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From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <504E733E.5000208@iup.uni-heidelberg.de>,<8CF5E5BCA46639D-8FC-4829A@webmail-d050.sysops.aol.com> <7E7DFBB4D102A04DB5ADC88D66628A4A0FB22D26@ICTS-S-MBX5.luna.kuleuven.be>,<82bc7bcd97ea679e8be267e8e2add69c@dl1dbc.net> <7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E5E@ICTS-S-MBX5.luna.kuleuven.be>,<505083D5.6070709@iup.uni-heidelberg.de> <7E7DFBB4D102A04DB5ADC88D66628A4A0FB23EED@ICTS-S-MBX5.luna.kuleuven.be>
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Date: Wed, 12 Sep 2012 15:21:18 +0100
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Subject: Re: LF: RE: slow WSPR?
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Try  the  tests  using the   Path-sim  propagation  software  , that's  a 
good universal    test  instrument, free  to  download

G..

http://www.moetronix.com/ae4jy/files/pathsimtech100.pdf

--------------------------------------------------
From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
Sent: Wednesday, September 12, 2012 3:09 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: LF: RE: slow WSPR?

> Hello Stefan, all,
>
> first of all: I am certainly not anti-Opera. I have used the mode on 
> 500kHz and for sure it is a useful mode.
> But out of curiosity I have done the noise test as described before and I 
> am pretty sure the results are correct: in absense of QRN/QSB WSPR will 
> outperform Opera2 by 7dB in average.
> It would be interesting if the man behind this mode would open his books 
> and give us an insight in the demodulation/decoding system.
> About Opera32: you had indeed very good result at +5000km. But keep in 
> mind that, having 32 minutes to transmit your call, this should be 
> competitive to QRSS30 or DFCW90.
>
> 73, Rik  ON7YD - OR7T
>
> ________________________________________
> Van: owner-rsgb_lf_group@blacksheep.org 
> [owner-rsgb_lf_group@blacksheep.org] namens Stefan Schäfer 
> [Stefan.Schaefer@iup.uni-heidelberg.de]
> Verzonden: woensdag 12 september 2012 14:45
> To: rsgb_lf_group@blacksheep.org
> Onderwerp: LF: slow WSPR?
>
> Hi Rik,
>
> Am 12.09.2012 14:05, schrieb Rik Strobbe:
>> Hello Sabine,
>>
>> as mentioned in the report the test were done off-air, by adding equal 
>> amounts of pure white noise to WSPR / Opera signals of identical 
>> amplitude.
>> So no QRM/QRN or QSB involved. Maybe I will do these tests over with QRN 
>> and/or QSB added (if there is some interest and if time permits).
>>
> Yes, there is some interest!
> It would be possible to run an audio file in SpecLab, presenting typical
> LF-evening noise, maybe plus some DCF/HGA sidebands and carrier! I think
> it is possible that there will be a difference, resulting in pro-Opera.
> At least yesterday it seemed to me that OP32 cannot be as bad as often
> mentioned.
>
> 73, Stefan/DK7FC