[Moon-net] [Fwd: Re: JT procedure]

[DF2ZC Bernd]

Dear Kjell,

The confidence level can have values from 0 to 10. It is a measure of the
confidence in the decode by the deep search decoder. Because this decoder
works by correlation of the signal buried in the noise with a theoretical
signal form created from your own callsign and all callsigns in calls3.txt
it displays a confidence level in the result of this correlation process.

My experience is that confidence levels > 6 are nearly always trustworthy.
With levels below 5 it would often be better to wait for another decode. Of
course the confidence level is not the only thing. The operator needs to
check DF and DT values as well to judge whether this was a good decode.
Sometimes also confidence levels below 5 are valid decodes.

You will soon realise that in practise it is very easy working with and
judging the confidence levels.

BTW the fact that WSJT Deep search mode doesn't copy character by character
but produces a correlation as explained above is what many hams don't quite
understand  - or in other words judge "this is no real decode but invented
by the computer". Of course that doesn't apply. It is a good decode because
this mode compares possible combinations of own callsign and other
callsigns/reports. And the software only displays a result when it has found
a good match. 

vy 73 Bernd DF2ZC (JO30RN)
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-----Original Message-----
From: Moon-net-bounces at list-serv.davidv.net
[mailto:Moon-net-bounces at list-serv.davidv.net] On Behalf Of Kjell Jarl
Sent: Freitag, 17. November 2006 19:15
To: moon-net at list-serv.davidv.net; eme-net at yahoogroups.com
Subject: [Moon-net] [Fwd: Re: JT procedure]

Hi,
I have now read more, specifically in wsjt_User_600.pdf.
What does "confidence level" mean? It is valued as down to 1 (with example
of 3). On what range?
I am not sure...
73
Kjell, SM7GVF