Hi Andy & Rik,
This is apparently the limit for Op32, it is the weakest report I have seen
never mind received so it deserved some recognition.
Thanks for comments from both of you.
73, Gary - G4WGT.
----- Original Message -----
From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Thursday, February 02, 2012 9:18 PM
Subject: Re: LF: RE: Opera weak signal Rx
Isn't -41dB about right for OP32?
8.192 seconds per symbol, = 0.122Hz,
= 43dB down on 2500Hz.
So +2dB on Noise bandwidth. Couple of dB low perhaps, but not far out
'jnt
On 2 February 2012 21:06, Rik Strobbe <[email protected]> wrote:
Gary,
in the little test I did earlier today (sending only the last 96 bits)
I noticed that Opera reported -38dB while the real SNR was about +15dB.
I assume that the SNR value gets wrong as a part of the bits get lost (eg.
QSB).
In addition Opera gives a 4dB lower value than WSPR.
The combination may explain -41dB.
73, Rik ON7YD
________________________________
Van: [email protected]
[[email protected]]
namens Gary G4WGT [[email protected]]
Verzonden: donderdag 2 februari 2012 21:59
Aan: [email protected]; LF Group
Onderwerp: LF: Opera weak signal Rx
Hi All,
Amazing Opera decode of weak signal at -41dB :-
20:38 136 UA4WPF de G4WGT Op32 3462 km -41 dB in IO83qo, nr Preston.
73, Gary - G4WGT.
|
