Tektronix dc bench power supply pws2000 series tektronix pws2721 the tektronix pws2721 is a dc bench power supply with a 10ma and 10mv resolution it has a low noise linear regulation and 005 voltage accuracy providing the clean accurate power you need at a price you can affordthe numeric keypad makes it easy to specify a precise current limit before you start your test you can also specify a maximum output voltage which will prevent accidental voltage settings above the specified max