LAB WM428 - Power - Real And Apparent

A Tutorial On Basic Line Power Measurements.
LeCroy Application Brief No. LAB_WM 428

Power - Real And Apparent
A Tutorial On Basic Line Power Measurements
Oscilloscopes measure current confusion. The Power Measure digital, are voltage responding
and voltage and, through the Analysis (PMA2) software pack- instruments. Current is meas-
magic of mathematics, calculate age simplifies these measure- ured using a suitable transducer,
power. Unfortunately, power ments and eliminates the neces- usually a current probe or resis-
comes in a large number of sity of setting up the proper math tive shunt. The oscilloscope dis-
guises: instantaneous, real, ap- operations. play is the instantaneous func-
paren