The two purposes of amplification for digital systems are (i) to improve signal-to-noise ratio and (ii) to make good use of the dynamic range of the digitizer; in other words, to ensure the best resolution possible.
(i) The NI 9229 digitizing module is a 24 bit system. Express this value in terms of counts and the dynamic range terms of decibels. Show your derivations and calculations.
(ii) Consider a signal of 10 mV with a noise level of 0.1 mV. The signal is amplified 500 times. Determine the SNR in terms of decibels. Show your derivations and calculations.
(iii) For this 24-bit, 0–10 V digitizer, express a 4 mV signal in terms of counts. Show your derivations and calculations.