Nokia Exam 4A0-205 Topic 3 Question 51 Discussion

Actual exam question for Nokia's 4A0-205 exam

Question #: 51
Topic #: 3

What is the definition of OSNR?

AThe OSNR is defined as the ratio between the transmitted optical power and the received optical power over 1 km of fiber including both signal and optical noise.

BThe OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.

CThe OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.

DThe OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.

Show Suggested Answer

Suggested Answer: C

The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth. This is also known as the signal-to-noise ratio (SNR), and it is a measure of how much signal is present in the optical signal compared to the noise, usually expressed in decibels (dB).

by Jolanda at May 04, 2025, 05:07 AM

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