Operating Rtty (Fsk) - Icom ic-7700 Instruction Manual

■ Operating RTTY (FSK)

[TX] indicator [RX] indicator
[AF]
RTTY/PSK
Appears
TX buffer screen
FFT scope
RX contents screen
Waterfall
Band keys
Main dial
DECODE
F-3
A DSP-based high-quality Baudot RTTY encoder/
decoder is built-in to the IC-7700. When connecting a
PC keyboard (p. 2-6),
an external RTTY terminal or PC.
If you would rather use your RTTY terminal, consult
the manual that comes with the RTTY terminal.
q Push a band key to select the desired band.
w Push
RTTY/PSK
• After RTTY mode is selected, hold down
1 second to toggle between RTTY and RTTY-R modes.
• "RTTY" or "RTTY-R" appears.
e Push [DECODE]
screen.
• The IC-7700 has a built-in Baudot decoder.
r Rotate the main dial to tune the desired signal.
• Aim for a symmetrical waveform, and ensure the peak
points align with the mark (2125 Hz) and shift (170 Hz)
frequency lines in the FFT scope.
• The S-meter indicates received signal strength when
signal is received.
t Press [F12] on the connected keyboard to transmit.
• [TX] indicator lights red.
y Type from the keyboard to enter the contents that
you want to transmit.
• The typewritten contents are indicated in the TX buffer
screen and transmitted immediately.
• The text color will change when transmitted.
• Press one of [F1]–[F8] to transmit the TX memory con-
tents.
u Press [F12] on the keyboard to return to receive.
✔ For your convenience
The transmission contents can be typed before being
transmitted.
q Perform the steps q to r above.
w Type from the connected keyboard to enter the
message that you want to transmit.
• The typewritten contents are displayed in the TX buffer
screen.
e Press [F12] of the connected keyboard to transmit
the typewritten contents.
• The color of displayed text, in the TX buffer screen, will
change when transmitted.
• To cancel the transmission, press [F12] twice.
r Press [F12] of the keyboard to return to receive.
4-13
RECEIVE AND TRANSMIT
you can operates RTTY without
to select RTTY.
to display the decode
F-3
4
for
RTTY/PSK