Since YOU are not a high speed CW op, maybe you could get TT to just
eliminate CW all together???
I am a high speed CW op and I can assure you that TT has already slowed down
QSK in their rigs. The Omni A/C/D and the Corsair II rigs had excellent QSK
at just about any speed you wanted to run. I watched the RF waveform from a
Corsair II and Hercules amp running at 160 wpm (watched on an O'scope, not
copied!!). My Omni 6 that I received in '92 was a severe disappointment in
the QSK department (but certainly not in the rcvr department!) because at
around 68 wpm, the Omni 6 started running dot/dash spacing together (because
of the PLL lock time requirements). It is stated that the Orion has 'silky
smooth QSK as high as 60wpm'!!! Big deal!!
But the trade off for high speed QSK is a better receiver...a better
receiver, not because DSP can not keep up. For my Omni 6 and hopefully for
my Orion, I certainly accept the slower QSK trade-off for the better
receiver design. I just keep my old-faithful Corsair II handy for those
QSO's in excess of 70 wpm.
Tom/W4BQF
-----Original Message-----
From: Mark Erbaugh [mailto:mark@microenh.com]
Sent: Wednesday, October 30, 2002 8:25 AM
To: Duane Grotophorst; Bill Nicolson; TenTec@contesting.com
Subject: Re: [TenTec] Pegasus vs. Argonaut V - CW Filter Bandwidth
Duane,
> I think bottom line tradeoff became tighter filter
> skirts vs. good QSK performance. I'm convinced that
> better filter skirts could be possible with the
> Pegasus/Jupiter DSP hardware - if you are willing to
> live with a longer TX/RX turnaround time. For high
> speed CW ops that is not likely an acceptable
> tradeoff. I'm pretty sure that the ADSP2181 DSP of
> the RX340 is the same as the Peg/Jup, but it doesn't
> attempt to switch between RX and TX though.
That makes sense. Any DSP that takes place introduces a delay in the signal,
if for no other reason than the number of samples required for the filter,
but there is also the processing time. With a tighter filter, more samples
are required, hence a longer delay.
That being said, it sure would be nice, since I'm not a high speed CW op,
and not interested in fast QSK if we could slow down ( or eliminate ) the
QSK in trade off for tighter filters.
73,
Mark
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