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Re: [Discuss-gnuradio] byte-wide ADC transfers

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] byte-wide ADC transfers
Date: Mon, 16 Jan 2006 17:48:33 -0800
User-agent: Mutt/1.5.6i

On Mon, Jan 16, 2006 at 07:00:43PM -0500, Lamar Owen wrote:
> On Monday 16 January 2006 18:24, Clark Pope wrote:
> > I believe somebody was working on modifying the USRP fpga so that it would
> > stream 8-bits I and 8-bits Q instead of 16-bit to get a wider bandwidth
> > into the PC? Is this in the latest CVS for the fpga? Any instructions on
> > how to use it?
> Yes, this is in the latest, as well as the last release version of the USRP 
> code.  See host/lib/usrp_standard.h under the section about the Rx data 
> format for details.
> See the latest usrp_fft.py in the gnuradio examples for how to use it from a 
> high level.  See the gr-usrp stuff for a lower level usage.
> -- 
> Lamar Owen

That's all correct.  However, the current FPGA code does not implement
proper rounding to 8-bits, which results in a big DC component.


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