this performance test indicates a possible problem with the spectrum analyzer IF gain circuits. Assuming no major IF problem...

A4 Assembly’s Log Amplifier Circuits The Log Amplifier on the A4 assembly performs several functions. It provides log and linear paths converting the 10.7 signal to video. In addition it also provides offset circuitry, AM/FM demodulator circuitry, a frequency counter output, and down conversion of t...

10. If log fidelity is poor near the bottom of the screen or the 1 MHz resolution bandwidth is narrow, a fault might exist in the wide/narrow filter switch. Refer to function block Gof A4 Log Amplifier Schematic Diagram in the HP Spectrum Analyzer Component Level Information binder. Check this switc...

Video Offset Refer to function block P of A4 Log Amplifier Schematic Diagram (sheet 3 of 4) in the HP Spectrum Analyzer Component Level Information binder. The circuit provides a programmable video offset, with a step size of 5 from -300 to 1. On the spectrum analyzer, press (SPAN), ZERO SPAN, 1 [AM...

f. Press ( FREQUENCY SPAN ), 2 The response should now be displayed right-side up. Ignore any “wings” to the left and right of the passband. g. The amplitude at 4.5 and 5.1 relative to 4.8 should be 0 to -2.5 10.6952 MHz VCXO Refer to function block E of A4 Log Amplifier Schematic Diagram (sheet 2 o...

Synchronous Detector A wide dynamic range linear detector is realized by the Limiter (block G), the Isolation Amplifier (block H), the LO Amplifier (block I), and the Detector/Mixer (block J). Thecombination of these circuits form what is commonly known as a synchronous detector. The input signal is...

Sum and difference frequencies are produced in the Detector/Mixer. The difference frequency produces video (dc to approximately 3 MHz), since the two signals are at the same frequency. During digital resolution bandwidths the two signals are separated by 4.8 Log Offset/Gain Compensation Refer to fun...

A5 IF Section The input switch connects the IF to either the A4 Cal Oscillator or the 10.7 MHz IF output from the Al5 RF assembly. The Automatic IF Adjustment uses the A4 Cal Oscillator at instrument turn-on and between sweeps to align the IF filters and step-gain amplifiers. During sweeps the input...

R E F 1 0 . 0 2 0 5 S A M P L E I I I I I C E N T E R 1 0 . 7 0 0 0 0 0 M H z S P A N 0 H z R E S B W 3 0 0 V B W 3 0 0 S W P 5 0 0 S K 1 7 4 Figure 8-5. Detailed IF Adjust Signature (2) R E F 1 0 . 0 2 0 1 0 S A M P L E 1 C E N T E R 1 0 . 7 0 0 0 0 0 M H z S P A N 0 H R E S B W 3 0 0 V B W 3 0 0 S...

Common IF Signature Problems n Region A of Figure 8-4 is noisy: Suspect the first LC pole. n Region B of Figure 8-4 is flat: Suspect the third step-gain stage, the fine attenuator, or the fourth LC-pole output amplifier. Region C of Figure 8-4 has no 15 step: Suspect the reference 15 attenuator. n R...

R E 5 S A M P L E C E N T E R I”.; 20 1 0 . 7 0 0 0 0 0 S P A N 0 H z R E S B W 3 0 0 V B W 3 0 0 S W P 5 0 0 S K 1 8 1 Figure 8-12. Region B Amplitude Offset 1 MHz Resolution Bandwidth Problems Check the crystal shorting switches as follows: 1. On the spectrum analyzer, press and set the controls a...

30 Resolution Bandwidth Problems Shape factor too high: Shape factor is the ratio of the 60 bandwidth to the 3 bandwidth. Shape factor should be less than If one of the LC poles malfunctions, the shape factor may be the only indication of the failure. Isolate the non-functioning pole withthe IF sign...

1 0 d B R L O d B m C E N T E R S P A N 1 0 0 V B W S W P 7 0 m s S K 1 8 4 Figure 8-15. Faulty Crystal Symmetry Step Gains Refer to function blocks B, H, and I of A5 IF Filter Schematic Diagram (sheets 1 of 3 and 2 of 3) in the HP Spectrum Analyzer Component Level Information binder. On the spectru...

