From: DL4YHF@aol.com
Message-ID: <c6.15a219bf.2b166f49@aol.com>
Date: Wed, 27 Nov 2002 13:56:09 EST
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Logging & New SpecLab....
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<HTML><FONT FACE=arial,helvetica><FONT  SIZE=2>Hi Alan,
<BR>thanks for the comments and the info. Other members of the group were doing the tougher part when getting their logging stations running - - - 
<BR>
<BR>&gt;&gt; 
<BR>if we can measure and log phase accurately enough, and do the stations transmit a reliably constant phase.
<BR>We know DCF39 does not, but others may be more useful....time data might be
<BR>a problem....or it might be an advantage !! measure time ??
<BR>&lt;&lt;
<BR>
<BR>
<BR>By chance, Markus DF6NM has just explained his observations on the DCF39 phase jumps &nbsp;to me (rewarding, tnx!!). But we are not sure yet if they (at DCF) really care for a high-precision carrier frequency. All I can say now is that the phase jump is always a multiple of &nbsp;25.7xx° (or so), but WHEN these jump's occur I can't say. 
<BR>With some luck and a bit of "audio preprocessing in the time domain" it may be possible to make a phase plot of DCF39 with all phase jumps removed, one fine day... but more experimentation must be done.
<BR>
<BR>Would a well-known experienced programmer of beautiful user interfaces like to have the sourcecodes ? ;-)
<BR>
<BR>
<BR>Regards,
<BR>Wolf DL4YHF
<BR>
<BR>
<BR></FONT></HTML>