Certified Fiber Optics Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Certified Fiber Optics Exam. Utilize flashcards and multiple choice questions with hints and explanations. Get ready to excel!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What axis on an OTDR displays power measurements?

Horizontal Axis
Vertical Axis
Both Axis
Neither Axis

The correct answer is: Vertical Axis

The vertical axis on an Optical Time-Domain Reflectometer (OTDR) displays power measurements. This axis represents the optical power level, typically expressed in decibels (dB), which indicates the strength of the reflected light signal as it travels through the fiber optic cable. In the context of using an OTDR, understanding the vertical axis is crucial because it helps technicians gauge the performance of the fiber optic link, diagnose faults, measure loss over distance, and assess overall signal integrity. By observing the readings on this axis, operators can make informed decisions about maintenance and troubleshooting of fiber optic systems. The horizontal axis, on the other hand, usually represents distance along the fiber, allowing the user to correlate variations in power with specific points in the fiber run. Therefore, while the horizontal axis is essential for understanding location and distance, it does not display power measurements.