Which of the following statements about incident optical power commissioning are true? (Choose all that apply.)
A.
If the output optical power of the downstream OA does not meet requirements in the case of the minimum gain, reduce the attenuation value of the upstream EVOA first to a value within the range required by incident optical power counters.
B.
If the output optical power of the downstream OA still does not meet requirements, increase the gain of the downstream OA.
C.
By default, the incident optical power of each optical fiber is the special incident optical power (high power).
D.
If the output optical power of the downstream OA meets requirements in the case of the minimum pain, the upstream incident optical power cannot be lower than the incident optical power counters.
Ensuring the downstream OA’s input is within the specified range by first reducing upstream EVOA attenuation is the standard first step when output power falls short at minimum gain.
If adjusting the EVOA does not bring the OA’s output into spec, increasing the OA’s gain is the next appropriate action.
When the OA meets output requirements at its minimum gain setting, the preceding fiber’s incident power must be at or above the lower limit defined by the incident-power specifications.
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