Hughes HughesNet Ka-band, Pointing Manual

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Chapter 2 • Pointing the antenna
1037663-0001 Revision A
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4. When the signals are peaked, tighten the azimuth and
elevation bolts completely, then loosen the bolts just enough
so that you can adjust the azimuth and elevation with the fine
azimuth and elevation pointing tools. By tightening the bolts
to this level, you can avoid any unwanted movement during
antenna lockdown.
Fine pointing
Fine pointing or dithering is the process of more accurately
pointing the antenna at the satellite. During this phase, the
squinter and fine az/el mechanism are used to finely align the
antenna and lock it down. The squinter, which blocks off one half
of the feed horn, is placed alternately in four different positions
on the feed horn, two for measuring azimuth and two for
measuring elevation. When the antenna is pointed correctly, the
SQF readings at the two azimuth positions will match, and the
readings at the two elevation positions will match.
The following steps describe the fine-pointing process.
1. Place the appropriate squinter for the antenna on the feed
horn. Refer to Table 3 below to determine which squinter you
should use, then follow the appropriate procedure.
Table 3: Determining which squinter to use
Antenna
Squinter
Type
Hughes
Part Number
Prodelin
.74m antenna
(elliptical feedhorn)
A 1501447
Prodelin
.98m, 1.2m, or 1.8m
antenna
(circular feedhorn)
B 1501454
Raven .74m or .98m
antenna
(circular feedhorn)
C 1501451
Note: Squinters are available in three sizes to accommodate
all of the antenna dish sizes. Be sure to use the correct
squinter for the antenna as listed in Table 3.