Agilent 856290216 - Manual

General Safety Considerations This is a Safety Class I product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in asocket outlet provided with a protective earth contact. Any interruption of theprotective conductor, inside or outside...

How to Use This Guide Chapter 7, “General Troubleshooting,” can be used to identify the location of a problem to a board or functional area in the spectrum analyzer. Chapters 8 through 13, which cover the functional areas, can then be used to help you localize the problem further. Once the faulty ar...

Contents 1 . G e n e r a l I n f o r m a t i o n Serial Numbers and Repair Information . . . . . . . . . . . . . . . . . Instrument Variations . . . . . . . . . . . . . . . . . . . . . . . . . HP 85629B Test and Adjustment Module . . . . . . . . . . . . . . . . Service Kit . . . . . . . . . . . . . ...

3. 16. YIG-Tuned Filter/Mixer (RYTHM) Adjustment . . . . . . . . . . . 2-60 17. 16 MHz PLL Adjustment . . . . . . . . . . . . . . . . . . . . . 2-63 18. 600 MHz Reference Adjustment . . . . . . . . . . . . . . . . . . 2-66 Frequency Response Adjustment Software Getting Started . . . . . . . . . . . ...

Cal Factor outside of 0 to 150% range entered . . . . . . . . . . . . CONDITIONS file from system file location is not compatible! WARNINGConditions Menu DUT ID disagrees with responding DUT ID . . . . . Data not accepted, check entry format . . . . . . . . . . . . . . . .DUT doesn’t respond at addr...

Offset Lock Loop (part of A15) . . . . . . . . . . . . . . . . . . .Fractional N PLL (part of A14) . . . . . . . . . . . . . . . . . . . IF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4 Log Amplifier/Cal Oscillator Assembly . . . . . . . . . . . . . . A5 IF Assembly . . . . . ...

Low Voltage Supplies . . . . . . . . . . . . . . . . . . . . . . . . 13-15 Buck Regulator Control Loop . . . . . . . . . . . . . . . . . . . . 13-15 High Voltage Supplies . . . . . . . . . . . . . . . . . . . . . . . . 13-15 CRT Supply Dropping Out . . . . . . . . . . . . . . . . . . . . . . 13-16 B...

Figures l-l. Example of a Static-Safe Workstation . . . . . . . . . . . . . . . . . l-2. Spectrum Analyzer Shipping Container and Cushioning Materials . . . . . 2-l. High Voltage Power Supply Adjustment Setup . . . . . . . . . . . . . 2-2. Display Adjustment Setup . . . . . . . . . . . . . . . . . ....

Tables Contents-15 l-l. Instrument Variations . . . . . . . . . . . . . . . . . . . . . . . . l-2 l-2. Service Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . l - 4 l-3. Static-Safe Accessories . . . . . . . . . . . . . . . . . . . . . . . . l-6 l-4. Recommended Test Equipment . . . . ....

General Information This HP Spectrum Analyzer Service Guide contains information required to adjust and service the HP 85623 to the assembly level. Serial Numbers and Repair Information Hewlett-Packard makes frequent improvements to its products to enhance performance, usability, or reliability. Hew...

HEWLETT P A C K A R D I Earlier Serial Number Label Example The new serial number format (USOOOOOOOO) is always considered “above” the earlier format (OOOOAOOOOO) h y w en ou encounter change information such as . . . serial prefix 3425A and above” or . . . serial number and above.” Instrument Varia...

HP 85629B Test and Adjustment Module When attached to the rear panel of the spectrum the HP 85629B test and adjustment module (TAM) provides diagnostic functions for the HP 85623. The TAM isaccessed by a computer running interface software; this software is supplied with Option 915,add Service Docum...

Service Kit The spectrum analyzer service kit (HP part number 08562-60021) contains service tools required to repair the instrument. Refer to Table l-2 for a list of items in the service kit. Table l-2. Service Kit Contents Description Cable Puller PC Board Prop Line Filter Assembly Line Switch Cabl...

B u i l d i n g G r o u n d i s t C o r d I- I I Figure l-l. Example of a Static-Safe Workstation The suggestions that follow may help reduce ESD damage that occurs during instrument testing and servicing. n Before connecting any coaxial cable to an spectrum analyzer connector for the first time eac...

Table 1-3. Static-Safe Accessories Description 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.) Wrist-strap cord, 1.5 m (5 ft). 9300-1383 Wrist-strap, color black,...

Spectrum analyzer damage can result from using packaging materials other than those specified. Never use styrene pellets in any shape as packagingmaterials. They do not adequately cushion the equipment or prevent it from shifting in the carton. They cause equipment damage by generating static electr...

Recommended Test Equipment Table l-4 lists the recommended test equipment required for operation verification, performance tests, adjustments, troubleshooting, and the Test and Adjustment Module. Anyequipment that meets the critical specifications given in the table can be substituted for the recomm...

Table 1-4. Recommended Test Equipment (continued) Instrument Counters Frequency standard Critical Specifications for Equipment Substitution Output frequency: 10 MHz Accuracy: x Recommended Use Model HP 5061B Microwave frequency counter Universal counter Frequency range: 9 MHz to 7 HP 5343A OR Extern...

Table 1-4. Recommended Test Equipment (continued) Instrument Equipment Critical Specifications for Equipment Substitution Required to run operation verification software. No substitute. Recommended Use Model HP V HP H P 3 1 0 , 3 2 0 H P 3 3 2 , 3 6 0 Bandwidth (3 dc to 100 MHz Two channels Minimum ...

Table 1-4. Recommended Test Equipment (continued) Low-pass filter 1 I I I C C C C Cutoff frequency: 50 MHz Rejection at 65 MHz: Rejection at 75 MHz: 0955-0306 filter ( t w o r e q u i r e d ) Cutoff frequency: 1.8 Rejection at 0.1 ripple 0955-0491 filter ( t w o r e q u i r e d ) Cutoff frequency: 4...

Table 1-4. Recommended Test Equipment (continued) I n s t r u m e n t Cable, HP-IB ( e i g h t r e q u i r e d ) A d a p t e r s Adapter Adapter ( t h r e e r e q u i r e d ) Adapter Adapter Adapter Adapter ( t w o r e q u i r e d ) Adapter Adapter Adapter 4dapter ( t w o r e q u i r e d ) 4dapter (...

Sales and Service Offices Hewlett-Packard has sales and service offices around the world providing complete support for Hewlett-Packard products. To obtain servicing information, or to order replacement parts, contact the nearest Hewlett-Packard Sales and Service Office listed in Table l-5. In any c...

Table 1-5. Hewlett-Packard Sales and Service Offices US FIELD OPERATIONS Headquarters California, Northern Hewlett-Packard Co. Hewlett-Packard Co. 19320 Pruneridge Avenue 301 E. Evelyn Cupertino, CA 95014 Mountain View, CA 94041 (800) 752-0900 (415) 694-2000 California, Southern Hewlett-Packard Co. ...

2 Adjustment Procedures Introduction This chapter contains information on automated and manual adjustment procedures. Performthe automated procedures using the HP 85629B test and adjustment module (TAM). Never perform adjustments as routine maintenance. Adjustments should be performed after a repair...

Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operation and to prevent damage to the instrument. Service and adjustments should beperformed only by qualified...

For adjustments requiring a nonmetallic tuning tool, use fiber tuning tool, HP part number Two different tuning tools may be necessary for IF adjustments, depending upon the type of tuning slug used in the slug-tuned inductors. If the tuning slug requires a slottedtuning tool, use HP part number 871...

Assembly Changed or Repaired keyboard R P G A2 controller A3 interface A4 log osc A5 IF A6 power supply HV module A7 switched LO distribution Table 2-1. Related Adjustments Perform the following related adjustments in the order listed related adjustment related adjustment 16 MHz PLL adjustment Displ...

Table 2-1. Related Adjustments (continued) Assembly Changed or Repaired A8 low band mixer A9 input attenuator A10 RYTHM A l l Y T O Al3 2nd converter Al4 frequency control Al5 RF sampler Al7 CRT driver CRT A19 HP-IB A21 OCXO Perform the following related adjustments in the order listed Frequency res...

Table 2-2. Adjustable Components Reference Designator Adjustment Name 16 MHz PLL ADJ 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 CAL OSC AMPTD LC CTR 1 LC CTR 2 LC CTR 3 LC CTR 4 ...

Table 2-2. Adjustable Components (continued) Reference Designator Adjustment Adjustment Name Number XTAL CTR 3 3 XTAL CTR 4 3 HV ADJ 1 6.01 7 FM SPAN 7 3.2 7 SMPL MATCH 6 VCO RANGE 6 v c x o 18 T R I P L E R 18 10 MHz ADJ 12 CAL AMPTD EXT BIAS ZERO GAIN C U T O F F Z FOCUS X FOCUS COARSE FOCUS X GAI...

Using the TAM The HP 85629B TAM, in conjunction with the HP Interface Software (TAM I/F SW), can be used to perform approximately half of the spectrum analyzer adjustment procedures. Table 2-4 lists the TAM adjustments and their corresponding manualadjustments. Refer to Chapter 7, “General Troublesh...

Table 2-4. TAM Adjustments TAM Adjustment 1. IF bandpass, LC poles 2. IF bandpass, crystal poles 3. IF amplitude 4. Limiter phase 5. Linear fidelity 6. Log fidelity 7. Sampling oscillator 8. YTO 9. LO distribution amplifier 10. Low band flatness* 11. High band flatness and YTF* 12. Calibrator amplit...

Front End Cal (adjustment) This procedure automates two manual procedures: Frequency Response Adjustment, and YIG-Tuned Filter/Mixer (RYTHM) Adjustment. This procedure is described in Chapter 3, “Frequency Response Adjustment Software.” 2-12 Adjustment Procedures

1. High Voltage Power Supply Adjustment 1. High Voltage Power Supply Adjustment A6 power supply There is no related performance test for this adjustment. The high voltage power supply is adjusted to the voltage marked on the HV module. The HV module is characterized in the factory to ensure that the...

1. High Voltage Power Supply Adjustment Digital multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 34118A After disconnecting the ac power...

2. Display Adjustment 2. Display Adjustment A2 controllerAl7 CRT driver Sweep Time Accuracy (Sweep Times ms) Coarse adjustment of the deflection amplifiers, Z-axis amplifiers, and line generators is done using the CRT adjust pattern. Fine adjustments use the graticule. The fast zero-spanamplitude ad...

2. Display Adjustment Press then set the to -70 and the LOG to 1. This should almost completely fill the screen with the noise floor. Press Adjust GAIN until the intensity at the center of the screen is about medium. It should be fully illuminated, but not so bright that it burns the screen (15 on a...

2. Display Adjustment D G T L Y START BLANK STOP BLANK V I D E O G A I N D G T L Y G A I N Figure 2-4. A2 Display Adjustment Locations S K 1 4 22. Set SWEEP OFFSET, VIDEO OFFSET, and SWEEP GAIN to midrange. Adjustment locations are shown in Figure 2-4 for these A2 adjustments. 23. Set the HP 355D to...

