MIL-DTL-38449D
TABLE III. Functional test Continued.
Test
Control or Switch Positions
Observations 1/ 2/
FALSE OPERATION
Insulate amplifier from bench ground.
Observe and measure the
Adjust supply 30 ±0. -.5V with unit in
voltage across lamp G to be
RESET condition operate S9.
greater than 20 dc
Actuate S13 and measure and record the
Current draw shall not exceed
no-load of READY, CONTACT, and
150 milliamperes for either
CURRENT
DISCONNECT current consumption of
relay position (classes 1 and 2);
CONSUMPTION
the unit at room temperature unless
175 milliamperes (classes 3
otherwise specified. Adjust the supply
and 4)
voltage to 18 +.5, -0V and hold for 2
seconds minimum
Repeat for a supply voltage of 30 +0, -.5V
TRANSMITTER TEST
See 4.4.6.3.1.
See 3.5.1.6.
(Classes 3 and 4)
RECEIVER TEST
See 4.4.6.3.2.
See 3.5.1.7.
(Classes 3 and 4)
INTERCOM LOADING
See 4.4.6.3.3.
See 3.5.1.3.
(Classes 3 and 4)
Lamp I does not come ON when testing a class 3 or 4 unit.
1/
2/
Lamp J does not exist for class 4 units.
4.4 Inspection methods.
4.4.1 Examination of product. Each amplifier shall be subjected to inspection for dimensional
requirements as shown on Figure 1 and shall be examined to determine conformance to the
requirements of this specification with respect to materials, design, interchangeability, weight,
finish, identification, workmanship, construction, and the electrical receptacle. The above shall
be noted and. recorded.
4.4.2 Dielectric strength. The dielectric strength test shall be conducted prior to, sealing the
unit. The ground connection between the case of the unit and circuit ground (Pin B/2), including
radio frequency interference bypass components if applicable, shall be opened. One thousand
volts ac, 60 Hz shall be applied between all pins (tied together) and the case of the unit for a
period of 1 minute. Evidence of breakdown, arc-over, or current flow that is transient,
fluctuating, steadily increasing, or evidence of leakage current of 500 microamperes or more
shall constitute failure.
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