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Ok Markus ,
wspr is based 1500 Hz and OP4
1800 Hz the pass bands are not
overlapping , this was the original 500 KHz
configuration for some years , until
the 'dash to the mid band' occurred shortly
after the new band was allocated ,
When the software is used , the carrier
placement is dictated by the noise level
within the pass band , in keeping with agile
frequency practice
Dual mode tx and monitoring was
the normal situation
73 -Graham
Sent: Tuesday, April 30, 2013 10:55 PM
Subject: LF: Re: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG
Hi Graham,
going by my experience with Op-32 correlation
experiments on LF, I would much rather have separate frequency bands for Op
and WSPR. I also believe that 100 Hz for Opera-32 is much wider than
necessary (that's 400 channels of 0.25 Hz bandwidth). It would be more
economical and also computationally efficient to restrict the
range to say 25 Hz (similar to WSPR-15).
All this would be easier if the audio frequencies
weren't hardcoded into the Opera software.
73, Markus (DF6NM)
----- Original Message -----
Sent: Tuesday, April 30, 2013 11:26 PM
Subject: LF: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG
SUGGESTED TEMPORARY CHANGE TO MF QRG
Its proposed to drop the MF Opera operating QRG
to 474.2 dial set USB
As it would appear , the WSPR qrg is
not to move back to the original 477
spot any time soon, to enable dual
monitoring of Opera and WSPR as was the
original status , Opera tones being arranged to fall out
side the wspr pass band , the two modes
coexist on the same dial-set usb qrg
No change to the software is envisaged
as an eventual return to 477 is anticipated
once any band planning is implemented, or
more normal use is made of the mid band.
The move was previously suggested, but
not implemented to prevent a clash
with wspr-15 activity , which now appears to of
subsided .
Where as it was unlikely to compromise
the Opera decode engine , it was evident from events
that conversely wspr could of been affected.
Comments any one ?
Tnx- Graham
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