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4
RECEIVE AND TRANSMIT
D RTTY (FSK) operation
➀Connect a terminal unit as at left.
➁Select RTTY (or åRTTY—see bottom of page)
mode with [MODE].
➂Select the desired FSK tone/shift frequencies and
keying polarity as below.
➃Set the desired frequency with the main dial.
•Use [(F-1)1/4] in the M4 display when critical setting is
required.
➄Operate the connected PC or TNC (TU).
PRESETTING FOR RTTY
Tone frequency
➀
Push [DISPLAY] for 2 sec. to select quick set mode.
➁Push [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.
➁Push [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.
➁Push [MENU] one or more times to select Q4
RTTY KEYING; then rotate the main dial to
select the desired keying polarity (p. 48).
➀Connect a terminal unit as at left.
➁Select SSB (LSB) mode with [MODE].
•Generally, LSB is used on the HF bands and FM is used
for the VHF band.
➂Select the desired FSK tone/shift frequencies and
keying polarity as below.
➃Set the desired frequency with the main dial.
•Use [(F-1)1/4] in the M4 display when critical setting is
required.
➄Operate 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.
RTTY mode is selected.
is set to 2125 Hz.
available.
set to 170 Hz.
available.
‘normal’.
