Split ratio calculation for the MON port of the OAU board on OSN 6800

The split ratio between the MON port and the OUT port is 1:99. In other words, the optical power of the MON port is 20 dB lower than that of the OUT port, which is calculated using the following formula: Pout (dBm) �?Pmon (dBm) = 10 x lg(99/1) = 20 dB.

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