Features:

• Wavelength range: 1900 to 5500 nm 
• 5 wavelength resolution settings: 0.2 to 5 nm
  Enables the user to choose the best value according to the device/system under test.
• Wide measurable level range: −60 to +13 dBm
  Suitable to measure high power as well as low power sources used in different fields of application. Sensitivity: HIGH1-3 are only high dynamic mode.
• Wavelength accuracy: ±0.5 nm
  Easily maintained due to the built-in Calibration Function and wavelength reference source.
• Close-in dynamic range: 50 dB