E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
Rear Panel (Standard)
3-94
Rear Panel (Standard)
Tools Required
• T–10 driver
• needle–nose pliers
• 5/16” open–ended wrench
Removal Procedure
Refer to Figure 3- 57 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument Cover” on page 3- 4 and “Inner
Instrument Cover” on page 3- 6.
3. Using the T–10 driver, remove the four screws from the Baseband Generator cover
(E8267D only).
4. Position the signal generator with the A31 Motherboard panel facing you.
5. Using the needle–nose pliers, disconnect the following flexible cables:
• W21 (10 MHz output) from A31 Motherboard J1043
• W47 from A31 Motherboard J1041
• W22 (10 MHz input) from A31 Motherboard J1042
• W68 (BBG Rear Pwr) from A31 Motherboard J250 (E8267D only)
• W80 (WIDEBAND I INPUT) from A35 3–20 GHz I/Q Modulator J106 (E8267D only)
• W79 (WIDEBAND Q INPUT) from A35 3–20 GHz I/Q Modulator J9 (E8267D only)
6. Position the signal generator with the rear panel facing you.
7. Using the needle–nose pliers, disconnect the following flexible cables:
• W55 (SOURCE MOD INTERFACE) from A10 ALC J304
• W65 (BASEBAND GEN REF IN) from A14 Baseband Generator Board J800 (E8267D only)
• W56 (– Q OUT) from A13 I/Q MUX J14 (E8267D only)
• W57 (– I OUT) from A13 I/Q MUX J13 (E8267D only)
• W58 (Q OUT) from A13 I/Q MUX J12 (E8267D only)
• W59 (I OUT) from A13 I/Q MUX J11 (E8267D only)
8. Using the 5/16” open–ended wrench, disconnect the following cables:
• W67 (.25–3.2 GHz COH CARRIER) from the Rear Panel (E8267D only).
• (1 GHz Out) from the Rear Panel.
9. Disconnect the following ribbon cables:
• W64 from A17P2 (E8267D only)
• W90 from A17P1 (E8267D only)
• W20 from A20 SMI J1
• W18 from A21 Rear Panel Interface J3
• W23 from A21 Rear Panel Interface J2
• W136 from A40 Compact Flash PCA (if Option 008/009 is installed)
10. If the signal generator has option UNR/UNX, disconnect the W48 flexible cable from A32 10 MHz Crystal Oscillator
(Option UNR/UNX).
11. Using the T–10 driver, remove the eleven screws (1) that secure the Rear Panel to the instrument chassis.
12. Using the needle–nose pliers, disconnect A22W1 from the power supply.
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