GREENLEE 570XL Multimode LED Source with FC, SC, or ST Interface and Dual Output 850/1300nm

The 570XL is Your Best Choice Light Source for Testing Fiber Optics

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What's special about this Fiber Optic Tester?

  • Three connector interfaces to chose from: Fixed FC, SC, and ST connector interface
  • LED source provides continuous wave and modulated output
  • Two AA batteries last an average of 80 hours of continuous use
  • 850/1300nm wavelengths
  • Click for More Features

The 570XL is designed for the technician to perform installation and maintenance measurements on fiber optic cabling networks. In addition, the 570XL is also made to precisely measure power levels and link loss on multimode and single mode cabling networks. This all purpose fiber optic instrument is easy to used and reasonably priced for anyone performing fiber optic installation and maintenance.


GL-570XL-FC 850/1300nm LED Source w/FC Interface
GL-570XL-SC 850/1300nm LED Source w/SC Interface
GL-570XL-ST 850/1300nm LED Source w/ST Interface
GL-1062 SC/PC SOC Adaptor
GL-946 Adaptor Cleaning Rods/ 10 Pk
GL-948 Connector Reel Cleaner
  • Stable calibrated output
  • Automatic shut-off switch
  • Rugged, water-resistant housing
  • 1 year manufacturer warranty
  • Made in the USA


The 570XL can be purchased with one of three different fiber optic connectors (FC, SC, ST) depending in the type of fiber optic job. The 570XL is the perfect light source for performing insertion loss testing on multimode fiber optic cabling. Dual wavelength output provides quick and precise insertion loss measurements. Once the user has set the reference with an optical power meter, the 570XL LED source provides a stable output for hours of continuous measurements. The 570XL-FC LED source is configured for FC fiber optic connectors, the 570XL-ST LED source is configured for ST fiber optic connectors and the 570XL-SC LED source is configured for SC fiber optic connectors.

This product has 3 interfaces (FC, SC, and ST) that can be pigtailed together with an adapter, but the connection won’t be as good and the results skewed.

Center Wavelengths 850nm 1300nm
Power Range 840nm to 880nm
1270nm to 1345nm
Max. spectral width 55nm 150nm
Stability (1 hour) ±0.05 dB ±0.05 dB
Typical power output


Modulation frequency 270 kHz, 1 kHz and 2 kHz 270 kHz, 1 kHz and 2 kHz
Power Requirements Two AA size 1.5V batteries (approx. 80hours continuous operation)
Connector interface FC, SC or ST FC, SC or ST


Operating Temperature
Storage Temperature
-15°C to +55°C
-35°C to +70°C
0 to 95% non-condensing
Dimensions 7.2 x 14.2 x 3.5 cm (2.8 x 5.6 x 1.4 in.)
Weight 241g (8.5 oz.)
CE EN61010; EN50081-1: 1992; EN55011, Group 1, Class A
EN50082-1: 1992 IEC 801-2, -3, -4

This product uses & test light waves. It does not use electricity and therefore is not UL rated.







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