What are the two traces displayed on an A scope?

The correct answer indicates that the two traces displayed on an A scope are the main sweep and precision sweep. The main sweep typically represents the primary data collection or analysis being performed on the signal under observation, providing an overview of the behavior or characteristics of that signal over time. In contrast, the precision sweep allows for more detailed examination and accuracy in specific regions of the signal, facilitating deeper analysis where high fidelity is crucial.

This separation into main and precision sweeps is essential in various applications, particularly in situations where changes in the waveform need closer scrutiny without losing the overall context provided by the main sweep. The ability to display both traces allows for effective signal analysis, helping technicians and engineers discern details that could be overlooked if only a basic trace were displayed.