... 1.Multi wavelength outputaa 2.Adjustable outputaa power 3.Tone generation, 270HZ,330HZ, Adjustable Light Source Testing Instrument Features ... Multi wavelength outputl Adjustable outputl power Tone generation, 270HZ ... Power(dBm)-5~-7Adjustable Step(dBm)<0.5Adjustable Range≥5Stability(dB,30min,20°C)0.15Modulation(Hz)CW ...