A. the signal to noise of the current optical amplifier
B. the signal to noise of the previous amplifier or source
C. the signal to noise introduced by the optical multiplexer
D. the accumulated noise to signal ratio of the optical channel
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Click the Exhibit button. Which type of multiplexer is shown in the exhibit?（）
A. Thin Film filter
B. Fiber Bragg Grating
C. Arrayed Wave Guide
D. Erbium fiber amplifier
A. none
B. -600 ps/nm
C. -200 ps/nm
D. +200 ps/nm
E. +600 ps/nm
A.0 ps/nm
B.340 ps/nm
C.200 ps/nm
D.3400 ps/nm
E.More information is needed.
A. fiber dispersion
B. signal attenuation
C. transmitter power
D. amplifier bandwidth
E. receiver dispersion tolerance
Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to （）. (Choose three.)
A. offset the OADM loss at site b
B. overcome the high multiplexer loss at site a
C. amplify signal levels after the high loss through Fiber Span 1
D. adjust add channels at site B to be at the same level as the passthrough channels
E. ensure that the per channel power is higher than the minimum needed for the post-amp at Site b
最新試題
On an ONS 15454 node you can tunnel an （）.
What are three relevant design considerations when using the 15216 EDFA? （）(Choose three.)
What protection method is used in 4F BLSR networks?（）
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)
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SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.
A Channel ID mismatch occurs when （）.
If node 2 is accepting line timing from node 1, node 2 will send （）to node 1 as its SSM message.
Which device creates an OEO conversion?（）
If the power is 0 dBm, what is the power in mW?（）