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Mobile Installation Manual Page 85 of 93
4.14 Recognizing and Switching Left-Hand and Right-Hand Polarity
on Circular C-Band
Products Affected:
• iNetVu Platforms: 1800C
Description:
This article explains how to recognize and switch between left hand and right hand polarity on
circular C-Band Polarization Assemblies.
Required Materials:
• Allen Key Set
Solution(s):
1. The (RHCP or LHCP) mark on the Flange will line up with the mark at top center of OMT,
this identifies polarity setting on the polarizer.
2. To switch from Left-Hand to Right-Hand Polarity and Vice-Versa, the polarizer diplexer
must be rotated 90 degrees. The LNB orientation must stay in the same horizontal position.
To rotate the diplexer/polarizer, unscrew the 8 Allen screws attaching the polarizer flange
to the OMT, and the 8 at the feed horn end. Align markings on the flange with that on the
OMT by rotating the polarizer diplexer.
Fig. 71: Left Hand Circular Polarization
Note: Polarization indicated is the
polarization of the antenna system at
transmit. Receive polarization is opposite.
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