Check the listing for details. Hewlett Packard 200CD Wide Range Oscillator. Condition: Used, Made in United States. Listed at 128.95 USD. The Hewlett Packard 200CD Wide Range Oscillator is a high-quality audio signal generator manufactured by HP in the United States. This oscillator is designed to produce a wide range of audio frequencies with accuracy and stability, making it a reliable tool for testing, measurement, and inspection purposes in various industrial and business settings. Its brand reputation and country of origin ensure that it meets the standards of excellence and quality that professionals require for their projects and research.