Data Acquisition

circuit elements.Synchronous transmissionTalkerTCP/IPTDMText modeThresholdingTime sharingTransducerTransientTransmission in which data bits are sent at a fixedrate, with the transmitter and receiversynchronized. Synchronized transmissioneliminates the need for start and stop bits.A device on the GPIB bus that simply sendsinformation onto the bus without actuallycontrolling the bus.Transmission control protocol/internet protocol.The collective term for the suite of layeredprotocols that ensures reliable data transmissionin an internet (a network of packet-switchingnetworks functioning as a single large network).Originally developed by the US Department ofDefense in an effort to create a network that couldwithstand an enemy attack.Time division multiplexer. A device that acceptsmultiple channels on a single transmission line byconnecting terminals, one at a time, at regularintervals, interleaving bits (bit TDM) orcharacters (character TDM) from each terminal.Signals from the hardware to the display deviceare only interpreted as text characters, leading toa maximum resolution defined by the number ofcharacters across a screen by the number ofvertical lines. Text mode can be faster thangraphics mode, but the resolution and the type ofgraphics that can be displayed are limited by thetext character set.The process of defining a specific intensity levelfor determining which of two values will beassigned to each pixel in binary processing. If thepixel’s brightness is above the threshold level, itwill appear in white in the image, if it is below thethreshold level, it will appear black.A method of computer operation that allowsseveral interactive terminals to use one computer.Any device that generates an electrical signal fromreal-world physical measurements. Examples areLVDTs, strain gauges, thermocouples and RTDs.A generic term for sensors and their supportingcircuitry.An abrupt change in voltage of short duration.TriggerA rising edge at an 8254 timer/counter’s gate