Hi all,
I am having a doubt on the difference of digital line output in traditional DAQ and DAQmx. I know traditional DAQ is pretty old but I just switch to DAQmx from the traditional DAQ and I found something pretty strange. I have 3 digitial lines sending 3 TTL "1" to trigger 3 external shutters. With traditional DAQ, all 3 TTL "1" are going in about the same times so I hear like "1" strong click (actually there are 3 clicks but the shutter open about the same time). Now I switch to DAQmx, I use the same card, same channel and same lines and triggering the same shutters. Again, they all opened at about the same times but what I hear is pretty soft clicks. It is that soft and easly distinct from the previous strong one. I wonder if there is any difference between the TTL signal sent by DAQmx and traditional DAQ. Well, I think TTL signal should not be changed by using different drivers but I really don't know why cause the difference.
