Automatic ACP test Verify that the signal is still peaked by initiating an automatic ACP test. To initiate this test, select the automatic cross polarization test type. If the antenna passes the automatic ACP test and maintains signal strength within 3 points on the signal strength scale, it is pointed and ready to be registered.
If the antenna fails the automatic ACP test, follow these steps:
1.Initiate a manual ACP test.
2.When the test starts, make small, 1° or less changes in polarization while observing the transmitter isolation.
3.Peak the polarization to the highest possible transmitter isolation.
4.Tighten the polarization lockdown nuts.
5.If the antenna passes the manual test, stop the manual test and run the automatic ACP test again.
6.Check the signal strength.
If the antenna passes the automatic ACP test and maintains signal strength within 3 points on the signal strength scale, it is pointed and ready to be registered.
If the antenna passes the automatic ACP test, but the signal strength drops more than 3 points after the test, you must repeat the fine adjustments for azimuth and elevation:
1.Repeat the fine adjustments for both azimuth and elevation to maximize the signal strength.
2.Repeat the automatic ACP test.
3.Check the signal strength.
If the antenna passes the automatic ACP test and maintains signal strength within 3 points on the signal strength scale, it is pointed and ready to be registered.
If the antenna still does not meet both criteria, repeat very small polarization, azimuth, and elevation adjustments and ACP tests as many times as necessary until you have peaked the signal and the antenna passes the automatic ACP test and signal strength is maintained within 3 points.
Important: When you are finished pointing the antenna, lock down all pointing adjustments. All adjustment points are shown in Figure 48 on page 60.
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Chapter 7 • Pointing the antenna
