Condition: Used — Good working condition.

This listing comprises a Viavi MTS 4000 platform fitted with the COSA-4055 CWDM Optical Spectrum Analyzer module, covering the full wavelength range of 1260 to 1625 nm. The unit also features a built-in power meter and Visual Fault Locator (VFL), making it a comprehensive all-in-one field test solution for CWDM network installation, maintenance, and troubleshooting.

Included in the sale:
• Viavi MTS 4000 mainframe with built-in power meter and VFL
• COSA-4055 OSA module
• Stylus
• Carry bag
• Power 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 COSA-4055 is the smallest CWDM optical spectrum analyzer (OSA) on the market. Designed as a single-slot module for the T-BERD/MTS-2000, -4000 V2, -5800, and OneAdvisor-800 platforms, it delivers the functionality and speed of a traditional OSA in a handheld form factor at a fraction of the cost. The COSA-4055 is an ideal test tool for service providers looking to install, maintain, and upgrade metro/access links and CWDM systems. It measures wavelengths and power levels of CWDM channels and displays the complete optical spectrum.

Key Features:
Wavelength Range: 1260 to 1630 nm
Scan Speed: 4 seconds (full range)
Form Factor: Field-interchangeable, single-slot module
Drift Measurements: Wavelength and power drift tracking
Analysis: Pass/Fail analysis, zoom, and marker functions
Compatibility: Can be combined with CWDM OTDR modules
Platforms Supported: T-BERD/MTS-2000, MTS-4000 V2, MTS-5800, OneAdvisor-800

Applications:
Performance verification in Metro Access Networks
Maintenance and troubleshooting of CWDM networks
Upgrade planning for CWDM infrastructure
Spectral and drift testing of CWDM sources

The COSA-4055 is designed to be simple for a novice yet fully featured for an expert, making it a versatile tool for field technicians at all experience levels.

Viavi COSA-4055 CWDM Optical Spectrum Analyzer Module datasheet (PDF): 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.