Check the listing for details. Viavi COSA-4055 CWDM Optical Spectrum Analyzer Module - Viavi 2301/02. Condition: New – Open box. Listed at 899.99 USD. Introducing the Viavi COSA-4055 CWDM Optical Spectrum Analyzer Module, a top-of-the-line product from VIAVI. This powerful spectrum analyzer is a must-have for businesses and industries that rely on precise and accurate signal analysis. With the ability to analyze and acquire data quickly and efficiently, the COSA-4055 is ideal for those who need to stay ahead of the competition. This module is compatible with the Viavi 2301/02 platform and boasts several key features that make it an essential tool for any business. The brand, VIAVI, is synonymous with quality, so you can rest assured that this product will exceed your expectations. The model, COSA-4055, is a reliable and powerful device that is perfect for analyzing signals and gathering data. This item is perfect for those in the Business & Industrial, Test, Measurement & Inspection, Analyzers & Data Acquisition, and Signal & Spectrum Analyzers categories. No original box