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Re: LF: Re: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG

To: <[email protected]ksheep.org>
Subject: Re: LF: Re: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG
From: "Graham" <[email protected]>
Date: Tue, 30 Apr 2013 23:20:31 +0100
Importance: Normal
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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 -----
From: Graham
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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