Data Acquisition

MultiplexerMultiplexer (mux)Negative true logicNetworkNetwork architectureNetwork layerNetwork topologyNMRRNodeNoiseNRZA technique in which multiple signals arecombined into one channel. They can then be demultiplexedback into the original components.With the addition of multiplexing panels, 64, 256,sometimes more, inputs can be fed to a single 16-channel board. This results in a slower samplerate (throughput), but allows very large dataacquisition systems to be constructedeconomically.A device used for division of a communication linkinto two or more channels, either by usingfrequency division or time division.The inversion of the normal logic where thenegative state is considered to be TRUE (or 1) andthe positive voltage state is considered to beFALSE (or 0).An interconnected group of nodes or stations.A set of design principles, including theorganization of functions and the description ofdata formats and procedures, used as the basis forthe design and implementation of a network(ISO).Layer 3 in the OSI model; the logical networkentity that services the transport layer responsiblefor ensuring that data passed to it from thetransport layer is routed and deliveredthroughout the network.The physical and logical relationship of nodes in anetwork; the schematic arrangement of the linksand nodes of a network typically in the form of astar, ring or bus topology.Normal mode rejection ratio – The ability of aboard to filter out noise from external sources,such as AC power lines. NMRR filteringcompensates for transient changes in the incomingsignal to provide greater accuracy. The higher theNMRR, the better the filtering of incoming datawill be.A point of interconnection to a network.Undesirable interference superimposed upon auseful signal reducing its information content.Non-return to zero. Pulses in alternatingdirections for successive 1 bits; no change fromexisting signal voltage for 0 bits.