Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?
Sampling rate of the analog-to-digital converter✓Correct answer
Analog-to-digital converter reference frequency
Q of the circuit
All these choices are correct
Explanation
A digital oscilloscope reconstructs the trace from discrete samples, and the Nyquist criterion limits faithful reconstruction to frequencies below half the rate at which those samples are taken. The converter's reference sets the voltage range rather than any frequency limit, and Q describes resonant circuits, so the combined answer is wrong.