Patent ID: 7616007
Filing Date: 2009-11-10
Classification: G01R

Abstract:
1. An error factor measurement device that measures an error factor in a switch branch signal source comprising a signal source which generates a signal, and a switch which outputs the signal from any one of multiple output terminals, the error factor measurement device comprising: a reference error factor component recorder that records a component in an output direction (referred to as “reference output direction component”) and a component in an input direction (referred to as “reference input direction component”) of an error factor caused by frequency tracking in the switch branch signal source upon any predetermined one of the multiple output terminals being connected to the signal source; a derived error factor product recorder that records an error factor product of a component in the output direction (referred to as “derived output direction component”) and a component in the input direction (referred to as “derived input direction component”) of an error factor caused by frequency tracking in the switch branch signal source upon respective multiple output terminals other than the predetermined one of the multiple output terminals being connected to the signal source; an error factor ratio deriver that derives an error factor ratio, which is a ratio of the reference output direction component to the reference input direction component, based on records of said reference error factor component recorder; and a frequency tracking error factor deriver that derives the derived output direction component and the derived input direction component based on the error factor product recorded in said derived error factor product recorder and the error factor ratio derived by said error factor ratio deriver; wherein said frequency tracking error factor deriver derives the derived output direction component and the derived input direction component assuming that the error factor ratio is equal to the ratio of the derived output direction component to the derived input direction component.