Specification:

• Measurement Wavelength range:  600 nm - 1800 nm      
• Display units: nm, cm-1 or GHz, air or vacuum 
• Display: Absolute wavelength or deviation from a set point 
• Measurement wavelength accuracy: 1 ppm
• Input attenuator Automatic, 0-2 OD 
• Input aperture for free air laser: 2 mm 
• Input beam height  for free air laser: 7.0" (± .3" adjustable)                                                
• Optical fiber Input connector:  FC connector