Anritsu MT9090A – Optical Channel Checker system (MU90902A)

The Anritsu MT9090A is a modular optical channel checker system that delivers field-verified optical power and wavelength measurements across CWDM/DWDM networks. Built on an interchangeable mainframe architecture, it accepts multiple specialized modules - optical channel analyzer, µOTDR, and Gigabit Ethernet - enabling technicians to configure a single platform for diverse testing requirements. The MU909020A optical channel analyzer measures and monitors power and wavelength across all 18 CWDM channels per ITU-T G.694.2 standards, with ±1 nm wavelength accuracy and a ±6.5 nm passband.

Ready for measurement in approximately 15 seconds with no moving parts, it delivers cost-effective CWDM verification without the complexity of traditional optical spectrum analyzers. The system features a high-resolution color display and graphical user interface for rapid data interpretation across field environments. Threshold testing - pre-stored or user-defined per ITU-T G.695 - enables Go/No Go validation.

Long-term characterization is supported through integrated drift functions. Battery operation provides 4 hours of continuous testing per charge, ensuring extended field deployment without external power.

Technical Specifications

• Optical Channel Analyzer Module (MU909020A): 18-channel CWDM measurement and monitoring


• Wavelength Accuracy: ±1 nm


• Channel Passband: ±6.5 nm (ITU-T G.695 compliant)


• Power Measurement Range: +10 dBm to −30 dBm per channel


• Measurement Ready Time: ~15 seconds


• Power Meter Mode: Total incident power measurement capability


• Battery Runtime: 4 hours typical per charge

Key Features

• No moving parts for rapid, repeatable measurements


• Pre-stored and user-defined threshold values supporting ITU-T G.695 compliance


• Long-term drift characterization functions


• Modular design supporting OTDR, Ethernet, and additional specialized modules

Typical Applications

• CWDM/DWDM channel validation and power verification


• Field technician optical network troubleshooting


• Real-time optical power and presence monitoring

Compatibility & Integration The MT9090A mainframe integrates optional µOTDR modules (MU909014x/15x series) and Gigabit Ethernet test modules (MU909060A series), supporting expanded testing workflows across optical and packet transport networks.