Abstract: We introduce a method for 50 GHz comb generator calibration using Agilent 86100C sampling oscilloscope. The 70 GHz sampling head measures the output time-domain signal of the comb generator. Then we correct the signal for time base error, including time base distortion, jitter and drift. By transforming the time-domain signal into frequency-domain, we obtain the amplitude and phase spectrum. Then we acquire the calibration data we need. We also determine the uncertainties of the amplitude and the phase, which are less than 0.5 dB and 0.9° respectively.

Key words: Comb generator, Sampling oscilloscope, Phase calibration, Uncertainty