2. Display Adjustment 25. Press M A R K E R LYL. If the marker is not at the top graticule, press MARKER-, REF again. Press (SAVE), SAVE STATE STATE 0. 27. Set the sweep time to 10 ms. 28. Press SAVE STATE STATE 29. Adjust SWEEP OFFSET to place the beginning of the trace at the leftmost vertical gra...

3. IF Adjustment 3. IF Adjustment A5 IF assembly Resolution bandwidth accuracy and selectivity 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). The inductors and transformers are for...

3. IF Adjustment 1. Turn the spectrum analyzer off by pressing Disconnect the power cord. Remove the spectrum analyzer cover and fold down the A2 controller, A3 interface, A4 log amp, andA5 IF assemblies. Reconnect the power cord. Turn the spectrum analyzer on and allow itto warm up for at least 30 ...

3. IF Adjustment 11. Move the positive DVM test lead to (this is a resistor-lead type of test point). 12. Adjust LC CTR 4 using the procedure in steps 4 through 6. Table 2-6. Factory-Selected LC Filter Capacitors CTR Adjustment Fixed Factory Select Capacitor LC CTR 1 LC CTR 2 LC CTR 3 LC CTR 4 Table...

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

3. IF Adjustment Table 2-10. Capacitor Part Numbers 8.2 1 0 1 2 15 18 2 0 2 2 2 4 2 7 HP Part Number 0160-4793 0160-4792 0160-4791 0160-4790 0160-4789 0160-4788 0160-5699 0160-4787 0160-5903 0160-4786 Adjustment Procedures 2-25

4. IF Amplitude Adjustments The IF amplitude adjustments consist of the cal oscillator amplitude adjustment and the reference 15 attenuator adjustment. A4 log oscillator A5 IF assembly IF Gain Uncertainty Scale Fidelity This adjustment sets the output amplitude of the A4 log oscillator and the absol...

4. IF Amplitude Adjustments Frequency synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapters Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476 Cables . . . . . . . . . ....

4. IF Amplitude Adjustments 3. Set the spectrum analyzer controls as follows: Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.7 MHz Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

4. IF Amplitude Adjustments 18. Note the AMKR amplitude. Ideally, it should read 50.00 fO.l 19. If the AMKR amplitude is less than 49.9 rotate 15 one-half turn counterclockwise for each 0.1 below 50.00 If the AMKR amplitude is greater than 50.1 rotate 15 one-half turn clockwise for each 0.1 above 50...

5. DC Log Amplifier Adjustments There are three DC log adjustments; limiter phase, linear fidelity, and log fidelity. A4 log oscillator IF Gain Uncertainty Scale Fidelity These three adjustment need only be done under the following conditions: Limiter phase Only if a repair is made to blocks F, G, H...

5. DC Log Amplifier Adjustments Frequency synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapters Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476 Cables . . . . . . . ....

5. 3. 4. 5. 6. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Log Amplifier Adjustments Set the spectrum analyzer controls as follows: Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

5. DC Log Amplifier Adjustments 11. Repeat steps 5 through 10. 1. Press (LINE) to turn the spectrum analyzer off. Remove the spectrum analyzer cover and place the spectrum analyzer in the service position as illustrated in Figure 2-9. See Figure 2-10 for adjustment location. 2. Connect the HP 3335 5...

6. Sampling Oscillator Adjustment Al5 RF assembly There is no related performance test for this adjustment procedure. The sampling oscillator tank circuit is adjusted for a tuning voltage of 5.05 Vdc when thesampling oscillator is set to 297.222 MHz. The voltage monitored is actually the tuningvolta...

6. Sampling Oscillator Adjustment 2. Press (PRESET) on the spectrum analyzer and set the controls as follows: Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

7. YTO Adjustment 7. YTO Adjustment Assembly Adjusted Al4 frequency control assembly Frequency Span Accuracy Frequency Readout Accuracy and Frequency Count Marker Accuracy The YTO main coil adjustments are made with the phase-lock loops disabled. The YTO endpoints are adjusted to bring these points ...

7. YTO Adjustment This adjustment cannot be performed if preselected external mixer mode isselected. The ON OFF function must be OFF. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Press (LINE) to turn the spectrum analyzer off. Remove the spectrum analyzer cover and fold down the Al5 RF and Al4 frequency control a...

A l 4 R 9 3 J 2 3 7. YTO Adjustment R 4 2 R 7 6 Figure 2-14. YTO Adjustment Locations 11. Place the jumper on in the NORM position (pins 1 and 2 jumpered). 12. Disconnect the SMA cable from the first LO OUTPUT jack and reconnect the termination on the first LO OUTPUT. 13. On the spectrum analyzer, p...

8. LO Distribution Amplifier Adjustment Al4 frequency control assembly First LO OUTPUT Amplitude The gate bias and SENSE voltages for the A7 switched LO distribution amplifier is adjusted to the value specified on the label of A7. MEASURING RECEIVER MEASURING RECEIVER SPECTRUM SPECTRUM ANALYZER POWE...

8. LO Distribution Amplifier Adjustment 1. Set the HP 85623 (LINE) switch to off and disconnect the line cord. Remove the cover and fold down the Al5 RF and Al4 Frequency Control assemblies. 2. Move the jumper on from the WR PROT to the WR position. The jumper is on the edge of the A2 board assembly...

8. LO Distribution Amplifier Adjustment 15. On the HP 85623, press MORE 2, SERVICE CAL DATA, LO LEVELS, and INT LEVEL. The message DRIVE FOR 1 will be displayed. 16. Note the INT Sense” voltage printed on the A7 LO distribution amp label. Use the knob or keypad, and press enter, to change the displa...

9. Frequency Response Adjustment 9. Frequency Response Adjustment Al5 RF assembly Displayed Average Noise LevelFrequency Response A signal of the same known amplitude is applied to the spectrum analyzer at several different frequencies. At each frequency, the DAC controlling the flatness compensatio...

9. Frequency Response Adjustment BNC CABLE SYNTHES I S W E E P E R : N C Y E X T R F OUTPUT ADAPTER RECE I I R E F POWER SPLITTER ADAPTER Figure 2-17. Frequency Response Adjustment Setup Synthesized sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP Meas...

9. Frequency Response Adjustment The YIG-tuned filter/mixer slope and offset adjustment must be correct beforethe high band part of the frequency response adjustment can be done. 1. Connect the equipment as shown in Figure 2-17. Do not connect the HP 8482A power sensor to the HP 11667B power splitte...

9. Adjustment 14. Add 67 to the 10 MHz RF gain DAC value and record as the 2 MHz RF gain DAC value. 2 MHz RF gain DAC value 15. Add 62 to the 10 MHz RF gain DAC value and record as the 6 MHz RF gain DAC value. 6 MHz RF gain DAC value 16. Press until 2 MHz is displayed in the active function block. U...

10. Calibrator Amplitude Adjustment 10. Calibrator Amplitude Adjustment Al5 RF assembly Calibrator Amplitude and Frequency Accuracy The CAL OUTPUT amplitude is adjusted for -10.00 measured directly at the front panel CAL OUTPUT connector. Figure 2-18. Calibrator Amplitude Adjustment Setup P C BOARD ...

11. 10 MHz Reference Adjustment-OCXO (Non-Option 103) A21 OCXO assembly 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 generally notreco...

11. 10 MHz Reference Adjustment-OCXO (Non-Option 103) SPECTRUM ANALYZER FREQUENCY STANDARD BNC CABLE BNC CABLE BOTTOM-SIDE VIEW F R E Q OF MAIN DECK ADJ c l Figure 2-19. 10 MHz Reference Adjustment Setup and Adjustment Location S K 1 2 0 Frequency counter . . . . . . . . . . . . . . . . . . . . . . ...

12. 10 MHz Reference Adjustment-TCXO (Option 103) 12. 10 MHz Reference Adjustment-TCXO (Option 103) Al5 RF assembly 10 MHz Reference Output Accuracy (Option 103) The frequency counter is connected to the analyzer CAL OUTPUT. The CAL OUTPUT is locked to the 10 MHz frequency reference which yields bet...

12. 10 MHz Reference Adjustment-TCXO (Option 103) Allow the spectrum analyzer to warm up for at least 30 minutes beforeperforming this adjustment. 1. Connect the equipment as shown in Figure 2-20. Prop up the Al4 frequency control assembly. 2. Set the frequency counter controls as follows: Sample ra...

13. Demodulator Adjustment 13. Demodulator Adjustment A4 log amplifier/Cal oscillator assembly There is no related performance test for this adjustment. A 5 peak-deviation FM signal is applied to the INPUT The detected audio is monitored by an oscilloscope. FM DEMOD is adjusted to peak the response ...

13. Demodulator Adjustment Cables ( 4 8 i n ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A Oscilloscope probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . HP 10432A 1. Press (LINE) to turn the spectrum ...

13. Demodulator Adjustment 8. A 1 sine wave should be observed on the oscilloscope. Rotate the volume knob on the front panel of the spectrum analyzer until the amplitude of the 1 signal is at about 150 (3 divisions on the oscilloscope). 9. Adjust FM DEMOD for a maximum peak-to-peak response on the ...

14. External Mixer Bias Adjustment (Non-Option 327) Al5 RF assembly There is no related performance test for this adjustment. A voltmeter is connected to the spectrum analyzer IF INPUT with the external mixer bias setto off. The bias is adjusted for a 0 Vdc output. DVM . . . . . DIGITAL VOLTMETER Al...

15. External Mixer Amplitude Adjustment (Non-Option 327) 15. External Mixer Amplitude Adjustment (Non-Option 327) Al5 RF assembly IF Input Amplitude Accuracy The slope of the flatness compensation amplifiers is determined. The user-loaded conversion losses for K-band are recorded and reset to 30 A 3...

15. External Mixer Amplitude Adjustment (Non-Option 327) Synthesized sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP Measuring receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8902A Power sensor ....

8. 9. 10. 11. 12. 13. 14. 15. 15. External Mixer Amplitude Adjustment (Non-Option 327) Table 2-12. Conversion Loss Data Frequency 18 20 22 Conversion Loss 24 26 27 Connect the HP 8481D to the HP 11708A attenuator already connected to the HP 8902A RF power connector. Zero and calibrate the HP 8481D c...

15. External Mixer Amplitude Adjustment (Non-Option 327) 16. YIG-Tuned Filter/Mixer (RYTHM) Adjustment Al4 frequency control assembly Image, Multiple, and Out-of-Band Responses Second Harmonic Distortion Frequency Response The slope and offset of the A10 RYTHM tuning voltage are set by on the Al4 fr...

16. YIG-Tuned Filter/Mixer (RYTHM) Adjustment 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Set the HP 85623 switch to off and disconnect the line cord. Remove the spectrum analyzer cover, fold down the Al4 and Al5 board assemblies, and connect the line cord. Connect the equipment as illustrated in Fig...

