Nose-to-nose oscilloscope calibration phase error inherent in the sampling circuitry

We use SPICE simulations to study the dependence of the phase error in the nose-to-nose oscilloscope calibration on the oscilloscope´s sampling circuitry. We determine which components of the internal sampling circuitry of the oscilloscope contribute most significantly to errors in the nose-to-nose calibration. We then predict an expected range of phase errors from a range of realistic component values.