The automatic power equilibrium (APE) function automatically detects and adjusts the optical power of the channels on WDM-side ports to ensure the required channel optical power flatness. If flatness is not maintained at a required level due to channel optical power changes, the OSNR performance of the optical transmission line will deteriorate, which will impair and may eventually interrupt the communication. The APE function can prevent this problem.
When the optical power of channels at the receive end is not flat, the optical power of the channels must be adjusted to ensure the required optical power flatness. However, manually adjusting the optical power is not only complex but also demanding.
To ease maintenance, use the APE function to automatically balance optical power.
Limited APE adjustment is performed and further adjustment is required
- In the NE Explorer, select the desired NE and choose Configuration > Optical Power Equilibrium from the Function Tree.
- Query the Actual Power Offset and Standard Power Offset of the APE monitoring wavelength and the Power Unbalance Threshold.
- If the maximum difference between Actual Power Offset and Standard Power Offset in all monitoring wavelengths is less than 7 dB and Power Unbalance Threshold uses the default value (1.5), start the APE function again.
- If the maximum difference between Actual Power Offset and Standard Power Offset in all monitoring wavelengths is greater than 7 dB and Power Unbalance Threshold uses the default value (1.5), increase the value of Power Unbalance Threshold and start the APE function again.
Note:The Power Unbalance Threshold ranges from 0.5 dBm to 3 dBm.
- If the APE function starts successfully, set Power Unbalance Threshold to the original value.
