40
4
RECEIVE AND TRANSMIT
2001 NEW
■
Operating AM
q
Push a band key to select the desired band.
w
Push [AM/FM] to select AM.
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.
• The default tuning step for AM mode is 1 kHz; this can
be changed using the tuning step program mode. (p. 21)
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]
[AM/FM] Tuning dial
Appears
D
D
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.AMP
1
,” “P.AMP
2
” 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 filter
(p. 52)
➥
Push [
A
/NOTCH] to turn the auto or manual
notch filter ON and OFF.
• Rotate [NOTCH] control to set the attenuating fre-
quency for manual notch operation.
• IF shift
(p. 51)
➥
Rotate [TWIN PBT] controls (inner only).
• 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.
D
D
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 40