Signal Notes is a user-friendly application for data acquisition, monitoring and logging using National Instrument's DAQ-systems. The software allows configuration (of the sampling frequency and voltage range) and monitoring of up to 8 differential data channels with option for data logging (time stamps and voltage levels) to a MAT-file.
Signal Notes is designed to work with bus-powered USB multifunction DAQ devices: USB-600x, USB-621x and USB-65xx series of National Instruments (tested only with USB-6211). Signal Notes operates only with the analog inputs of the device, configured in differential mode. It is not designed to work with analog outputs or digital ports.
The code is based on the theory described in:
 Data Acquisition Toolbox User’s Guide.pdf. The MathWorks Inc, 2016.
 NI USB-621x Specifications.pdf. Austin, National Instruments, Corp., 2009.
 N. Majumdar, S. Banerjee. MATLAB Graphics and Data Visualization. Birmingham, Packt Publishing, 2012.