The HPx-310 radar signal output card generates representative radar signals for system testing, simulation, training, or radar video streaming. Under software control, the card generates radar video, trigger and azimuth signals similar to those generated by real radars, and permits a radar display or processing system to be tested and qualified using laboratory-based equipment before installation with the radar. Time-stamped radar video data is passed to the card over the PCIe bus and the card generates the appropriate video, trigger and azimuth data signals in real-time. The HPx-310 supports a broad range of rotation periods and variable and staggered PRF modes. In addition to emulating conventionally rotating scan radars, the card may also be configured for counterrotating, sector scanning or random scan modes.