Note: The following test procedures should not be used to test the performance of new equipment; that is,
equipment that has not been repaired or rebuilt. Such equipment should be tested for conformance with the
electrical and operational specifications given in the contract under which the equipment was manufactured,
including any waivers and/or changes to the equipment that were imposed on or granted to the particular
manufacturer of the equipment.
Technical publications applicable to the AS-1425/GRC are listed in Appendix A. Applicable procedures
and general standards of the Signal Corps depots performing these tests form a part of the requirement for testing this
Perform all applicable modification work orders (MWO's) pertaining to the equipment before performing
the test procedures. DA Pam 310-1 lists all current MWO's.
Test Equipment Required.
The following test equipment is required for depot testing Antenna AS-1425/GRC.
Radio Frequency Cable Assembly CG-409C/U (4 ft 3 in.)
Standing Wave Ratio Indicator AN/USM-37E
Slotted Line IM-( )/USM-37E G233 (77327)
Physical and Deicer Tests.
. Visually examine the reflector, feedhorn, backmount, antenna adapter, guys, clamp
assemblies, cable hangers, and waveguide assemblies. There should be no signs of dents, scratches, or physical
distortion of any parts.
A tension of not more than 10 pounds should be required to operate the tilting assembly at any angle
throughout its range of from -8 to +8 No restraining force on the rope should be required at any setting. The rope
should not slip on the pulley when pulled in either direction.
Hang a 12-pound weight 24 inches from the junction of the feedhorn and its mounting flange. After 5
minutes, the feedhorn should not be displaced by more than l-/4 inch from its original position.