Beacon Mode

constantly monitor the frequencies set into the front panel rotary select switches which are programmed into the receiver

by the FREQ SELECTION lines. When a transmission is detected on one of the preset frequencies, the scan stops. The

receiver then monitors the detected frequency and passes the received signal through the RCV AUDIO line to the

speaker or handset earphone. After the message is finished, the receiver again scans the selected frequencies for

another incoming message.

1-21. Beacon Mode

This is an automatic mode in which the radio transmits a continuous signal tone on a frequency that is set by the

operator. The operator cannot transmit or receive voice messages while in the beacon mode of operation. In this mode,

the front panel BEACON switch is turned on, enabling the transmitter circuits through the XMT AUDIO line. The

frequency of transmission is programmed into the transmitter by the signal on the FREQ SELECTION line. Placing the

radio in the beacon mode automatically turns the transmit/receive switch to transmit so that the beacon tone passes to

the UHF/VHF switch. Selection of a UHF or VHF beacon frequency automatically switches the UHF/VHF switch so that

the signal is routed to and transmitted by the proper antenna.

1-21