Polarization
Adjustment
Step 1
Step 2
Step 3
Step 4
Connect receive LNA output to spectrum analyzer and fine adjust elevation and azimuth strut lengths to achieve maximum signal strength from desired satellite.
Loosen four 3/8 x ½ in. set screws in feed support until feed assembly is free to rotate and adjust feed for maximum receive signal strength on desire polarization.
Note: Do not loosen collar hardware (P/N 49795). Collar will maintain appropriate feed window to center pad dimension during polarization adjustment.
Rotate feed assembly in one direction until signal level drops 1 dB. Mark this position. Rotate feed in opposite direction through maximum signal until signal level again drops 1 dB. Mark this position.
Adjust feed assembly to midpoint of 1 dB marks and securely tighten four 3/8 x ½ in. set screws in feed support making sure feed support is firmly seated against collar.
You have now completed the feed installation for your Earth Station Antenna. Refer to the appropriate section for the calculations necessary for antenna pointing.
66 | Installation Procedures |