E8257D/67D, E8663D PSG Signal Generators Service Guide
3- 1
3 Assembly Replacement
Before You Replace an Assembly
CAUTION Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge
(ESD). Perform service procedures only at a static–safe workstation and wear a grounding strap.
Be sure to review the warning and caution statements described in Chapter 5, “Safety and Regulatory,” on page 5- 1,
prior to replacing an assembly in your signal generator.
After Replacing or Repairing an Assembly
After you have replaced or repaired an assembly, performance tests and adjustments may need to be performed.
Please refer to Chapter 3, “Assembly Replacement,” for the list of performance tests and adjustments required for each
assembly.
Assemblies That You Can Replace
• “Outer Instrument Cover” on page 3-4
• “Inner Instrument Cover” on page 3- 6
• “Front Panel” on page 3- 8
• “A1 Keyboard” on page 3- 11
• “A2 Display” on page 3- 14
• “A2DS1 Display Backlight (serial number prefix < US/MY5XXX3XXX only)” on page 3- 17
• “A3 Power Switch” on page 3- 19
• “A4 Inverter (serial number prefix < US/MY5XXX3XXX only)” on page 3- 22
• “A5 Sampler, A6 Frac–N, A7 Reference (Standard and Option UNR/UNX/UNY), A8 Output, A45 Frac- N and A46
Offset” on page 3- 23
• “A9 YIG Driver” on page 3- 24
• “A10 ALC” on page 3- 26
• “A11 Pulse/Analog Modulation Generator” on page 3- 28
• “A12 Pulse Modulator Board” on page 3- 30
• “A13 I/Q MUX (E8267D Standard or with Option 015) (Serial Prefixes <US4722/MY4722)” on page 3- 32
• “A13 I/Q MUX (E8267D Standard or with Option H16/016) (Serial Prefixes >=US4722/MY4722)” on page 3- 34
• “A14 Baseband Generator (E8267D Only)” on page 3- 36
• “A17 Baseband Generator Interface (E8267D Only)” on page 3- 38
• “A18 CPU” on page 3- 40
• “A18BT1” on page 3- 42
• “A19 Power Supply” on page 3- 44
• “A20 SMI (Source Module Interface)” on page 3- 46
• “A21 Rear–Panel Interface” on page 3- 48
• “A22 Line Module” on page 3- 50
• “A23 Lowband Coupler/Detector” on page 3- 52
• “A24 20 GHz Highband Coupler (Options 503, 509, 520, and 521)” on page 3- 54
• “A24 50 GHz Highband Coupler (Options 532 and 544)” on page 3- 60
• “A24 67 GHz Highband Coupler (Options 550 and 567)” on page 3- 62
• “A25 20 GHz Highband Detector (Options 503, 509, 520, & 521)” on page 3- 64
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