What is a key feature of a dual trace oscilloscope compared to a single trace oscilloscope?

A dual trace oscilloscope is specifically designed to simultaneously display two signals, which is its primary advantage over a single trace oscilloscope that can only show one signal at a time. This capability allows users to compare two signals directly on the same visual display without the need to switch between them, providing a clearer understanding of their relationship, timing, and characteristics.

While the option discussing alternate sweeps does describe a feature of some dual trace oscilloscopes, it doesn't capture the full essence of the primary distinguishing function of these devices. The ability to show both signals at once not only enhances the analysis but also saves time during troubleshooting or testing.

The other features mentioned, such as increased voltage capacity or higher frequency response, do not inherently differentiate dual trace oscilloscopes from single trace models, as these specifications can vary independently of the number of channels the oscilloscope can display. Thus, the hallmark of a dual trace oscilloscope lies in its ability to present two signals concurrently, making it a powerful tool for complex electronics diagnostics and analysis.