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38
4
RECEIVE AND TRANSMIT
D
Connections for RTTY (FSK)
4
8
12
[ACC]
1
2
3
7
6
5
9
10
11
13
Rear panel
TU or TNC
Personal computer
Rear panel
view
Colors refer to connection
to the supplied ACC cable.
*
1
Connect SQL line when required.
MSEND (orenge)
GND (red)
FSKK (black)
SQL*
1
(light green)
AF out (light blue)
■
Operating RTTY
D
RTTY (FSK) operation
q
Connect a terminal unit as at above.
w
Push
[
(
Y
)
BAND]/[
(
Z
)
BAND] to select the desired
band
.
e
P
ush [MODE] momentarily to select RTTY mode.
• After RTTY mode is selected, push [MODE] for 1 sec.
to toggle between RTTY and SSB-D modes.
r
While the quick set mode item “
Q2
” is selected in
RTTY mode, rotate main dial to select
RTTY or
å
RTTY mode
.
• Push [DISPLAY] for 1 sec. to enter the quick set mode.
• Push [MENU] one or more times to select
Q2
.
• Push [DISPLAY] momentarily to return to normal oper-
ating mode.
t
Rotate [AF] to set audio to a comfortable listening
level.
y
Select the desired FSK tone/shift frequencies and
keying polarity as at page 40.
u
Rotate the main dial to tune a desired signal.
• Use [
(F-1)
1/4
] in the
M4
display when critical setting is
required.
• S
-meter indicates received signal strength.
• I
f the received signal cannot be demodulated, try se-
lecting
å
RTTY mode (or RTTY mode).
i
Transmit a SEND signal from your TNC.
• T
he TX indicator lights red.
• T
he Po meter indicates transmitted RTTY signal
strength.
o
Operate the connected PC or TNC (TU) to trans-
mit RTTY (FSK) signals.
R
LSB
CH
VFO A
P
O
S1
5
5
3
7
9
20
40
10
60dB
USB CW
RTTY
AM WFM
M4 1/4 TON AGC
[TX] indicator [MODE] Main dial
[DISPLAY]
[F-1]
[MENU]
[F-2]
[AF]
[
Y
]
[
Z
]
“RTTY” or “
å
RTTY” appears
4