ViaSat Series 8345, Installation Manual

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Chapter 2 - Installation
2.12.3 Installation of Ku-Band Feed
Install a typical Ku-band feed using the following procedures.
NOTE
If the C-band feed is used, do not use this procedure. Instead,
use the procedure specifically for the C-band feed. This
procedure is only applicable to installation of the Ku-band
feed.
1. The feed window is a small sheet of llumar (a clear plastic-like material), 3.45
inches diameter and 0.005 inches thick. It can be found in the feed pack in a
small plastic sheath marked 301676. The window installs into a small groove in
the front of the corrugated flange of the feed. Refer to Figure 2-17 and perform
the following:
a. Stand the feed on a flat surface such as a table, with the corrugations facing
up.
b. Lay the window on top of the corrugations, and flex it in the middle slightly,
so that part of the edge may be inserted into the groove.
c. While holding the window near the point it was first inserted, slowly work
the remainder of the window into the groove. Work away from the starting
point in both directions using both hands, all the way around the periphery
of the window to the opposite side. When almost all the window is in the
groove, it will be buckled near the part which isn't in the groove.
d. While holding the window against the face of the corrugations, the
remainder of the window may be guided into the groove using a fingernail.
2. If the preceding procedure should prove too difficult, an alternative method of
installation may be used. Refer to Figure 2-17 and perform the following:
a. Using a pair of scissors or a razor blade, make a 1/8 inch long cut in the
window from the edge toward the center.
b. Bend the window on one side of the cut down into the groove in the feed,
and screw the window into the groove. As the window is turned, guide the
edge into the groove using a finger or fingernail.
c. The window is properly installed when it can be easily spun in the groove
using a finger.
42S199F
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