Re: LF: WSPR SNR

[Michel F5WK <f5wk@mterrier.net>]

Hello Jim, LF,

> I think this shows that this mode should compete well with QRSS3 for 
> readibility.

I made a quick comparison a few days ago between a weak wspr signal and
QRSS-3. With Spectrum Lab, I added noise to the locally generated beacon
until no decoding. SNR below -28 db was not decoded, and it was a very
precise threshold.

Then, I just switched to QRSS-3, keeping the signal level at absolutely the
same level. Only faint traces could be seen on the waterfall with no
readibility at all. The noise had to be lowered by 2 to 3 dB in order to
read the QRSS-3 message.

73,

Michel f5wk