Tektronix tcp0150 ac dc current probe tektronix tcp0150 p the tektronix tcp0150 is a high performance and easy to use 150a ac dc current probe designed for use and direct connection to the tekvpi 8482 probe interface p p this ac dc current measurement probe provides 20mhz of frequency bandwidth with selectable range control for 25a and 150a measurement ranges it also provides low current measurement capability and accuracy to current levels as low as 5ma per division important for ac