37
4 Installing an ODU
The AIM guides you through the steps for aligning and performing follow-up
Extended Installation Verification (EIV) for each ODU.
Aligning the ODU
The tasks for aligning an ODU vary depending on the type of ODU. All ODU types
require coarse adjustments to be made in the azimuth and elevation directions. The
95° ODU also requires an adjustment in the tilt direction. To make coarse
adjustments, move the ODU in the appropriate direction and use the AIM to
determine the position that obtains the maximum possible signal power.
Slimline ODUs require fine adjustments (dithering) to be performed in the azimuth
and elevation directions to further hone the signal power. To dither, rotate the fine
adjustment jack screws to:
obtain a “reference” signal power on one side of the beam peak
obtain the identical strength on the other side of the beam peak
split the difference between the two reference points to obtain the obtain the
maximum signal power for all applicable orbital slots.
The AIM guides you through the dithering process using a series of audible tones to
notify you when the reference values have been obtained.
Important: The DIRECTV training materials are the primary source of ODU
installation instruction. Those documents supersede the instructions in this manual.
To Next Page
Loading...
Need help?
General