A4 Assembly’s Cal Oscillator Circuit The Cal Oscillator on the A4 assembly supplies the stimulus signal for Automatic IFadjustments. Normally, the oscillator operates only during retrace (for a few milliseconds) to adjust part of the IF. (All IF parameters are to be readjusted about every 5 minutes....

e. If the DVM reading is outside the range in step c but inside the range in step d, suspect one of the filter-reactive components. 8. If the ALC loop is working correctly pin 4 within the test tolerances given), then either the output attenuator is defective, or pin 6 (in ALC loop integrator) is ou...

Low-Pass Filter Refer to function block AB of A4 Cal Oscillator Schematic Diagram in the HP Spectrum Analyzer Component Level Information binder. 1. Connect a DVM positive probe to pin 4. 2. On the spectrum analyzer, press Press FULL IF ADJUST. Observe the DVM reading between the displayed messages ...

The Controller Section includes the A2 Controller Assembly, A19 HP-IB Assembly, and Battery. The presence of a display (graticule and annotation) verifies that most of A2 Controller Assembly is operating properly. Troubleshooting Using the TAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Table 9-1. TAM Tests Versus Test Connectors Connector Probe Troubleshooting Test Measured Signal Lines ADC/MUX Test MS3 through MS6, MS8 DAC Test MS2, MS7, OS1 10 Volt Reference Test MS4 Switch Drive Test MS8 Buffered X Y DAC Outputs MS2, MS7 X Line Gen Test MS6 Y Line Gen Test MS1 Intensity Offset ...

( T A M T E S T C O N N E C T O R ) Figure 9-1. A2 Test Connectors 10. Press SOFT KEY The results will be sent to the printer. 11. If a failure is indicated in any of these tests, the fault lies on the A2 Controller assembly. To obtain more information: a. Press the down arrow key one less time than...

Digital Signature Analysis (DSA) Digital Signature Analysis (DSA) places microprocessor, in a simplified known state. This simplified state consists of placing a one-word instruction, MOVE QUICK, ( 0 1 1 1 X X 1 0 X X X X on the data bus. The microprocessor cycles through its address range continual...

5. Compare the signals at the following test points with those illustrated in Figure 9-2. X A2J202 pin 14 Y pin 3 Z OUT: pin 3 BLANKING: A2J202 pin 15 Note Waveforms displayed on an analog scope may show considerably more spikes.This is normal and is due to the wider displayed bandwidth. 6. Troubles...

4. Compare the blanking-circuit input signals at the following test points with those illustrated in Figure 9-3. BLANKING: J202 pin 15BLANK: U214 pin 12VECTOR: U214 pin 11 U213 pin 13 5. The waveforms in Figure 9-3 must match the timing of the vectors being drawn. To do this, is used to adjust the l...

B L A N K I N G 4 . 0 0 2 . 5 0 V 2 . 0 9 6 . 0 0 u s I L S K 1 9 3 Figure 9-4. Expanded Blanking Waveforms Display Jumbled or Trace Off Screen See function blocks D and I of A2 Controller Schematic Diagram (sheet 1 of 4) in the Component-Level Information binder. The two line generators are identic...

13. Figure 9-8 illustrates the waveforms of properly working line generators. Whenever there is a pulse on or TP2, the appropriate integrator or generates a ramp (the output vector) which feeds back to and shows on its output. 5 . 0 0 . 0 0 v 1 . 0 0 0 000 S K 1 9 5 Figure 9-6. Distorted X/Y Line Ge...

a 0 0 0 . 0 0 v 1 0 . 0 0 . 0 0 0 s T P 2 1 S K 1 9 7 Figure 9-8. Normal X/Y Line Generator Waveforms Intensity 1. 2. 3. 4. 5. The length of the vector being drawn can effect intensity and Refer to “Long Lines Dimmer Than Short Lines” in this chapter. Short pin 2 to pin 7. If the display does not br...

Long Lines Dimmer Than Short Lines See function block M of A2 Controller Schematic Diagram (sheet 1 of 4) in the HP Spectrum Analyzer Component Level Information. The Z Output function block contains the absolute value circuits which determine the intensity of vectors drawn on the display. The vecto...

9. The waveforms should look like those illustrated in Figure If the waveform at pin 14 is bad, troubleshoot the Y Line Generator (function block I of A2 Controller Schematic, sheet 1 of 4 in the Component-Level Information binder). 10. If the waveform at pin 14 is bad, troubleshoot the Z Output cir...

