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Re: [Discuss-gnuradio] window sizing issue

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] window sizing issue
Date: Fri, 16 Mar 2007 15:42:11 -0700
User-agent: Mutt/1.5.9i

On Fri, Mar 16, 2007 at 06:29:42PM -0400, address@hidden wrote:
> Ok, I can accept that this device was not intended to be used as a 
> calibrated measurement device, but maybe I can give it a shot.  If I keep 
> the decimation constant, and stabilize the temperature, what other 
> considerations do I need to take into account (other than the obvious one, 
> ie gain) for the basic am-demodulation routine I am using?  Can I consider 
> the FPGA as a "black box" and just calibrate the output vs the input at 
> the physical connector?
> thanks,
> eric

Yes, you should be able to make this work.

You'll want to apply a known stimulus at several frequencies and
amplitudes, measure what you get for each of those, then determine
your calibration coefficients.

If you haven't already, I suggest reading up on "two-point calibration".


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