COBHAM Sea Tel 9711-56 IMA C Band, Installation Manual

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Sea Tel 9711-56 IMA Maintenance
17-5
EAR Controlled - ECCN EAR99
17.3.2. Installing the Linear/Circular Selectable Feed Assembly
Refer to the procedure below to install the Linear/Circular Selectable feed assembly on the 2.4.m
meter offset reflector.
1. Assure that the MXP is set to
Horizontal TX Polarity.
2. If this is the initial installation
of a drop-in feed, skip to step
12.
3. If switching drop-in feeds,
remove the currently
installed drop-in by following
step 4-10.
4. Disconnect the coax
connections to the LNB(s).
5. Disconnect the flexible
waveguide from the rigid
waveguide.
6. Disconnect the feed harness.
7. Tie the reflector down, or
have someone hold it until
the drop-in feeds have been
swapped.
CAUTION: The dish will be very back
heavy when the drop-in feed is
removed, therefore, the reflector will
rise VERY abruptly if not held down
until the weight of the feed is
replaced.
8. Remove the eight screws
(see red arrows) from the
front of the scalar plate to
disconnect the drop-in feed
from the scalar plate.
9. Remove the drop-in feed
assembly that is being
replaced.
10. Your scalar plate remains
attached to the feed struts as
shown.