I am sending a 5-cycle tone-burst with central frequency of 60kHz through a simple plate structure (clamped-free). I have 3 PZT sensors: PZT2 sends the tone-burst, located on the left extreme, PZT4 in the middle of the plate and PZT6 on the extreme right.
For synchornized generation and acquisition I am using an altered version of the Multi-Function-Synch AI-AO.vi. The signals acquired from the 3 PZTs are correct, with the exception of the initial portion of the signal, where the tone-burst seems to be coincident with the waveforms - see image attached. In other words, for PZT4 and PZT6 it is not expected to see the tone-burst at time 0, it should take at least 0.1 milliseconds to reach PZT4. This means there is some type of initial interferece.
I've tried inserting delays on the generated tone-burst and several other options, but this continues to happen. At this point I am not sure if it is a hardware interference or due to the synchronized example code.
Any help would be appreciated.
Cheers.