From: "jannsen" <0482183881-0001@t-online.de>
To: rsgb_lf_group@blacksheep.org
References: <200110151812.f9FICno01937@smtp.wanadoo.nl>
Subject: Re: LF: dcf39/dk8kw
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Date: Fri, 19 Oct 2001 22:04:51 +0200
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Hi Ko, Wolfgang, Markus es All.

Ko, thank you for the hint. Gspec is really a fine help. but sri the resolution 
is not sufficient measuring 10mHz or less. 

may be it is`nt neccessary any more analysing the mark of DCF39 whether there is 
a keying in it or not. Markus wrote: 
 
>There is no extra narrowband modulation. The widening of the mark spectral 
>line is simply caused by the normal FSK bursts (200 bd, 340 Hz shift) which 
>are sent at irregular intervals, at least once in every 12 seconds.

and Wolf(gang) wrote in a direct e-mail:

> Leider ist die 
> Frequenztastung nicht kohärent, d.h. die Phase des "Trägers" bei 138.8300 kHz 
> kehrt nach dem kurzen Impulspaket nicht zum ursprünglichen Wert zurück.


But when I do compare the DCF A0 (the mark between two bursts) with the A0 of 
p.e.Deutsche Welle (A3BC) using SpecLab or Gspec it seems there is something in 
the DCF-mark that looks intentionally (phase keying ?) not to be seen on other 
A0s.

sri, Markus, but the screenshot does`nt convince me.
sri, Wolfgang, I do not belief in "Kohärenzprobleme". 

the simplest would be questioning the staff at DCF. but would one get the truth
out of them ?

I will see my friends at the Radio-Monitoring-Station Itzehoe 
(RegTP-Aussenstelle) to solve the problem (I make it my problem) by analysing
the frequenzy using their equipment (I have been member of the staff).

will do it soon. sri at time I`m vy busy doing my job (mayor).

regards
Uwe/dj8wx