Icom I706MKTMG - Manual (Page 39)

36
4
RECEIVE AND TRANSMIT
D RTTY (FSK) operation
➀
Connect a terminal unit as at left.
➁
Select RTTY (or åRTTY—see bottom of page)
mode with [MODE].
➂
Select the desired FSK tone/shift frequencies and
keying polarity as below.
➃
Set the desired frequency with the main dial.
• Use [ (F-1) 1/4] in the M4 display when critical setting is
required.
➄
Operate the connected PC or TNC (TU).
PRESETTING FOR RTTY
Tone frequency
➀
Push [DISPLAY] for 2 sec. to select quick set mode.
➁
Push [MENU] one or more times to select Q2
RTTY TONE; then rotate the main dial to select
the desired tone frequency (p. 48).
Shift frequency
➀
Push [DISPLAY] for 2 sec. to select quick set mode.
➁
Push [MENU] one or more times to select Q3
RTTY SHIFT; then rotate the main dial to select
the desired shift frequency (p. 48).
RTTY keying
➀
Push [DISPLAY] for 2 sec. to select quick set mode.
➁
Push [MENU] one or more times to select Q4
RTTY KEYING; then rotate the main dial to
select the desired keying polarity (p. 48).
➀
Connect a terminal unit as at left.
➁
Select SSB (LSB) mode with [MODE].
• Generally, LSB is used on the HF bands and FM is
used for the VHF band.
➂
Select the desired FSK tone/shift frequencies and
keying polarity as below.
➃
Set the desired frequency with the main dial.
• Use [ (F-1) 1/4] in the M4 display when critical setting is
required.
➄
Operate the connected PC or TNC (TU).
PRESETTING FOR RTTY
Tone frequency
Same as above.
Shift frequency
Same as above.
RTTY keying
Same as above.
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.
➥ Push [MODE] for 1 sec. (while RTTY is selected)
to select åRTTY mode.
• Check the receive signal.
CH
VFO A
RTTY
M1 SPL A/B A=B
RTTY mode is selected.
P O
S1
5
5 3 7 9 20 40
10
60dB
RTTY
Q2 RTTY TONE
RTTY mark frequency
is set to 2125 Hz.
2125 and 1615 Hz are
available.
RTTY
Q3 RTTY SHIFT
RTTY shift frequency is
set to 170 Hz.
170/200/425 Hz are
available.
RTTY
Q4 RTTY KEYING
RTTY keying is set to
‘normal’.
normal: key open=mark
key close=space
reverse: key open=space
key close=mark
D RTTY (AFSK) operation
Reverse Normal
BFO
170
Hz
2125
Hz
170
Hz
2125
Hz
BFO
mark space
displayed freq. displayed freq.
mark space