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Re: LF: Opera decode

To: <[email protected]>
Subject: Re: LF: Opera decode
From: "Graham" <[email protected]>
Date: Tue, 19 Jan 2016 17:03:23 -0000
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]> <F6DE9D64E261486DA454671269E47857@AGB> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Deep Search ??

?? in this  case = Random noise

Nothing mysterious , Dynamic simply engages , should the main decoder fail, the look-up table of call signs is also maintained via the web .. s/n levels from -40 dB and better will be decoded by the original opera system .

The painting by numbers exercise is the same for any of the correlation detectors produced to date, all have call list's , all produce false detections , some more than others , Opera go's one step on and provides a validation exercise ...Its only provided for 477 and 136, where low s/n levels are encountered , all the other bands are single pass , serial 250 bit data decode.

73-G,



--------------------------------------------------
From: "John Gibbs" <[email protected]>
Sent: Tuesday, January 19, 2016 6:29 AM
To: <[email protected]>
Subject: Re: LF: Opera decode

Thanks all for the further explanation of my mysterious opera dynamic detection decode. Another opera detection has shown up this evening, and posting here for info only.

05:24 136 G3XDV de VE7BDQ Op32 Deep Search ?? -43 dB in SOUTHDELTA BC 1471.7 Hz
***********  19/01/2016  ***********

73  John /  VE7BDQ




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