Synchronization of analogue input and analogue output?

[rihns]

Hi there,

I have a signal synchronization problem:

I am sending two waveforms (i.e choice between sinus square triangle etc see attached VI) to a mechanical system and then I'm reading the acquired signal from this same system (and it should be similar).

The signal I am reading is indeed similar, however, the synchronization is not perfect. Whenever I changes the frequency of the signal the phase of the aquired signal is shiffting...

Does anyone have an idea how I should synchronize both send and aqcuired signal?

Many thanks,

Best,

Renaud

PS: I attached the VI in question 

[DCKAN]

Hi,

As you stated, there is mechanical system inbetween, it is obvious to have delay in response. If you try the same code by direct wiring Analog Input and Output, you will observe no delay in them.

Regards,

DCKAN

[rihns]

Thanks!