What do optical time domain reflectometer (OTDR) displays and controls encompass?

The optical time domain reflectometer (OTDR) is a pivotal tool in fiber optic testing, and understanding its displays and controls is essential for effectively utilizing the device. The correct choice highlights three fundamental features associated with the operation of the OTDR: range, pulse width, and measuring mode.

These controls play a crucial role in how the device performs tests on fiber optic cables.

• Range refers to the distance over which the OTDR can measure and analyze signals, allowing users to set it according to the length of the fiber being tested.

• Pulse width is significant because it determines the width of the light pulse sent into the fiber. Correctly adjusting this setting is important for resolving events at varying distances in the fiber, particularly in long or complex networks.

• Measuring mode allows the operator to select between various testing scenarios, such as fault locating or background testing, which helps in obtaining the most relevant data depending on the analysis required.

The focus on these features directly correlates to ensuring accurate and effective readings during fiber optic testing, making this the correct answer.

In contrast, while display brightness and contrast settings, battery life indicators, and environmental measurements are valuable in other contexts, they do not relate to the