Operating Am; D Convenient Functions For Receive - Icom IC-7700 Instruction Manual

■ Operating AM

[MIC] [TX] indicator [RX] indicator
[AF]
AM/FM
Appears

D Convenient functions for receive

• Preamp (p. 5-9)
➥ Push [P.AMP]
(MF3)
preamp OFF, preamp 1 ON or preamp 2 ON.
• Push and hold [P.AMP] (MF3) for 1 sec. to turn the
preamp function OFF.
• "P.AMP1" or "P.AMP2" appears when the preamp 1
or preamp 2 is ON.
• Attenuator (p. 5-9)
➥ Push [ATT] several times to set the attenu-
(MF4)
ator in 6 dB steps.
• Push and hold [ATT]
attenuator function OFF.
• "ATT" and attenuation level appear when the attenu-
ator is ON.
• Noise reduction (p. 5-17)
➥ Push to turn the noise reduction ON or
NR
OFF.
• Rotate [NR] control to adjust the noise reduction
level.
• Noise reduction indicator (above
when the noise reduction is ON.
• Audio tone control (p. 12-4)
➥ Push [SET] then [LEVEL]
F-7
set mode. Select an item with [Y]
then rotate the main dial to adjust the audio tone.
• Twin PBT (passband tuning) (p. 5-12)
➥ Rotate [TWIN PBT] controls (inner/outer).
• PBT indicator (above
PBT is in use.
• Push and hold
PBT-CLR
tings.
Band keys
Main dial
several times to set the
for 1 sec. to turn the
(MF3)
switch) lights
NR
to enter level
F-1
/[Z]
F-1
switch) lights when
PBT-CLR
for 1 sec. to clear the set-
q Push a band key to select the desired band.
w Push
AM/FM
• "AM" indicator appears.
• After AM mode is selected, push
tween AM and FM modes.
e Rotate the main dial to tune to the desired fre-
quency.
• The S-meter indicates received signal strength when
signal is received.
r Rotate [AF] to set audio to a comfortable listening
level.
t Push TRANSMIT
• The TX indicator lights red.
y Speak into the microphone at your normal voice
level.
• Adjust the microphone gain with [MIC] at this step, if
necessary.
u Push
TRANSMIT
return to receive.
• Noise blanker (p. 5-16)
➥ Push
NB
OFF, and then rotate [NB] control to adjust the
threshold level.
• Noise blanker indicator (above
when the noise blanker is ON.
• Push and hold
er set mode.
• Notch filter (p. 5-18)
➥ Push NOTCH
tion ON or OFF.
• Rotate [NOTCH] control to set the attenuating fre-
quency.
• Notch indicator (above
either the auto or manual notch is ON.
• AGC (auto gain control) (p. 5-11)
➥ Push [AGC] switch several times to select
AGC FAST, AGC MID or AGC SLOW.
➥ Push
AGC VR
manual setting ON or OFF.
• Rotate [AGC] control to adjust the time constant.
• Auto tuning function (p. 5-19)
➥ Push [AUTOTUNE] to turn the auto tuning func-
F-2
tion ON or OFF.
• The transceiver automatically tunes the desired sig-
nal within ±5 kHz range.
IMPORTANT!
When receiving a weak signal, or receiving a signal
with interference, the automatic tuning function may
not tune, or may tune to an undesired signal.
4-29
RECEIVE AND TRANSMIT
to select AM.
AM/FM
or [PTT] (microphone) to transmit.
or release [PTT] (microphone) to
to turn the noise blanker ON or
NB
for 1 sec. to enter noise blank-
NB
to turn the manual notch func-
switch) lights when
NOTCH
to turn the AGC time constant
4
to toggle be-
switch) lights