18 Installation Note N9030-90077
Option BBA, Analog Baseband I/Q Inputs Upgrade Kit
8. Carefully slide the switch assembly towards the back of the instrument. Assure the cables in
the switch ports are free to slide out.
9. Slightly lift the two semi-rigid cables above the switch assembly and pull the switch away
from the chassis.
Installation of the Flex Ribbon Cable
1. Locate the 8121-1683 flex ribbon cable in the kit. Push the rubber cable protector against the
cable connector on the end of the cable that does not have the ferrite block. When installed,
the end of the cable with the ferrite block will attach to the front panel.
2. Refer to Figure 12. Notice the flex cable orientation. The cable is routed between the chassis
and the colored wire harness. The connection side of the cable is pointing outward. The switch
assembly ribbon cable (if present) and low band assembly ribbon cables are on the outside of
the flex ribbon cable.
Figure 12 Flex Cable
3. Install the flex ribbon cable onto the BBIQ main board. Slide the flex ribbon cable through the
slot in the chassis nearest the BBIQ main board. Make sure the rubber cable protector is
against the cable connector. Assure the pins of the BBIQ main board connector are aligned
with the ribbon cable connector and carefully make the connection.
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