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

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RECEIVE AND TRANSMIT

■ Operating CW

[KEY SPEED] [TX] indicator [RX] indicator
[AF]
TRANSMIT
Appears
D D Convenient functions for receive
• Preamp (p. 5-9)
➥ Push [P.AMP]
(MF3)
amp 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] (MF4) for 1 sec. to turn the
attenuator function OFF.
• "ATT" and attenuation level appear when the attenu-
ator is ON.
• Noise blanker (p. 5-16)
➥ Push
to turn the noise blanker ON and
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
NB
set mode.
• Noise reduction (p. 5-17)
➥ Push
to turn the noise reduction ON and
NR
OFF.
• Rotate [NR] control to adjust the noise reduction
level.
• Noise reduction indicator (above
when the noise reduction is ON.
Band keys
Main dial
CW
several times to set the pre-
switch) lights
NB
for 1 sec. to enter noise blanker
switch) lights
NR
q Push a band key to select the desired band.
w Push
to select CW.
CW
• After CW mode is selected, push
tween CW and CW-R modes.
• "CW" or "CW-R" appears.
e Rotate the main dial to tune a desired signal.
• Try to match the desired signal's tone to the side tone
frequency.
• 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
• [TX] indicator lights red.
y Use the electric keyer or paddle to key your CW sig-
nals.
• The power meter indicates transmitted CW output
power.
u Adjust CW speed with [KEY SPEED].
• Adjustable within 6–48 WPM.
i Push
TRANSMIT
• Twin PBT (passband tuning) (p. 5-12)
➥ Rotate [TWIN PBT] controls (inner/outer).
• PBT indicator (above
PBT is in use.
• Push and hold
tings.
• Manual notch filter (p. 5-18)
➥ Push
NOTCH
ON and OFF.
• Rotate [NOTCH] control to set the attenuating fre-
quency.
• Notch indicator (above
the 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 and OFF.
• Rotate [AGC] control to adjust the time constant.
• 1 ⁄ function (p. 3-6)
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➥ Push [1/4] to turn the
• Auto tuning function (p. 5-19)
➥ Push [AUTOTUNE] to turn the auto tuning func-
tion ON and OFF.
• The transceiver automatically tunes the desired sig-
nal within a ±500 Hz range.
IMPORTANT!
When receiving a weak signal, or receiving a signal
with interference, the automatic tuning function may
not tune properly, or tune onto an undesired signal.
4-4
to toggle be-
CW
to transmit.
to return to receive.
switch) lights when
PBT-CLR
for 1 sec. to clear the set-
PBT-CLR
to turn the manual notch function
switch) lights when
NOTCH
to turn the AGC time constant
1 ⁄ function ON and OFF.
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