Which function generator front panel control modulates both amplitude and frequency?

The function generator's front panel control that modulates both amplitude and frequency is indeed the mod switch. This control is designed to apply modulation to the waveform being generated, allowing both the amplitude and frequency of the output signal to change dynamically based on an external input or predefined parameters.

Modulation is a fundamental concept in signal processing where a carrier signal is varied in amplitude, frequency, or phase based on a modulating signal. The mod switch's capability to affect both aspects enables users to create complex waveforms that can simulate various types of signals used in communications, audio applications, and other electronic systems. This is particularly useful for testing and experimentation purposes.

In contrast, other controls on the function generator primarily focus on managing either frequency or amplitude independently. The frequency switch typically changes the frequency setting but does not incorporate amplitude adjustments, while the amplitude control specifically adjusts only the output's amplitude without affecting its frequency. The waveform generator itself refers to the overall device rather than a specific control for modulation.