Icom IC-706 MKII Instruction Manual page 37

© RTTY (FSK) operation
© Connect a terminal unit as at left.
@Select RTTY (or GRTTY—see bottom of page)
mode with [MODE].
© Select the desired FSK tone/shift frequencies and
keying polarity as below. =
® Set the desired frequency with the main dial.
¢Use [(F-1) 1 4] in the [14 display when critical setting is
required.
© Operate the eonnected PC or TNC (TU).
PRESETTING FOR RTTY
Tone frequency
@ Push [DISPLAY] for 2 sec. to select quick set mode.
@Push [MENU] one or more times to select H2
ETTY TEHE; then rotate the main dial to select
the desired tone frequency (p. 43).
Shift frequency
@ Push [DISPLAY] for 2 sec. to select quick set mode.
@Push [MENU] one or more times to select i3
ETT SHIFT; then rotate the main dial to select
the desired shift frequency (p. 43).
RTTY keying
© Push [DISPLAY] for 2 sec. to select quick set mode.
@Push [MENU] one or more times to select t!4
ETT KEYIMA, then rotate the main dial to
select the desired keying polarity (p. 43).
© RTTY (AFSK) operation
© Connect a terminal unit as at left.
@ Select RTTY (or GRTTY) mode with [MODE].
@ Select the desired FSK tone/shift frequencies and
keying polarity as below.
@ Set the desired frequency with the main dial.
e Use [(F-1) 1 -"4] in the [1+ display when critical setting is
required.
© 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.
RECEIVE AND TRANSMIT 4
RTTY mode is selected.
RTTY RTTY mark frequency
p
E u Da
is set to 2125 Hz.
Z T
L= 2125 and 1615 Hz are
available.
TTY TOME
RTTY shift frequency is
set to 170 Hz.
170/200/425 Hz are
available.
RTTY keying is set to
'normal'.
normal: key open=mark
key close=space
reverse: key open=space
key close=mark
RTTY KEYING
RTTY reverse mode
Received characters are occaisonally 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
GIRTTY (RTTY reverse) mode.
= Push [MODE] for 1 sec. (while RTTY is selected)
to select GRTTY mode.
e Check the receive signal.
Normal Reverse
mark space mark
displayed freq. displayed freq.
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