WP_Differential_MeasurementsWHY DIFFERENTIAL? Voltage, The Difference instruments connected to the circuit under test and Whether aware of it or not, a person using an results in VCOMMON. oscilloscope to make any voltage measurement is actually making a differential voltage measurement. What the scope actually displays on screen is a By definition, voltage is the measure of the difference voltage waveform that appears as the difference of electric potential between two points. The concept between the voltage at the center conductor of its of voltage being the difference of potential between input connector and the connector's ground or vC-G. In two points is easily understood by a person using a most cases, the displayed waveform, vC-G, is f……