Patent ID: 8743934
Filing Date: 2014-06-03
Classification: G01R

Abstract:
1. A signal measurement device, comprising: a plurality of mixers that each output a signal having a frequency equal to a difference between two input frequencies; a single local signal source that feeds a common local signal input to the plurality of mixers; a difference measurement unit that measures a level difference and a phase difference between outputs of the plurality of mixers when a common correction signal input is fed to the plurality of mixers; a level/phase measurement unit that measures the level and the phase of the output of each of the plurality of mixers when each common local signal input to be measured has a common frequency and each common local signal input to be measured is fed to the plurality of mixers; and a difference correction unit that corrects a measurement result of the level/phase measurement unit based on a measurement result of the difference measurement unit when the common local signal input to be measured is fed to the plurality of mixers.