At1 90 Db Attenuator (Option 1Em); Tools Required; Removal Procedure; Replacement Procedure - Keysight Technologies E8257D Service Manual

Assembly Replacement

AT1 90 dB Attenuator (Option 1EM)

AT1 90 dB Attenuator (Option 1EM)

Tools Required

— T–10 driver
— 5/16" open–ended wrench

Removal Procedure

Refer to
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to
3. Position the signal generator with the A31 Motherboard facing you so that
4. Disconnect the AT1W1 ribbon cable from A26J13.
5. Using the 5/16" open–ended wrench, disconnect the W81 and W94 RF
Cables W81 and W94 are easily damaged. DO NOT bend them. Bending the
cables can damage the center conductor, which could result in power "holes".
6. Using the T–10 driver, remove the two screws that attach the AT1 90 dB
7. Remove the AT1 90 dB Attenuator.
8. Using the T–10 driver, remove the sheet metal from the attenuator.

Replacement Procedure

1. Reverse the order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
3. Torque all RF connectors to 8 in–lbs.
4. Perform the post–repair adjustments and performance tests that pertain
E8257D/67D, E8663D PSG Signal Generators Service Guide
Figure 3-75 for this procedure.
Cover" on page 258 and
the RF deck is on top.
cables from the AT1 90 dB Attenuator.
Attenuator to the side panel.
to this removal procedure.
"Inner Instrument Cover" on page
"Outer Instrument
260.
395