MEASURING DEVICE, MEASURING METHOD AND TESTING DEVICE

摘要

A measuring device measures a phase difference of transmitting signals modulated by different frequency sub-carriers that a transmitting device transmits through their channels, respectively. The measuring device comprises a signal adding unit for adding each transmitting signal to output an added signal, a sampling unit for sampling the added signal at a predetermined period of time to output a sampled signal, a signal extracting unit for extracting each sub-carrier frequency component from the sampled signal to generate an extracted signal, a phase difference calculating unit for calculating a phase of each extracted signal to measure a phase difference of each extracted signal.