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Re: LF: 27.925 is correct dial

from [Markus Vester] [Permanent Link][Original]
To: <[email protected]>
Subject: Re: LF: 27.925 is correct dial
From: "Markus Vester" <[email protected]>
Date: Sat, 8 Mar 2014 19:36:55 +0100
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Hi Graham,
 
well opds "dBOp" has been calibrated to display SNR on the same "average power" scale as Opera, ie carrier power in 2.5 kHz minus 4 dB. However I concede that opds SNR measurements are not always accurate. Especially with either strong signals, or unstable / incoherent transmissions, the estimate of the carrier power or noise can go wrong by several dB.
 
You mentioned improvements to the decoding algorithm in the latest Opera version - can you give details?
 
73, Markus

From: Graham
Sent: Saturday, March 08, 2014 7:19 PM
Subject: Re: LF: 27.925 is correct dial

...
OP32   min  as used on   136 KHz   , gives  ~  -41 dB  min  , so   OP2H
should run  - 47  , I note  Dex  reached  -48 , which is  -54/55  on
Marcus's  scale

Tnx , G,


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