16. YIG-Tuned Filter/Mixer (RYTHM) Adjustment Press MENU, STORE DATA , and YES. 15. Place the WR PROT/WR jumper on the A2 controller assembly in the WR PROT position. 16. On the HP 85623, press MORE OF 2, FACTORY PRSEL , then SAVE PRESEL PK. 2-62 Adjustment Procedures

17. 16 MHz PLL Adjustment 17. 16 MHz PLL Adjustment A2 controller assembly Sweep Time AccuracyGate Delay Accuracy and Gate Length Accuracy Delayed Sweep AccuracyFast Sweep Time Accuracy (Option 007) The 16 MHz CPU clock is phase locked to the 10 MHz reference. The output of the 16 MHz PLL loop integ...

17. 16 MHz PLL Adjustment 1. Press to turn the spectrum analyzer off. Remove the spectrum analyzer cover and fold out the A2 controller and A3 interface assemblies. Use a pc board prop to hold upthe A3 interface assembly, as shown in Figure 2-26. 2. Connect the equipment as shown if Figure 2-26. The...

17. 16 MHz PLL Adjustment 8. Adjust (16 MHz PLL ADJ) until the microwave frequency counter reads 14.4 MHz KHz. 9. Reconnect W22 to The microwave frequency counter should read 16 MHz. If the counter reads 16 MHz and the display is still distorted, perform the display adjustments in “Display Adjustmen...

18. 600 MHz Reference Adjustment Al5 RF assembly There is no related performance test for this adjustment. The 100 MHz VCXO and the tripler are adjusted for a maximum signal level at 600 MHz. A spectrum analyzer is used to monitor the amplitude of the 600 MHz signal while performingthese adjustments...

3 Frequency Response Adjustment Software This chapter describes how to load and run the frequency response adjustment software, included with every HP 85623 Option 915 (add Service Documentation). This software actually automates two manual adjustments: Frequency Response Adjustment, and YIG-Tuned F...

Getting Started First, make sure you have a compatible controller (computer), and the proper test equipment. The following paragraphs describe requirements for controllers and test equipment. Once the proper equipment is identified, proceed to “Equipment Connections.” The HP 85623 Frequency Response...

Table 3-l summarizes the equipment required to run the Frequency Response Adjustment procedure. The adjustment can use various model numbers of a particular equipment type.Information about selecting the equipment model number you want to use is provided in “Setting HP-IB Addresses” in this chapter ...

Computer (Controller) Setup For HP 9000 model 216 or model 236 computers, setup instructions are provided in Chapter 1, “Computer Installation,” of the BASIC Operating Manual. For HP 9000 model 310 computers, setup information is provided in Configuration Reference for Series 300 computers. HP-IB Ca...

Using Frequency Response Adjustment Software Load HP BASIC into the computer. HP BASIC choices are: n BASIC 2.0 and extensions 2.1 BASIC 3.0 or 4.0, which must include the following binaries: MAT IO G R A P H G R A P H X P D E V HPIBMSCLOCK DISCK B D For configuration instructions, refer to the BASI...

The first menu screen displayed is the Conditions Menu. The pointer displayed along the left edge of the screen may be moved with the knob (if one is present) or the up and down arrow keys. Notice that the menu has two pages. Moving the pointer below the last entry onthe page brings up the next page...

To select a particular sensor of a certain model number, move the pointer to the desired model number and press Entry. Enter the last five digits of the power sensor serial number (that is, the serial number suffix). The program checks to see that a data file containing the cal factor data for that ...

CONDITIONS files used with the operation verification software for either the HP 8560 A/B-S eries spectrum analyzers, or the HP 8560 E-Series spectrumanalyzers are not compatible with the frequency response adjustment software. If the software is stored on an HFS-formatted hard drive, the frequencyr...

To run this program in a dual-bus configuration, enter equipment addresses as described in “Setting HP-IB Addresses” above, making sure that each address properly identifies the bus select code to which it is connected. Program operation is the same for dual-bus andsingle-bus configuration. The freq...

Single Test Press Single Test to run the adjustment indicated by the pointer. Once the adjustment is running, press Restart to abort and restart the test. Calibrate Power Sensor The frequency response adjustment program keeps track of which power sensor is being used and the elapsed time since it wa...

Frequency Response Adjustment Menu This section provides a brief description of each menu of softkeys. More detailed information is provided in “Program Operation” in this chapter. The order shown below may vary with what appears on the computer display; the order differs depending on whether an HP ...

Single Test Cal Sensor List Equip Menu runs the adjustment indicated by the pointer, once. allows you to recalibrate the current power sensor and resets the internal “time-since-last-calibration” timer. lists the required equipment for the test indicated by the pointer. returns to the Conditions Men...

Front End Cal (YIG-Tuned Filter/Mixer (RYTHM) and Frequency Response Adjustment) BNC CABLE ADAPTER Figure 3-1. Front End Cal Adjustment Setup REF Frequency Response Adjustment Software 3-15

Frequency Response Adjustment Error Messages The frequency response adjustment software displays prompts and error messages on thecomputer display. Error messages are preceded with ERROR:. For more information onprompts, refer to “Program Operation” in this chapter. The following error messages are ...

4 Assembly Replacement This chapter describes the removal and replacement of all major assemblies. The following replacement procedures are provided: Access to Internal Assemblies Cable Color Code Procedure 1. Spectrum Analyzer CoverProcedure 2. Al Front Frame/Al8 CRTProcedure 3. Keyboard/Front Pane...

Access to Internal Assemblies Servicing the HP 85623 requires the removal of the spectrum analyzer cover assembly and folding down six board assemblies. Four of these assemblies lay flat along the top of the spectrum analyzer and two lay flat along the bottom of the spectrum analyzer. All sixassembl...

Cable Color Code Coaxial cables and wires will be identified in the procedures by reference designation or name followed by a color code. The code is identical to the resistor color code. The first number indicates the base color with second and third numbers indicating any colored stripes. For exam...

Procedure Spectrum Analyzer Cover 1. Disconnect the line-power cord, remove any adapters from the front panel connectors, and place the spectrum analyzer on its front panel. 2. If an HP 85620A Mass Memory Module or HP 85629B Test and Adjustment Module is mounted on the rear panel, remove it. Loosen ...

Procedure 2. Al Front Frame/Al8 CRT Procedure 2. Al Front Frame/Al8 CRT The voltage potential at is Disconnect at the CRT with Failure to properly discharge may result in severe electrical shock to personnel and damage to the instrument. 1. Remove the spectrum analyzer cover assembly as described in...

Procedure 2. Al Front Frame/Al8 CRT 15. Place the spectrum analyzer on its right side frame with the front frame assembly hanging over the front edge of the workbench. 16. Fold out the Al4 and Al5 assemblies as described in steps 3 and 4 under “Procedure 9. Al4 and Al5 Assemblies Removal.” 4-8 Assem...

Procedure 2. Al Front Frame/Al8 CRT The voltage potential at is Failure to discharge correctly may result in severe electrical shock to personnel and damage to the instrument. CONDUCTIVE SHAFT \ CL I P LEAD INSULATEDHANDLE Figure 4-2. Discharging High Voltage on the CRT Assembly Replacement 4-7

Procedure 2. Al Front Frame/Al8 CRT (4 PLACES) 1 2 ENEATH CABLES) 12e Figure 4-3. A18, and Line-Switch Assembly Mounting Screws 17. Remove screw (2) securing the A9 input attenuator assembly to the center support on the front frame. See Figure 4-3. 18. Use a open-end wrench to disconnect W41 from th...

Procedure 2. Al Front Frame/Al8 CRT connectors and cover the tip with heatshrink tubing or tape to avoid scratching the enameled front panel. 23. Loosen screw (3) securing the line-switch assembly to the front frame. This is a captive screw and cannot be removed from the line-switch assembly. See Fi...

Procedure 2. Al Front Frame/Al8 CRT 1 n Figure 4-5. Installing the CRT and front frame Assemblies 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 the side of the ...

Procedure 2. Al Front Frame/Al8 CRT 15. 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 W41 and the attenuator bracket. Secure the A9 input attenuator bracket to the center support on the front frame using one sc...

Procedure 3. Keyboard/Front Panel Keys Procedure 3. Al Al Keyboard/Front Panel Keys 1. Remove the front frame from the spectrum analyzer as described in “Procedure 2. Al Front Frame/Al8 CRT.” 2. Place the front frame face-down on the bench and remove the front frame center support. 3. Disconnect fro...

Procedure 4. RPG 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 shaft to the...

Procedure 5. A2, A3, A4, and A5 Assemblies SK129 Figure 4-7. A2, A3, A4, and A5 Assembly Removal 1. Place the spectrum analyzer on its right side 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 ...

Procedure 6. A6 Power Supply Assembly Procedure 6. A6 Power Supply Assembly 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 beginni...

Procedure 6. A6 Power Supply Assembly 1 0 0 0 r w 3 F A NP O W E R C A B L ET I E TORX SCREW L I N EP O W E R WI TORX SCREWS Figure 1. A6 Power Supply Connections Assembly Replacement 4-23

Procedure 7. High Voltage Assembly Procedure 7. High Voltage Assembly 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 thi...

Procedure 7. High Voltage Assembly 15. Remove the three screws securing the high voltage assembly to the A6 power supply assembly. 16. Disconnect ribbon cable from See Figure 4-11. 17. For Option 007 spectrum analyzers: Remove the two screws (1) securing two board-mounting posts to the left side fra...

Procedure 7. High Voltage Assembly 7. Place the Al7 CRT Driver assembly into the center-deck mounting slot nearest the CRT. Use caution when routing cables to avoid damage. 8. For Option 007 spectrum analyzers: Place the Al6 FADC assembly into the center-deck mounting slot nearest the left side fram...

Procedure 8. A7 through Al3 Assemblies A separate replacement procedure is supplied for each assembly listed below. Before beginninga procedure, do the following: n Fold out the Al4 and Al5 assemblies as described in “Procedure 9. Al4 and Al5 Assemblies.” n If the All YTO or A10 assembly (SYTF or RY...

A7 First LO Distribution Amplifier 1. Remove the two screws securing the assembly to the spectrum analyzer center deck. 2. Use a wrench to disconnect W38 and W39 at and 3. Disconnect W46 at 4. Disconnect W42 at the front panel First LO OUTPUT connector. Loosen W42 at 5. Remove W12 from the A7 assemb...

A8 Low Band Mixer A8 Low Band Mixer 1. Place the spectrum analyzer upside-down on the work bench with Al4 and Al5 folded out to the left. 2. Use a wrench to remove W45 from FL1 and 3. Loosen W56 and W39 at and 4. Remove the two screws securing A8 to the center deck. 5. Remove W56 and W39 from the A8...

A9 Input Attenuator 1. Place the spectrum analyzer upside-down on the work bench. 2. Remove W41 and W43. 3. Disconnect W34 from A7 and move this cable out of the way. 4. Remove screw (1) securing the attenuator to the front frame center support. See Figure 4-14. 5. Remove screw (1) securing the A9 i...

