- Apr 3, 2017
The frequency resolution of the measurement is not affected, it will be 0.366 Hz (for 48 kHz sampling) in either case.
That is not how sampled data works. It is not possible to represent a frequency above 24 kHz with a 48 kHz sample rate. To avoid aliasing artefacts the system response must be as close to zero as possible at half the sample rate, ADC antialias filters and DAC reconstruction filters both have characteristics to try and achieve that. Google Shannon Sampling Theorem for more.Could you change the final frequency of the generator for verification? Instead of 24 kHz let him play up to 26 kHz. And for the graph to trim the data by 24 kHz.