Stefan
There are software programmes about that can read CW and print it on screen
especially machine sent CW es QRSS
The facility already exists but it is another level of demodulation that is
unnecessary. Basic CW and good EARS or QRSS and a VISUAL observation are the
preferred methods
de mal/g3kev
----- Original Message -----
From: "Stefan Schäfer" <[email protected]>
To: <[email protected]>
Sent: Wednesday, July 25, 2012 5:51 PM
Subject: Re: LF: 4X OP32 report
That reminds me about a thought i recently had:
If the decode level of OP8 can be compared to QRSS-3, isn't there a
chance to use QRSS-3 instead and program an application that will decode
the callsign???
The other features can be applied as well of course (listing, mapping...).
Then everybody would be happy :-)
73, Stefan
Am 25.07.2012 19:39, schrieb mal hamilton:
> Graham es Co
> While Opera es other data modes are an alternative to CW for a change they
> need another level of demodulation and cannot really compete with the
basic
> CW mode or QRSS CW.
> I often see traces of all data modes that could easily be identified in
QRSS
> but they do not decode therefore the purpose of the transmission is lost.
> de mal/g3kev
>
> ----- Original Message -----
> From: "Graham"<[email protected]>
> To:<[email protected]>
> Sent: Wednesday, July 25, 2012 4:07 PM
> Subject: Re: LF: 4X OP32 report
>
>
>
>> schrieb Stefan, :)
>>
>> Why do you think so?
>>
>> Its linked to the DSP engine in Op , there is a timing issue , if
>> other applications lock the sound card at a different rate , due
to
>> the % tolerances , low level decodes can be lost , noting, Op is a
>> 'data mode , so the overheads in the transmission are much higher
,
>> as are the DSP engine requirements , as can be seen with 'older'
pc's
>> cpu loading can be a issue , as is a one-pass system , all the
>> processing is taking place in real time
>>
>> But on with the show ,
>>
>> 73 -G..
>>
>> -76 dB in 28 mHz b/w , what is that when translated to 2.5Khz
>> B/w ?
>>
>>
>>
>>
>> --------------------------------------------------
>> From: "Stefan Schäfer"<[email protected]>
>> Sent: Wednesday, July 25, 2012 3:08 PM
>> To:<[email protected]>
>> Subject: Re: LF: 4X OP32 report
>>
>>
>>> Am 25.07.2012 15:51, schrieb Graham:
>>>
>>>> Pity nothing decoded in the US last night , but signal 's in 1500
>>>> /2000 mile range where quite substantial ...
>>>> from this , it seems that propagation on 136 is really linked to
>>>>
> the
>
>>>> seasons ?
>>>>
>>> Yes (of course) and no. W1VD received me quite well a few weeks ago, see
>>> https://dl.dropbox.com/u/19882028/LF/07_July2012.jpg
>>> Not to forget W1TAG:
>>> https://dl.dropbox.com/u/19882028/LF/DK7FC_Juli2012.jpg
>>>
>>> So there is some propagation in summer but of course it depends on the
>>> solar activity. Don't know how the condx have been yesterday.
>>>
>>>
>>>> One point from previous trials , If Spec-lab is used with Opera
>>>> , then SL must be set to 48Khz sample rate , or OP can loose
>>>>
> low
>
>>>> level decode sensitivity.
>>>>
>>> Why do you think so? As long as the frequency range of a SSB bandwidth
>>>
> at
>
>>> audio levels passes through the SL filter, then it should be fine. So 8
>>> kHz SR should be fine. Of course it depends on which shift frequency you
>>> have to use. I have to use 11 kHz shift and so i choosed a SR of 30 kHz.
>>>
>>>
>>> 73, Stefan
>>>
>>>
>>
>
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