Re: [Discuss-gnuradio] RadioShark: USB AM/FM receiver

[Dave Emery]

On Sun, Jul 20, 2003 at 12:49:48PM -0700, John Gilmore wrote:
> Might be fun to write GNU Radio drivers for this, if it has any
> flexibility at all.  They're taking pre-orders now.
> 
>       John
> 
> http://www.griffintechnology.com/products/radioshark/index.html
> via http://macslash.org/article.pl?sid=03/07/16/1119207
> 

        Doesn't sound to my ear much like a SDR type thing at all, but
rather an AM and FM radio of probably very conventional design with
conventional quadrature detector and stereo chip interfaced to a A/D
chip and a USB controller (and presumably a one chip micro to control
everything).

        Very unlikely they do more than export 16 bit A/D samples of the
(conventional) detector output over the USB - no provisions to output IF
samples or do DSP based demodulation.

        And there would be no obvious reason to use an A/D any faster
than the 44.1 ks/s of conventional sound card chips (which they probably
use, in fact).

        Hard to see how it relates to gnu-radio or SDR.

        Remotely possible the thing could be hacked to output IF
samples, but probably not of much other than the AM and FM broadcast
band as seen through the IF bandpass filters (200 khz or so for FM).


-- 
        Dave Emery N1PRE,  address@hidden  DIE Consulting, Weston, Mass 02493
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