16
Installation Note N9020-90257
Option BBA, Analog Baseband I/Q Inputs Retrofit Kit
RF Bracket
Replacement
1.
Locate coax cable 8121-1401 and cable labels in the Opt BBA cable kit,
Figure 10
BBIQ Coax Cable Location
2.
Label one end of the cable with marker 707 and the other end of the cable with marker 101.
3.
for cable routing instructions. It is important that the new BBIQ coax cable
(1)
is placed in cable clip slot 3. Slots 1 and 2 will have semi-rigid cables in them. Slots 3
through 6 will have existing coax cables. Move these four cables over one slot each to slots 4
through 7 and place the BBIQ cable in slot 3.
4.
Install the “707” end of the 8121-1401 cable to J707 on the Reference board.
5.
Install the “101” end of the 8121-1401 cable to J101 on the BBIQ Main Board.
6.
. Replace the RF bracket
(1)
by replacing the eight screws provided in this kit,
0515-0372
(2)
using the T-10 driver. Torque to 9 inch-pounds.
There are coax cables in the cable clip that are tie-wrapped to a semi-rigid cable. Cut that
tie-wrap and move the cables to the new cable clip locations. Use a new tie-wrap (supplied in
this kit) to attach all the coax cables to the semi-rigid cable.