If the value of Rx Optical Power is less than the receiving sensitivity, adjust the link or replace the optical module or optical fiber at the remote end; if the value of Rx Optical Power is too high, add an optical attenuator. MCA boards and OSA analyzer, don't give the real values of power and OSNR of 40G and 100G coherent lambdas, so it is necesary calculate this values, using that values that OSA gives to calculate and setting the correct parameters to it. For this specific case, the OSA used is the JDSU 8000 series. The QSFP+ transceiver converts 4 inputs channels of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/ optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM. How to solve the optical power alarm of optical module in equipment? When we use the optical module, sometimes improper use will lead to abnormal operation of the optical module, so in this case, how should we solve it? Today, ETU-LINK will tell you an answer. The intermediate station adjustment method is recommended. 00 // optical module receiving power alarm limit RX Power Low Threshold (dBM): - 16.