Nokia Exam 4A0-205 Topic 4 Question 43 Discussion

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

Question #: 43
Topic #: 4

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 Sherrell at Nov 17, 2024, 01:26 PM

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Junita

3 days ago

Haha, the OSNR is like the SNR but for optics, right? I'd go with the answer that mentions both signal and noise power.

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Garry

8 days ago

Hmm, that makes sense. I see your point.

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Jonell

12 days ago

I disagree, I believe it's option D because it includes noise.

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Shayne

12 days ago

I'm going with option D. The OSNR is the ratio of the total optical signal power, including noise, to the optical noise power.

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Garry

22 days ago

I think the definition of OSNR is option A.

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Amber

24 days ago

Hmm, I think option C is the best one. The OSNR is about the ratio of the average signal power to the average noise power over a specific bandwidth.

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Johna

27 days ago

The OSNR is definitely the ratio between the optical signal power and the optical noise power. That's the most accurate definition in my opinion.

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India

23 hours ago

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

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Gail

5 days ago

I disagree, I think the OSNR is the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.

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Eveline

6 days ago

No, I believe the OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.

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Yolando

10 days ago

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

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Nicolette

12 days ago

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

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Nobuko

13 days ago

No, I believe the OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.

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Tamra

14 days ago

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

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