The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be - 8dbm, and the input optical power of the IN port of the OAU single board is?

The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be – 8dbm, and the input optical power of the IN port of the OAU single board is?

The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be – 8dbm, and the input optical power of the IN port of the OAU single board is?
A . -11dbm
B. -13dbm
C. -15dbm
D. -21dbm

Answer: A