The Naval Surface Warfare Center (NSWC) Crane requires firm fixed-price commercial repair and evaluation services for the N5183B MXG Microwave Analog Signal Generator (MK-99) and E8362B Network Analyzer (OE-120), with an option for repair following evaluation. This is a sole-source procurement limited to Keysight Technologies due to their exclusive proprietary rights to the specialized technical data, diagnostic software, and schematics needed for accurate calibration and repair. Awarding to any other vendor would cost the government over $100,000 and delay return of the instruments by several months, compromising operational readiness. Performance of services is at Keysight Technologies’ location in Colorado Springs, Colorado. All responsible sources may submit a capability statement for consideration, but the government retains discretion to proceed without competition.