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Re: [Discuss-gnuradio] Welcome and brief update

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Welcome and brief update
Date: Sat, 11 Jan 2003 18:49:01 -0000

Daniel Rogers <address@hidden> said:

> Ettus, Matt wrote:
> >
> > I'm actually working on a high end syste, like this.  It is USB2 based,
> > instead of firewire.  It has 4 analog inputs (10 bits, 60 MS/s), 4 analog
> > outputs (12 bits, 120 MS/s).  We're about to get prototype boards made, and
> > it will eventually be sold in the $200 to $400 range, depending on
> > configuration.  Hopefully by late summer it will be available.
> >
> Perhaps I am a little dense here (and perhaps you don't want to reveal
> this information), but how you have send that much data down usb 2,
> which IIRC, has a max bandwidth of 480 MSps? (4*10*60*10^6>>4.8*10^8).

You use the onboard FPGA to do a digital up / downconversion, interpolation /
decimation and filtering.

You can't send the full bandwidth, but 30 MB/sec is doable over USB2, so 15 MS/s
at 16 bits is doable.


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