Patent ID: 7157692

Claim:
A fiber optic tester operable to test an optical circuit having a plurality of termination points, the tester comprising: a plurality of light ports operable to transmit and receive light, each light port comprising a light transmitter operable to transmit the light, a light receiver operable to receive and convert the light into a receiver voltage, a light monitor operable to receive and convert the light into a monitor voltage, and a coupler operable to split the light transmitted from the light transmitter between the light monitor and one of the termination points; a processing unit operable to analyze differences between the receiver voltage and the monitor voltage, wherein the processing unit compensates for internal characteristics of the fiber optic tester and interface characteristics when analyzing the differences between the receiver voltage and the monitor voltage; a testing unit operable to measure a differential voltage between the receiver voltage and the monitor voltage; and an analog bus operable to connect each light receiver and each light monitor to the testing unit in a sequence controlled by the processing unit.