MIL-DTL-18793B
b.
Sample tests. Sample tests shall be conducted on one antenna selected from each lot of fifty or portion
thereof submitted for inspection. Samples shall be selected by the inspector and shall first have passed
the individual tests. Sample tests shall be more extensive than the individual tests and shall include any of
the tests listed under preproduction tests which are deemed necessary by the inspector in addition to the
following tests conducted in the order stated:
First:
The resistance test.
Second:
The radiation test.
Third:
The VSWR test.
Fourth:
The visual inspection test.
4.4.2 Rejection. The acquiring activity reserved the right to reject any materials which have not been subjected to
the required tests and found satisfactory.
4.5 Test methods and requirements.
4.5.1 Visual inspection test. The antenna shall be examined visually to determine that it is properly marked, that
the dimensions and construction are as specified, that the workmanship is satisfactory, and that it has not yielded or
4.5.2 Resistance test. The continuity of the circuit between the terminals of the antenna shall be assured by
measuring the dc resistance between the terminals in accordance with the best commercial practice. The dc
resistance between the terminals of the antenna shall not exceed 0.1 ohm.
4.5.3 Radiation test. The radiation test shall consist of connecting the antenna through a fifty foot length of
RG-21/U cable to a monitored signal source tuned to one frequency within the frequency range of the antenna and
observing the relative level of energy radiated from the antenna as indicated in the output meter of an RF receiving
device tuned to the same frequency as the signal source. The relative level of energy radiated from the antenna shall
not vary more than ten percent above or below the level of a model or value as supplied by the acquiring service for
this purpose.
4.5.4 VSWR. The VSWR shall be determined in accordance with the best commercial procedure when the
antenna is mounted centrally on and flush with the surface of a square ground plane not less than 10 feet on a side.
Measurements shall be made at 5 MHz intervals from 400 MHz to 480 MHz, inclusive. At all frequencies between
400 MHz and 480 MHz, the VSWR shall be equal to or less than 2.0 to 1.
4.5.5 Service conditions test. The service condition test shall be conducted in accordance with all of the
requirements of MIL-STD-810.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. The AS-333/AP antenna is intended for use with airborne receiving and transmitting equipment
in the frequency range from 400 to 480 MHz. A 50-ohm RF transmission line (such as RG-58/U is required between
the equipment and the antenna.)
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