⭕ Burleigh WA-7600 Multi Wavelength Optical Wavemeter. This unit comes with a fresh calibration. The Burleigh WA-7600 and WA-7100 Optical Channel Analyzers employ proven scanning Michelson interferometer-based Wavemeter technology to determine the absolute wavelength of an optical signal under test by comparing its interference fringe pattern with that of a built-in HeNe laser wavelength standard. Unit ensures the highest accuracy. Combining proven scanning Michelson interferometer-based technology with advanced digital processing results in the ability to measure and differentiate the absolute wavelengths of up to 256 discrete optical signals. The accuracy of these measurements is ± 0.3 ppm. Whats more, the WA-7600 can simultaneously measure the individual powers of the optical signals and it offers an absolute wavelength uncertainty of ± 1.5 ppm. Very clean cosmetic condition and unit is in fully operational order. Can manage to ship or local pickup.