''It's a pity that there is no slow-''WSPR''
And a even bigger pity, very few stations would be able to transmit
it !
HF wspr and OP 2 modes are broadly similar , remembering , wspr is
a peak recoding system and Op is averaging system
so comparison over a radio path leads to a version of 'Pilot
Vertigo' where the real and the imaginary tend to merge . Yes on paper
such should be correct , but in this case , that has yet to be realised
:)
But .... At last there is some active development for low noise modes
again ... !
G...
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From: "Stefan Schäfer" <[email protected]>
Sent: Tuesday, September 11, 2012 12:09 AM
To: <[email protected]>
Cc: "Edgar J Twining" <[email protected]>
Subject: LF: slow WSPR?
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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