Nokia Exam 4A0-205 Topic 5 Question 45 Discussion

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

Question #: 45
Topic #: 5

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 Yolando at Jan 15, 2025, 05:41 AM

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Estrella

6 days ago

Haha, OSNR? More like 'Oh, So Noisy, Really!' Am I right or am I right?

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Ahmed

10 days ago

I think D is the right answer. It clearly defines OSNR as the ratio of total optical signal power (including noise) to optical noise power.

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Catarina

12 days ago

Option C seems to be the most accurate definition of OSNR. It specifically mentions the ratio between signal and noise power over a specific bandwidth.

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Melissa

14 days ago

I think the definition of OSNR is option A.

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