This is a sole-source opportunity for a five-year calibration service agreement to maintain 23 pieces of Keysight electronic test equipment. Services must be performed by Keysight or an authorized provider using OEM proprietary procedures, with NIST-traceable calibrations and required documentation. The contract includes a separate line item for unscheduled maintenance with a strict annual not-to-exceed limit of $50,000. Performance will take place at Edwards Air Force Base, California. The government intends to negotiate solely with Keysight Technologies due to proprietary software requirements.