A10 YIG-Tuned Filter/Mixer Do NOT remove the brackets from the A10 assembly. If these brackets areremoved and reinstalled, the performance of A10 will be altered. A new or rebuilt A10 assembly includes new mounting brackets already attached to it. 1. 2 . 3 . 4. Disconnect W16 ribbon cable from the A...

All YTO All YTO 1. Disconnect W16 ribbon cable from the A10 assembly and move it out of the way. 2. Remove ( as a unit) and disconnect W38 at the All assembly. 3. Remove four screws (1) securing All to the right side frame. See Figure 4-17. Remove the screws while holding onto All. 4. Disconnect rib...

Al3 Second Converter Turn off the spectrum analyzer power when replacing the Al3 secondconverter assembly. Failure to turn off the power may result in damage to theassembly. 1. Place the spectrum analyzer upside-down on the work bench. 2. Disconnect W33, coax 81, and W35, coax 92, from the Al3 assem...

Procedure 9. Al4 and A15 Assemblies Procedure 9. Al4 and Al5 Assemblies 1. Remove the spectrum analyzer cover as described in “Procedure 1. Spectrum Analyzer Cover.” 2. Place the spectrum analyzer on its right side frame. 3. Remove the eight screws (1) holding the Al4 and Al5 assemblies to the botto...

Procedure 9. Al4 and Al5 Assemblies W I w 2 0 0 5 ) A 1 4 ’ w 3 7 ’ W I w 2 w 2 2 w 3 1w 3 7 N O T 0 0 0 0 0 . A l COMPONENT q W I 0 w 3 4 W I 2 WI 1 A l 5 W32 0 0 1 ) w 3 5 W 3 6 A l 5 W 3 2 14e Figure 4-19. Al4 and Al5 Assembly Cables Assembly Replacement 4-39

Procedure 10. Al6 Fast ADC and Al7 CRT Driver 1. Remove the spectrum analyzer cover assembly and fold out the A2, A3, A4, and A5 assemblies as described in steps 3 through 6 under “Procedure 5. A2, A3, A4, and A5 Assemblies Removal.” 2. Place the spectrum analyzer top-side-up on the work bench with ...

Procedure 10. Al6 Fast ADC and Al7 CRT Driver 1. Connect W7, and to the Al7 CRT driver assembly. Place the assembly into the center-deck mounting slot next to the CRT assembly. 2. For Option spectrum analyzers: Connect all Al6 assembly cables as illustrated in Figure 4-21 which shows the left side f...

Procedure 11. Fan 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 rear frame. 2. Remove the f...

Procedure 12. Battery Procedure 12. Battery Battery contains lithium polycarbon monofluoride. Do not incinerate or puncture this battery. Dispose of discharged battery in a safe manner. To avoid loss of the calibration constants stored on the A2 controller assembly, connect the spectrum analyzer to ...

Procedure 13. Rear Frame/Rear Dress Panel 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 beforebeginning this replacement procedure. Fail...

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 13. Rear Frame/Rear Dress Panel 4. Place the coax cable BNC connectors into the appropriate rear frame holes as described below. Use a nut driver to attach the dress nuts holding the BNC connectors to the rear frame. Rear Panel Jack RF Cable W24, coax 5 W23, coax 93 W25, coax 4 coax 97 W31...

Procedure 14. W3 Line Switch Cable Due to possible contact with high voltages, disconnect the spectrum analyzerline-power cord before performing this procedure. 1. Remove the spectrum analyzer cover assembly as described in “Procedure 1. Spectrum Analyzer Cover 2. Fold out the A2, A3, A4, and A5 ass...

Procedure 14. W3 Line Switch Cable 17. 18. Fold out the Al4 and Al5 assemblies as described in “Procedure 9. Al4 and Al5Assemblies Removal,” steps 3 and 4. Loosen the screw (1) securing W3, the line switch assembly, to the front frame. The screw is captive. See Figure 4-25. 1 Figure 4-24. W3 Dress a...

Procedure 14. W3 Line Switch Cable 20. With wire cutters, clip the tie wrap holding the cable to the contact housing, From the top side of the spectrum analyzer, use contact removal tool, HP Part Number 8710-1791, to remove the four wires from the W3 connector. See Figure 4-26. 21. Completely remove...

Procedure 14. W3 Line Switch Cable S T A N D O F F 13e Figure 4-25. Line-Switch Mounting Screw and Cable Dress Assembly Replacement 4-5 1

Procedure 14. W3 Line Switch Cable 3. From the bottom side of the spectrum analyzer, insert the contact end of W3 through the slotted opening in the main deck. W3 should come through to the top side of thespectrum analyzer between the Al8 CRT assembly and the post-accelerator cable. 4. Place LED int...

Procedure 15. EEROM Procedure 15. EEROM The EEROM is replaced with the power on. Use a nonmetallic tool to remove the defective EEROM and install the new EEROM. 1. Turn the HP 85623 switch off. Remove the spectrum analyzer cover assembly and fold out the A2, A3, A4, and A5 assemblies as described in...

Procedure 16. A21 OCXO 1. Remove the rear frame assembly as described in “Procedure 13. Rear Frame/Rear Dress Panel Removal,” steps 1 through 20. 2. Place the spectrum analyzer on its right side frame. 3. Fold out the Al4 and Al5 assemblies as described in “Procedure 9. Al4 and Al5 Assemblies Remova...

Procedure 16. A21 OCXO 1. Connect W49, coax 82, to the OCXO and position the OCXO in the spectrum analyzer. Dress orange cable, next to W49 through the opening in the deck. 2. Secure the OCXO to the spectrum analyzer main deck using three screws (1). See Figure 4-28. 3. Connect to Install tie wraps ...

5 Parts This chapter contains information on ordering all replaceable parts and assemblies. Locate the instrument parts in the following figures and tables: Table 5-l. Reference Designations, Abbreviations and MultipliersTable 5-2. Manufacturers Code List Table 5-3. Replaceable Parts Figure 5-l. Par...

Within the USA, a phone order system is available for regular and hotline replacement parts service. 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 standard time, Monday throu...

Table 5-1. Reference Designations, Abbreviations and Multipliers REFERENCE DESIGNATIONS A Assembly F Fuse R T Thermistor A T Attenuator, Isolator, F L Filter S Switch Limiter, Termination HY Circulator T Transformer B Fan, Motor J Electrical Connector TB Terminal Board B T B a t t e r y (Stationary ...

Table 5-1. Reference Designations, Abbreviations, and Multipliers (2 of 4) D A P - G L D i a l l y l P h t h a l a t e 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 - M O D E D e p l e t i o n M o d e D...

Table Reference Designations, Abbreviations, and Multipliers (3 of 4) ABBREVIATIONS N P L S T C P l a s t i c SMA Subminiature, P N L Panel A Type (Threader N Nano, None P N P Positive Negative Connector) N - C H A N N - C h a n n e l Positive (Transistor) SMB Subminiature, N H Nanohenry POLYC Polyc...

Table 5-1. Reference Designations, Abbreviations, and Multipliers (4 of 4) I U UCD Microcandela UF Microfarad U H Microhenry Microliter, Underwriters’ Laboratories, Inc. U N H D N D U n h a r d e n e d V W Watt, Wattage, White, Wide, Width W / S W W i t h S w i t c h w w Wire Wound X X By (Used with...

Table 5-3. Replaceable Parts Reference Designation 1250-0780 HP 10502A 8710-1755 5062-0800 5 1 5001-8739 7 5001-8740 0 5001-8742 2 5021-5807 6 5021-5808 7 5021-5836 1 0510-1148 2 0515-0886 3 0515-0887 4 0515-0889 6 0515-1241 6 0515-1331 5 5061-9679 2 0515-1114 2 8710-1755 9 5958-6573 0 2 2 2 2 2 5 1...

Table 5-3. Replaceable Parts (continued) Reference Designation A l HP Number 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 Description SCREW-MACH M3.5 x 0.6 SCREW-MACH M5 x 0.8 PAN-HD SCREW-METRIC SPECIALTY M4 x 0.7 THD; 7MM FRONT H...

Table 5-3. Replaceable Parts (continued) Reference HP Description Part Designation N u m b e r D Code Number 08562-60140 6 1 BD AY-KEYBOARD 28480 5062-8259 1 CABLE ASSEMBLY, RIBBON, 28480 5062-8259 KEYBOARD to 0960-0745 6 1 RPG ASSEMBLY (Includes Cable) 28480 0960-0745 8120-8153 1 CABLE ASSEMBLY PRO...

Table 5-3. Replaceable Parts (continued) Description FAST ADC ASSEMBLY 2848C 08563-60030 4 5041-3987 1 2090-0225 4 A 1 9 08562-60042 7 5061-9031 0 5062-7755 3 5063-0245 4 CRT DRIVER ASSEMBLY CRT ASSEMBLY (Order by Individual Parts) CRT WIRING ASSEM. (Includes Shield and SPACER, CRT TUBE, CRT 6.7 IN ...

Table 5-3. Replaceable Parts (continued) Reference Designation A4 Assembly A5 Assembly Assembly 415 Assembly HP Part Number 5063-0220 5063-0221 5063-0219 5063-0222 0515-1486 0515-2080 2190-0583 0905-0375 5021-6729 5021-6730 5021-6731 5021-6732 0515-2081 0905-0375 2190-0583 5063-0209 5063-0210 0515-0...

Table 5-3. 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 CABLE ASSEMBLY, SPEAKER CABLE ASSEMBLY, BATTERY to Rear Panel Battery Holder) CAB...

Table 5-3. Replaceable Parts (continued) Reference HP Part C Qty Description Mfr Part Designation Number D Code Number CABLE ASSEMBLIES (CONTINUED) W16 8120-5676 0 1 C A B L E ASSEMBLY, A10 RYTHM DRIVE 28480 8120-5676 to W18 5062-0721 8 1 C A B L E ASSEMBLY, COAX 97, LO SWEEP 28480 5062-0721 0.5 to ...

Table 5-3. Replaceable Parts (continued) Reference HP Part C Qty Description P a r t Designation Number D Code Number CABLE ASSEMBLIES (CONTINUED) W38 5022-0183 3 1 CABLE ASSEMBLY, SEMI-RIGID, LO 28480 (AllJ2 to w 3 9 5022-1081 1 CABLE ASSEMBLY, SEMI-RIGID, MIXER 28480 5022-108: LO to 5062-0724 2 1 ...

HP Part Number 0515-1349 0515-2310 0515-3208 0515-2332 0515-0664 T O P V I E W BOTTOM VIEW Figure Parts Identification, Assembly Mounting Description 11 SCREW-MACH M3 X PAN-HD TORX 3 SCREW-MACH M3 X PAN-HD TORX 2 SCREW-MACH M3 X PAN-HD TORX 13 SCREW-MACH M3 X PAN-HD TORX 2 SCREW-MACH M3 X PAN-HD TOR...

