Time shift of two AD2 Wave Generators.

[Marvin1]

Hi there,

I am running two Wave Generators AD2 to send signals simultaneously using the python SDK from a Raspberry Pi.
The settings for the generators (and channels) are all the same.

I trigger them and they start running at the same time. 
However, over time, they will stop running synchronous.

At ~25 min run time, they show a time shift of approx. 1.7 ms. This leads me to believe that there is a slight inaccuracy in the frequency.

My current solution is to retrigger after every signal (resetting the device and loading new signal into buffer, then letting buffer cycle run). That leads to slight pauses which I would like to avoid.

Did anyone else encounter that problem and is there a way to fix this? Can both devices be connected in a way that they run on a single clock?

Thanks and warm regards,

Marvin

 

Edited August 16, 2023 by Marvin1
missing minute in run time spec

[attila]

Hi @Marvin1

See the WF SDK/ samples/ py/ AnalogOut_Sync.py AnalogOut_Phase.py examples
Use the least common multiple of signal periods for FDwfAnalogOutRunSet and use FDwfAnalogOutRepeatSet 0 for infinite repeat.