MIL-DTL-55288E
Test
Paragraph
Free space VSWR
Power handling
Base assembly resonance test
The MX-6707/VRC shall be subjected to the test of 4.8.3 at 150°F and at -40°F to determine compliance with 3.8.3
except the 70 watt operation shall be for a 15 minute period at each temperature extreme and at one frequency in
each sub-band, and a dummy load shall be used in lieu of the antenna test chamber.
4.7.2 Humidity test (see 3.7.2). The Antenna AS-1729/VRC shall be tested in accordance with method 507,
induced procedure II of MIL-STD-810. Induced cycle 4 shall be used and the number of 24 hour cycles shall be 20.
The following exceptions shall apply:
a.
The equipment shall be removed from the humidity chamber for measurements which shall be made at
ambient temperature and humidity.
b.
The measurements shall be made as rapidly as possible after removal from the test chamber.
c.
The seal on the antenna base assembly shall be broken for all five cycles by removal of the MX-6707/VRC
matching unit case; however, the case shall also be subjected to the humidity cycles.
4.7.2.1 Performance. Measurements made and specified performance shall be as follows: The antenna shall
meet full specification performance before, during, and after the test cycles, except voltage standard wave testing
shall be performed only at steps 6 and 8.
Requirement
Test
Test
paragraph
paragraph
Base assembly antenna resonance
Free space VSWR
4.8.2.1
Whip antenna test
4.7.2.2 Failure. If any equipment fails to meet the performance specified in 4.7.2.1 during cycling, it shall be
realigned or readjusted once. If the equipment then fails to meet 4.7.2.1 or fails subsequently during cycling, it does
not pass the test. In addition, if the equipment fails to meet full specification requirements after condition, as specified
in 4.7.2.1, it does not pass the test.
4.7.3 Immersion test (see 3.7.3). The antenna AS-1729/VRC shall be tested in accordance with method 512,
procedure I, of MIL-STD-810.
4.7.4 Vibration.
4.7.4.1 Test for internal vibration (see 3.7.4.1). Internal vibration testing of the antenna base assembly shall be in
accordance with the following procedure:
a.
Secure the equipment directly to a vibration table that can be controlled within 10 percent of the specified
amplitude. To facilitate observation and measurement of amplitude of vibration, the equipment should be
tested, provided it is secured to the vibration table in a manner similar to that used to mount the Antenna
Base Assembly.
b.
Vibrate the equipment successively in each of three mutually perpendicular directions over the frequency
range of 10 to 55 cycles per second. The total excursion of the vibration shall be not less than .030 inch
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