DEVICE AND METHOD FOR MEASURING HIGH FREQUENCY SIGNAL POWER

摘要

Measuring device comprises a dither injection unit (11) arranged between a detector (2) and an analogue/digital converter (6) for injecting a dither signal. The dither injection unit injects the dither signal synchronously to a chopping signal. An independent claim is also included for a measuring method for measuring the power of a high frequency signal using the above device. Preferred Features: The dither signal is a constant signal. The time duration, during which the dither signal is constant, corresponds to the period duration of the chopping signal or a complete multiple of it. A synchronous demodulator (14) is arranged between the analogue/digital converter and an evaluating unit (8, 9) and operates synchronously to the chopper (10).