MIL-DTL-55235A
4.7.6 Coupling sleeve rotation. A torque shall be applied to the coupling sleeve about the axis of
symmetry. The torque shall be measured with a 0 to 2 inch-pound torque wrench (see 3.5).
4.7.7 Cable retention. Connectors assembled to their appropriate cables shall be subjected for one
minute to an axial force of 45 pounds pulling the connector away from the cable (see 3.6).
4.7.8 Form over. A withdrawal force of 100 pounds shall be applied wherever a form over exists.
The pull shall be made for one minute along the longitudinal axis of the two joined parts (see 3.7).
4.7.9 Voltage standing wave ratio. The voltage standing wave ratio of the connectors, mated and
assembled to their appropriate cables, and adapters mated to a plug or jack, as applicable, assembled to
it's appropriate cable, with respect to a matched 50 Ohm system, shall be measured as follows (or any
other method approved by the preparing activity), at increments of 1 GHz, in the range of frequencies
from 1 GHz to 10 GHz, as shown in the block diagram:
(a)
A long length of cable associated for connector use shall be assembled to the adapter.
The length shall be adequate when shorting the far end of the cable does not shift the
minimum of the standing wave. The connector assembly to be tested shall not be included
in the initial calibration.
(b)
At each frequency that the VSWR is to measured, the double stub tuner shall be set and
locked so that the VSWR recorded on the standing wave indicator is 1.01 :1 or better.
(c)
The cable shall be cut at a short distance from the adapter and a connector pair shall be
inserted such that the insertion loss of the cable between the adapter and the connector
pair is negligible.
(d)
At each frequency, the proper pre-tuned stub tuner shall be inserted for that frequency.
The VSWR reading obtained on the standing wave indicator shall be the cable-to-cable
VSWR of the connector assembly
5
Long length cable
1
2
3
4
6
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1
2
3
4
6
8
1.
RF Signal Source
5.
Standing Wave Indicator
2.
Frequency Meter
6.
Double Stub Tuner
3.
10 dB attenuator pad
7.
Transition to cable (when applicable)
4.
Slotted Section
8.
Connector Pair under test
13
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