David,
AFSK A is optimized for use with RTTY. It defaults to LSB and the
frequency displayed is the frequency of the Mark tone. The latter
feature does not make too much sense to me when using a waterfall
display, but it makes a lot of sense when using narrow filters and
tuning to a RTTY station with the VFO. If one arranges sked with an
RTTY station, the sked frequency will normally be given as the mark
frequency.
Data A is the best to use for those soundcard data modes where a
waterfall display is used. It defaults to the usual USB used for many
data modes. The K3 frequency display is the frequency of the suppressed
carrier.
73,
Don W3FPR
On 7/16/2014 10:03 AM, David Cole wrote:
Hi all,
What EXACTLY is the difference between "AFSK A", and "DATA A".
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