The ES-185E/PTP is a GPS master clock/time code generator/PTP/NTP time server. The unit receives accurate time and date information from global positioning system satellites and supplies this data to the user in a variety of forms. A 12-channel receiver is employed that is capable of tracking up to twelve satellites simultaneously, although reception of only one is required for time data to be output. ESE's ES-185E/PTP offers an accuracy of better than 10nS and is entirely self-setting. The dual battery backup provides a coin cell for backing up the GPS receiver and user settings and a Gel-cell for a 4-hour operational backup. The ESE and ASCII outputs are operational when running on battery.