Andy wrote:

> if the signal wason air just for that period
> of eight hours, then the accuracy can only ever
> be stated / measured to the nearest 0.000035Hz

Depends on the available S/N. Give me half a cycle
and you can have 20 digits... if the S/N is high enough.

Stefan wrote:

> Can you confirm you were on air at
> 8270.000000000000000000000 Hz

From 02:00 to 05:00 the average frequency
was 8269.9999992 Hz +/- 0.1uHz.

Uwe wrote:

> so no decode, Paul?

No decode.  The signal was strong enough, so I guess
something upset the phase.   The carrier after the
message was ok.

Jacek wrote:

> (see attached spectrogram).

You're not using vttime to correct for the soundcard
frequency offset and drift.  You need to put a shaped
pulse-per-second into the 2nd channel of your soundcard,
which vttime will use to resample the signal to an
exact rate.

--
Paul Nicholson
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