Extending the company’s range of power sensors are two models, the NRP-Z56 and NRP-Z57, which are allegedly the first on the market to measure thermal power from dc up to 50 GHz and 67 GHz, respectively. They are also said to be the only thermal power sensors that can be used even without a base unit. Connection to a PC is via USB. Features include a standing wave ratio of 1.35 from 50 GHz to 67 GHz and a dynamic range of 55 dB. For more details, call ROHDE & SCHWARZ INC., Columbia, MD. (888) 837-8772.