E8257D/67D, E8663D PSG Signal Generators Service Guide 369
Assembly Replacement
A35 3–20 GHz I/Q Modulator (E8267D Only - Standard or with Option 015)
A35 3–20 GHz I/Q Modulator (E8267D Only - Standard or with
Option 015)
Tools Required
— T–10 driver
— 5/16” open–ended wrench
— needle–nose pliers
Removal Procedure
Refer to Figure 3-61 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. Position the signal generator with the A31 Motherboard facing you and the
RF deck on top.
4. Using the 5/16” open–ended wrench, disconnect the following RF cables:
— W105 from A35J4
— W77 from A35J1
— W78 from A35 I/Q MOD
— W104 from A35J3
5. Using the needle–nose pliers, disconnect the following flexible cables:
— W62 from A35J7
— W63 from A35J6
— W79 from A35J9
— W80 from A35J106
— W97 from A35J8
6. Using the T–10 driver, remove the three screws (1) that attach the A35 I/Q
MOD to the RF deck.
7. Disconnect the W70 ribbon cable from the A35 I/Q MOD.
8. Remove the A35 I/Q MOD from the RF deck.
Replacement Procedure
— Reverse the order of the removal procedure. (See the internal cover overlay
for cable color codes.)
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