MIL-DTL-83517A
4.5.12 Radio frequency (RF) transmission loss (see 3.15). The RF transmission loss shall be
measured in accordance with the following procedure or a method acceptable to the government. In the
event of dispute, the method outlined herein shall be used. Diagrams for the RF transmission loss
system check out and measurement procedures are shown on figure 2.
The samples shall be tested as shown on figure 2. This test set up is identical to the VSWR
measurement with an addition power detector, isolator and a power amplifier.
The test system is checked out as follows:
test frequency ranges.
Step
1
Systems VSWR shall be less than 1.02 + .004 frequency
(frequency measured in GHz)
2&3
Systems VSWR shall be as specified (see 3.1).
b. Check out power transmission per steps:
Step
4
Plot basic power reference curve on X-Y recorder.
5
Standard test adapter (back to back). The transmission loss shall not be
greater than specified (see 3.1) over the basic power reference
established in step 4.
6
Standard test fixture set. The transmission loss shall not be greater than
specified (see 3.1) over the basic power reference established in step 4.
7
Connector under test. Attach the appropriate precision adapter and
standard test fixture half to the connector under test. (Same
configuration as step 4 in VSWR (see 4.5.11) test method.)
The transmission loss shall be free of any loss spikes greater than 0.3
dB and shall not be greater than specified (see 3.1) over the basic power
reference established in step 4.
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