MIL-T-48593B (AR)
3.3.3
Altitude.
3.3.3.1 Operating. The test set shall meet the requirements
of 3.4 and 3.5 during and after exposure to barometric pressure
encountered at 10,000 feet above sea level (20.6 inches of Hg).
3.3.3.2 Non-o perating. The test set shall meet the require-
ments of 3.4 and 3.5 after exposure for not less than 10 minutes to
barometric pressure encountered at 40,000 feet above sea level (5.5
inches of Hg).
3.3.4
Temperature.
3.3.4.1 Operating. The test set shall meet the requirements
of 3.4 and 3.5 when stabilized thermally at any temperature between
+32°F and +131°F.
3.3.4.2 Non-operating (storage). The test set shall not
suffer permanent damage when subjected to the constant temperature
extremes of -60°F for a period of 24 hours and +160°F for a period
of 4 hours (after temperature stabilization), and shall meet the
requirements of 3.4 and 3.5 when returned to room ambient.
3.3.5 Humidity (non-o perating]
The test set shall meet the
requirements of 3.4 and 3.5 after exposure to an atmosphere with a
relative humidity in excess of 95 percent for a period of 10 days.
3.4 Electrical. The circuitry shall be in accordance with
electrical schematic drawing 11747105 and wire runs list 11747106.
The wiring list shall take precedence over the schematic. The
symbols referenced in subsequent paragraphs pertain to this
schematic and are used therein.
3.5
Performance.
3.5.1 Conditions of operation. Unless otherwise specified,
the requirements of 3.5 shall be met with the conditions shown in
Figure 1. Printed circuit board assemblies 11747101, 10548359, and
10548330 shall be removed for tests covered by 3.5.2 to 3.5.7.
Printed circuit board assemblies shall be re-inserted for tests
covered by 3.5.8 to 3.5.12.
4.
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