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|  MIL-F-21572(Wep)
3.2.7 Interference Control- The generation of radio interference by the equipment and
the vulnerability of the equipment to radio interference shall be controlled within the limits
of Specification MIL-I-6181.
.
3.2.8 Maintenance Provisions and Field Testing - Provisions for maintenance shall be
as specified in Specification MIL-E-54 00. Specific test points and test facilities shall be pro-
vided to the greatest extent practicable for ease of field testing and maintenance.
3.2.9 Nomenclature and Nameplates - Nomenclature assignment and nameplate approval
for equipment identification shall b e in accordance with Specification MIL-N-18307.
3.2.10 Standard Conditions - The following conditions shall be used to establish normal
performance characteristics under standard conditions and for making laboratory bench tests.
Room ambient (30 10OC)
Temperature
Altitude
Normal ground
Vibration
None
Humidity
Room ambient up to 90% relative humidity
115 l.O VAC and/or 27.5 0.5 VDC
Input power voltage
3.2.11 Service Conditions - The equipment shall operate satisfactorily under any of
the environmental Service conditions or reasonable combination of these conditions as speci-
fied in Specification MIL-E-5400 for Class 1 equipment, except as modified herein. -
3.2.11.1 Vibration - The equipment shall operate satisfactorily when subjected to the
vibration requirements of Curves I and II of Specification MIL-E- 5400.
3.2.11.2 Temperature - The highest and lowest temperature conditions under which the
equipment shall operate shall be + 55C and -54C respectively.
.
3.2.11.3 Cycle of Operation - Instead of continuous and intermittent operation, the
equipment shall be operated according to the following applicable cycle.
(1) With high temperatures and normal ground altitude:
30 minutes on standby (tube heaters. energized)
15 minutes on full power (all channels operating)
15 minutes off (not considered as operating time)
Three cycles required
(2) With low temperatures and high-altitude pressures:
30 minutes on standby (tube heaters (energized)
5 minutes on full power (all channels operating)
5 minutes on standby
5 minutes on full power
5 minutes on standby
5 minutes on full power
Off
3.2.12 Warm-up Time - The time required for the equipment to warm-up prior to opera-
tions shall be kept to a minimum and shall not exceed 3 minutes under standard conditions and
15 minutes at extreme service conditions.
3.2.13 Input Power Requirements - The equipment shall meet all applicable requirements
of Specification MIL-STD- 704 and sha11 give specified performance when provided with power
from the following sources with characteristics as defined in MIL-STD-704. The power re-
quired shall not exceed the amounts shown:
AUTHORIZED 21572 (WEP)
(1) 115/200V 3 AC Category "C" 180.5 1 dtd 9 June 1964
T- INV. 00 6
NSD PHILA., PA
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