Check the listing for details. EXFO FiberBasix ELS-50-23BL Light Source & EPM-53X Optical Power Meter EXCELLENT. Condition: Used. Listed at 1100.00 USD. These products are part of EXFO's series of FTTx optical test products that enable testing of passive optical networks (PONs) at the three main wavelengths (1310, 1490 and 1550 nm) used in fiber-to-the-home (FTTH) and fiber-to-the-premises (FTTP) networks and comply with the ITU-T G.983 and G.984 Recommendation series and the IEEE 802.3ah standard. The ELS-50-23BL calibrated Light Source incorporates laser diodes that emit at 1310 and 1550nm wavelengths with output power of -5 dBm. The EPM-53X Optical Power Meter has a power range of -50 to 26dBm, at calibrated wavelengths of 850, 1,300, 1310, 1490, and 1550. Together they are used for testing loss in single mode fiber optic link cables, or individually to measure optical power and loss of individual fiber optic devices. The units come with protective cloth cases and FC connector adapter. The ELS-50 Model 23B Light Source features: · a rugged design · excellent power stability for reliable loss measurements · interchangeable connectors interface · up to 60 hours of battery life · interchangeable connector adapters · tone generation for fiber identification The EPM-53X Power Meter features: · a rugged design · interchangeable connector adapters · 300 hours of battery life · tone recognition for fiber identification · universal push-pull interface · reference function for direct loss measurements