Condition: Used — this unit is in excellent condition with minimal usage.

The Viavi JDSU COSA-4055 is a single-slot CWDM optical spectrum analyser module covering 1260–1625 nm. This listing is for the module only; however, compatible mainframes are also stocked — please contact us if you require one.

Included in the sale:
• COSA-4055 OSA Module (1260–1625 nm, 2302/01)
• SC Adapter

The images provided are of the actual item you will receive. Please review them carefully for the cosmetic condition and what is included in the sale.

The Viavi (formerly JDSU) COSA-4055 is the smallest CWDM optical spectrum analyser (OSA) on the market. The COSA-4055 module for the T-BERD/MTS-2000, T-BERD/MTS-4000 V2, T-BERD/MTS-5800, and OneAdvisor 800 platforms delivers the full functionality and speed of a benchtop OSA in a handheld, field-interchangeable form factor at a fraction of the cost of a traditional OSA. It is an ideal test tool for service providers installing, maintaining, and upgrading metro/access links and CWDM systems.

The COSA-4055 measures wavelengths and power levels of CWDM channels and displays the complete optical spectrum. Its single-slot, field-interchangeable design makes it simple to deploy and combine with CWDM OTDR modules for comprehensive fibre and CWDM network testing.

Key Specifications:
Wavelength Range: 1260 to 1630 nm
Scan Speed: 4 seconds (full sweep)
Form Factor: Single-slot module
Connector: SC (via adapter)
Compatible Platforms: T-BERD/MTS-2000, T-BERD/MTS-4000 V2, T-BERD/MTS-5800, OneAdvisor 800
Channel Spacing: CWDM (20 nm grid)

Highlights:
Field interchangeable single-slot design
Full wavelength coverage 1260–1630 nm
Drift measurements for both wavelength and power
Intuitive interface suitable for novice and expert users
Combines with CWDM OTDR modules for extended test capability

Applications:
Performance verification in metro access networks
Maintenance and troubleshooting of CWDM networks
Upgrade validation of CWDM infrastructure
Spectral and drift testing of CWDM optical sources

Key Features:
Handheld, fully functional CWDM OSA
Fast 4-second scanning speed
Zoom and marker functions
Pass/Fail analysis for rapid go/no-go results

Viavi COSA-4055 CWDM Optical Spectrum Analyser product datasheet: Download PDF

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is 'not as specified', you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, the email should accompany the order number, date and reason for return and must be within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than 'not as specified'.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is 'not as specified', in this case we will arrange for the return by way of a prepaid shipping label.