Akshat Agha

Hello @Fausto Thanks for your response. While debugging, I am using both the DAQs with single-ended connections (not differential). In general, I understand that a 14 bit A/D has a better resolution than a 12 bit A/D. Would that also affect the base noise and the spike that I am noticing? The signal is coming from an output box attached to a universal load frame. It is actually a force signal (50kN full scale of 10V) from a load cell. I am using a PC. The signal is grounded. There are pumps and motors in the lab but not in close proximity to the DAQ or the BNC cable. I have tried attaching the DAQ to another machine, at a different location in the lab, with a different signal source, and I am noticing the same behavior. Please advise. Thanks Akshat

Hello, I am using a MCC DAQ USB-205 to capture an analog voltage (-10 to 10V). The general noise level observed in the signal is 0.01 V, but I am noticing a sudden spike (0.05 Volt) in the signal every 4-5 seconds (Screenshot attached). I have tried the following: 1. Tried changing the AI channel connection from AI0 to AI2. Result: Same behavior was noticed. 2. Tried replacing the MCC DAQ with a new DAQ of the same model. Result: Same behavior was noticed. Please see the attached screenshots for the two DAQ signals. 3. The signal was split from the source into two parts and captured simultaneously with a NI DAQ USB-6001. The NI DAQ is showing a much smoother signal with no spiked. What could be the cause of this problem and how to resolve it? Please advise. Thanks Akshat