Icom IC-7800 - Operating CW

4-4
■ Operating CW
[KEY SPEED]
[TX] indicator
[RX] indicator
[AF] [CW][TRANSMIT] Main dial
Band keys
q Push a band key to select the desired band.
w Push [CW] to select CW.
 •AfterCWmodeisselected,push[CW]totogglebe-
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specified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] to transmit.
Appears
 •[TX]indicatorlightsred.
y Use the electric keyer or paddle to key your CW
signals.
 •The power meter indicates transmitted CW output
power.
u Adjust CW speed with [KEY SPEED].
 •Adjustablewithin6–60WPM.
i Push [TRANSMIT] to return to receive.
D Convenient functions for receive
• Preamp (p. 5-10)
➥ Push [P.AMP] several times to set the preamp
OFF, preamp 1 ON or preamp 2 ON.
•“P.AMP1”or“P.AMP2”appearswhenthepreamp1
or preamp 2 is ON. Main and sub have independent
preamp controls.
• Attenuator (p. 5-10)
➥ Push [ATT] several times to set the attenuator in
6 dB steps.
•Holddown[ATT]for1secondtosettheattenuatorin
3 dB steps.
•“ATT”andattenuationlevelappearwhentheattenu-
ator is ON.
• Noise blanker (p. 5-18)
➥ Push [NB] switch to turn the noise blanker ON or
OFF, and then rotate [NB] control to adjust the
threshold level.
•Noise blanker indicator (above [NB] switch) lights
when the noise blanker is ON.
•Holddown[NB]for1secondtoenternoiseblanker
set mode.
• Noise reduction (p. 5-19)
➥ Push [NR] switch to turn the noise reduction ON
or OFF.
•Rotate [NR] control to adjust the noise reduction
level.
•Noisereductionindicator(above[NR]switch)lights
when the noise reduction is ON.
• Twin PBT (passband tuning) (p. 5-13)
➥ Rotate [TWIN PBT] controls (inner/outer).
•Holddown[PBTCLEAR]for1secondtoclearthe
settings.
• Manual notch filter (p. 5-20)
➥ Push [NOTCH] switch to turn the manual notch
function ON or OFF.
•Rotate[NOTCH]controlto settheattenuatingfre-
quency.
•Notchindicator(above[NOTCH]switch)lightswhen
the manual notch is ON.
• AGC (auto gain control) (p. 5-12)
➥ Push [AGC] switch several times to select AGC
FAST, AGC MID or AGC SLOW.
➥Push[AGCVR]toturntheAGCtimeconstant
manual setting ON or OFF.
•Rotate[AGC]controltoadjustthetimeconstant.
•
1
⁄4 function (p. 3-6)
➥ Push [1/4] to turn the
1
⁄4 function ON or OFF.
• Auto tuning function (p. 1-9)
➥ Push [AUTO TUNE] to turn the auto tuning func-
tion ON or OFF.
•Thetransceiverautomaticallytunesthedesiredsignal
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
RECEIVE AND TRANSMIT