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Date: Thu, 06 Mar 2014 23:32:03 +0100
From: Steinar Aanesland <saanes@broadpark.no>
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Subject: Re: LF: QRV this evening WSQ2 or JT1
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Hi Wolf

Thanks for your interesting answer. I used my work email earlier today
and it has probably messed up some thing.

LA5VNA S


On 06.03.2014 21:56, wolf_dl4yhf wrote:
> Hi Steinar,
> 
> 
> you wrote:
>> Wolf,
>>
>> Did you get my audio file ?
>>
>> LA5VNA S
> Yes, many thanks for that.. maybe a previous message didn't get out, or
> was lost on the way...
> 
> 
>>>
> Ok Steinar,
> indeed, completely downloaded now. Maybe I was too quick when trying,
> and the file wasn't complete on the server yet.
> 
> I already tried Rik's large wave file, and getting a good decode from
> his reception of Domenico. Maybe it's the same strong carrier around
> 475.2 kHz (which made copying with the original decoder impossible here).
> Since there is no 'intelligent' automatic notch integrated yet, it's
> important to adjust the decoding frequency range so that there is no
> "carrier" visible between the red (or yellow, for the 2nd channel)
> markers in the spectrogram.
> With that, Rik's wave file produced the following:
> cq cr bq eeiz7tk iz7slz iz7slz
> Ok, far from being perfect, but -similar to my favourite mode- it's not
> necessary to copy each character 100% error-free. That's part of the
> fun, as well as tweaking the parameters.
> 
> 
> Decoding Steinar's 33 MByte file, with SNR between -15 and -25 dB
> (towards the end):
> 
> --- Replay
> 'C:\WaveArchive\WSQ_Tests_2014\2014_03_05_LA5VNA_WSQ2_no_decode.wav' ---
> ciy8slz de dl4yhf
> -12 to -25 d\
> rrr fb but here some errors now e
> ownpadh ng 3NBysf frol Sij.@
> tryhog l udsa
> n xudtt ad bvk,@h.f@tlzd l4yhf|3 s
> 
> There seemed to be some spectral spreading at the end, irritating the
> simple peak-searching loop in the decoder.
> But with this file (along with Rik's and my own recordings of IZ7SLZ) I
> can now try to modify the decoder and see if a different method for
> finding the peak frequencies (equivalent to symbols in WSQ) can improve
> the behaviour when multi-path 'widens' the signal.
> 
> All the best,
> Wolf .
> 
> 
>