Methods and equipment for metrological certification of phase-measuring equipment

The paper analyzes the main components characterizing the accuracy of phase measurement methods: — basic error, at equal levels of the signals under study; — amplitude-phase error at unequal levels of the signals under study. The hardware for determining these error components is: — a developed microcontroller two-phase phase calibrator based on DDS generators, the accuracy of setting phase shifts of which in the frequency range of up to 1 MHz is hundredths of a degree; — a calibrated attenuator D2-31 with fixed attenuation values of 10 dB, providing a phase error at a frequency of 1 MHz of no more than 0,03º.