Squelch/Wake up Control of RF Transceiver

摘要

A device and method for controlling HF signal side band radio squelch operation in which a serial tone burst indicates the start and end of a transmission. Additionally, receivers in a power saving sleep mode may 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, signal "keep-alive" serial tone bursts are transmitted at random time intervals.