Message-ID: <000f01cd878d$65646830$0501a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <503EA718.2010301@charter.net> <8CF54D89088EA63-22E8-50D77@webmail-d136.sysops.aol.com> <503FFBAB.7090609@iup.uni-heidelberg.de>
Date: Fri, 31 Aug 2012 15:29:21 -0000
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Subject: Re: LF: Opera frequency usage
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Good work Chaps. I am waiting for another QSO version of Opera where I can
get a Radio response and not via the Web data base
g3kev

----- Original Message -----
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, August 30, 2012 11:47 PM
Subject: Re: LF: Opera frequency usage


>
> Am 30.08.2012 17:09, schrieb Markus Vester:
> > [...]
> > - DK7FC was active on a nearby frequency during most of the night. In
> > conjunction with the noise blanker the RX is desensitized by the a
> > nearby strong signal. The problem is exacerbated by high density of
> > keyclicks in Opera (5 to 8x more than QRSS), and that most seem to
> > apply hard keying. Trying to interleave operating times (eg. even vs
> > odd days, or hours) is probably not a satisfactory solution.
> Sorry for that Markus. You know, the AM modulator is very near to the
> top of my Todo list and the first half of the circuit is working now
> (BTW not using a PWM with a TL494 but a VCO using a CD4046. That works
> well). So it sould be possible for me to reduce key click of signals
> generated in SpecLab, i.e. QRSS/DFCW/HELL/Beacon-Cw, soon. If my clicks
> would be reduced, would then the NB performance come back to 100%?
>
> However Opera directly keys the PA using the COM port and an external
> signal generator (SL!). This is one of the main advantages of that
> software and why Graham calls it CW replacement mode (of course CW
> cannot be replaced, it is a language for its own).
>
> Recently we discussed about transmitting the OP code by playing an image
> in slow hell. Or alternatively a file which can be loaded ito the
> arbitrary waveform generator of SLs signal generator could play the code
> in SL. Of course the software could be run simultaneously. Maybe even
> the Opera TX-button can be virtually pressed by a DOS command so the
> announcement of that transmission is is sent to the web? The mode and
> band information must be sent too, to coordinate the software with the
> actual TX then. That makes it more and more complex.
> So what might be the solution for those who use an external signal
> source and just key the PTT by the COM port using Opera software? Maybe
> a special higher order shaping using hardware, like in a CW HF TRX?
> Possible!
>
> 73, Stefan/DK7FC
>
>