Acq Problem: Phasejumps
Posted: Wed Aug 21, 2019 3:16 pm
Hi everybody.
I am experiencing a strange problem in acquisition of data: I read out 1buffer of Fast AI1+2 and I see phasejumps of the signal at varying positions. I am not too much concerned, if the phase jumps would arrise at the same time/sampleposition but they are obviously random.
This problem does not occur at every acq, but one time every 1-15 trys.
Does somebody have an idea how to avoid this?
I already tried different settings for sample delay, trigger channel1/2; positive edge and so on. But I would like to understand this problem.
I did try Labview and C-code on the redpitaya, but no fortune so far.
In the image you see a phase jump right at the beginning occuring in both signals, and a second time only for the red line.
thanks for your help!
best regards
Christian
edit: frequency is 12kHz; dez64; using stempab 125-14
I am experiencing a strange problem in acquisition of data: I read out 1buffer of Fast AI1+2 and I see phasejumps of the signal at varying positions. I am not too much concerned, if the phase jumps would arrise at the same time/sampleposition but they are obviously random.
This problem does not occur at every acq, but one time every 1-15 trys.
Does somebody have an idea how to avoid this?
I already tried different settings for sample delay, trigger channel1/2; positive edge and so on. But I would like to understand this problem.
I did try Labview and C-code on the redpitaya, but no fortune so far.
In the image you see a phase jump right at the beginning occuring in both signals, and a second time only for the red line.
thanks for your help!
best regards
Christian
edit: frequency is 12kHz; dez64; using stempab 125-14