JDS Uniphase COSA-4055

The COSA-4055 is a handheld CWDM Optical Spectrum Analyzer module designed for installation, maintenance, and network upgrades. It delivers complete spectral analysis in under 4 seconds, integrating full OSA functionality into a portable form factor compatible with T-BERD/MTS-2000 and T-BERD/MTS-4000 platforms. The module operates across the 1260 to 1625 nm wavelength range with -55 to +10 dBm measurement capability, making it a cost-effective solution for metro and access network testing.

## Technical Specifications

• Wavelength range: 1260 to 1625 nm
• Dynamic range: -55 to +10 dBm
• Noise floor: -55 dBm
• Level accuracy: ±0.5 dB
• Level linearity: ±0.1 dB
• Resolution bandwidth: 4 nm
• Optical return loss: >35 dB
• Scan time: <4 seconds
• Display: 7-inch TFT color
• Operating temperature: -5 to +50°C
• Storage temperature: -20 to +60°C
• Module dimensions: 128 x 134 x 40 mm
• Module weight: 0.35 kg

## Key Features

• ITU-T G.695 and G.674.2 compliant
• Tunable channel grid supporting ITU-T G.694.2 CWDM wavelengths and custom grids
• Complete spectral trace with tabular power and wavelength results
• Zoom and marker functions for detailed analysis
• Wavelength and power drift measurement
• Automatic channel detection and pass/fail analysis against user-settable limits
• Optional SFP bay (version 2301/02) hosts up to 2 SFP CWDM transceivers for insertion loss testing and end-to-end link continuity verification
• Multiple optical connectors: FC/PC, SC, ST, DIN, LC

## Typical Applications

• Metro and access network performance verification
• CWDM network maintenance and troubleshooting
• Spectral and drift testing of CWDM sources
• Vendor compatibility assessment
• Insertion loss testing with simulated CWDM transmitters
• End-to-end continuity checks in mux/demux and OADM networks

## Compatibility & Integration

The module integrates directly into T-BERD/MTS-2000 and T-BERD/MTS-4000 platforms, eliminating the need for standalone test equipment in field operations.