(1)Use standard optical receiving ,low noise amplifier (2) can be widely used ... used FTTB, mo technical parametersOptical characteristic performanceunitIndexInput optical powerdbm-8~+1Suggest input optical powerdbm-4~0Optical reflection lossdb≥45Optical receiving ... .LED display, sensitivity 1dBm,more easy debug.optical control AGC circuit. Input optical power in +1dBm~-8dBm ,output level will ...