The APE function does not work

Hello, there may be the following reasons:

Cause 1: APE parameters are configured incorrectly.

Cause 2: The Optical Interface Attenuation Ratio of the APE power regulation unit has reached a critical point and can no longer be adjusted. As a result, the adjustment cannot be started.

Cause 3: Limited APE adjustment is performed and further adjustment is required.

Cause 4: The Standard Power Offset settings are insufficient to meet the requirements of the live network.

Thanks!