----- Original Message -----
From: "Martin AA6E" <msembx-aa6e@yahoo.com>
To: <tentec@contesting.com>
Sent: Thursday, March 17, 2005 22:56
Subject: Re: [TenTec] Orion Processing
> What would you do with faster DSP parts? You could increase the 3rd IF
> passband or provide more exotic filtering. I'm not sure it would make
> a big difference for most people. Providing a dedicated DSP for a sweep
> display might be a good thing.
>
> On the other hand, a faster control processor might benefit everyone -
> fewer hangups, etc.
I always view hangups as a possible design problem.
>
> Martin
>
> --- Bob Cunnings <cunnings@lectrosonics.com> wrote:
> > As for the Sharc DSP parts, they appear to be misidentified on the
> > schematic. I believe they are AD21065L, really, right? I've never
> > heard of
> > an AD21D56L.
> >
> > If so, the 21065 ran at a maximum of 66 MHz, while the next
> > generation 21161
> > (for instance, just one member of the 2116x family) runs at a maximum
> > speed
> > of 100 MHz. However, the 21161 has 2 floating point units, whereas
> > the 21065
> > has only one... so in theory a 3x performance boost can be realized
> > with the
> > newer part.
> >
> > Here we've used the 21161 in recent products, but it's quite
> > impractical to
> > touch the existing 21065 designs; there is nothing remotely close to
> > a
> > drop-in upgrade possible because of the huge differences between
> > Sharc
> > generations.
> >
> > RC
> >
> > -----Original Message-----
> > From: tentec-bounces@contesting.com
> > [mailto:tentec-bounces@contesting.com]On Behalf Of Bernard(wtrone)
> > Sent: Wednesday, March 16, 2005 9:27 PM
> > To: tentec@contesting.com
> > Subject: [TenTec] Orion Processing
> >
> >
> > I don't know if I have seen the numbers (operating speed, etc.)
> > for the
> > Orion's processor and DSP chips/ units. Does anyone have them?
> > Since this
> > design is probably going on 3 years old, what capabilities do the
> > newer
> > processors and DSPs have? If you believe in Moore's law, then the
> > speed
> > should be 2-4 times faster. I'm also wondering if the newer
> > processors and
> > DSPs are pin for pin compatible with the current ones.
> >
> > Why am I curious?
> >
> > Well, there has been some discussion on this board about a
> > complete
> > rewrite of the code, version 2.XXXXX. It could be that the new code
> > will
> > run "better" with faster processors, or, maybe, need better
> > processors.
> > And, a faster set of processors just may "solve" some of the problems
> > with
> > the sweep, and add a little more capability elsewhere.
> >
> > Just sort of thinking out loud.
> >
> > 73,
> >
> >
> > Bernard, WA4OEJ
> > _______________________________________________
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> >
> >
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> >
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