6. In Figure 9-11, there is no synchronization between and the video patterns X POS and Y POS when is TTL high. The Y POS level when is low is the Video In level. 5 . 0 0 0 . 0 0 v 5 . 0 0 . 0 0 0 s D E F 1 x Y S K 1 1 0 0 Figure 9-11. Synchronization Frequency-Count Marker Problems The FREQ COUNT f...

Frequency Counter See function block of A2 Controller Schematic Diagram (sheet 4 of 4) in theComponent-Level Information binder. The frequency counter counts the frequency of the last IF and provides accurate timing signals for digital zero-spans. The circuit also provides timing signals to the A3 I...

1. Disconnect W22 from 2. If a 10 MHz, TTL-level signal is not present at the end of W22 continue with step 3. If a 10 MHz signal is present at W22, proceed as follows: a. Reconnect W22 to b. Set the HP 8560A to the following settings: SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Keyboard Problems If the analyzer does not respond to keys being pressed or the knob being rotated, the faultcould be either on the A3 Interface assembly or the A2 Controller assembly. To isolate the A2 Controller assembly, use the following procedure. This procedure tests the analyzer response over...

Caution Using an active probe, such as an HP with a spectrum analyzer is recommended for troubleshooting the RF circuitry. If an HP 1120A Active Probe is being used with a spectrum analyzer, such as the HP HP and the HP having dc coupled inputs, either set the active probe for an ac coupled output o...

10. Set the HP 8560A to the following settings: CENTER FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11. If the 1st LO is present, a s...

B N C C A B L E F R E Q U E N C Y C O U N T E R I ED F R E O U E N C Y S T A N D A R D E X T C A B L E T E S T C A B L E A S K 1 1 0 2 Figure 10-2. Sampler and Sampling Oscillator Test Setup 24. At each combination, the frequency counter should measure a sampler IF of 100.2 MHz Hz. (The Offset sampl...

Table 10-2. Sampling Oscillator Test Frequencies HP 8560A H P 8 3 4 0 A Frequency of Offset Frequency (MHz) CW Frequency (MHz) Sampling Oscillator (MHz) 3 8 9 . 5 4300.2 280.0 427.0 4337.7 282.5 4 4 9 . 5 4360.2 284.0 464.5 4375.2 285.0 4 7 9 . 5 4 3 9 0 . 2 286.0 502.0 4412.7 287.5 5 0 9 . 5 4420.2...

n To display the nominal frequency, press (CAL), MORE, FREQ DIAGNOSE, LO FREQ . Table 10-3. YTO Frequency in TEST Position Roller Oscillator Frequency YTO Pretune Accuracy Nominal YTO Frequency -104 to -93 MHz MHz LO Frequency MHz -93 to -73 MHz MHz LO Frequency -73 to -65 MHz MHz LO frequency -10 M...

Table Automatic Fault isolation References (1 of 2) Suspected Circuit Indicated by Automatic Fault Isolation Check the YTO Loop Check 1st LO Check 1st LO Pretune Frequency and Amplitude Check 3rd LO Drive Check 10 MHz Reference to Phase Frequency D e t e c t o r Check for 10 MHz Signal at Other Inpu...

General PLL Troubleshooting The Synthesizer Section relies heavily on Phase-Lock Loops (PLL). Typically, faulty PLL’s are either locked at the wrong frequency or unlocked. The information below applies totroubleshooting these two classes of problems on a generalized PLL. PLL Locked at Wrong Frequenc...

Frequency Span Accuracy Problems The HP 8560A employs lock-and-roll tuning to sweep the 1st LO. The 1st LO is locked to thestart frequency immediately after the previous sweep has been completed. The 1st LO is thenunlocked, and, when a trigger signal is detected, the 1st LO sweeps (rolls). When ther...

3. Use the following equation to determine the first-LO span used. First LO Span = Display’s Span Setting Current Band’s Harmonic Mixing Number 4. Refer to Table to determine the circuit associated with the span. Confirming Span Problems 1. If all first-LO spans or only first-LO spans of 1.01 MHz or...

13. The voltage at pin 2 should be approximately 19% of the voltage at A14523 pin 2. 14. If the 1st LO frequency did not change in step 12, set the HP 8560A’s (LINE) switch OFF and disconnect from 15. Place a jumper between pins 9 and 10 and set the (LINE) switch ON. On the HP 8560A press STATE, STA...

