[hpsdr] Pico-ITX as possible processor for HPSDR?

[Leon]

----- Original Message ----- 
From: "Philip Covington" <p.covington at gmail.com>
To: "Chris Albertson" <chrisalbertson90278 at yahoo.com>
Cc: <hpsdr at lists.hpsdr.org>; "Chris Salinas" <n0ttw at yahoo.com>
Sent: Monday, August 13, 2007 2:17 AM
Subject: Re: [hpsdr] Pico-ITX as possible processor for HPSDR?


> ***** High Performance Software Defined Radio Discussion List *****
>
> On 8/12/07, Chris Albertson <chrisalbertson90278 at yahoo.com> wrote:
>
>> The new Yaesu FT-450 is an SDR although they don't market it as such.
>> What they do say is the they digitize the signal at the IF stage
>> and do all further processing including demodulation and filters
>> digitally.  Sound like SDR to me.  The FT-450 uses an Analog
>> Devices "Blackfin".  The neat thing about the Blackfin is that (1)
>> the hole thing sell for between $14 and $28.  Compared to a
>> "pico ITX" the AD chip is almost free.
>
> What about the 16 bit DSP limitation of the Blackfin? The RISC CPU of
> the Blackfin is 32 bits but the DSP engine is only 16. That sucks for
> dynamic range and you might as well then not bother with a 24 bit ADC.

It isn't really a limitation as double-precision arithmetic is feasible, 
given the very high speed of the device.

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
leon355 at btinternet.com
http://www.geocities.com/leon_heller


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