Frequency-change signaling

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In telecommunication, frequency-change signaling is a telegraph signaling method in which one or more particular frequencies correspond to each desired signaling condition of a telegraph code. The transition from one set of frequencies to the other may be a continuous or a discontinuous change in the frequency or phase.[1]

See also[edit]


  1. ^ Rudolf F. Graf (1999). Modern Dictionary of Electronics. Newnes. ISBN 0-7506-9866-7. 

 This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).