356 E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
A33 6dB PAD (Options 503, 509, 513, 520, and 521)
A33 6dB PAD (Options 503, 509, 513, 520, and 521)
Tools Required
— 5/16” open–ended wrench
— needle–nose pliers
Removal Procedure
Refer to Figure 3-56 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument
Cover” on page 258 and “Inner Instrument Cover” on page 260.
3. Using the 5/16” open–ended wrench, disconnect the A33 6dB PAD from
the A24 20 GHz Highband Coupler.
4. Using the 5/16” open–ended wrench, disconnect the A33 6dB PAD from
the A25 20 GHz Highband Detector.
5. Remove the A33 6 dB PAD.
Replacement Procedure
— Reverse the order of the removal procedure.
— Torque all RF connectors to 8 in–lbs.
— Perform the post–repair adjustments and performance tests that pertain to
this removal procedure.
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