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MIL-STD-188-311

1971 Edition, December 10, 1971

Complete Document

TECHNICAL DESIGN STANDARDS FOR FREQUENCY DIVISION MULTIPLEXERS

Includes all amendments and changes through Cancellation Notice 2, April 15, 1997


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Description / Abstract:

This standard sets forth the electrical performance requirements for Frequency Division Multiplexer (FDM) equipment accepted by the Government for use in the Defense Communications System (DCS) and semi-fixed tactical service. It is intended to define the interface levels at interconnection points to and from local telephone facilities and to and from long distance communications trunks.

The multiplexer equipment may be confugured to combine from 12 to 612 lower sideband voice frequency (VF) channels for transmission over microwave radio relay, tropospheric scatter, and suitably equipped satellite communications levels along with LOS, troposcatter and wire line systems. The VF channels (0.3 kHz to 4 kHz nominal) shall be capable of handling voice, digital data, telegraph, facsimile, or other graphic information. Multiplex high frequency (HF) line outputs (HFDF) can be placed in the frequency spectrum between 12 and 2,540 kHz or parts thereof. The specific line position (frequency) and channel capacities can be configured by selecting the appropriate variable multiplexer groups within the multiplexer Equipment family. The multiplexer equipment is suitable for fixed plant, mobile and shipborne usage. Input power can be either 48 VDC or 115V, 50-60 Hz AC. MIL-STD-188-100 contains common Long Haul and Tactical Communications Systems Standards. In case of conflict, the standards in MIL-STD-188-100 shall govern.

Supersedes Page 1 of 10 December 1971.