MIL-DTL-23971D
4.6.1.3.2 Group B Rejected items. If an inspection lot is rejected, the contractor may rework it to correct the
defects, or screen out the defective units, and resubmit for reinspection. Such lots shall be separate from new lots,
and shall be clearly identified as reinspected lots.
4.6.1.3.3 Disposition of sample units. Sample items which have been subjected to group B inspection shall not be
delivered on the contract.
4.6.1.3.4 Noncompliance. If a sample fails to pass group B inspection, the manufacturer shall notify the acquiring
activity of such failure and take corrective action on the materials or processes, or both, as warranted, and on all units
of product which can be corrected and which were manufactured under essentially the same conditions with
essentially the same materials and processes, and which are considered subject to the same failure. Acceptance
and shipment of product shall be discontinued until corrective action, acceptable to the acquiring activity, has been
taken. After the corrective action has been taken, group B inspection shall be repeated on additional sample units (all
inspections, or the inspection which the original sample failed, at the option of the acquiring activity. Group A
inspection may be reinstated; however, final acceptance and shipment shall be withheld until the group B
re-inspection has shown that the corrective action was successful. In the event of failure after re-inspection,
information concerning the failure and the corrective action taken shall be furnished to the cognizant acquiring activity
(see 6.4).
4.7 Methods of inspection.
4.7.1 Visual and mechanical inspection. The items shall be examined to verify that the material, design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements
4.7.2 Seal.
4.7.2.1 Hermetic seal (see 3.6.1.1). Hermetically sealed items shall be tested in accordance with MIL-STD-202,
method 112. The following apply:
a.
Test conditions letter: C.
b.
Procedure: III.
c.
Degree of leakage rate sensitivity (see 3.6.1.1).
4.7.2.2 O-ring, solder seal, or encapsulated or enclosed seal (see 3.6.1.2). O-ring seal, solder seal, or
encapsulated sealed items shall be tested in accordance with MIL-STD-202, method 104. The following applies:
a.
Test condition letter: B.
4.7.3 Average coupling (see 3.5.1). The average coupling of the item shall be determined by the sweep frequency
technique over the specified frequency range (see 3.1) using the test setup of figure 1 or equivalent. The nominal
coupling loss for each type of toroidal, stripline and micro-strip power divider shall be as follows:
Table VII. Nominal coupling loss values for toroidal, stripline and micro-strip power dividers.
Type of power divider
Nominal coupling loss (dB)
2-Way
3.01
Resistive Loaded 2-Way
6.0
3-Way
4.77
4-Way
6.02
6-Way
7.78
8-Way
9.03
12-Way
10.80
16-Way
12.04
24-Way
13.80
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