Date: Tue, 11 Sep 2012 10:31:51 +0200
To: rsgb_lf_group@blacksheep.org
From: IK1WVQ Mauro <ik1wvq@stmb.it>
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Subject: Re: LF: slow WSPR?
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Hi to all,

it is true what OPERA mode is "secret", but, I=20
think, it is better than WSPR for semplicity:=20
on-off carrier , no time synchronisation required=20
(then it is possible to made a simple beacon stand alone)..

I read in this goup what DF6NM Markus is working=20
around a "indipendent" decoding software ...
(" .... I'm still working on the receive side,=20
and the first results using coherent correlation=20
have been very promising. MArkus")

If this will be, maybe the "solution" of OPERA "problems" ???

73 de Mauro IK1WVQ



At 10.07 11/09/12, Roger Lapthorn wrote:
>Stefan,
>
>Maybe it is worth approaching K1JT with a=20
>suggestion/request that a slower version of WSPR be created?
>
>It has been several years since WSPR was first=20
>released (2008) and there is a lot of sense in a=20
>version with even better S/N performance. WSPR=20
>still has better Internet database support than=20
>OPERA and is not "secret" in the way the latter is.
>
>73s
>Roger G3XBM
>
>-- Via my 2.4GHz transceiver --
>
>On 11 Sep 2012, at 00:09, Stefan Sch=C3=A4fer=20
><Stefan.Schaefer@iup.uni-heidelberg.de> wrote:
>
> > It's a pity that there is no slow-WSPR, e.g.=20
> needing 32 minutes or so. If WSPR (2 minutes=20
> FSK) is about as efficient as OP8 ( i heared=20
> so), then it should be a real alternative to=20
> the slow DX modes on LF but not on MF!
> >
> > There is a software that plays recorded audio=20
> files in a faster mode, so that QRSS becomes=20
> audible. VE2IQ has reported to me last year=20
> about it but i don't remember the name.
> >
> > Would it be possible to make our own slow=20
> WSPR by using that software and playing a 32=20
> minute manipulated WSPR at 16x speed, feeding=20
> it to the normal WSPR rx software? The slower=20
> code could be generated outside the program.=20
> Would that be a useful test or do i miss something?
> >
> > 73, Stefan/DK7FC
> >
> > Am 10.09.2012 19:26, schrieb Graham:
> >> May be  Mal
> >>
> >> But  once again  Jim has  the  answer to=20
> this  problem ..if  you  can find=20
> his  articles  after  Google  trashed the  uk500khz  news group ,
> >>
> >> I think Jose R  predicts a  6  dB=20
> gain  by  changing  to  PSK  from the=20
> Opera  on/off  keying  but  that  would  prevent  most  of the  LH/MF=
 usage
> >>
> >> G..
> >>
> >
>
>
>Nessun virus nel messaggio in arrivo.
>Controllato da AVG - www.avg.com
>Versione: 9.0.930 / Database dei virus:=20
>2437.1.1/5261 -  Data di rilascio: 09/10/12 20:34:00