MIL-DTL-87104C
4.6.2.3.4.1 Accept-reject criteria (procedure III). If the RF insertion loss measurement traces vary from one to
another more than the value specified in the applicable detail specification, the coaxial assembly shall be considered
to have failed the insertion loss stability test.
4.6.2.3.5 Procedure IV (RF insertion loss for replaceable interface components). The replaceable interface
component shall be connected in the test system and measured for RF insertion loss over the required frequency test
range(s) specified in the applicable detail specification.
4.6.2.3.5.1 Accept-reject criteria (procedure IV). If the RF insertion loss for the replaceable interface is greater
than the value specified in the applicable detail specification for the specified frequency range, the replaceable
interface component shall be considered to have failed the test.
4.6.2.4 Corona-high potential test (see 3.5.1.5 and 3.5.1.6). The corona-high potential test shall determine the
ability of the coaxial assembly to meet the high potential requirements and to establish the corona extinction point.
4.6.2.4.1 Test setup.
4.6.2.4.1.1 Test equipment. A high voltage source, corona free-adapters, fault indicator, an oscilloscope, and
associated instrumentation shall be required.
4.6.2.4.1.2 Test conditions. This test shall be conducted under room ambient conditions (see 4.3.1.1) and as
specified herein.
4.6.2.4.2 Procedure.
a.
The test setup shall be energized without the test sample to insure that it is corona-free a minimum of 1,000
volts above the required test voltage (as specified in the detail specification) and does not breakdown
1,000 volts above the high potential test voltage (as specified in the detail specification).
b.
The coaxial assembly shall be inserted in the test setup with corona free mating connectors attached to
each end of the assembly. Sealant materials shall not be used in either the mating connectors or the
connectors on the assembly under test.
c.
The 60-cycle voltage shall be slowly raised from zero to the test voltage as specified in the applicable detail
specification as uniformly as possible, at a rate of approximately 500 volts per second, until initiation of
corona is observed on the oscilloscope. The voltage shall then be raised from the point of corona initiation
to the high potential voltage specified in the detail specification. The voltage shall then be slowly
decreased until corona is extinguished.
4.6.2.4.3 Accept-reject criteria (see 3.5.1.5 and 3.5.1.6). If the corona extinction level is equal to, or greater than
the value specified in the applicable detail specification, and no evidence of breakdown is indicated, the test sample
shall be considered to have passed the corona-high potential test.
4.6.2.5 Altitude compliance test (see 3.5.1.7). The altitude compliance test shall determine the ability of the
coaxial assembly to meet the high potential and corona requirements under the conditions specified herein.
4.6.2.5.1 Test setup.
4.6.2.5.1.1 Test equipment. A high voltage source, corona-free adapters, a fault indicator, an altitude chamber, an
oscilloscope, and associated instrumentation shall be required.
4.6.2.5.1.2 Test conditions. This test shall be conducted at room ambient temperatures (see 4.3.1.1) at the
maximum altitude specified for the assembly being tested (see 3.5.3.2).
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