■Operating RTTY (FSK)

[TX] indicator [RX] indicator

Band keys

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[AF]

RTTY/PSK

DECODE

Main dial

F-3

Appears

TX buffer screen

FFT scope

RX contents screen

Water-fall

RECEIVE AND TRANSMIT

4

ADSP-based high-quality Baudot RTTY encoder/de- coder is built-in to the IC-7700. 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 terminal or TNC.

qPush a band key to select the desired band. w Push RTTY/PSK to select RTTY.

•After RTTY mode is selected, push and hold RTTY/PSK for 1 sec. to toggle between RTTY and RTTY-R modes.

•“RTTY” or “RTTY-R” appears.

ePush [F-3•DECODE] to display the decode screen.

• The IC-7700 has a built-in Baudot decoder.

rTo 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.

tPress [F12] on the connected keyboard to transmit.

• [TX] indicator lights red.

yType 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 be changed when transmitted.

•Press one of [F1]–[F8] to transmit the TX memory con- tents.

uPress [F12] on the keyboard to return to receive.

✔For your convenience

The transmission contents can be typed before being transmitted.

qPerform the steps q to r above.

wType from the connected keyboard to enter the message that you want to transmit.

•The typewritten contents are indicated in the TX buffer screen.

ePress [F12] of the connected keyboard to transmit the typewritten contents.

•The color of displayed text, in the TX buffer screen, will be changed when transmitted.

•To cancel the transmission, press [F12] twice.

rPress [F12] of the keyboard to return to receive.

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