Tabulated Data

TM 11-5985-335-15

1-5.

Tabulated Data

The tabulated data of Antenna AS-1425/GRC is given below:

Type

........................................................ Parabolic reflector with horn feed.

Operating frequency ................................... 4.4 to 5.0 GHz.

Polarization (E-plane) ................................. Vertical or horizontal (manually selectable at time of installation).

Gain (nominal over 4.4 to

5.0 GHz range ............................................. 33 db minimum.

Beam width (at 3-db points):

Horizontal polarization ........................... 3.5°±0.5° in the vertical plane.

3.5°±0.5°in the horizontal plane.

Vertical polarization .............................. 3.5°±0.5°in the vertical plane.

3.5°±0.5°in the horizontal plane.

Weight ........................................................ 65 pounds, including backmount and deicer equipment.

Deicer equipment ........................................ Remotely controlled electric heater mounted on feedhorn assembly.

1-5.1.

Differences Between Configurations

Earlier antennas have an antenna adapter and a clamping arrangement to facilitate mounting the antenna on a mast.

Newer antennas and field replacements of old antennas will have a quick-release pin holding antenna to mast.

Illustrations and descriptive paragraphs in this manual reflect both configurations. Older antennas, with a serial number

without a suffix, are configuration A. Newer antennas, configuration B, will have a serial number with a "C" suffix.

Illustrations and descriptions in the text that pertain to only one or the other configuration are marked (A) or (B) to denote

the applicable configuration. Illustrations and descriptions not so marked pertain to all antennas.

1-6.

Components of Antenna AS-1425/GRC

a. For a current listing of components of Antenna AS-1425/GRC, refer to the basic issue items list (appx B). The

chart below lists the major items of equipment comprising the AS-1425/GRC.

Change 2

10.1