Frequency-change signaling

In telecommunications, 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.

Source: Wikipedia — Frequency-change signaling (CC BY-SA 4.0)

Frequency-change signaling

In telecommunications, 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.

Source: Wikipedia "Frequency-change signaling" · CC BY-SA 4.0

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