Parts List, Front Frame 5 6 7 8 8 8 9 10 1 1 1 2 13 14 1 5 1 6 17 1 8 1 9 2 0 HP c HP c D D 0 5 1 5 - 1 6 2 2 7 0 5 1 5 - 1 6 2 2 7 5 0 4 1 - 8 9 0 6 4 5 0 4 1 - 8 9 0 6 4 1 0 0 0 - 0 8 9 7 4 1 0 0 0 - 0 8 9 7 4 0 3 7 0 - 3 0 6 9 2 0 3 7 0 - 3 0 6 9 2 4 1 1 1 3 0 3 0 - 0 0 2 2 4 3 0 3 0 - 0 0 2 2 4 ...

Parts List, Front Frame (continued) Item 21 2 2 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 31 3 2 3 3 3 4 3 5 3 6 1990-1131 5041-1682 0900-0010 0515-0664 5021-5482 0515-1143 0515-1934 2100-4232 3050-0014 2190-0067 2950-0072 0370-3079 5021-9320 C D 2 9 1 9 0 9 2 5 3 7 4 1 1 1 2 1 1 1 1 1 1 2 9 Description N...

6 Major Assembly and Cable Locations Introduction This chapter identifies the instrument assemblies and cables and contains the following figures: Figure Hinged AssembliesFigure 6-2. Top View (A2 Unfolded)Figure 6-3. Top View (A2 and A3 Unfolded)Figure 6-4. Top View (A2, A3, A4, and A5 Unfolded)Figu...

General Troubleshooting Introduction This chapter provides information needed to troubleshoot your spectrum analyzer to one of the six major functional sections. Chapters 8 through 13 cover troubleshooting for eachof these sections. Before troubleshooting, read the rest of this introduction. To begi...

T E S T P O I N T S O N B L O C K I J 4 ( T E S T J T P 2 T P 3 P I N N U M B E R 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 Figure 7-1. Assembly Test Points SK163 General Troubleshooting 7-3

D GNDD GND W I P O W E R C A B L E A GND GND - 1 5 v U P C O N N E C T I O N S A GND - 1 5 v A SWEEP INPUT N C A GND N CN C . 5 0 4 9 . - 1 5 ” l 4 7 . POWER FOR . 4 6 4 5 . CONTROLLER . 4 4 43 l AND INTERFACE . 4 2 4 1 . ONLY . 1 - 1 5 v . INE T R I G . 5 . a . . 4 0 l l . 3 6 3 5 . GND . 3 4 3 3 ....

I 3 6 . I I D CND . 37 3 8 . O A O L I N T F C E S T B . 3 4 3 3 . DPKD CLK L I N T F C E S T B . 3 2 31 . A D C D GND . 3 0 2 9 . LKEY RPG IRG D GND . 2 7 . R E F D GND . 2 6 2 5 . CAL OSC TUNE D GND . 2 4 2 3 . H B A D C C L K 0 I A 9 2 2 21 . BKT PULSE . 2 0 19 . I N T E R F A C E S T E P . 17 . ...

The jumper on is shipped from the factory in the WR PROT (write protect) position (jumper on pins 2 and 3). When the jumper is set to the WR (write enable) position (jumper on pins 1 and an additional service cal data menu is displayed under [CAL). Figure 7-3 illustrates those areas of the service c...

C A L AMP GAIN EXT MXR REF CAL PREV MENU P R E S E L A D J k e y a n d t h e a s s o c i a t e d m e n u a p p l y t o t h e o n l y . BAND 1 MXR key applies to HP8561 E only. LO FREQ SAMPLER F R E O SAMPLER HARMONIC FRAC N POSTSCLR RAW OSC Figure 7-3. Service Cal Data Menu General Troubleshooting 7...

Troubleshooting to a Functional Section 1. Refer to Table 7-l for the location of troubleshooting information. 2. If the HP 85629B test and adjustment module (TAM) is available, refer to “The TAM (Test and Adjustment Module)” in this chapter. 3. If error messages are displayed, refer to “Error Messa...

Table 7-1. Location of Assembly Troubleshooting Text Instrument Location of Troubleshooting Text Assembly keyboard Chapter 8. ADC/Interface Section R P G Chapter 8. ADC/Interface Section A2 controller Chapter 10. Controller Section A3 interface Chapter 8. ADC/Interface Section Chapter 9. IF Section ...

n Use the (Mass Storage Is) command to make the flexible disk drive the mass storage device. For example, you would type : if the flexible disk was located at Type LOAD 1 and press or The program will run immediately after it is loaded. HP-IB addresses The program queries the spectrum analyzer for i...

n After the power-on self-realignments are complete, press PASS . This removes the computer as being the active controller on HP-IB, permitting the TAM to be the activecontroller. n The TAM functions are now available and are listed, along with any limitations. For example, if Automatic Fault Isolat...

The TAM uses a built-in dc voltmeter and DAC to measure voltages on any one of the “testconnectors” (or test jacks) located throughout the spectrum analyzer. Revision Connectors One test connector on each assembly is reserved as a “revision connector.” The TAM uses the revision connector to identify...

RF path fault isolation checks high-band RF paths. (Automatic fault isolation checks the low-band RF path.) An external microwave source with a frequency range of 5 to 13.2 is required. The source is not controlled over HP-IB. The user is prompted by the TAM to set the source to 5 at -10 (The TAM ex...

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...

3. Use the up and down step keys to scroll through any other error messages which might exist, making note of each error code. 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 ne...

120 NOP ON/OFF are not valid arguments for this command. 121 NOP ARG AUTO/MAN are not valid arguments for this command. 122 NOP TRC Trace registers are not valid for this command. 123 NOP ABLK A-block format not valid here. 124 NOP IBLK I-block format not valid here. 125 NOP STRNG Strings are not va...

202 FADC CAL 203 FADC CAL Binary search failed during FADC log offset calibration. This error applies only to spectrum analyzers with fast ADC(Option 007). 204 FADC CAL Binary search failed during FADC log expand offset calibration. This error applies only to spectrum analyzers with fast ADC (Option...

302 OFF UNLK 303 XFR UNLK 304 ROL UNLK 305 FREQ ACC 306 FREQ ACC Offset roller oscillator PLL is unlocked. May indicate loss of 10 MHz reference. The 10 MHz reference should measure greater than -7 at The ADC measures at the beginning of each sweep and, if the voltage is outside certain limits, the ...

307 ACC 308 ACC 309 ACC 310 ACC 311 ACC 312 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 pretune DAC until XFRSENSE changes p...

313 FREQ ACC 314 FREQ ACC 315 FREQ ACC 316 FREQ ACC Error in LO synthesis algorithm. ERR 313 is set if a combination ofsampler oscillator and roller oscillator frequencies could not be found to correspond to the required YTO start frequency. Contact the factory. This error is not applicable to HP 85...

317 ACC Main coil coarse DAC at limit. The main coil coarse DAC is set tobring YTO ERR close enough to 0 volts for the main coil fine DAC to bring YTO ERR to exactly 0 volts. ERR 317 is set if the main coil coarse DAC is set to one of its limits before bringing YTO ERR close enough to 0 volts. 318 A...

325 ACC 326 ACC 327 OFF UNLK 328 ACC 329 ACC Unable to adjust MAINSENSE to 0 volts using the fine adjust DAC. The coarse adjust and fine adjust DAC are used together to set MAINSENSE to 0 volts with the loop opened. ERR 32.5 is set if the fine adjust DAC cannot bring MAINSENSE to 0 volts. This error...

600 MHz Reference Loop (333) This error requires troubleshooting the Al5 RF board assembly(synthesizer section) or the ADC circuits. 333 600 UNLK The 600 MHz reference oscillator PLL is unlocked. If error codes 302,303, 304, 327 or 499 are also present, suspect the 10 MHz reference, the A21 OCXO, or...

YTO Loop Settling Errors (351 to 354) These errors are generated when the YTO loop error voltage will notstabilize at an acceptable value during the YTO loop locking routines.These errors only apply to the hardware in an HP 8560 E-Seriesspectrum analyzer. 351 SETL FLD YTO error voltage is not settli...

404 AMPL 405 RBW 406 RBW 407 RBW 408 RBW 409 RBW 410 RBW 411 RBW 412 RBW 413 RBW 414 RBW Unable to adjust amplitude of 10 resolution bandwidth. Errors 405 to 416: When these resolution bandwidth (RBW) error messages appear, use the following steps to check for errors 581or 582. 1. Press [LINE to tur...

415 RBW 416 RBW 417 RBW 3K 418 RBW 3K 419 RBW 3K 420 RBW 3K 421 RBW 422 RBW 423 RBW 424 RBW 425 RBW 3K 426 RBW 3K 427 RBW 3K 428 RBW 3K 429 RBW 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 ...

449 RBW 450 IF SYSTM 451 IF SYSTM 452 IF SYSTM 454 AMPL 455 AMPL 456 AMPL 457 AMPL 458 AMPL 459 AMPL 460 AMPL 461 AMPL 462 AMPL 463 AMPL 464 AMPL 465 AMPL 466 LIN AMPL 467 LOG AMPL 468 LOG AMPL 469 LOG AMPL 470 LOG AMPL 471 RBW 30K 472 RBW 473 RBW 300K 474 RBW 475 RBW 30K 476 RBW 477 RBW 300K 478 RB...

489 RBW 100 490 RBW 100 491 RBW 492 RBW 300 493 RBW 494 RBW 3K 495 RBW 496 RBW 100 497 RBW 100 498 RBW 100 499 CAL UNLK Unable to adjust 100 Hz resolution bandwidth. Unable to adjust 100 Hz resolution bandwidth. Unable to adjust the resolution bandwidths less than 300 Hz. Crystalsweep gain problem. ...

502 AMPL 503 AMPL 504 AMPL 30K 505 AMPL 506 AMPL 507 AMPL 508 AMPL 30K 509 AMPL .lM 510 AMPL 511 AMPL 512 RBW 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 Unable to adjust amplitude of 300 resolution bandwidth. Unable to ad...

526 RBW 527 RBW 528 RBW 529 RBW 530 RBW 531 RBW 532 RBW 533 RBW 534 RBW 535 RBW 536 RBW 537 RBW 538 RBW 539 RBW 540 RBW 550 ID CALOSC 551 ID LOGBD 552 LOG AMPL 553 LOG AMPL 554 LOG AMPL 555 LOG AMPL 556 LOG AMPL 557 LOG AMPL 558 LOG AMPL ADC timeout during IF ADJUST of Hz resolution bandwidth. Step ...

559 LOG AMPL 560 LOG AMPL 561 LOG AMPL 562 LOG AMPL 563 LOG AMPL 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 adj...

582 AMPL Unable to adjust 100 resolution bandwidth and resolution bandwidths less than or equal to 10 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 2. Press and set the controls as follows: Center ...

583 RBW 30K Unable to adjust 30 resolution bandwidth. 584 RBW Unable to adjust 100 resolution bandwidth. 585 RBW 300K Unable to adjust 300 resolution bandwidth. 586 RBW Unable to adjust 1 MHz resolution bandwidth. 587 RBW 30K Unable to adjust 30 resolution bandwidth. 588 RBW Unable to adjust 100 res...

RAM Check Errors (711 to 716) 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, all data in that RAM is destroyed. A separate error code is generated for each defective program RAM. All RAM is bat...

