Recent content by bgilsdorf

Is it possible to have a gated fft to measure the distortion using a shaped single tone burst or maybe multiple to get adequate resolution. I can save a wave file and import it into the rta to access the resolution limits. I can save the output of the scope to a text file. The rta will read a...

It is actually 999 vs 1000. Changing the length of the fft seems to mask the problem

The frequency error is less than I said. Closer to 1005 vs 1000

yes if I use the sine wave generator I see the problem. I have not tried another dac, Only an external osc

The problem appears to be that the dac output is slightly shifted in frequency. 1khz is 1.01khz Is this a problem with the length of the sample, too small frequency bins. here is the ctual dac measurement.

When using the RTA for distortion analysis I find that the distortion components are not correctly Identified with some sources. If I use a battery powered wien bridge osc the identified harmonics are correct. If I use my dac (Cambridge audio magic) they are not) I can use a cursor and identify...

I just bought a new Steinberg UR22 MkII USB audio and it seem to work. But I ran a loopback measurement and the result had a fuzzy(thick) trace from about 18Khz to 20khz. I did try several sample rates 192k 96k 88k and 48k and they all exhibited a similar response. I have used other converters...