Patent ID: 8913650

Claim:
A device comprising: one or more components configured to: obtain, from a bit-error-rate analyzer, bit-error-rates of a signal, via a network interface, and obtain, from an optical signal analyzer, signal-to-noise ratios of the signal, via the network interface; a user interface configured to: receive a user-specified range of signal-to-noise ratio of the signal; and a processor configured to: select, from the user-specified range, a target signal-to-noise ratio for the signal, determine a target noise level based on the target signal-to-noise ratio, set a noise level of the signal to the target noise level, determine a signal-to-noise ratio of the signal via the one or more components, adjust the noise level of the signal, by an amount determined based on a difference between a noise level of the determined signal-to-noise ratio and the target noise level, to stabilize the determined signal-to-noise ratio within a particular level of tolerance with respect to the target signal-to-noise ratio, determine, responsive to the stabilization of the determined signal-to-noise ratio within the particular level of tolerance, a bit-error-rate of the signal via the one or more components, and record the determined bit-error-rate.