750 SYSTEM 751 SYSTEM These errors often require troubleshooting the A2 controller and A3 interface assemblies. Hardware/firmware interaction, zero divide. Check for other errors. Hardware/firmware interaction, floating point overflow. Check forother errors. 752 SYSTEM 753 SYSTEM 754 SYSTEM 755 SYST...

900 TG UNLVL 901 902 BAD NORM 903 A DLMT 904 B DLMT 905 EXT REF 9 0 6 907 DO IF CAL 908 9 0 9 9 1 0 These error codes indicate user-generated errors. Tracking generator output is unleveled. Tracking generator output unleveled because START FREQ is setbelow tracking generator frequency limit (300 The...

Block Diagram Description The spectrum analyzer is comprised of the six main sections listed below. See Figure 7-4. The following descriptions apply to the simplified block diagram and overall block diagram located at the end of this chapter. Assembly level block diagrams are located in Chapters 8 t...

Third Converter (part of A15) The third converter down-converts the 310.7 MHz IF to 10.7 MHz. A PIN-diode switch selects the LO signal used. For normal operation, a 300 MHz LO signal is used. The signal is derived from the 600 MHz reference PLL. During signal identification (SIG ID ON), the 298 MHz ...

The first LO uses four to phase-lock to the internal 10 MHz standard in the instrument. See Figure 7-5. The reference PLL supplies reference frequencies for the instrument. The three remaining tune and phase-lock the LO through its frequency range. To tune the LO to a particular frequency, the instr...

Offset Lock Loop (part of A15) The 285 MHz to 297.2 MHz sampling oscillator is used to sample the YTO. The frequencycan be changed by changing the programmable dividers of the offset lock loop. YTO PLL FRACTIONAL N LO OUTPUT 3.0 6.81 O F F S E T L O C K L O O P - , 300 MHz t , - R E F E R E N C E 60...

8 Section The ADC/Interface section includes the keyboard, RPG (rotary pulse generator), A3 interface, and Al6 fast ADC (Option 007) assemblies. Table 8-l lists signal versus pinnumbers for control cable W2. Troubleshooting Using the TAM Automatic Fault Isolation Keyboard/RPG Problems Keyboard Inter...

Trigger 16-Bit Post-Trigger Counter15-Bit (32 K) C Address Counter Video Trigger Comparator Table 6-1. W2 Control Cable Connections Signal D O D GND D 2 D 3 D 4 D GND D 5 D 6 D 7 D GND A l A2 A 3 A4 D GND A 5 A 6 A7 D GND L R F - S T B L F C - S T B CAL OSC TUNE L L O G - S T B VCMON D GND RT PULSE ...

Troubleshooting Using the TAM Refer to Chapter 7, “General Troubleshooting,” for information on enabling the TAM for use with the HP 85623 Spectrum Analyzer. When using Automatic Fault Isolation, the TAM indicates suspected circuits that need to bemanually checked. Use Table 8-2 to locate the manual...

Table 8-2. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Isolation Check ADC ASM Check ADC MUX Check ADC Start/Stop Control Check Analog Bus Drivers Check Analog Bus Timing Check Interface Strobe Select Check Keyboard Interface Check Negative Peak Detector Check Peak ...

Table 8-3. TAM Tests versus A3 Test Connectors Connector 105 Video Input to Interface Video to Rear Panel Video MUX LOG Offset/LOG Expand Video Filter Buffer Amp. Video Peak Detectors ADC MUX Variable Gain Amplifier Track and Hold Measured Signal Lines MS1 MS2 MS3 MS3 MS3, MS5, OS1 MS5, MS6 MS6 MS6,...

Problems Refer to function block G of A3 Interface Assembly Schematic Diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. A pressed key results in a low on a keyboard sense line (LKSNSO through LKSNS7). This sets the output of NAND gate high, generating The CPU determines ...

15. Press to turn spectrum analyzer off. 16. Reconnect to and remove jumpers. Table 8-5. Counter Frequencies pin # Nominal Frequency (Hz) 3 3900 4 1950 5 975 6 488 1 1 244 1 0 1 2 2 9 61 Triggering or Video Gating Problems Refer to function block H of A3 Interface Assembly Schematic Diagram in the H...

3. Check that the appropriate trigger MUX input signal is present at the trigger MUX output pin 7). 4. To check the video trigger level DAC, connect the positive lead of a DVM to pin 1 and the negative DVM lead to 5. Press (TRIG) and . 6. Press the STEP key several times while noting the DVM reading...

Preselector Peaking Control (Real Time DAC) Refer to function block H of A3 Interface Assembly Schematic Diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The spectrum analyzer uses a real-time DAC (R/T to peak the preselector. 1. Press (PRESET) on the spectrum analyzer ...

Flatness Control (RF Gain Refer to function block M of A3 Interface Assembly Schematic Diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. RF Gain control the Al5 assembly flatness compensation amplifiers. The RF Gain are arranged so that the output of one DAC is the volta...

A3 Assembly Video Circuits Voltages from to the A3 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 spec...

5. Refer to Table 8-7 and check for correct latched levels for the selected video bandwidth setting. 6. If the output of latch is not correct, trigger an oscilloscope on LLOG-STB pin 9) and monitor pin 1 and other latch inputs while changing the video bandwidth. 7. If the inputs are incorrect, troub...

Refer to function blocks Y and Z of A3 Interface Assembly Schematic Diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The following information pertains to the positive peak detector and is applicable to troubleshooting the negative peak detector. The positive peak detec...

7. If the peak detector appears latched up, check LPOS-RST (U422 pin 4) for a negative TTL level reset pulses. The reset pulses should occur every 130 and should be approximately 250 ns wide. 8. If the reset pulses are absent, troubleshoot the Peak Detector Reset circuitry. 9. If the reset pulses ar...

A3 Assembly ADC Circuits The ADC consists of a 12-bit DAC, 12-bit 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 ...

A3 Assembly Control Circuits A digital control problem will cause the following three steps to fail. 1. On the spectrum analyzer, press 7, 0, and 2. A click should be heard after pressing in step 1, unless was previously set to 70 3. Press 1, 0, and Another click should be heard. If no clicks were h...

Al6 Assembly Fast ADC Circuits (Option 007) The fast ADC consists of video signal scaling and limiting amplifiers, an 8-bit flash ADC, peak/pit detection of the digitized video signal, a 32 K-byte RAM, and the fast ADC control circuitry. Refer to function block L of the Al6 fast ADC assembly schemat...

Refer to function block J of the Al6 fast ADC assembly schematic diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. Peak detection or pit (negative peak) detection can be enabled whenever the sample rate is less than 12 MHz (sweep times greater than 50 Peak detection uses...

Al6 Assembly Fast ADC Control Circuits (Option 007) The fast ADC control circuits consist of the CPU interface and control registers, the reference clock, a clock and sample rate generator, a trigger circuit, a 16-bit post-trigger counter, a 15-bit circular address counter, a video trigger comparato...

Table 8-13. Control Word at Primary Address (U3 and U4) (continued) Bit Bit 10 Bit 11 LREADADDR Bit 12 LRATELATCH Bit 13 LRLSHSWP Bit 14 LLOADTRIG Bit 15 LPEAK Mnemonic LREADMEM State Description Enables read FADC memory. Read FADC memory disabled. Read FADC memory enabled. Enables read trigger addr...

Refer to function block E of the Al6 fast ADC assembly schematic diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The 16-bit post-trigger counter controls the number of static RAM memory locations that will be written after thetrigger occurs. This counter consists of U2...

Refer to function block M of the Al6 fast ADC assembly schematic diagram in the HP 8560 E-Series Spectrum Analyzer Component Level Information. This 8-bit digital magnitude comparator, U34, compares the digitized samples from the flashADC (latch U29 output) to the programmed video trigger level. The...

H P 8 5 6 0 E - S E R I E S F A S T 0 0 7 ) w 5 9 BLOCK DIAGRAM F R O M P / O A 3 I I I I I I I I I I I I I N T E R F A C E A S S E M B L Y - - - - - 1 P E A K , I I Q V I D E O B U F F E R 1 X l I L - - - - - P A N E L M S 3 J 3 M H z T T L A N A L O G B U S E N A B L E F R O M S H E E T 3 , 0 - - ...

9 IF Section The IF Section contains the A4 log amplifier/Cal oscillator and A5 IF assemblies. Troubleshooting Using the TAM Troubleshooting the Log Amplifier with the TAM Troubleshooting A5 with the TAMTroubleshooting the Cal Oscillator with the TAM Automatic IF Adjustment Parameters AdjustedRequir...

Because the cal oscillator circuitry on the A4 assembly is such an integral part of the IF adjustment, always check this assembly first, before checking the restof the IF Section. A faulty cal oscillator can cause many apparent “faults” inthe rest of the IF Section. Troubleshooting Using the TAM Ref...

Table 9-1. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Procedure to Perform Check Cal Oscillator on A4 Assembly Troubleshooting the Cal Osc with the TAM Check Input Switch on A5 IF Assembly Troubleshooting A5 with the TAM Check Linear Amplifiers on A...

Table 9-2. TAM Tests versus Test Connectors Connectc Manual Probe Troubleshooting Te: Video Input to Interface Video to Rear Panel Video MUX Log Offset/Log Expand Video Filter Buffer Amplifier Video Peak Detectors ADC MUX Variable Gain Amplifier Track and Hold Video Trigger DAC Revision Real Time DA...

A5 IF ASSEMBLY RESOLUTION I OTH I 1 0 . 7 M H z I F A D J O F F DTH ( WHITE ) - - - - - - - - - - - - - - - I C A L O S C I D C I F A D J O F F w 5 4 DISCONNECTED J 3 I L I N E A R w 5 4 J4 L O G I I W I T H C O U N T E R O N B U R S T S O F 5 . 3 5 M H z I A P P R O X 1 0 I ( B R O W N ) w 5 5 J6 I...

3. Set the other spectrum analyzer controls as follows: Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . z Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 2 0 Cen...

Table 9-3. Sweep Width Settings Sweep Width Sweep Time Res BW RANGE MA1 M A O A d j u s t e d Pin2 Pill5 20 5 ms 10 v ov ov 10 10 ms 3 v o v v 4 30 ms 1 v ov 2 15 ms 300 Hz V v v Automatic IF Adjustment The spectrum analyzer performs an automatic adjustment of the IF Section whenever needed. The cal...

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

Most resolution bandwidth problems are a result of A5 IF assembly failures. The resolution bandwidths are adjusted in the following sequence using 300 as the reference: 1 MHz, 2 MHz, 100 30 10 3 1 300 Hz, 100 Hz, 30 Hz, 10 Hz, 3 Hz, and 1 Hz. The 3 Hz and 1 Hz bandwidths are not available with Optio...

3. Set the HP 85623 spectrum analyzer to log mode, with a resolution bandwidth of 300 and single sweep. 4. Using the DMM, check the voltage at pin 6. 5. Verify that this level is about -700 6. Adjust the source amplitude to place the signal at the reference level. 7. Reduce the input signal level in...

