Hi Leo,
First of all thanks for your reply! It is a bit of a problem sincei want the modules to be sampling at same frequency to have the same signal length. I didn't think about the crystal! I'll check it and see what happens. 
Hi Leo,
First of all thanks for your reply! It is a bit of a problem sincei want the modules to be sampling at same frequency to have the same signal length. I didn't think about the crystal! I'll check it and see what happens.