3. If pin 1 does not appear to be correct, verify that the sweep ramp is reaching the S weep Switch as follows: Change the oscilloscope’s amplitude scale to 1.25 and monitor the pin 14. The waveform should be a 0 V to -10 V sweep of 50 ms duration. See Figure 10-7. Check for a 0 V to -10 V ramp at p...

Unlocked YTO PLL Operation The All YTO is locked to two other oscillators, the Roller PLL’s Main Oscillator and the Offset PLL’s Sampling Oscillator. For LO spans of 1.01 MHz and above, either the FM or Main Coil of the YTO is swept directly. For LO spans of 1 MHz and below, the Roller PLL’sMain Osc...

Table 10-l 1. Amplifier Polarities Y T O E r r o r VCO Sweep E R R S G N VCOSGN Sign Driver p i n p i n oller’s Offset Oscillator Swept Positive Sampler IF Negative Sampler IF Positive Negative Negative Negative TTL High TTL Low TTL Low TTL High Roller’s Main Oscillator Swept Positive Sampler IF Neg...

4. Measure the YTO frequency at the front-panel’s LO OUTPUT jack and record below: YTO Frequency (measured) = MHz A l 4 F R E Q U E N C Y C O N T R O L A S S E M B L Y M A I N C O I L T U N I N G F M C O I L T U N I N G I I T I I I S A M P L E R I - - - R O L L E R T E S T A P P R O X - 3 0 63 TO 10...

3 3 . If the voltage monitored in step 23 is correct with a 0 output but not with -15 output, suspect or If the voltage does not change, check the YTO PLL Loop’s divide-by-two circuits as follows: Set the signal generator for an 80 MHz output. Measure pin 2 with an active probe and a spectrum analyz...

41. The Main Coil Coarse and Fine correct any initial pretune errors in the YTO main coil. The adjust the FM-coil current to zero before any sweep begins. Refer to function block I of Al4 Frequency Control Schematic (sheet 2 of 5). 42. Set the HP 8560A to the settings listed below. These set both to...

Unlocked Roller Oscillator PLL Operation The Roller Oscillator is used in the HP 8560A as a reference for the 1st LO phase-lock loop.It provides the 25 Hz start-frequency resolution for the 1st LO, and is the means by which the 1st LO is swept in LO spans of 1 MHz or less (Roller spans). It is compo...

3. If the Roller Oscillator measures a stable 94.7 MHz, the Roller Oscillator are probably locked. 4. If the Roller Oscillator is off-frequency or unstable and no error message is displayed, check Roller MUX Roller MUX Amplifier U328, and MUX Gain Control Switch Refer to function block AG of Al4 Fre...

Unlocked Offset Lock Loop (Sampling Oscillator) Operation The Offset Lock Loop drives the Sampler. The Offset Lock Loop’s sampling oscillator tunes to one of fifteen discrete frequencies between 280 MHz and 298 MHz. Refer to Al5 Schematic (sheet 3 of 3). M ixer mixes the oscillator’s output with 300...

Unlocked Reference PLL Operation The Reference 600 MHz output is generated by a 600 MHz SAWR (Surface Acoustical Wave Resonator) VCO. The SAWR provides a high Q feedback path in the oscillator ensuring good phase noise. If the oscillator is off-frequency, the phase-lock circuitry is probably at faul...

3. If the signal at is low, but the signal at is correct, press INTERNAL SIG ID OFF. 4. Check that PIN diode switches CR603 and CR605 are reverse biased by approximately +10 Vdc. Refer to function block F of Al5 RF Schematic (sheet 1 of 3). 5. Measure 300 MHz signal at using an active probe/spectrum...

Sweep Generator Circuit The Sweep Generator operates by feeding a constant current from DAC into an integrator, See function block K of Al4 Frequency Control Schematic (sheet 2 of 5). This current is scaled by resistors R20 through R24 and See Figure The capacitors used in the integrator depend on t...

l R O L L E R I P L L ’ S 1 I I Ih - - - e - - R O L L E R T E S T A P P R O X 6 3 T O 1 0 5 . 5 M A I N R O L L E R 1 3 0 1 S A M P L E R I F w 3 4 B L A C K w 3 2 R F A S S E M B L Y - 1 5 T O 0 6 3 T O 1 0 5 . 5 M H z W H E N L O C K E D , S A M E A S M A I N R O L L E R 1 0 M H z A P P R O X II ...

