Data Acquisition

signals to within ±20 ns.SDLCSelf-calibratingSelf-diagnosticsSerial transmissionShieldingShort haul modemShutterSISignal conditioningSignal-to-noise ratioSignal-to-noise ratioSimplex transmissionSingle-endedSmart sensorsSoftware driversSynchronous data link control. IBM standardprotocol superseding bisynchronous.A self-calibrating board has an extremely stableon-board reference that is used to calibrate A/Dand D/A circuits for higher accuracy.On-board diagnostic routine, which tests most, ifnot all, of a board’s functions at power-up or onrequest.The most common transmission mode, in whichinformation bits are sent sequentially over a singledata channel.The process of protecting an instrument or cablefrom external noise (or sometimes protecting thesurrounding environment of the cable fromsignals within the cable).A signal converter which conditions a digitalsignal to ensure reliable transmission over DCcontinuous private line metallic circuits, withoutinterfering with adjacent pairs of wires in thesame telephone cables.A mechanical or electronic device used to controlthe amount of time a light-sensitive material isexposed to radiation.International metric system of units (SystémeInternationale).Pre-processing of a signal to bring it up to anacceptable quality level for further processing bya more general purpose analog input system.The ratio of signal strength to the level of noise.The ratio of the signal amplitude to the noiseamplitude (generally both signal and noisevoltages are expressed in volts).Data transmission in one direction only.See Number of channels.A transducer (or sensor) with an on-boardmicroprocessor to pre-process input signals to thetransducer. It also has the capability ofcommunicating digitally back to a central controlstation.Typically a set of programs or subroutines