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MIL-D-23222A(AS)
INTERCOMMUNICATION SYSTEM. - The contractor shall
3.14.1.2
demonstrate that the intercommunication system
meets the requirements of all applicable specifications, and performs
satisfactorily over the entire mission capability of the helicopter.
TEMPERATURE AND VIBRATION. - The contractor shall
3.14.1.3
demonstrate that the ambient temperature and vibra-
tion requirements in all compartments containing or with previsions
to contain electronic equipment, do not exceed values specified in
the specification requirements stated in the procurement documents for
the individual equipment items. When not otherwise specified, the
limits defined in Spec MIL-E-5400 shall apply.
(CONDENSATION. - The contractor shall demonstrate
3.14.1.3.2
that air ducts to equipment are free of moisture
after flights so that the proper operation of water separation, etc.
is indicated. Any free mositure found inside equipment whether forced
air cooled or not shall be reported. Equipment failures, either per-
manent or temporary in nature, resulting from moisture or high
humidity shall be investigated and reported.
ANTENNAS. - The contractor shall demonstrate that
3.14.1.4
the antennas as installed on the helicopter meet
the requirements of Spec MIL-STD-877, and the specifications for the
individual electronic equipment. The results of laboratory tests on
mock-up and scale model radiation measurements shall be furnished for
approval of the basic antenna design as early as possible. Flight
demonstrations to substantiate model radiation patterns and other
laboratory results shall be performed under conditions designed to
prove the capability of the electronics system to fulfill the require-
ments of the helicopter mission. The demonstration shall show that:
(1) The azimuth and elevation coverage of antennas of
the various configurations of the helicopter at
the required frequencies, is satisfactory in
accordance with the laboratory results.
(2) The gain of the antennas, with reference to the
isotropic radiator, is adequate for accomplishment
of the mission.
(3) Isolation between antennas and between electronics
systems using a common antenna is such that no
significant or unreasonable impairment of the
operation of either system results.
86

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