Hughes HughesNet Ka-band, Pointing Manual

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Chapter 2 • Pointing the antenna
1037663-0001 Revision A
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c. Wait for the SQF reading to settle on a value. (The time
required is a function of whether you are using the short
filter or the long filter.) When the reading has settled, note
the SQF value on the display.
d. Rotate the outer piece of the squinter 180 degrees on the
feed horn to the opposite azimuth position, until the bubble
is centered again, then check the reading.
e. Compare the two SQF readings. They should be as close as
possible to within 5 SQF points. Continue to adjust the
azimuth using the fine az/el tool, and take pairs of azimuth
readings until the two azimuth values are within the
tolerance level of 5 SQF points.
f. Repeat steps b through e for the two elevation positions,
using the bubble in the elevation level to accurately
position the squinter.
Figure 10: Positioning the squinter properly
Note: If using the short filter, you must wait at least 3
seconds at each dither point. If you do not wait before
recording the reading, the pointing signal may not have
reached its steady-state value, and will cause a pointing
error. If you use the long time constant filter, you should
wait at least 15 seconds to take a reading.
Note: The tolerance level after antenna lockdown is 15
SQF points. However, the position of the antenna will shift
during lockdown, so you will need to get within 5 points at
this time to compensate.