Generating and Acquiring at the same time, DAQ USB-6356

Hello,

I have an VI how is able to read some inputs with a DAQ USB-6356 and I use a "Agilent 33522A" Waveform Generator. I want to Generate and Acquire with the DAQ.

Actually it work but not well, the frequency is not very stable and the 2nd loop didn't stop with the 1st (2nd is Generator , 1st is Acquire).

Thanks in advance

P.S my VI isn't an true state machine because I need to control it for the moment.