signal averagingsignal comparatorsignal conditionersignal contrastsignal conversionsignal convertersignal data convertersignal detectorsignal distancesignal distortionsignal flow graphsignal frequency shiftsignal generatorsignal injectionsignal intelligencesignal levelsignal lightsignal output currentsignal platesignal powersignal processingsignal regenerationsignal restorationsignal separation filtersignal sequencesignal shaping networksignal sourcesignal stabilizationsignal strengthsignal strength meter s meter s unit metersignal substitutionsignal swingsignal to distortion ratiosignal to noisesignal to noise ratiosignal tracersignal tracingsignal transmissionsignal voltagesignal wave envelopesignal wave signalsignal windingsignalingsignaling channelsignaling communicationsignaturesignificant digitsignificant figuressignifivant digitsignum function
