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Re: LF: Re: WSPR beacon

To: <[email protected]>
Subject: Re: LF: Re: WSPR beacon
From: "Graham" <[email protected]>
Date: Sun, 6 Sep 2009 22:17:20 +0100
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]>, <[email protected]>, <D7A418493EBC4423BC13F8EE114A69EA@JimPC> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]

Dave,

Looks to be the same problem I had at the end of last year with a delta-4 pci sound card , the card worked fine for data modesand did not need to have a clock adjustment, however it produced some confusing results on wspr, in that it appeared to shorten the transmission time by a couple of seconds, which in turn, resulted in only low/ noisy signals decoding on rx , with the same situation occurring during tx, in that a slolid signal did not decode where as a lower/broken reception decoded reliably.

Changing to  the  older awe64 resolved the problem.

G ..



--------------------------------------------------
From: "Dave Sergeant" <[email protected]>
Sent: Sunday, September 06, 2009 9:20 PM
To: <[email protected]>
Subject: LF: Re: WSPR beacon


On 6 Sep 2009 at 21:05, James Moritz wrote:

Dear LF Group,

The M0BMU WSPR beacon is running again - I have jacked up the antenna to
increase the ERP a bit. G4WGT and G7NKS are also active - any reports
would be very welcome.

Cheers, Jim Moritz
73 de M0BMU

OK, it looks as if the sound card clock synch error is the problem. As
suggested I have been trying recording for the first minute of each
period then stopping - by the simple expedient of switching the K2 to a
different band. Result, solid copy.....

1958  16  2.5   0.503972  0 M0BMU IO91 37
2000  16  2.4   0.503972  0 M0BMU IO91 37
2002  16  2.6   0.503972  0 M0BMU IO91 37
2006 -26  6.2   0.503965  0 M0BMU IO91 37
2006  16  2.6   0.503972  0 000AAA (BadMsg)
2008  12  2.5   0.503972  0 M0BMU IO91 37
2010  11  2.7   0.503971  0 M0BMU IO91 37

(apart from something went a bit wrong at 2006... And note the +16dB,
you are strong!).

I can see a couple of other weak traces on the spectrogram but no copy
of others.

(and having now stopped doing that tedious turning off after 1 minute I
now see that it is copying Jim solidly now on full cycles. Maybe you
did something your end Jim?.....)

73 Dave G3YMC

http://www.davesergeant.com







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