KUHL! I'll check it out!

Doug, k3qt
s/v Callista

"Larry W4CSC" wrote in message
...
"Doug Dotson" wrote in
:

PSK31 is more of a conversational mode like CW or RTTY. I'm
not sure it has any error correcting/retry at all. It just has a very
good ability to pick a signal out of the noise. I wonder how you
QSO with a station you can't hear? How do you find it?


Finding the QSO is easy. All stations use synthesized rigs on USB with a
carrier freq of 14.070 (or other standardized freq set for other bands).
The software (WinWarbler in my case) listens to the entire 3 Khz bandwidth
and generates a "waterfall" spectrum display that is a history for about a
minute down the waterfall. Stations you can or cannot hear, create a two-
freq track down the waterfall. You simply point your mouse at it and
"click" to set the software to that audio frequency. The software has AFC
that locks onto the faintly-traced signal and starts printing on one of
the
three "channels" it is copying, simultaneously. You can tell when the
other guy stops sending because his trace stops and you click TX to start
sending what you've already loaded into your buffer. PSK31 is faster than
you can type, by quite a margin even for a good typist, so it will soon
catch up to what you're typing now. Unlike packet, however, it doesn't
get
"stuck" on trying to send a packet, and will miss the occasional letter on
bad fading. There has got to be some error-correcting FEC for it to work
THIS good.

As your speaker has many stations warbling away on different audio freqs
of
the 14.070 reference frequency, you might as well turn it off as it will
just drive you crazy on the weekends when it's busy. As each QSO only
occupies 31 Hz of bandwidth, there's plenty of room in 3 Khz for everyone
with big spaces in between. Tuning in one station is real easy, even for
the deaf!

Larry W4CSC