Installation Note N9030-90077 19
Option BBA, Analog Baseband I/Q Inputs Upgrade Kit
4. Assure the flex ribbon cable is flat against the chassis and partially behind the switches (if
present). Also ensure there is a very small bit of slack in the flex ribbon cable where it goes
through the chassis so the cable can easily be removed from the BBIQ main board.
Instruments with the Switch Assembly
1. Position the switch assembly, removed earlier in its mounting location, being careful to align
the semi-rigid cable with the switch ports. Assure the lower threaded mounting tab is behind
the low band switch bracket. Do not attach the switch bracket with screws yet.
2. Assure the gray coax cable is routed under the switch bracket, laying on top of the switch
body.
3. Reinstall W52 and tighten W54 and W53. Attach cables W2 and W8. Reinstall W51. Torque to
10 inch-pounds.
4. Attach the switch assembly using the 3 screws removed previously
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