Hi to all,
it is true what OPERA mode is "secret", but, I
think, it is better than WSPR for semplicity:
on-off carrier , no time synchronisation required
(then it is possible to made a simple beacon stand alone)..
I read in this goup what DF6NM Markus is working
around a "indipendent" decoding software ...
(" .... I'm still working on the receive side,
and the first results using coherent correlation
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
suggestion/request that a slower version of WSPR be created?
It has been several years since WSPR was first
released (2008) and there is a lot of sense in a
version with even better S/N performance. WSPR
still has better Internet database support than
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 Schäfer
<[email protected]> wrote:
> It's a pity that there is no slow-WSPR, e.g.
needing 32 minutes or so. If WSPR (2 minutes
FSK) is about as efficient as OP8 ( i heared
so), then it should be a real alternative to
the slow DX modes on LF but not on MF!
>
> There is a software that plays recorded audio
files in a faster mode, so that QRSS becomes
audible. VE2IQ has reported to me last year
about it but i don't remember the name.
>
> Would it be possible to make our own slow
WSPR by using that software and playing a 32
minute manipulated WSPR at 16x speed, feeding
it to the normal WSPR rx software? The slower
code could be generated outside the program.
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
this problem ..if you can find
his articles after Google trashed the uk500khz news group ,
>>
>> I think Jose R predicts a 6 dB
gain by changing to PSK from the
Opera on/off keying but that would prevent most of the LH/MF usage
>>
>> G..
>>
>
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