Keysight technologies usb power supplies keysight technologies u2941a the keysight technologies u2941a test adaptor for parametric measurements has been designed to supplement the u2722a usb power supply available as rapid part 49 8304 with the testing and measurement of semiconductor components including smd components and dip ics several interchangeable base modules enable adaptation to different pin configurations the test adaptor is equipped with a teflon insulation plate so can cap