PAR METER

Abbreviation for peak-to-average ratio meter . A meter used to measure, calculate, and display the ratio of the peak power level to the time -averaged power level in a circuit , i.e. , the peak-to-average ratio ( p / a r). ( 188 ) Note 1: A par meter is used as a quick means to identify degraded telephone channels. Note 2: A par meter is very sensitive to envelope delay distortion . The par meter may also be used for idle channel noise , nonlinear distortion , and amplitude-distortion measurements. Note 3: The peak-to-average ratio can be determined for many signal parameters, such as voltage, current, power, frequency , and phase .