2. If an FM signal cannot be demodulated, perform the Demodulator Adjustment procedure. If the output of cannot be adjusted as described in the Demodulator Adjustment procedure, troubleshoot the FM Demodulator or Audio MUX circuits on A4. Refer to function block N of A4 Log Amplifier Schematic Diagr...

amplifier. and are varactor diodes in the limiter filter and are used to tune the filter. Limiter Refer to function block G of A4 Log Amplifier Schematic Diagram (sheet 2 of 4) in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The limiter consists of 7 identical 20 gain stages. ...

The gain is then: This gives an offset-independent gain measurement. The video MUX switches the video output between linear, log and 4.8 IF (for digital The demod video is an unused feature. The easiest way to troubleshoot this circuit is to look for blown Bad are characterized by having significant...

C e n t e r f r e q u e n c y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..30 0 MHz Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MHz 10. On 85623 spectrum analyzer, press and ...

:F 1 0 . 0 2 0 R E 5 S A M P L E C E N T E R 1 0 . 7 0 0 0 0 0 M H z S P A N R E S B W 3 0 0 V B W 3 0 0 S W P 5 0 0 Figure 9-11. Region B Amplitude Variation R E F 1 0 . 0 2 0 I I I I I I I I 5 S A M P L E C E N T E R 1 0 . 7 0 0 0 0 0 M H z S P A N R E S B W 3 0 0 V B W 3 0 0 S W P S K 1 8 0 S K 1...

1 0 d B R L I I C E N T E R V B W 1 S P A N S W P 5 0 m s S K 1 8 3 Figure 9-14. Faulty LC Pole 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 o...

Cal Oscillator A4 Assembly) 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) toadjust part of the IF. (All IF parameters are to be readjusted about every 5 minutes.) With con...

13. Figure 9-17 illustrates normal operation. Severe failures (slope error greater than 30 percent) and subtle 3 resolution bandwidth errors (less than 30 percent) indicate a problem with or 14. Severe failure of the bandwidth accompanied by subtle errors in the output signal indicate an A5 failure....

Refer to function block AB of A4 Log Amplifier Schematic Diagram (sheet 4 of 4) in the HP 8560 E-Series Spectrum Analyzer Component Level Information. 1. Connect a DVM positive probe to pin 4. 2. On the HP 85623 spectrum analyzer, press (CAL). Press FULL IF ADJUST. Observe the DVM reading between th...

1 0 Controller Section 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 Blank Display Digital Signature A...

When measuring voltages or waveforms, make ground connections to The metal board-standoffs are not grounded and should not be used whentaking measurements. Troubleshooting Using the TAM Refer to Chapter 7, “General Troubleshooting,” for information on enabling the TAM for use with the HP 85623 Spect...

7. Move the probe cable to Press SOFT KEY and wait 5 seconds. Press KEY . The results should be sent to the printer. 9. 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 step down key, one less time than the test n...

Digital Signature Analysis (DSA) Digital signature analysis (DSA) places microprocessor, in simplified known state. This simplified state consists of placing a one-word instruction, MOVE QUICK, (0111 x x 1 0 x x x x on the data bus. The microprocessor cycles through its address range continually rea...

5. Compare the signals at the following test points with those illustrated in Figure 10-2. x pin 14 Y pin 3 Z OUT: pin 3 BLANKING: p i n 1 5 Waveforms displayed on an analog scope may show considerably more spikes.This is normal and is due to the wider displayed bandwidth. 6. Troubleshoot the circui...

4 . 0 0 2 . 5 0 V 2 . 0 u s / d i v 9 6 . 0 0 u s I I I I I I I B L A N K I N G nr II II II Figure Expanded Blanking Waveforms S K 1 9 3 Refer to function blocks D and I of A2 controller schematic diagram (sheet 1 of 4) in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The two l...

7. 1 0 . 0 0 . 0 0 v 2 0 . 0 0 . 0 0 0 s I N T E G R A T E S A M P L E LCHAR VECTOR I I II I I I I I I I I I SK194 Figure Switch Driver Waveform LCHAR All of the DAC inputs should change state two or more times within a 5 ms window. If one or more DAC bits are not working correctly, this will effect...

5 . 0 0 0 . 0 0 v 5 . 0 m s / d i v 0 . 0 0 0 s I DEF 1 x Y SK1 100 Figure 10-l 1. Synchronization Frequency-Count Marker Problems The FREQ COUNT function works by dividing the 10.7 MHz IF signal by two (prescaling)and counting the divided-down signal using the frequency counter on the A2 controller...

Frequency Counter See function block Z of A2 schematic diagram (sheet 4 of 4) in the HP 8560 E-Series Spectrum Analyzer Component Level Information. The frequency counter counts the frequency of the last IF and provides accurate timing signals for digital zero-spans. The circuit also provides timing...

Keyboard Problems If the analyzer does not respond to keys being pressed or the knob being rotated, the fault could 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 ove...

Synthesizer Section The synthesizer section includes the A7 switched first LO distribution amplifier, the AllYTO, and parts of the Al4 frequency control and Al5 RF assemblies. Simplified and detailed block diagrams for each assembly are located at the end of this chapter. Troubleshooting Using the T...

Phase Noise Problems Phase Noise in Locked versus Unlocked SpansReference versus Reference PLL Phase NoiseFractional N versus Offset PLL or YTO PLL Phase NoiseFractional N PLL Phase Noise Sampler and Sampler IF Sweep Generator Circuit A21 OCXO All of the assemblies are extremely sensitive to electro...

A l 4 F R E Q U E N C Y C O N T R O L J 7 J 2 3 J 1 8 C O N N E C T O R ) A l 5 RF ( R E V I S I O N I C O N N E C T O R ) Figure 11-l. Al4 and Al5 Test Connectors PIN . . . . . l l . PIN 16 PIN 1 n . . . Figure 11-2. TAM Connector Pin Locations Table 1 l-l. Measured Signal Line Location Measured Si...

Table 11-2. Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Check the YTO loop Check first LO Check first LO pretune frequency and amplitude Check the fractional N oscillator Check 3rd LO drive Check 10 MHz reference to phase/frequency detector Check for...

Table 11-3. TAM Tests versus Test Connectors Connector A143302 Manual Probe Troubleshooting Test Sweep generator Span attenuator DAC Span attenuator switches Sweep + tune mult input amp Sweep + tune mult input switches FAV generator FAV generator 0.5 output YTF offset DAC YTF gain and offset input Y...

Table TAM Tests versus Test Connectors (continued) Connector A155502 Manual Probe Troubleshooting Test Positive 15 volt supply Sampler drive buffer bias Sampling oscillator bias Offset lock drive buffer OFL error voltage Negative 10 volt supply Offset lock loop BW DAC Positive 15 volt supply Offset ...

Troubleshooting Test Setup Some synthesizer section problems require placing the YTO PLL in an unlocked condition.This is done by moving jumper to the TEST position. This grounds the YTO ERROR signal, disabling the ability of the CPU to detect an unlocked YTO. The FM coildriver output is set to its ...

Check A3 ADC MUX Function Block (steps 1-4) 1. Connect the positive lead of a DVM to pin 13 and the negative lead to pin 6. This measures the sampling oscillator tune voltage which is an input to the A3 interface assembly ADC MUX. 2. Set the spectrum analyzer to the following settings: Span . . . . ...

BNC CABLE FREQUENCY COUNTER TEST CABLE A 10 Figure 1 l-4. Sampler and Sampling Oscillator Test Setup 25. At each combination, the frequency counter should measure a sampler IF as shown in Table 11-5. (The sampling oscillator of the offset PLL tunes to the frequencies listed in the table.) If the fre...

Table Sampling Oscillator Test Frequencies HP 8340A CW Frequency 6.067000 6.087000 6.110200 6.141000 4.710000 6.174000 6.193000 6.213000 6.066000 6.069000 6.247000 6.107000 3.912000 6.289000 6.321000 6.333000 HP 85633 Center Frequency Offset Sampling Oscillator Freq Counter Reading Sampler IF 2156.3...

PRETUNE I DOWN 1 REFERENCE INPUT U P A L T E R N A T E - - I Figure 11-5. PLL Locked at Wrong Frequency 11-14 Synthesizer Section

An unlocked PLL can be caused by problems inside or outside the PLL. Troubleshoot this problem by working backward from the oscillator as described in the steps below. Numbers inthe following text identify items in Figure 11-6. 1. The loop integrator output voltage (1) should be attempting to tune t...

4. Confirm proper power levels for the signals at the input to the “N” dividers the reference inputs (5 and and the loop feedback path (6). Unlocked Reference PLL The 600 MHz reference is generated by tripling, then doubling the output of the 100 MHz phase-locked loop. If the 600 MHz reference is of...

31. Measure voltage at pin 5 while adjusting R561. This is the compensated adjustable voltage reference to which the detected voltage is compared. Itshould vary between V and i-O.6 V. 32. Adjust R561 to its limits and verify that the output pin 7 measures approximately Vdc at one limit and -12 Vdc a...

Unlocked Offset Lock Loop (Sampling Oscillator) The offset lock loop drives the sampler. The offset lock loop sampling oscillator tunes to one of sixteen discrete frequencies between 285 MHz and 297.222 MHz. Refer to Al5 schematic. Mixer mixes the oscillator output with 300 MHz from the reference PL...

9. If the signal is not measured near the indicated power, troubleshoot the offset lock loop buffer (function block AM of Al5 RF schematic sheet 3 of 4). Table 11-6. Sampling Oscillator PLL Divide Numbers sampling Center Reference Reference Oscillator Frequency* Divide Frequency F r e q u e n c y ( ...

Unlocked YTO PLL The All YTO is locked to two other oscillators, the fractional N oscillator and the offset PLLsampling oscillator. For LO spans of 2.01 MHz and above, either the FM or main coil of theYTO is swept directly. For LO spans of 2 MHz and below, the fractional N oscillator is swept.The sa...

In fractional N spans (LO Spans MHz) the YTO remains locked to the sweeping fractional N PLL. Thus, the sampler IF must always equal the fractional N oscillatorfrequency (conditions for lock). Since the YTO must always sweep up in frequency, for negative sampler the fractional N oscillator must swee...

Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29. Connect an RF signal-generator output to Set the signal generator ...

Table 11-8. Voltages in FM Coil and Main Loop Drivers Measurement Points Voltages pin 6 Vdc pin 2 0 Vdc pin 4 Vdc Check main coil coarse and fine (steps 41-44) 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...

50. If the spectrum analyzer center frequency is 300 MHz, the voltage at pin 3 should measure -3.35 V f0.25 V. The voltage may also be determined from the following equation: V -(first LO Frequency -2.95 x 2.654 51. The voltage at pin 2 should measure -3.4 V f0.2 Vdc. This represents a current setti...

Unlocked Fractional N PLL The fractional N oscillator is used in the HP 85633 as a reference for the first LO phase locked loop. It provides the 1 Hz start-frequency resolution for the first LO, and is the means by which the first LO is swept in LO spans of 2 MHz or less (fractional N spans). Thepre...

