Burst serial tone waveform signaling method and device for squel

Details Burst serial tone waveform signaling method and device for squel Burst serial tone waveform signaling method and device for squel

1994-09-01

1999-03-09

Chin, Wellington

Pulse or digital communications

Apparatus convertible to analog

Muting circuit and squelch

455 361, 455212, 455218, 455343, 370311, H04B 110

Patent

active

058811010

ABSTRACT:
A device and method for controlling HF single side band radio squelch operation in which a serial tone burst indicates the start and end of a transmission and identifies an on-going transmission. Additionally, receivers in a power saving sleep mode can be activated by receipt of a set of serial tone bursts that have been transmitted with sufficient duration for the receiver to be assured the opportunity to detect them. During the subsequent transmission of information, single "keep-alive" serial tone bursts are transmitted at random time intervals. The end of a transmission is signalled by another set of serial tone bursts. The bursts are provided with the transmitted signal on its frequency and preserve signal bandwidth.

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