Andrew operation and maintenance Specifications download pdf (Page 53)

Chapter 3 - Operation

42S315F 3-1

Chapter 3

Operation

3.1 General

With this elevation-over-azimuth mount, pointing the antenna is

accomplished by jogging the antenna in elevation and jogging antenna in

azimuth. The azimuth and elevation angles are first established

approximately by reference to the indicator provided for each axis, then

aligned precisely by peaking on a signal received from a satellite of known

position. In addition, the feed polarization and subreflector position are

adjusted on the basis of peak received signal.

3.2 Satellite Pointing Procedure

With the feed installed and the electronics operational, use the following

procedure for pointing at the desired satellite and peaking on the signal

using the motorized earth station antenna.

3.2.1 Elevation Pointing

a. Place a spirit level on the elevation frame. Adjust the elevation frame to

the 90-degree (zenith) position as indicated by the level, and adjust the

elevation position indicator to read 90 degrees.

b. Determine the required elevation angle.

c. Jog the elevation actuator in the extending direction until the desired

angle is reached.

3.2.2 Azimuth Pointing

a. Determine the required azimuth angle. (The zero mark on the azimuth

indicator corresponds to the foundation heading angle.)

b. Jog the azimuth actuator until the desired angle is reached. Initial

pointing of the antenna is now complete.

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Andrew operation and maintenance Specifications Page 53