Re: LF: WSPR DECODES

[PA7EY <pa7ey@amsat.org>]

Hi Mal,

Your observations are in line with what I have observed many times most on LF and occasionally on MF. In my case, local noise is the main cause. At least that is what I thought of as the reason.

But the opposite happens sometimes as well. I barely see something on the waterfall but there is a decode, even with fairly acceptable S/N ratio's making deep-search false positives as reason for the decode not very likely.

My situation, noise wise, is however very different from yours.

Can you share some screenshots from failing decodes?

73 Ulrich, PA7EY

2015-11-15 10:37 GMT+01:00 mal hamilton <g3kevmal@talktalk.net>:

MF

I have been observing WSPR signals this past couple of days on 474.2 Khz and although most are Decoding there are a number of weak signals visible on the  waterfall that do not decode. I am in a quiet location so noise is not a problem. My clock and input are set up as specified.

Had these station been using QRSS the copy would be perfect.

also

the same applies to Opera signals visible on the waterfall but do not decode, usually weak.

QRSS has the advantage that the raw signal observed is immediately readable on the screen even the barely visible.

 

G3KEV