I am trying to get MMTTY v 1.61 working on FSK rather than AFSK. I built
the interface as shown on AA5AU's website. I tried to have a QSO with
someone nearby and he said the noise level dropped (he is using MMTTY on
AFSK), but no copy on the screen. I listened to my TX with a shortwave
radio and seem to hear normal RTTY sounds.
The interface for FSK goes from DB9 pin 3 to ACC2 (13 pin) plug pin 2 on the
radio. PTT from DB9 pin 7 to Pin 9 on ACC2.
Ground from DB9 pin 5 to ACC2 pin 8.
I changed MMtty to Com-TXd for FSK. No other changes to MMTTY. I am not
running rig control either.
On the 570, I tried Polarity (Menu # 30) both OFF and ON and no change.
AFSK still works fine when I changed everything back. I am using the same
COMM PORT for AFSK and FSK.
Is there something else I need to set on MMTTY or the 570 menu?
Tnx
Cal
N9KO
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