Precautions for commissioning the TN12OBU1P board of OSN 8800

The working principle of the TN12OBU1P1 board is as follows: The attenuation of the built-in VOA before the IN port on the TN12OBU1P1 board cannot be manually adjusted. The board controls the input optical power.
When the sum of the input optical power on the IN port plus 20 dB (gain) is greater than 7 or 9 dBm (maximum output power of the board, depending on the version), the board software automatically increases the attenuation of the built-in VOA to ensure that the output optical power is 7 or 9 dBm.
When the sum of the input optical power on the IN port plus 20 dB (gain) is less than 7 or 9 dBm (maximum output power of the board, depending on the version), the board software adjusts the attenuation of the built-in VOA to the minimum value to obtain an output optical power value that is as high as possible.
The TN12OBU1P1 board is a commissioning-free board. In addition, the input optical power of the board is not locked. Instead, the gain is locked to 20 dB for the board.

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