The Hewlett Packard HP438A is a 2 Channel Power meter used for measuring RF power. Used in conjunction with the supplied power sensors, the HP438A allows for precision measurements.

Where would this be used? The Hewlett Packard HP438A can be used in both Radiated and Conducted Immunity testing for measuring and levelling to the forward power. The HP438A can also be used to measure cable losses, RF currents on harnesses via current probes, and more.