Yaesu FT-223 Instruction Manual page 11

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1.
VOLUME Control
2.
SQUELCH (SQL) Control
3.
CHANNEL Selector
4.
CHANNEL Indicator
5.
CALL Switch
6.
HI-LOW Switch
7.
Microphone Receptacle
8.
IND I CA TORS - ON AIR
CALL
LOW
BUSY
The VOLUME control adjusts
the receiver audio output level
(applies power when pushed in).
The SQUELCH control adjusts the
receiver squelch threshold sensitivity.
An optional tone squelch circuit
is activated when rotated to the
extreme CCW position marked TONE.
The 23 position CHANNEL selector
switch selects the desired qperating
channel.
The channel indicator shows the
selected operating channel (illuminated
when power is applied).
When depressed, the CALL switch
selects a preset channel regardless
of the CHANNEL selector switch
position and CALL lamp lights up.
The HI-LOW switch selects the
desired power output, 10 watts in
HI position, or 1 watt in LOW position.
In LOW position, LOW lamp lights up.
Four-pin connector is used for
microphone input and push-to -talk
relay actuation.
The red lamp lights up in the
irtransmit'' mode.
The red lamp lights up when the
CALL channel is selected.
The red lamp lights up when the
transceiver is operated at LOW power.
The red lamp lights up when the
signal is received.
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