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Re: [Discuss-gnuradio] ADC questions
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] ADC questions |
Date: |
Tue, 23 Sep 2008 08:34:14 -0700 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Tue, Sep 23, 2008 at 05:04:54PM +0200, Sebastiaan Heunis wrote:
> Hi
>
> I have a few questions to ask about the ADC if anyone could please
> help me? I know that it has a 12-bit output, so our output is between
> 0 and 4095. I would just like to know how this ADC input gets
> converted after leaving the adc_interface block in the FPGA. In other
> words, how are positive and negative numbers represented, etc? The
> FPGA converts the 12bit input to a 16bit output. What is done to get
> it from the 0-4095 input to a 16bit output with + and - numbers?
>
> Thank you very much.
>
> Sebastiaan
See especially pages 8 and 9 of
http://gnuradio.org/trac/attachment/wiki/UsrpFAQ/USRP_Documentation.pdf
Negative numbers are 2's complement.
Eric
- [Discuss-gnuradio] ADC questions, Sebastiaan Heunis, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Brian Padalino, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Sebastiaan Heunis, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Brian Padalino, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Sebastiaan Heunis, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Brian Padalino, 2008/09/23
- Re: [Discuss-gnuradio] ADC questions, Sebastiaan Heunis, 2008/09/24
- Re: [Discuss-gnuradio] ADC questions, Brian Padalino, 2008/09/24
- Re: [Discuss-gnuradio] ADC questions, Eric Blossom, 2008/09/27
Re: [Discuss-gnuradio] ADC questions,
Eric Blossom <=