The Viavi (formerly JDSU) T-BERD 2000 is a compact, handheld multi-application fibre optic test platform designed for field technicians working on access, metro, and enterprise network installations and maintenance. Its modular architecture allows different test modules to be inserted into the mainframe, providing a flexible and cost-effective solution for a wide range of fibre characterisation tasks from a single instrument.
The CWDM COSA-4055 is a Coarse Wavelength Division Multiplexing Optical Spectrum Analyser module purpose-built for the T-BERD 2000 platform. It enables field engineers to perform wavelength-resolved optical power measurements across the ITU CWDM grid, identify active channels, verify channel spacing, and troubleshoot CWDM multiplexers and demultiplexers in the field.
Key Specifications — Viavi CWDM COSA-4055 / T-BERD 2000:
Wavelength Range: CWDM grid coverage (typically 1270 nm to 1610 nm)
Channel Spacing: 20 nm CWDM ITU grid
Measurement: Per-channel optical power and wavelength identification
Platform: T-BERD 2000 modular handheld mainframe
Display: Colour LCD touchscreen (mainframe)
Power: Internal rechargeable battery or AC adapter
Form Factor: Handheld, field-portable
Applications: CWDM network commissioning, channel verification, maintenance, and fault finding
Please refer to the Viavi Solutions website for full and current specifications.
