Electronics Technician Second Class (ET2) Advancement Practice Exam 2025 - Free ET2 Practice Questions and Study Guide

Range-marker generators are integral to radar systems, providing timing cues that help in identifying distances to targets. The pulses produced by range-marker generators are based on the properties of the radar system, specifically the time it takes for a radar pulse to travel to an object and back, which is linked to the speed of electromagnetic waves in the air.

The correct answer outlines a commonly referenced standard timing interval used in radar applications. In radar operations, the range-marker generator typically uses the time constant of 12.36 seconds to produce the necessary range markers. This value corresponds to the periods dictated by the speed of light and the distances involved in common radar operations. When the radar system is designed, this constant will help with accurate distance measurement and target identification, making it crucial for operational effectiveness.

This timing ensures that the radar can accurately represent distances based on the travel time of the emitted pulses, helping operators make quick and informed decisions. The other durations do not align with standard radar range-marker configurations, thus reinforcing why the choice related to the 12.36 seconds constant is accurate for radar applications.