Patent ID: 8525981

Claim:
A method, comprising: injecting a test signal having a first optical launch power into a device under test via an optical splitter, wherein the optical splitter includes at least two upstream ports and at least two downstream ports, wherein the test signal is injected in a first upstream port of the optical splitter, and wherein the device under test is coupled to a first one of the at least two downstream ports; receiving the test signal at a launch power monitor coupled to a second one of the at least two downstream ports; measuring the optical launch power of the test signal by the launch power monitor; determining whether the measured optical launch power matches test parameters for the test signal; adjusting the injected test signal when the measured optical launch power does not match the test parameters; measuring return loss (RL) associated with the device under test at a second upstream input of the optical splitter; storing the RL measurement in a database; and repeating the injecting, measuring, and storing for a number of different optical launch powers.