The XGS-1577 XGSPON Power Meter measures upstream and downstream PON wavelengths simultaneously across EPON, BPON, GPON, XG-PON, and XGS-PON networks. Featuring a bright color LCD, data storage for 1,000 results, and up to 90 hours of battery life, it's built for reliable. The Jonard Tools XGS-1577 passive optical network power meter is a high-performance diagnostic tool designed for fiber optic professionals working across a range of PON technologies. With support for 1270 nm and 1310 nm upstream wavelengths, and 1490 nm, 1550 nm, and 1577 nm downstream wavelengths, this. AFL's FlowScout Downstream PON Power Meter (DPPM) is designed to automatically detect and simultaneously measure coexistent downstream PON power levels at 1490 nm GPON/EPON and either 1550 nm RF video or 1577 nm XG/XGS/10GEPON. This optical power meter with separated wavelengths 1490/1550/1577nm are mainly used for the installation, test and maintenance of FTTH optical. VFL 30Mw 1577/1490 Nm:Equipped with a versatile 30Mw VFL for efficient network troubleshooting. Power Meter Functionality 10G PON Optical Power:Designed for 10G PON networks, this meter measures optical power precisely.