S A M P L E R A l 5 - 1 5 T O I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A l 4 F R E Q U E N C Y C O N T R O L Y T O L O O P I I I I I I I I I I I I I I I I I I I I I I I I I I Y T O L O O P ERROR TO F M C O I L I D R I V E R 1 56 MHz/V T U N E D A C V C O R A ...

W 3 4 L O S A M P C A L O U T P U T T O F R O N T P A N E L T O S I G I D O S C I L L A T O R -9 RF I T T L L E V E L S L O D R I V E R M I X E R I I O S C I T P 4 0 0 0 I , T T L I I 1 0 M H z 1 0 M H z T C X O O F F S E T P L L I T T L L E V E L I I I I I I I T T L 600 MHz 2 N D L O D R I V E 0 1 ...

Caution Use of an active probe, such as an HP with another spectrum analyzer is recommended for troubleshooting the RF circuitry. If an HP 1120A Active Probe is being used with a spectrum analyzer, such as the HP HP and the HP h aving dc coupled inputs, either set the active probe for an ac coupled ...

Table 11-l. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Check 2nd IF Amplifier Check 2nd IF Distribution Check 10.7 MHz IF Out of Double Balanced Mixer Check 300 MHz CAL OUTPUT Check A7 1st LO Distribution Amplifier Check A9 Input Attenuator Check Al...

Table 11-2. TAM Tests versus Test Connectors Connector A15J502 Manual Probe Troubleshooting Tes Main Coil Course DAC LODA Drive Second Conv PIN Switch Second Conv Mixer Bias Second Conv Drain Bias Second Conv Doubler Bias Second Conv Driver Bias First Mixer Drive Switch First Mixer Drive DAC Revisio...

6. Check Al3 Second Converter mixer diode bias at pin 1. The bias voltage should be between -150 and -900 7. Troubleshoot the signal path. Refer to the power levels listed on Figure 11-3, RF Section Troubleshooting. Low Band Problems On the HP 8560A press and REALIGN LO IF . If any error messages ar...

Al4 Frequency Control Assembly Note The block diagrams for the Al4 and Al5 assemblies are located in Chapter 10, Synthesizer Section. A7 LODA Drive See function block Z of Al4 Frequency Control Schematic Diagram (sheet 3 of 5) in theComponent-Level Information binder. 1. Set the HP 8560A to the foll...

L O D I S T R I B U T I O N , 1 Y T O J4 1 SAMPLER MIXER OUT OUT -9 13 TO TO -2 16 J 3 I I L O O U T 1 4 . 5 T O 1 8 . 5 - - - - - SCHEMAT I A S V I N C R E A S E S A 7 O U T P U T I N C R E A S E S R E F V O L T A G E L S K 1 1 1 5 Figure 11-2. A7 LODA Drive Al5 RF Assembly Note The block diagrams ...

1. Set the HP 8560A to the following settings: TRIGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..SINGLE SIG ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON 2. U...

A10 Tracking Generator (Option 002) Block Diagram Description The A10 Tracking Generator consists of several smaller circuits. The A10 is not component-level repairable; a rebuilt exchange assembly is available. The block diagram of the tracking generator is unique in that it only recreates one of t...

Output Amplifier The output amplifier low-pass filters the signal emerging from the Output Mixer and thenamplifies it into a usable range. The amplifier also contains a detector for leveling the output. Bias Board The bias board contains the ALC circuitry for the tracking generator and distributes d...

3. Check maximum power available from the TG. Connect the RF OUT to the INPUT Press LOG dB/DIV TRACKING , SRC PWR ON , MORE OF 3 , ALC EXT. No connection should be made to the ALC EXT INPUT connector on the rear panel. The available power shouldalways be greater than If the output is unleveled only ...

3. Check for excessive LO feedthrough. Use the LO Feedthrough performance test in the Installation and Verification Manual, but check over a Center Frequency range of 300 to 100 MHz. The LO Feedthrough will be 3.9107 greater than the Center Frequency setting. Harmonic/Spurious Outputs Too High Harmo...

