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RS-232 Wiring and Connector Diagrams
RS-232 is widely used for connections between data acquisition devices and computer systems. RS-232 devices are defined as either DTE (usually a computer) or DCE (usually an interface device).
Data Noise Reduction in DAQ
Noise is unavoidable in PC based data acquisition systems. There is board induced noise which can be measured by shorting an analog input to ground and taking a series of readings and plotting them in a histogram.