[hpsdr] sampling

Jason A. Beens jbeens at sensetechnologies.com
Sun Apr 22 08:22:15 PDT 2007


Glenn Thomas wrote...
> Here I disagree. The sampling rate has nothing directly to do with 
> dynamic range. Dynamic range is determined by the number of bits in 
> the sample. In general, the (voltage) dynamic range is the number of 
> bits times 6 dB. You can use a faster sample rate with fewer bits to 
> improve dynamic range by simply adding N samples and calling the sum 
> (with additional bits generated by the carries) the sample, but 
> you've then traded sample rate for extra bits at a 1/N sample rate. 
> Your sample is then the average over the 1/N sample period, which 
> might be different from a single sample taken with a more precise ADC.

We are actually in agreement here, but you have the ability to describe
the situation much better than me.  Sorry my earlier reply was
misleading.



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