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9-11. Region B Amplitude Variation ....................
9-12. Region B Amplitude Offset ......................
9-13. Faulty Crystal Short ........................
9-14. Faulty LC Pole ...........................
9-15. Faulty Crystal Symmetry ......................
9-16. Output Waveform, 10 kHz Resolution Bandwidth ............
9-17. Output Waveform, 3 kHz Resolution Bandwidth ............
9-18. Output Waveform, 1 kHz Resolution Bandwidth ............
9-19. Output Waveform, 300 Hz Resolution Bandwidth ............
9-20.
Failed Crystal Set Symptoms .....................
9-21. A4 Log Amplifier/Cal Oscillator Block Diagram ............
9-22. A5 IF Assembly Block Diagram ....................
10-l. A2 Test Connectors .........................
10-2. Line Generator Output Waveforms ..................
10-3. Blanking Waveforms ........................
10-4. Expanded Blanking Waveforms ....................
10-5. Switch Driver Waveform LCHAR ...................
10-6. Distorted X/Y Line Generator Waveforms ...............
10-7. Expanded X/Y Line Generator Waveforms ...............
10-S. Normal X/Y Line Generator Waveforms ................
10-9.
Delta X Waveform .........................
10-10. Delta Y Waveform .........................
10-11.
DEFl
Synchronization ........................
10-12. A2 Controller Block Diagram
.....................
11-l. Al4 and Al5 Test Connectors
....................
11-2. TAM Connector Pin Locations
....................
11-3. YTO Loop Test Setup
........................
11-4. Sampler and Sampling Oscillator Test Setup ..............
11-5. PLL Locked at Wrong Frequency
...................
11-6. Unlocked PLL
...........................
11-7. Troubleshooting an Unlocked YTO PLL ................
11-8. VCO Bias Voltages
.........................
11-9. HP 85623 Sweep and Scan Ramps ..................
11-10. Simplified Synthesizer Section ....................
1 l-11. Simplified Al4 Assembly Block Diagram
................
11-12. Simplified Al5 Assembly Block Diagram
................
11-13. Frequency Control Block Diagram
...................
11-14. RF Assembly Block Diagram .....................
12-1. Al4 and Al5 Test Connectors
....................
12-2. A14J10, Solder Side of Al4 (Ig
nore Pin Numbers on Mating Connector) . .
12-3. A7 First LO Distribution Amplifier Drive
...............
12-4. HP 85623 Rear-Panel LO SWP Output
................
12-5. HP 85623 Signal at A14J15 Pin 1
...................
12-6. 10 MHz Reference at A15J302 ....................
12-7. 10 MHz TTL Reference at
U304
Pin 13
................
12-8. Figure 12-8. RF Section, Troubleshooting Block Diagram ........
13-1. Simplified Section Block Diagram ...................
13-2. Al7 Test Connector .........................
13-3. Probe Power Socket .........................
13-4. A6 Power Supply Block Diagram ...................
13-5. Al7 CRT Driver Block Diagram
...................
9-28
9-28
9-29
9-30
9-31
9-35
9-36
9-36
9-37
9-37
9-41
9-45
10-3
10-5
10-6
10-7
10-S
10-9
10-9
10-10
10-11
10-12
10-13
10-17
11-3
11-3
11-11
11-12
11-14
11-15
11-25
11-34
1 l-42
1 l-47
1 l-48
1 l-49
11-51
11-53
12-2
12-6
12-12
12-14
12-14
12-21
12-22
12-25
13-2
13-5
13-7
13-19
13-21
Contents-13