3: Operation
PRC1077-MSOP 3-3
Channel Knob The Channel knob sets the transmit and receive frequency.
Tuning Knobs The two Tuning knobs adjust the preset channel frequencies (1 to 9) or the
manual (MAN) channel.
CHAN SET
Button
The CHAN SET button works in conjunction with the Tuning knobs to
change the preset channel frequencies.
LCD Display The LCD displays the selected channel frequency in MHz and kHz.
Volume The VOLUME knob sets the audio level for received signals (0 to 10).
Connectors Connectors provide connections for handsets and antennas.
Position Description
MAN Manual tune channel
1 to 9 Preset channels
Position Description
UP Increments frequency higher in 1 MHz steps. Lever is
spring-loaded.
DOWN Increments frequency lower in 1 MHz steps. Lever is
spring-loaded.
UP Increments frequency higher in 25 kHz steps. Lever is
spring-loaded.
DOWN Increments frequency lower in 25 kHz steps. Lever is
spring-loaded.
Position Description
Pressed Allows the preset channel frequencies to be changed with
the Tuning knobs.
Released Prevents the preset channel frequencies from being
accidentally changed.
Connector Function/Action
AUDIO Provides connection for handset or retransmission cable to
transceiver.
ANT Provides connection for AT-271A/U or AT-892/U antenna.
ANT (BNC) Provides connection for a fixed base or vehicular antenna.
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