KVH Industries KVHTRACVISION G4, Техническое руководство

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LNB “Skew” Adjustment
Unlike most satellite TV signals in North America, which are
circularly polarized, the PAS 9 signal is linearly polarized, which
means it is transmitted in a certain orientation. Your Sky Mexico-
configured antenna is equipped with a special LNB that collects
these linear signals. To optimize reception, however, the LNB
must be oriented in the same way as the satellite signal. This
orientation adjustment is referred to as the LNB’s “skew.”
Figure 1 shows how skew determines the amount of signal the
LNB collects. The more signal it collects, the better the reception.
To set the skew, you simply need to rotate the LNB to the proper
angle, as shown in Figure 2.
The correct skew setting varies depending on your geographic
location, since the orientation of your antenna to the satellite
changes as you move. Follow the instructions on the following
pages to find the correct skew for your location and to adjust the
LNB’s skew setting.
2
54-0147 Addendum to Rev. K
Ideal Skew Good Skew Bad Skew
= Satellite Signal = LNB "Signal Collector"
Figure 1
How Skew Works
Figure 2
LNB Can Be Rotated to Adjust Skew