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MIL-N-81207A(AS)
Blower Power - Provisions shall be made to
3.3.12.3
supply up to 1.5 amperes at 115 VAC, 400 Hz, to power an external
cooling air source when the equipment is energized.
Degraded Performance - Degraded performance
3.3.12.4
will be permitted for voltage transients not exceeding 0.5 second
during normal electric system operation.  Operation shall return
to normal with no resulting damage to the equipment.
Cooling - The equipment shall operate
3.3.13
satisfactorily when supplied with cooling air from the internal
blower and aircraft supplied conditioned air as described in
Figure 1.
Acoustic Noise - No malfunction of the
3.3.14
equipment shall occur when subjected to a noise of 120 dB relative
to 0.0002 dyne per square centimeter at frequencies between 20 and
10,000 Hz.
Performance - Unless otherwise specified,
3.4
values set forth to extablish the requirements for satisfactory
performance apply to performance under both standard and extreme
service conditions.  When reduced performance under the extreme
conditions is acceptable, tolerances or values setting forth
acceptable variations from the performance under the standard
conditions will be specified.
Operation - The equipment, when properly
3.4.1
transmit to and receive from an aircraft with
interconnected shall
an AN/ARN-21, AN/ARN-52(V), AN/ARN-72, AN/ARN-84(V) , AN/ARN-90, or
AN/ARN-91 TACAN Set installed, or from a complementary navigation
beacon, a combination of pulsed signals from which it shall derive
and process the information necessary to perform the functions as
described in Table I.  Furthermore, the equipment, independently
of the signals received from the beacon or complementary aircraft,
shall provide a blanking pulse output during the time of its own
transmission in the TRANSMIT-RECEIVE and AIR-TO-AIR modes which
will cause blanking of other equipment operating in the same
frequency band.
Characteristics of Received TACAN Si gnals -
3.4.2
This equipment shall operate and provide the accuracy requirements
specified herein when receiving pulse code and pulse amplitude
type signals of a surface or air facility conforming to MIL-STD-
291 and in addition the following:
12.

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