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Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem |
Date: |
Wed, 26 Dec 2007 05:55:01 -0800 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Wed, Dec 26, 2007 at 01:56:46AM -0800, Firas Abbas wrote:
> > I agree that the results do look better. My concern is overflow when
> > both I and Q are used. If you can try all of these with max-strength
> > signals on both I and Q at the same time, I would be more than happy to
> > include the final results in the standard build of the FPGA.
>
> Actually we are using I & Q (The DDC out is complex as you know) and
> the FFT used in usrp_fft.py is complex FFT.
> However, If you prefer, I can repeat all the tests using DBSRX
> board, or please suggest what tests you would like me to do.
I believe that Matt was referring to using max-strength I & Q inputs
to the Basic Rx along with an Rx mux setting that routes both ADC
outputs into the same DDC. (The default config with the Basic Rx
feeds a constant zero into the Q DDC input).
Eric
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, (continued)
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Don Ward, 2007/12/23
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/24
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Don Ward, 2007/12/24
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/24
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Don Ward, 2007/12/24
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/25
- Message not available
- Message not available
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Matt Ettus, 2007/12/25
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/26
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Matt Ettus, 2007/12/26
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/26
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem,
Eric Blossom <=
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas Abbas, 2007/12/26
- Re: [Discuss-gnuradio] USRP Dynamic Range and 8 Bit Problem, Firas A., 2007/12/27