The AFC option in many of the digital software programs will cause the
frequency to change. I use DM780 and if I have the AFC option enabled, it
will cause my frequency to shift. In noisy band conditions it is very
noticeable. Its as if the AFC is chasing the static crashes.
If both stations have
On Sat, Apr 7, 2012 at 9:15 AM, Robert Young w9mo2...@gmail.com wrote:
...If both stations have that software option enabled...
===
Yep, that's almost certainly what is happening, making it seem as if
something is drifting. A little time spent operating PSK and/or reading the
mail on PSK
Since I started using the K3 for PSK-31 contacts, I've noticed
that I have to make many fine tuning adjustments during weak
signal QSOs. I don't remember having to make as many using the
Small Wonder Labs PSK-20 direct conversion receiver. I am using
Data-A mode and a SignaLink USB sound card
Bill,
I would suggest that The other station is drifting is the best answer.
The drift of either the 1ppm or 5ppm TCXO is based on temperature, and
not on other factors - the 1% TCXO is better, but it is all with respect
to temperature, not any other considerations.
The 5 ppm TCXO vs the 1ppm
Thanks for your answer Don. I guess I'll put the KTCXO3-1 lower
on my wish list.
Fortunately, with a little care cocoaModem automatically
preserves the transmit frequency. I also help it by using the
second receiver to retune the signal leaving the transmit
frequency unchanged. Being able to
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