182 Chapter 4
Assembly Replacement
A7 Baseband I/Q Assembly (Option B7C)
A7 Baseband I/Q Assembly (Option B7C)
Removal
Step 1 Remove the Outer Case and Top Brace
1. If you haven’t already done so, remove the instrument outer case.
Refer to the removal procedure for the"Instrument Outer Case" on
page 171.
2. Remove the instrument top brace. Refer to the removal procedure for
the "Top Brace" on page 173.
Step 2 Remove the Baseband I/Q Cable Assembly
1. Disconnect the I, I
, Q, and Q cables from their respective connectors
on the top-front of the A7 assembly. Each connector is labeled both
with the I/Q designation and the numerical code of the cable. For
example, the Q connector is labeled “Q, 14”. In Figure 4-9:
Item 1 is the Q (14) cable.
Item 2 is the Q
(15) cable.
Item 3 is the I (12) cable.
Item 4 is the I
(13) cable.
Figure 4-9 Cable Routing from Front Panel to A7 Assembly
2. Detach the four, bundled I/Q wires from the cable clip (1400-3014)
that is located on the rear of the front panel assembly, as shown in
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