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Assembly Replacement ESG Family Signal Generators
AT1 Electronic Attenuator/RPP
5-46 Service Guide
AT1 Electronic Attenuator/RPP
Tools Required
• T-10 TORX screwdriver
• 5/16-inch open-end wrench
Removal
1. Remove the instrument cover. (Refer to the “Instrument Cover” replacement procedure
on page 5-64.)
2. Remove the top cover by removing the 11 screws that secure it.
3. If you have Option 1E6, remove the pulse modulator assembly (A25). (Refer to the
“A25 Pulse Modulator” replacement procedure on page 5-41.)
4. Disconnect W9, W13, and W14 from the electronic attenuator/RPP (AT1).
(See Figure 5-28.)
5. Remove the two screws (item 1) that attach the attenuator/RPP to the instrument
chassis.
6. Tilt the attenuator/RPP away from the chassis wall, then carefully lift it out of the
instrument.
NOTE There are two hinged tabs at the bottom of the attenuator/RPP that fit into
slots in the instrument chassis. Therefore, it is necessary to tilt the
attenuator/RPP away from the chassis wall so that the tabs can be guided out
of the slots.
Replacement
1. Reverse the removal procedure and do the following:
• When reinstalling the electronic attenuator/RPP (AT1), remember to insert its
hinged tabs into the slots located at the base of the chassis wall on which the
attenuator/RPP will be mounted.
• Torque W9 and W14 to 9 in-lbs.
• Torque the two T-10 TORX screws to 9 in-lbs.