09-17-2012 08:51 PM
I use DAQ with photodetector to see light intensity change in Biosensing system.
I set sampling rate to 1KS/s and +10 to -10 voltage range.
As you can see in the graph(upper one) I attached, there are signals like impulse ( they are exactly 10mV)
That signals are always exist on the some voltage level.
I don't know what it is. I guess that are not noises because that have exactly 10mV.
09-18-2012 07:16 AM
In single ended mode the USB-6008 has a resolution of 9.766 mV. The system noise is specified as 5 mV rms. It is not unreasonable to expect that you are seeing an occasional 1 LSB jump due to noise.
I would consider this normal for that device.
Lynn