Harris Corporation Constellation™
Field-Replaceable Units 12-11
FIELD-
REPLACEABLE
UNITS
Removing and Installing the 100 MHz OCXO
1. Place the Transmitter Assembly on a flat surface.
2. Disconnect the MCX connector (J4) by carefully pulling it up straight from
the printed circuit board. The connector is designated
100MHz
on the
board. See
Figure 12-8
.
3. Disconnect the power connector from the printed circuit board.
4. Carefully pull out the 100 MHz OCXO from the Transmitter Assembly,
taking care not to remove the grommets from the printed circuit board.
5. Remove the SMA cable from the OCXO you have just removed. See
Figure
12-3
.
Figure 12-3 100 MHz OCXO
6. Remove and retain the 4 SEMS Phillips screws, washers, and spacers from
the bottom of the OCXO.
7. Obtain a new 100 MHz OCXO.
8. Install the 4 spacers with the SEMS Phillips screws and washers you
removed in
step 6
onto the bottom of the new OCXO.
9. Connect the SMA cable you removed in
step 5
onto the 100 MHz OCXO. Do
not tighten.
10. Install the new OCXO onto the Transmitter Assembly, ensuring the
grommets remain in place.
11. Plug the power connector onto the printed circuit board.
12. Carefully plug the MCX connector into the receptacle designated
100MHZ
.
13. Use a torque wrench to tighten (8-9 inch-pounds) the SMA connector you
installed in
step 9
.
14. For Transmitter Assembly installation procedures, go to
page 12-12
.
SEMS Phillips screw
and washer (4)
100 MHz OCXO
Power cable
MCX connector
SMA cable
Spacer (4)
To Next Page
Loading...
