MIL-PRF-55339C
4.5.10 RF leakage (see 3.13). The mating adapter pair to be tested shall be assembled as shown
on figure 2 and tested as shown on figure 3. The brass tubing shall be machined to attach to the
hermaphroditic cable connectors. This test setup between 500 MHz and 11 GHz, shall have a
dynamic range from 20 dBm to better than 100 dBm or a difference of 90 dB. Using +20 dBm RF
source with 10 dB isolation, an additional 30dB range can be obtained by use of attenuator pads or a
step attenuator producing a total range of 120 dB. The shorting plunger is adjusted to produce a
maximum reading in the detector with the triaxial assembly inserted. To check the residual RF
leakage of the standard test connectors, the following three-step checkout procedure shall be
performed:
Step 1 Items 1 and 2 on figure 4 shall be inserted in the triaxial assembly. The RF
leakage at the frequency of interest of this combination shall be measured.
Step 2 Items 1, 3, 4, and 2 shall be inserted in the triaxial assembly as shown on figure 4,
and the RF leakage shall be measured.
Step 3 Items 1, 6, 5, and 2 shall be inserted in the triaxial assembly, and the RF leakage
shall be measured.
To perform the measurement on the adapter under test, items 1, 3, 7, 5, and 2 on figure 4 shall be
inserted in the triaxial assembly and the total RF leakage of the adapter at both its interfaces shall be
measured.
FIGURE 2. Triaxial test assembly for RF leakage.
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