The Viavi 2301/12 COSA-4055 CWDM Analyzer Module is part of a new generation of coarse wavelength division multiplexer (CWDM) analyzers. Until now, large and expensive optical spectrum analyzers (OSA) were used to precisely test wavelength and power levels in CWDM networks, and optical channel checkers were used to verify optical channel presence. The VIAVI COSA-4055 module offers the functionality and speed of an OSA in a handheld form factor.

Housed in a T-BERD/MTS-2000, -4000 V2, or -5800 platform (platform sold separately), the VIAVI COSA-4055 is the ideal handheld CWDM analyzer for field service groups to install, maintain, and upgrade CWDM systems.

Ease of Use

One-button auto-testing guarantees that a technician needs no special training to carry out a CWDM test, making the VIAVI instrument suitable for both novice and expert technicians. An Auto-Test mode automatically identifies WDM channels, selects the appropriate wavelength range, and provides auto scaling and system qualification according to pre-defined parameters.

Flexible Measurement Capability

In-depth analysis, featuring statistical, continue or single evaluation with automatic storage capabilities, is provided. Different measurement functions such as automatic channel detection, and pass/fail analysis against usersettable limits are available on the COSA-4055.

Furthermore, its tunable channel grid allows not only to measure according to the ITU-T G.694.2 CWDM wavelengths but also to use your own customized grid.

Drift Measurement for Wavelength and Power

For optical performance monitoring it is essential to measure the key parameters over time. The built-in drift test application provides the result of power and wavelength over a customer definable time in a graphical and numerical format. Drift measurements are important in CWDM networks with uncooled laser, which have a typical wavelength drift of 0.1 nm/°C.

SFP Slot for CWDM Transceivers

The COSA-4055 provides an integrated SFP slot to host up to 2 SFP CWDM transceivers. The transceivers can be used to simulate CWDM transmitters for testing insertion loss per wavelength, and end-to-end continuity of a link in CWDM networks with mux/demux and OADMs.