4
RECEIVING AND TRANSMITTING
4-22
Operating RTTY (FSK)
With the built-in RTTY decoder and the contents set
in the RTTY TX memory, you can operate the basic
RTTY operation without using an external device.
L If you are using PSK software, refer to the software manual.
1. Select the RTTY mode.
2. Open the RTTY DECODE screen.
» DECODE
L You can select [DECODE] on the MENU screen only
while in the RTTY mode.
RTTY DECODE screen
3. Rotate
to tune the desired signal.
FFT scope
Tuning indicator
4. Transmit the RTTY memory.
• The TX status indicator lights red and the Po meter
swings.
Contents being transmitted are displayed.
(Example: transmitting the RT1’s TX memory)
Lights red Lights red
D About the RTTY reverse mode
If you are receiving an RTTY signal but cannot decode
correctly, try in the RTTY-R (reverse) mode.
Select the RTTY-R mode by touching [RTTY] on the
MODE screen.
L Touching [RTTY] toggles between the RTTY mode and
the RTTY-R mode.
170 Hz 2125 Hz 170 Hz2125 Hz
RTTY mode Normal RTTY-R mode
Space Mark Space Mark
D Twin Peak Filter
The Twin Peak Filter (TPF) changes the audio
frequency response by boosting the mark and space
frequencies for better reception of RTTY signals, or for
decoding the external AF output on a PC.
1. While in the RTTY mode, display the Multi-
function menu.
Push
2. Touch [TPF].
LTouching [TPF] turns the function ON or OFF.
3. To close the Multi-function menu, push
.
Lights while the TPF is ON
NOTE: When you are using the Twin Peak Filter, the
received audio output may increase. This is not a
malfunction.
InformationL
• Aim for a symmetrical wave form, and be sure the
peak points align with the mark (2125 Hz) and shift
(170 Hz) frequency lines in the FFT scope.
• The S-meter displays the received signal strength,
when a signal is received.
• If you cannot decode correctly, try in the RTTY-R
mode.
• Tune to where both “◄” and “►” are displayed in
the tuning indicator.
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