Display/Power Supply Section The Display/Power Supply Section contains the A6 Power Supply, HV Module, Al7 CRT Driver, and Al8 CRT. Figure 12-1 illustrates the section block diagram. Table 12-1 lists signal versus pin numbers for Power Cable P a g e Troubleshooting Using the TAM . . . . . . . . . . ...

W H E N T R O U B L E S H O O T I N G T H E P O W E R S U P P L Y U S E A N I S O L A T I O N T R A N S F O R M E R A N D C O N N E C T T O F R O N T P A N E L L E D L I N E F L 4 I F A N A 6 - 1 2 V O L T A G E S E L E C T O R O N R E A R P A N E L ) - 1 5 C R T S U P P L Y - 1 5 v H V = H V O N ) ...

Table 12-1. Power-Cable Connections (2 of 2) Signal V V V V V V LINE TRIGGER + 1 5 V + 1 5 V - 1 5 V - 1 5 V 1 2 1 1 1 0 9 876 39 404 1424344 4 54 64 74 84 9 50 * Indicates signal source connectors. 4 0 * 42* 4 1 4 J 1 Table 12-2. Automatic Fault Isolation References Suspected Circuit Indicated Manu...

A l 7 C R T D R I V E R Blank Display C O N N E C T O R ) S K 1 1 2 1 Figure 12-2. Al7 Test Connector Table 12-3. TAM Tests versus Test Connectors Probe Troubleshooting Test Revision X-Deflection Amplifier Constant Current Source Focus Amplifier Bias Intensity Amplifier Bias Intensity Input Intensit...

I F R O N T V I E W I , I I S K 1 1 2 2 Figure 12-3. Probe Power Socket 5. If all of the power supply indicators along the outside edge A2 Controller assembly are lit, the A6 Power Supply is probably working properly. 6. Press FREQUENCY, 7. Allow the analyzer to warm-up for at least one minute. 8. W...

3. Perform the Display Adjustment in Chapter 2. Isolate the problem to either the X or Y axis by noting the behavior of the adjustments. If the line generator or fast zero-span portion of the adjustment fails, troubleshoot the A2 assembly. 4. If the adjustments do not remedy the problem, set the HP ...

6. Turn off the analyzer and place Al7 in the service position. Connect the ground lead of a high-voltage probe (HP 34111A) to the chassis, and use it with a DVM to measure 10). 7. The nominal voltage is -1600 Vdc, but the CRT will function with this voltage within 200 V of -1600 Vdc. 8. Adjusting C...

A6 Power Supply Assembly The HP 8560A uses a switching power supply operating at 40 to supply the low voltages for most of the analyzer hardware and a 30 switching supply (CRT Supply) to provide the high voltages for the CRT display. The CRT Supply will be treated as a separate supplysince the remai...

Power Up See function block M of A6 Power Supply Schematic Diagram in the Component-Level Information binder. The Power Up circuitry generates the PWR UP signal, which tells the microprocessor that the supplies are up and stable. PWR UP will go high when the Vdc supply exceeds +4.99 Vdc. PWR UP will...

Component-Level Information Packets Component-Level information is available for selected instrument assemblies. The information for each repairable assembly is provided in the form of Component-Level Information Packets (CLIP S ). Each CLIP contains a parts list, component-location diagram, and sch...

Table A-l. HP 8560A Spectrum Analyzer Documented Assemblies Board Assembly Instrument Assembly CLIP Part Number* Serial Part Number Keyboard 2913A through 3147A 08562-60031 08562-90110 3204A and above 08562-60140 A2 Controller Assembly 2913A through 2925A 2948A through 2949A 3003A through 3124A 3128...

Table A-l. HP 8580A Spectrum Analyzer Documented Assemblies (continued) Board Assembly Instrument Assembly CLIP Part Number’ Serial Prefix Part Number Al4 Frequency Control (Opt. 005) 3133A through 3217A 08560-60058 08560-90073 3218A and above Al5 RF Board (Std, Opt. 001, 002, 012) 3029A through 311...

Table A-2. A4 and A18 Assemblies Shipped with HP 8560As Serial Prefixed below 3207A Board Assembly Instrument Assembly CLIP Part Number Serial Part Number A4 Log Amplifier 2913A through 2948A 08560-60010 08560-90022 2929A 08560-60033 08560-90023 2950A through 3204A 08560-60035 08560-90024 Al6 CAL OS...