[DSP-10] : Analog Devices ADSP 2181Substitution

[Kenneth R Burtchaell]

Hi Mike,as I said in my original e-mail I am not a digital man but if you
read  KD6OZH's article he cites doing similar circuitry as in the DSP-10
at lower parts countb and costs. In addition CT1DMK is just announcing a
GPS controlled oscillator useable to 135MHz that I'm sure is using chips
in the PLD family.

I would expect that implementing PLDs  in the DSP-10 would probably be a
major redesign.But to date I have not heard mention of a  suitable
replacement for the ADSP2181As I read John's article the hardware
requirements for the replacement of the ADSP2181 and its cost should be
less.I don't know how to assess the software impact.

In my view I visualize a second generation DSP-10 XCVR  with PLDs doing
many of the functions with reduced parts count and cost.If I were 20
years younger, I would jump at the oppurtunity to educate myself to where
I could particpate in the development of digital circuitry .Unfortunately
the "Golden Years" have given me other burdens to carry.I wish I spoke
digital because nowdays some of the most important rf function are being
handled better with digital solutions rather than with the hardware
manipulations with which I grew up.

I hope I have not got KD6OZH or CT1DMK in hot water  with my
interpatations of their ideas
.  
On Sun, 29 Sep 2002 16:44:16 -0700 KD7TS <kd7ts@ispwest.com> writes:
> Ken,
> 
> Not sure why this is addressed to wa1mba reflector... hope you catch 
> it here,
> 'cause I'm not cross posting.
> 
> There are  quite a few operations taking place in the ADSP-2181. It 
> is doing IF
> conversion to audio, including programmable audio filters in "real 
> time" as well
> as the data collection for the waterfall display and a few other 
> functions.
> 
> The DSP chips are pretty well optimized with registers and 
> instruction sets to
> handle math instructions in a few ( often a single ) clock cycle. 
> There might
> very well be some way to do this with logic arrays, however to 
> achieve the same
> performance would be difficult and not cost effective.
> 
> Mike KD7TS
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