Yaesu FT-920, Operating Manual

Page: 22 / 98

FT-920 Operating Manual
20
(1) P
OWER
Switch
This latching-type switch turns the FT-920 on and
off. Push it once to turn the transceiver on, and press
it again to turn the power off.
(2) MOX Switch
This also is a latching-type switch, used to switch the
FT-920 manually into the transmit mode (instead of
using the microphone Push-To-Talk (PTT) switch, for
example). Press [MOX] once to activate the transmit
mode, and press it again to release the FT-920 back
into the receive mode.
Be sure to have an antenna or dummy
load connected to the transceiver when
this switch is pushed. Failure to do so may
cause damage to the transmitter’s final amplifier
stage.
(3) VOX Switch
This switch enables automatic voice-actuated trans-
mitter switching in the SSB, AM, and FM modes, as
well as “semi-break-in” CW. Press the [VOX] switch
once to activate VOX, and again to disable VOX (and
return to PTT operation).
(4) P
HONES
Jack
This ¼” 3-pin jack is used for connection of head-
phones. When a plug is inserted into this jack, the
internal/external speaker will be cut off. This jack is
optimized for use with 16
Ω
to 32
Ω
headphones,
and will accept either monaural or stereo headphone
types.
(5) K
EY
Jack
This ¼” 3-pin jack is used for connection of a CW
keyer paddle or a straight key. Use only a 3-pin (“ste-
reo”) plug in this jack; if you attempt to use a 2-pin
plug, a constant CW carrier will be sent out. The
pinout is shown on page 5.
(6) M
IC
Jack
This 8-pin connector accepts microphone input, as
well as providing PTT, ground, and scanning control
access. Proper microphone impedance is 500 ~ 600
Ω
.
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