Re: LF: 16 bit vs 24 bit ADC?

["James Moritz" <james.moritz@btopenworld.com>]

Dear Bill, Andy, LF Group,

It seems to me it should be quite easy to subject this to practical testing. 
First, using SpecLab etc., measure the SNR of a weak signal in the presence 
of noise, with the FFT parameters chosen so that the signal is near the 
quantisation noise level.. Then attenuate the signal and noise at the ADC 
input by, say, 24dB. This would effectively reduce the resolution/accuracy 
of the A-D conversion by 4 bits ( I guess you would want to chose the 
signal, noise and attenuation levels so that the external noise was well 
above the sound card or other ADC noise floor, with and without the 
attenuation). Then see if the SNR in the FFT output has changed.
Cheers, Jim Moritz
73 de M0BMU