MIL-DTL-28781 Cable, Electrical, Special Purpose Shore UseThis specification describes twisted-pair, multiconductor, shielded cables for use within shore communication stations and facilities.

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MIL-DTL-28781E

tested in accordance with FED-STD-228, method 3021, or ASTM-D470. The cable jacket elongation

shall be tested in accordance with FED-STD-228, method 3031, or ASTM-D470.

4.6.6 Dielectric test. The cable shall be subjected to the dielectric test as specified in method 6111

4.6.7 Resistance test. The resistance of the conductors and shield shall be measured as specified in

method 6031 of FED-STD-228.

4.6.8 Joining conductors test. The tensile strength of any section of a conductor joint that was

brazed or welded shall be tested to determine conformance to 3.2.1.1.

4.6.9 Crosstalk loss test. The rms crosstalk loss calculation shall be based on the combined total of

all adjacent and alternate pair combinations within the same layer and center-to-first layer pair

combinations. The rms crosstalk loss is the number of dB corresponding to the rms crosstalk voltage

ratio. If the crosstalk loss is Ko dB at a frequency of fo for a length Lo, it can be determined for any other

length L or frequency f by:

K f loss = K o - 20 log10

- 10 log10

4.6.10 Jacket hardness test. Samples of the conductor jacket shall be tested for hardness in

accordance with ASTM-D2240.

4.6.11 Continuity test. Test continuity of all conductors with a low dc voltage and an appropriate

indicating meter. Using a minimum test voltage of 100 V dc, test each conductor individually to verify that

each conductor is free of any contact with the shield or any of the other conductors that may be bunched

together.

4.6.12 Heat resistance and solder shrinkage. Heat resistance and solder shrinkage tests of

MIL-DTL-16878 shall be performed on the finished insulated conductor.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the

contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor

personnel, these personnel need to contact the responsible packaging activity to ascertain packaging

requirements. Packaging requirements are maintained by the Inventory Control Point's packaging

activities within the Military Service or Defense Agency, or within the military service's system commands.

Packaging data retrieval is available from the managing Military Department's or Defense Agency's

automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.