:MEASure:JITTer:NOISe:PI?

Noise PI (δ-δ) Commands

Query Syntax

:MEASure:JITTerN:NOISe:PI?

Where N identifies one of four possible jitter/noise analyses {1:4}. For example, JITTer4.

Description

Returns the Periodic Interference (PI), which is a measure of the interference that is uncorrelated to the pattern, yet is periodic. Interference caused by a switching power supply is an example of periodic interference. The value is returned for the level specified by :MEASure:JITTer:NOISe:PI:LEVel.

Dual-Dirac PI (δ-δ) is useful when the distribution is unknown. The dual-Dirac number allows various PI measurements to be compared with one another, even when the distributions are dissimilar. It is a measure of how much the PI affects the low-probability statistics of the interference.