D Convenient Functions For Receive; D Rtty Reverse Mode - Icom IC-703 Instruction Manual

4
RECEIVE AND TRANSMIT
D
Convenient functions for receive
• 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 "
" is selected, push [
noise blanker ON and OFF.
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
• "NB" appears when the noise blanker is set to ON.
• Push [ ] for 1 sec. to enter the noise blanker
(F-2)
set mode.
• AGC (auto gain control) (p. 48)
➥ While "
" is selected, push [
AGC fast and AGC slow.
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
• "F " appears when the fast time constant is se-
AGC
lected.

D RTTY 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.
To receive a reversed RTTY signal correctly, select
åRTTY (RTTY reverse) mode.
q Select RTTY mode with [MODE].
w Push [DISPLAY] for 1 sec. to enter quick set mode.
e Push [MENU] one or more times to select "
," then rotate the main dial to select
RTTY and åRTTY modes.
• Check the interference tone.
r Push [DISPLAY] momentarily to exit quick set mode.
39
• IF shift (p. 47)
• Noise reduction (p. 50)
] to turn the
(F-2)
• Auto notch filter (p. 50)
.
•
] to select
(F-3)
.
QUICK SET MODE
➥ Rotate [SHIFT] control.
➥ While "
" is selected, push [
noise reduction ON and OFF.
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
• Push [(F-3) ] then rotate [M-CH] to adjust the
noise reduction level.
• "NR" appears when the noise reduction is set to ON.
➥ While "
" is selected, push [
auto notch filter function ON and OFF.
• "ANF" appears when the noise reduction is set to
ON.
1 ⁄ function
4
➥ While "
" is selected, push [
1
the ⁄ function ON and OFF.
4
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
[MENU]
Normal
Mark
Space
2125
170
Hz Hz
BFO
displayed freq.
] to turn the
(F-2)
.
] to turn the
(F-1)
] to turn
(F-1)
.
[MODE]
[DISPLAY] Main dial
Reverse
Mark
Space
2125
170
Hz Hz
BFO
displayed freq.