The model PS4L probe station from SemiProbe is designed for a lifetime of testing. The versatile microwave probe station can be upgraded over and over to meet growing needs and applications including on-wafer and printed-circuit-board (PCB) testing. Ideal for universities and research facilities, the PS4L can be used for microwave testing at frequencies from DC through 220 GHz, depending upon the probe attachments. For more information, don't miss the Special Report on SemiProbe scheduled for the February 2007 issue of Microwaves & RF magazine, or visit the company's website at