MIL-DTL-5815H
4.6.2.1.1 Sampling plan. Four sample units shall be selected every 6 months. Upon passing this inspection, the
supplier may select 4 sample units every 12 months. If the second level of sampling is passed two successive times,
the supplier may select 4 sample units every 24 months. In the event of a failure, sampling shall revert to the 6-
month interval.
4.6.2.1.2 Failure. If one or more sample units fail to pass group B inspection, the sample shall be considered to
have failed.
4.6.2.1.3 Disposition of sample units. Unless otherwise specified, sample units that have been subjected to group
B inspection shall not be delivered on the contract or purchase order.
4.6.2.1.4 Noncompliance. If a sample fails to pass group B inspection, the supplier shall 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, processes, etc., and which
are considered subject to the same failure. Acceptance of the product shall be discontinued until corrective action,
acceptable to the Government has been taken. After the corrective action has been taken, group B inspection shall
be repeated on additional sample units (all inspection, or the inspection which the original sample failed, at the option
of the Government). Group A inspection may be reinstituted, however, final acceptance shall be withheld until the
group B reinspection has shown that the corrective action was successful. In the event of failure after reinspection,
information concerning the failure and the corrective action taken shall be furnished to the cognizant inspection
activity and the approving activity.
TABLE V. Group B inspection.
Examination or test 1/
Requirement paragraph
Method paragraph
Radiation pattern
Polarization
Static load
Seal
Resistance to solvents
High temperature exposure 1/
Temperature shock
Barometric pressure (reduced)
Shock
Vibration
Dust
Moisture resistance
Salt atmosphere
1/ When specified (see 3.1).
4.7 Methods of examination and test.
4.7.1 Visual and mechanical examination. Antennas shall be examined to verify that materials, design,
construction, physical dimensions, finish, marking, and workmanship are in accordance with the applicable
4.7.2 Impedance (see 3.7). Impedance measurements shall be made with the antenna mounted at the center of
an 8-foot circular ground plane. The long axis of the antenna blade shall be perpendicular to the ground plane. A
network analyzer or a slotted-line method may be used for the measurements. The slotted line shall be equipped
with a tunable RF probe covering the appropriate frequency range. The impedance of the antenna shall be
measured and recorded over the frequency range (see 3.1) at intervals no greater than 25 MHz. (Sweep frequency
techniques may be used). The cable length between the antenna and the measuring equipment shall be no greater
than six feet. Impedance measurements of the antenna shall be made after environmental tests as well as
temperature extremes.
4.7.3 Sampling probe impedance (see 3.8). The impedance of the sampling probe shall be measured in
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