Model: TM581 PON Power Meter Measurement Range (dBm): 35 to 10 dBm; 40 to 12 dBm; 40 to 25 dBm Wavelength (nm): 1310 ± 50 nm; 1490 ± 15 nm; 1550 ± 10 nm Purpose and benefits: In PON networks, it can avoid offline tapping by online sampling of a small portion of the optical signal, enabling testing across the full FTTx service opening, maintenance, and detection stages. This helps reliably verify network communication requirements. Key capabilities: Simultaneous testing of optical power for voice, data, and video signals Threshold warning when power exceeds preset limits Designed to support common PON/FTTx deployment scenarios Use scenarios: 1) Field installation and commissioning of PON/FTTx networks, enabling quick, multichannel power readings and early threshold alerts. 2) Inservice maintenance and fault localization in existing PON infrastructure without interrupting service. 3) Verification and acceptance testing during network upgrades or service openings to ensure optical power meets specifications. Compatibility and performance notes: Suitable for PON power measurement across the stated wavelengths and ranges, providing reliable verification of network communication requirements during engineering, construction, and maintenance activities.