Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?

The highest frequency a digital oscilloscope can accurately reproduce is fundamentally limited by the sampling rate of its analog-to-digital converter (ADC). According to the Nyquist-Shannon sampling theorem, a signal must be sampled at a rate at least twice its highest frequency component to be accurately reconstructed. If the analog-to-digital converter's sampling rate is too low, the oscilloscope cannot capture enough data points per cycle. This results in an inaccurate display and a phenomenon known as aliasing, where high-frequency signals falsely appear as lower-frequency waveforms. While the ADC reference frequency affects frequency stability and timing accuracy, and the Q of the circuit affects bandwidth and resonance, neither serves as the hard mathematical limit for the maximum accurately displayed frequency.