| 摘要 |
<p>In the transceiver, a multiple function switch decoder includes means (135) for detecting actuation of the switch (120) and means for monitoring the status of the receiver (69). A timer (230) responsive to the monitoring means and detecting means establishes a pre-determined time interval following each switch actuation or each received message of predetermined type. When the switch is actuated during the time interval the transmitter (80) is enabled. When the switch is activated outside the time interval the receiver audio is activated so the user may monitor the channel. During the first switch actuation in any given time interval an encoder (100) is enabled. On subsequent switch actuations during the same time interval the encoder is inhibited. This allows a single switch to perform a plurality of transmitter and receiver functions. </p> |
