| 摘要 |
A communication device wherein leader pulses which continue for a predetermined time period are transmitted prior to the transmission of data from its transmitter; its receiver is rendered intermittently operative at a cycle shorter than half the continuation time of said leader pulses by means of a cycle operation controlling means to thereby become operative for a short time at a duty lower than 1/10; while the receiver is operating, it is detected by a detector means whether or not the leader pulses are transmitted; and when the transmission of the leader pulses is detected by the detector means, the receiver is kept operative for a predetermined time period by an operation holder means.
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