[TenTec] Pegasus vs. Argonaut V - CW Filter Bandwidth

[Mike Hyder -N4NT-]

If Ten-Tec eliminated their fine QSK, they might as well fold their amateur
tent.

Mike N4NT

----- Original Message -----
From: "Mark Erbaugh" <mark@microenh.com>
To: "Duane Grotophorst" <n9dg@yahoo.com>; "Bill Nicolson"
<k2rig@comcast.net>; <TenTec@contesting.com>
Sent: Wednesday, October 30, 2002 8:25 AM
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