Re: LF: RE: DCF-77

[DK1IS <DK1IS@kabelmail.de>]

Hi Roelof and Clemens,

besides the AM time signal DCF 77 has an additional phase modulation to 
better define the start of the seconds which can be heard as a hissing 
noise; see e.g. Wikipedia.
73,
Tom, DK1IS

Am 06.08.2013 18:32, schrieb Clemens Paul:
> Hi Roelof,
>
> I just did a quick check on the remote Perseus at DL0AO
> while resting on a couch in my shack.
> This saved myself from having to get up from the couch at 36°C
> for switching on my own Perseus. :-)
> I see two 50Hz (+/-) spurs about 23dB down.
> Noise sidebands are asymmetric "here".
> On the lower side ca. 290Hz,on the upper side ca. 160Hz wide judging from
> waterfall.
>
> HTH
> 73
> Clemens
> DL4RAJ
>
>
>   
>
> > -----Original Message-----
> > From: owner-rsgb_lf_group@blacksheep.org
> > [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Roelof Bakker
> > Sent: Tuesday, August 06, 2013 5:43 PM
> > To: rsgb_lf_group@blacksheep.org
> > Subject: LF: DCF-77
> >
> > Hello all,
> >
> > I just noticed that DCF-77 on 77.5 kHz has what looks like 500 Hz wide
> > noise sidebands.
> > Am I the only one who sees this, or is this done on purpose e.g. some
> > datamode transmission.
> >
> > 73,
> > Roelof, pa0rdt
> >
> >
> >
> > -----
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> > Ausgabedatum: 06.08.2013
>
> .