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Burst serial tone waveform signaling method and device for squelch/wake-up control of an HF transceiver

  • US 5,881,101 A
  • Filed: 09/01/1994
  • Issued: 03/09/1999
  • Est. Priority Date: 09/01/1994
  • Status: Expired due to Term
First Claim
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1. A method of activating a radio receiver that is in a low power consumption sleep mode so that the radio receiver can receive a signal and of determining whether to squelch an audio output from the radio receiver, the method comprising the steps of:

  • (a) providing a first serial tone based burst waveform to activate the radio receiver and to deactivate squelch;

    (b) providing plural second serial tone based burst waveforms at random times during reception of a signal for maintaining deactivated squelch; and

    (c) providing a third serial tone based burst waveform to indicate the end of a signal and to activate squelch.

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