How to do when there is a lot of error on Huawei OSN 3500 N2SL64 board.
Check the performance of the circuit board to see if the laser power is in the normal range (between the overload point and the sensitivity).
Check the replacement of DCU single board, to see whether the dispersion decay can solve the problem.
Performance of query related BPA. The input power of the two ports of the V-64.2b single board should exceed - 26dBm (1dB margin).
Through the above steps, it is found that the sensitivity, dispersion or distortion is the cause of the problem.
For distortion, to see whether the other side of the error, if there is a bit error, it is better to use the optical fiber or BPA (such as the use of BPA-17 instead of BPA-14).
If there is no error in the other side, the reason for the excessive attenuation (the error of long distance optical fiber 1dB to 3dB is normal), fiber optic connectors, optical fiber or fiber optic connectors are likely to lead to excessive attenuation.
Huawei OSN3500 optical transmission equipment STM-64 signal is very sensitive, long-distance projects need to pay special attention to the circuit board of the sensitivity (BPA), fiber dispersion use (DCU) and distortion (laser power shall not be lower than the -27dBm), check every detail to eliminate the error is very necessary