The Agilent/HP Model 3550B comprises an Oscillator (Model H20-204C, Option 002), a Patch Panel (Model 353A) and an AC Voltmeter (Model 403B, Option 001). The oscillator and the Ac voltmeter are operated from a rechargeable battery power supply and they are completely transistorized. The patch panel is a passive device and required no operating voltage. All three instruments are housed in an aluminum carrying case which is equipped with an adjustable shoulder strap. The carrying case cover contains space for the accessory cables, the instrument power cord, and operating manual.
