AN/FRC-80(V)3 retune and time division multiplex interface investigation

Joseph E. Farrow

Abstract: An analog FM microwave radio was tuned and tested to published specifications. Appropriate interface changes were determined and made to permit this radio to handle a 12.6 Mb/s 3-level partial response digital baseband. Pilot, orderwire, and combiner operation were investigated. Bit error rate perfor­mance as a function of received signal level, orderwire sub­carrier frequency and deviation, and radio pilot level were investigated and reported. The radiated spectra for several variations of the above parameters are included.

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