MIL-PRF-49204B(CR)
3.8 Service Conditions. As a result of being subjected to the
following environmental conditions, according to the methods set forth in the
test schedules, the antenna system shall not exhibit any effect which would be
harmful to performance or reliability. The parts of the system shall not be
deformed, defaced, frayed in any manner or exhibit evidence of corrosion.
Corrosion is any visible degradation that can be attributed to flaky, pitted,
blistered or otherwise loosened finish or metal surface. Harmful electrical
performance is performance below the test limits stated herein. (see 4.14)
3.8.1
Temperature.
3.8.1.1
High Temperature.
(see 4.14.1)
3.8.1.1.1 Operating. The antenna system shall be operable without
degradation in specified performance and shall sustain no physical
deterioration, at ambient air temperature as high as +710C (+1600F). This
includes effects of solar radiation at a rate of 360 BTU/ft x ft/hr.
3.8.1.1.2 Storage and Transportation. The antenna system shall
withstand exposure to ambient temperatures as high as +710C (+1600F).
3.8.1.2
Low Temperatures.
(see 4.14.2)
3.8.1.2.1 Operating. The antenna system shall be operable without
degradation in specified performance and shall sustain on physical
deterioration at ambient air temperatures as low as -45.60C (-500F).
3.8.1.2.2 Storage and Transportation. The Antenna system shall
withstand exposure to ambient temperature as low as -570C(-700F).
3.8.2 Humidity. The antenna system shall be operable without
degradation in specified performance and shall sustain no harmful physical
deterioration, during and after prolonged exposure to extreme high humidity
levels encountered in tropical areas. (see 4.14.3)
3.8.3 Fungus. The antenna system shall show no evidence of viable
fungus or corrosion when subjected to environmental conditions which would be
favorable to their development, namely high humidity, warm atmosphere, and
presence of inorganic salts.
3.8.4 Salt Fog. The antenna system shall be capable of operation for
extended periods in the saline atmospheres of a seacoast environment without
harmful structural deterioration, without degradation in specified
performance, without insulator breakdown and without electrical flashover.
(see 4.11.2)
3.8.5 Dust. The antenna system shall be capable of operating for
extended periods in a dry, windy (17 knots), sandy environment without harmful
structural deterioration, without degradation in specified performance,
without insulator breakdown and without electrical flashover. (see 4.11.3)
3.8.6 Bounce, Loose Cargo. The antenna system, disassembled and stowed
in its bag, shall be capable of withstanding shocks and exposure to wear
induced during field transport as loose cargo. Some wear to the bag is
expected as a result of the test of 4.11.5. However, the bag shall not be
frayed or torn to the extent that it ceases to perform its function of
containing and protecting its contents.
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