Table 1 l-10. Postscaler Divide Numbers Divide Number 7 6 5 0 1 1 Input Range (MHz) output Range (MHz) 840 to 973 834 to 987.96 823.2 to 960 60.0 to 69.5 69.5 to 82.33 82.33 to 96.0 If the output frequency is wrong by less than 1 MHz, the phase locked loop is not unlockedbut still requires repair. C...

Table 1 1. Unlocked Fractional N Troubleshooting Areas Measured VCO Frequency Relative to Expected Value Measured > expected Measured expected Measured, not oscillating Below -4 V VCO clamp VCO clamp VCO clamp Tune Voltage Divider or integrator v c o Divider or integrator Divider or integrator v ...

Table 11-12. Divider and Integrator Troubleshooting Measured VCO Frequency Relative to Expected Value Measured > expected Measured expected TP6 Frequency zero MHz 2.5 MHz MHz Dividers Dividers Dividers Det or integrator Both Det or integrator Dividers Dividers 10. Divider troubleshooting: a. Chec...

Frequency Span Accuracy Problems The spectrum analyzer employs lock-and-roll tuning to sweep the first LO for spans greater than 2.0 MHz. The first LO is locked to the start frequency immediately after the previoussweep has been completed. The first LO is then unlocked, and, when a trigger signal is...

For YTO main coil spans, the YTO is locked at the beginning of the sweep and the sweep ramp is summed into the main coil tune driver. 1. Perform the YTO adjustment procedure in Chapter 2, “Adjustment Procedures.” If the YTO adjustments cannot be performed, continue with step 2. 2. Set the spectrum a...

Set the spectrum analyzer to the following settings: Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . z Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trigger . ....

16. Use a DVM to monitor the voltage at pin 4. The voltage should measure approximately -8.45 Vdc. 17. Set the spectrum analyzer sweep time to 100 ms. The voltage at J18 pin 4 should measure approximately -4.21 Vdc. 18. Set the spectrum analyzer sweep time to 200 ms. The voltage at J18 pin 4 should ...

Phase Noise Problems System phase noise can be a result of noise generated in many different areas of the spectrum analyzer. When the spectrum analyzer is functioning correctly, the noise can be observed as a function of the distance away (the offset) from the carrier frequency. The major contributo...

Sampler and Sampler IF The sampler creates and mixes harmonics of the sampling oscillator with the first LO. The resulting sampler IF (60 MHz to 96 MHz) is used to phase-lock the YTO. The sampler IF filters unwanted products from the output of and amplifies the IF to a level sufficient to drive the ...

10. Set a microwave source to the following settings: Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5dBm 11. Connect the mi...

The HSCAN signal uses Q2 to reset the ramp. Q2 shorts the integrator and sets its output nominally to ground. A l 4 F R E Q U E N C Y A S S E M B L Y A l l YTO F R A C N P L L - - - - - FRAC N TEST A P P R O X - 1 0 6 0 T O 9 6 M H z S A M P L E R I F - 1 0 T O 6 0 T O 9 6 M H z ----- 1 A 7 S W I T ...

S A M P L E R I F F R O M A l 5 - 1 0 T O 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 P O S T S C A L E R FRAC N TEST- 1 0 G E N E R A T O R 1 4 0 6 . 6 T O 5 0 0 M H z I 8 0 0 T O 1 0 2 0 M H z F r a c t i o n a l ND i v i d e I I I I I I Figure 1 l-l 1. Simplified Al4 Assembly Block ...

A21 OCXO The spectrum analyzer uses an oven-controlled crystal oscillator (OCXO). It is deleted in Option 103 and replaced by a temperature-compensated crystal oscillator (TCXO), located on the Al5 RF assembly. Connectors and on the Al5 RF assembly are located where the TCXO would be installed in an...

12 RF Section The RF Section converts the input signal to a 10.7 MHz IF (Intermediate Frequency). See the detailed block diagram, Figure 12-8. The block diagrams for the Al4 and Al5 assemblies are located in Chapter 11, “Synthesizer Section.” Troubleshooting Using the TAMLow Band ProblemsHigh Band P...

Use of an active probe, such as an HP with another spectrum analyzer is recommended for troubleshooting the RF circuitry. If anHP 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 or ...

Table 12-1. 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 First LO Distribution Amplifier Check A8 Low Band Mixer Check A9...

Table 12-2. TAM Tests versus Test Connectors Connector Manual Probe Troubleshooting Test Measured Signal Lines Y T F O f f s e t D A C MS6 YTF Gain and Offset Input MS2 YTF Gain DAC MS1 YTF Drive MS3 Band Switch Driver MS8 Main Coil Coarse DAC MS3 L O D A D r i v e MS5, MS6, MS7, MS8 Second Conv PIN...

5. If the LO feedthrough amplitude is higher than -5 (signal will be “clipped” at top of screen) and signals are low in amplitude, suspect a defective A8 mixer assembly. 6. Perform the steps located in “Control Latch for Band-Switch Driver” in this chapter. 7. Check Al3 second converter mixer diode ...

10. Check Third Converter as follows: a. On the HP 85623, press and set the controls as follows: Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

A9 Input Attenuator 1. Perform the “Input Attenuator Switching Uncertainty” performance test in Chapter 2, “Using Performance Tests,” of the HP 8560 E-Series Spectrum Analyzer Calibration Guide. 2. If there is a step-to-step error of approximately 10 or more, continue with step 3. 3. On the spectrum...

The logic levels listed in Table 12-3 show the default ac usage (pin 5 low, pin 6 high). D C usage (pin 5 high, pin6 low) is not shown. Table 12-3. HP 8562E Attenuator Control Truth Table HP 85623 I Pin Number Setting I Setting 3 4 5 6 10 4 10 0 10 2 0 3 0 4 0 5 0 6 0 7 0 3 20 high high low low high...

Al4 Frequency Control Assembly The block diagrams for the Al4 and Al5 assemblies are located in Chapter 11, “Synthesizer Section.” Refer to function block Z on the Al4 Frequency Control Schematic Diagram (sheet 3 of 5) in the HP 8560 E-Series Spectrum Analyzer Component Level Information. 1. Set the...

L O D I S T R I B U T I O N A l l Y T O J 3 I J 2 S A M P L E R O U T - 9 T O - 2 H I B A N D T O J 5 I L O B A N D T O I L O O U T 1 4 . 5 T O 1 8 . 5 F O R H P 8 5 6 1 E ) 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 O N L Y O N E M I X E R O U T F O R H P II SCHEMAT I C 3 OF 5 - - - ...

Al5 RF Assembly The block diagrams for the Al4 and Al5 assemblies are located in Chapter 11, “Synthesizer Section.” 1. Perform the “IF Input Amplitude Accuracy” performance test in the 8560 E-Series Spectrum Analyzer Calibration Guide. This exercises most of the third converter. 2. If the performanc...

b. Check pin 3 for approximately Vdc (Option 103 only). c. Check for a 10 MHz sine wave greater than or equal to 1 V p-p at (standard HP or at pin 3 with an oscilloscope (Option 103). 10. If the signal at pin 13 is correct (see Figure but there is a problem with the signals at or suspect or in the 1...

W H E N TROUBLESHOOTING THE POWER SUPPLY USE AN I S O L A T I O N TRANSFORMER FRONT PANEL LED 1 w 3 F L 4 F L 4 L I N E L I N E L I N E SW I TCH SW I TCH M O D U L E M O D U L E AND CONNECT T O PROBE POWER W I POWER SUPPLY I N D I C A T O R L E D S 4 2 - 1 2 . 6 w 7 CRT - 1 5 C R T D R I V E R GENER...

Table 13-l. Power-Cable Connections Signal NCNC A GND - 5 v 47 -5 v 46 A GND NC NC A GND S C A N R A M P 4 1 NC A GND - 1 2 . 6 V 38 -15 v A GND - 1 5 v v A GND t 1 5 v v t 2 8 v PWR UP 2 9 - 1 5 v - 1 5 v t 1 5 v t 1 5 v t 5 v t 5 v t 5 v t 5 D G N D ’ 20 D GND 1 9 A GND 1 8 A GND 17 D GND 16 D GND...

Table 13-1. Power-Cable Connections (continued) Signal v 12 39 11 40 10 41 41’ 9 42 8 43 v 7 44 V 6 45 LINE TRIGGER 46 v 4 47 v 3 48 - 1 5 v 2 49 49 - 1 5 v 1 50 50 Indicates signal source. Table 13-2. Automatic Fault Isolation References Suspected Circuit Indicated Manual Procedure to Perform by Au...

A 1 7 C R T D R I V E R I J 4 ( R E V I S I O N C O N N E C T O R ) Figure 13-2. Al7 Test Connector Table 13-3. TAM Tests versus Test Connectors Manual Probe Troubleshooting Test Measured Signal Line! Revision MS5 Constant current Source MS1 Intensity input MS7 Intensity offset MS7 Blanking control ...

2. All of the power-supply indicator along the edge of the A2 controller assembly should be lit. 3. The rear-panel CRT VDC ON indicator should also be lit. 4. Connect the TAM probe cable to Press SOFT KEY SOFT KEY (The top soft key is 6. The yellow LED next to should blink approximately ten times. I...

5. If all of the power supply indicators along the outside edge of the A2 controller assembly are lit, the A6 power supply is probably working properly. F R O N T V I E W I I I I I S K 1 1 2 2 Figure 13-3. Probe Power Socket 6. Press , 1, 7. Allow the spectrum analyzer to warm up for at least 1 minu...

6. TTL-level pulses should be observed. If the signal is either always high or always low, the display will be blanked; suspect the A2 controller assembly. 7. If the signals on pins 3, 14, and 15 are correct, troubleshoot the Al7 CRT driver. Display Distortion The HP 85623 spectrum analyzer uses a v...

12. If signals are correct and cables to CRT are good, suspect the CRT. Focus Problems Focus problems may be due to a defective CRT, the Al7 CRT driver (especially the grid level shifter section), or the A2 controller focus-control circuitry. Focus problems may also be due to improper adjustments, i...

13. Verify that the front-panel intensity adjustment when used with the Z FOCUS changes the peak-to-peak voltage at by 25 V. Access the intensity adjustment by pressing and turning the front panel knob. 14. Set the front-panel intensity to minimum. Set Z FOCUS and X FOCUS fully counterclockwise. Ver...

The following measurements should be made with a high-voltage probe, such as the HP 34111A. When using the high-voltage probe, connect the ground lead securely to the spectrum analyzer chassis. 7. Carefully measure the grid voltage at pin 6, and the cathode voltage at pin 4. The display will work wi...

A6 Power Supply Assembly Troubleshooting The spectrum analyzer 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 sepa...

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 8562 Spectrum Analyzer Documented Assemblies Board Assembly Instrument Assembly CLIP Part Number Serial Part Number Keyboard 3611A and above 08562-60140 A2 Controller Assembly 3611A and above A3 Interface Assembly 3611A and above 08563-60098 A4 Log Amplifier/Cal Osc 3611A through 3724A...