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26
RECEIVE AND TRANSMIT
Operating SSB
q Push a band key to select the desired band.
w Push [SSB] to select LSB or USB.
Below 10 MHz LSB is automatically selected; above
10 MHz USB is automatically selected.
e Rotate [AF] to set audio to a comfortable listening
level.
r Rotate the tuning dial to tune a desired signal.
S-meter indicates received signal strength.
t Push [TRANSMIT] or [PTT] (microphone) to trans-
mit.
The TX indicator lights red.
y Speak into the microphone at your normal voice
level.
Adjust [MIC GAIN] at this step, if necessary.
u Push [TRANSMIT] or release [PTT] (microphone) to
return to receive.
Band keys[TX] indicator[TRANSMIT]
[MIC GAIN] [SSB] Tuning dial
LSB or USB appears
DD
Convenient functions for receive
Preamp and attenuator (p. 47)
Push [P.AMP/ATT] several times to set the pre-
amp OFF, preamp 1 ON or preamp 2 ON.
•“P.AMP1, P.AMP2 or P.AMP appears when the
preamp 1, preamp 2 or preamp is set to ON, respec-
tively. (depending on operating frequency band)
Push [P.AMP/ATT] for 1 sec. to set the attenuator
ON.
Push [P.AMP/ATT] momentarily to turn the attenuator
OFF.
•“ATT appears when the attenuator is set to ON.
Noise blanker (p. 50)
Push [NB] to turn the noise blanker ON and OFF.
•“NB appears when the noise blanker is set to ON.
Push [NB] for 1 sec. to enter noise blanker set mode.
Noise reduction (p. 52)
Push [NR] to turn the noise reduction ON and OFF.
Rotate [NR] control to adjust the noise reduction level.
•“NR appears when the noise reduction is set to ON.
Auto notch lter (p. 52)
Push [A/NOTCH] to turn the auto or manual
notch function ON and OFF.
Rotate [NOTCH] control to set the attenuating fre-
quency for manual notch operation.
Twin PBT (passband tuning) (p. 51)
Rotate [TWIN PBT] controls (inner/outer).
Push [PBTC] to clear the settings.
AGC (auto gain control) (p. 48)
While M1 is selected with [MENU], push
[F1 AGC] several times to select AGC F,
AGC M, AGC S or AGC OFF.
VSC (voice squelch control) (p. 53)
While M2 is selected with [MENU], push
[F5 VSC] to turn the VSC function ON and OFF.
The VSC indicator appears when the voice squelch
function is set to ON.
DD
Convenient functions for transmit
Speech compressor (p. 57)
While M1 is selected with [MENU], push
[F3 CMP] to turn the speech compressor ON and
OFF.
•“COMP appears when the speech compressor is set
to ON.
VOX (voice operated transmit) (p. 54)
Push [VOX/BK-IN] to turn the VOX function ON
and OFF.
•“VOX appears when the VOX function is set to ON.
Transmit quality monitor (p. 56)
Push [MONITOR] to turn the monitor function ON
and OFF.
•“MONI appears when the monitor function is set to
ON.
Audio tone control (p. 88)
While M2 is selected with [MENU], push [F4
TCN], select an item with [F1 ] and [F2 ] then
rotate the tuning dial to adjust the audio tone.
IC-7400.qxd 02.4.2 11:35 Page 26
39


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