ICOM IC-703 Manuale Utente
39
4
RECEIVE AND TRANSMIT
• Preamp and attenuator (p. 46)
➥ Push [P.AMP/ATT] momentarily to set the preamp
ON or OFF.
• Lights green when the preamp is set to ON.
➥ Push [P.AMP/ATT] for 1 sec. to set the attenuator
ON.
• Push [P.AMP/ATT] momentarily to turn the attenua-
tor OFF.
• Lights red when the attenuator is set to ON.
• Noise blanker (p. 48)
➥ While “M3” is selected, push [
(F-2)
NB] to turn the
noise blanker ON and OFF.
• Push [DISPLAY] once or twice to select
M.
• Push [MENU] one or more times to select
M3.
• “NB” appears when the noise blanker is set to ON.
• Push [
• Push [
(F-2)
NB] for 1 sec. to enter the noise blanker
set mode.
• AGC (auto gain control) (p. 48)
➥ While “M4” is selected, push [
(F-3)
AGC] to select
AGC fast and AGC slow.
• Push [DISPLAY] once or twice to select
M.
• Push [MENU] one or more times to select
M4.
• “F
AGC
” appears when the fast time constant is se-
lected.
• IF shift (p. 47)
➥ Rotate [SHIFT] control.
• Noise reduction (p. 50)
➥ While “S4” is selected, push [
(F-2)
NR] to turn the
noise reduction ON and OFF.
• Push [DISPLAY] once or twice to select
S.
• Push [MENU] one or more times to select
S4.
• Push [(F-3)
NRL] then rotate [M-CH] to adjust the
noise reduction level.
• “NR” appears when the noise reduction is set to ON.
• Auto notch filter (p. 50)
➥ While “S4” is selected, push [
(F-1)
ANF] to turn the
auto notch filter function ON and OFF.
• “ANF” appears when the noise reduction is set to
ON.
•
1
⁄
4
function
➥ While “M4” is selected, push [
(F-1)
1/4] to turn
the
1
⁄
4
function ON and OFF.
• Push [DISPLAY] once or twice to select
M.
• Push [MENU] one or more times to select
M4.
D
Convenient functions for receive
DRTTY reverse mode
Received characters are occasionally garbled when
the receive signal is reversed between MARK and
SPACE. This reversal can be caused by incorrect
TNC connections, settings, commands, etc.
the receive signal is reversed between MARK and
SPACE. This reversal can be caused by incorrect
TNC connections, settings, commands, etc.
To receive a reversed RTTY signal correctly, select
åRTTY (RTTY reverse) mode.
åRTTY (RTTY reverse) mode.
qSelect RTTY mode with [MODE].
wPush [DISPLAY] for 1 sec. to enter quick set mode.
ePush [MENU] one or more times to select “Q2
RTTY REV,” then rotate the main dial to select
RTTY and
RTTY and
åRTTY modes.
• Check the interference tone.
rPush [DISPLAY] momentarily to exit quick set mode.
Reverse
Normal
BFO
170
Hz
2125
Hz
170
Hz
2125
Hz
BFO
Mark
Space
displayed freq.
displayed freq.
Mark
Space
[MODE]
Main dial
[DISPLAY]
[MENU]
QUICK SET MODE