4-13
■ Operating RTTY (FSK)
A DSP-based high-quality Baudot RTTY encoder/de-
coder is built-in to the IC-7800. When connecting a PC
keyboard (p. 2-6), RTTY operation can be performed
without an external RTTY terminal, TNC or PC.
If you would rather use your RTTY terminal or TNC,
consult the manual that comes with the RTTY termi-
nal or TNC.
[TX] indicator [RX] indicator
[F-3•DECODE] [RTTY/PSK][AF] Main dial
Band keys
q Push a band key to select the desired band.
w Push [RTTY/PSK] to select RTTY.
•AfterRTTYmodeisselected,holddown[RTTY/PSK]
for 1 second to toggle between RTTY and RTTY-R
modes.
•“RTTY”or“RTTY-R”appears.
e
Push[F-3•DECODE]todisplaythedecoderscreen.
•TheIC-7800hasabuilt-inBaudotdecoder.
r To tune the desired signal, aim for a symmetrical
wave form and ensure the peak points align with
the mark (2125 Hz) and shift (170 Hz) frequency
lines in the FFT scope.
•TheS-meterindicatesreceivedsignalstrengthwhensig-
nal is received.
t
Push [F12] on the connected keyboard to transmit.
•[TX]indicatorlightsred.
y Type from the keyboard to enter the contents that
you want to transmit.
•ThetypewrittencontentsareindicatedintheTXbuffer
screen and transmitted immediately.
•Thetextcolorwillbechangedwhentransmitted.
•Pushoneof[F1]–[F8]totransmittheTXmemorycon-
tents.
u Push [F12] on the keyboard to return to receive.
FFT scope
TX buffer screen
RX contents screen
Water-fall
✔ 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.
•ThetypewrittencontentsareindicatedintheTXbuffer
screen.
e Push [F12] of the connected keyboard to transmit
the typewritten contents.
•Thecolorofdisplayedtext,intheTXbufferscreen,will
be changed when transmitted.
•Tocancelthetransmission,push[F12]twice.
r Push [F12] of the keyboard to return to receive.
4
RECEIVE AND TRANSMIT
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