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Question 80 - H35-260 discussion
After a certain distance transmission in the wavelength division system, the optical signal-to-noise ratio of the signal at the receiving end will decrease to a certain extent. The main reason is which of the following?
A.
Use of EDFA
B.
Use of demultiplexer
C.
No new fiber is used
D.
Fiber attenuation is too large
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