The ES-410 generates a stable source of 10 MHz and 1 PPS using GPS (Global Positioning System) satellites as a reference. The unit provides 10 MHz in both Sine Wave and Square Wave (5 volt logic) form, four Sine Wave and four Square Wave outputs are provided. The 1 PPS output is a 50% duty, 5 volt logic signal, positive-edge coinciding with the UTC seconds change. An ESE TC90 Time Code output is also provided for driving remote time displays. A USB interface allows configuration of the Time Zone and other parameters, and outputs the time.