User manual

UniversitàdegliStudidiCatania
IntroductiontoNILabVIEW
 DAQ:signals&information
Asignalisclassifiedasanalog ordigital bythewayitconveysinformation.
• Adigital(orbinary)signalhasonlytwopossiblediscretelevels—highlevel(on)orlowlevel
(off).
• Ananalogsignal,ontheotherhand,containsinformationinthecontinuousvariationofthe
signalwithrespecttotime.
Strictly speaking, all signals are analog time‐varying signals. However, to discuss signal
measurement methods, you should classify a given signal as one of five signal types.
DIEEI