CSS1-MM Contractor Series Dual LED Source


  • Palm-sized, rugged, lightweight
  • Dual MM wavelengths from a single port
  • 50µm and 62.5 µm mandrels included
  • Gigabit Ethernet (GBE) ready
  • Cost-effective, easy-to-use


  • Certify 50 or 62.5 µm fiber links to TIA/EIA Standards
  • Certify Multimode fiber links for Gigabit Ethernet (GBE)
  • Test Ethernet, Token Ring, and FDDI fiber networks
  • Use 1300 nm port to test up to 10 km single-mode fiber links

Contractor Series: Palm-sized Dual LED Source

NOYES CSS1-MM is a palm-sized dual LED source weighing only 0.4 lb.

Cost-effective dual LED light source designed for performing insertion loss measurements on multimode fiber optic links when used with an optical power meter. The LED output is stabilized to ensure accurate test results per current TIA/EIA requirements.
The CSS1-MM features 850 nm and 1300 nm LED output from a single output port and is easy to operate. Each wavelength may be transmitted individually at CW or with user selectable modulated Tone. The optical output port is equipped with a fixed SC connector.
Backlit display shows emitted wavelengths [nm], tone frequency [Hz], and indicates a low battery condition. The CSS1-MM offers a five-minute auto-off feature and long battery life from common AA alkaline batteries.
The CSS1-MM is fully N.I.S.T. traceable.

Key Specifications

  • CSS1-MM Optical Port Wavelengths: 850 and 1300 nm
  • Output Power: -20 dBm, 62.5 µm multimode
  • Output Connector: SC 
  • Test Tones: 2 kHz, 1 kHz, 330 Hz, 270 Hz
  • Battery: 2 x AA Alkaline

Model Number: CSS1-MM


Prepaid Calibration Plans




2 Year  Cal Plan for CSS1-MM


2 Year  Cal Plus Plan for CSS1-MM

 For details see the Prepaid Calibrations and Calibration Plus plans product page