OZ Optics' Intelligent Optical Signal-to-Noise Ratio Generator (iOSNRG) has been designed to allow users to inject a programmable level of noise into an optical signal, creating a precisely defined signal-to-noise ratio. All iOSNRG settings can be controlled automatically with the user-friendly touch panel or computer interface. With a built-in bandwidth adjustable tunable filter, the wavelength can be selected to be any channel within the ITU 50G Grid or any other ITU Grid. The output power level is user programmable, making this an ideal instrument for doing OSNR measurements in data communication systems. The instrument comes with GPIB, USB, and Ethernet interfaces, allowing it to be controlled by a computer, for automated testing of systems or devices.