On Mon,9/15/2014 7:07 PM, James Bennett wrote:
What is the real benefit to switching to AFSK-A mode for RTTY? Is that what
everyone is using, or is DATA-A just as good?
Hi Jim,
I read other folks responses without seeing your original post. Sorry
about that. To use AFSK, you need a single decoder program like MMTTY
that operates much like you would on CW and SSB, tuning up and down the
bands with a narrow-band receiver. This is the standard for contesting
and DXing, and it permits the RX to be very narrow, so that it is much
less bothered by QRM. DATA-A is for multi-decoder programs like you have
been using, and you may find it more satisfactory for general use in the
same way you use WSJT-X and PSK31 software. Or maybe not. The major
difference between RTTY and other digital modes is that there are no
standard dial frequencies like there are for JT65, JT9, and PSK31. RTTY
ops generally range all over the band, especially during contests, and
also for DX operations.
So the best answer to your question is that DATA-A is for "dial
frequency" operation like JT65 and PSK31, whereas AFSK-A is for tuning
up and down like a CW op.
73, Jim K9YC
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