The ES-185F/PTP is a GPS master clock/time code generator and IEEE-1588 PTP/NTP time server. The unit receives accurate time and date information from global positioning system satellites and displays nine digits of time(day of year, hour, minute and second). Simultaneously, the ES-185F/PTP generates several types of time code including SMPTE/EBU LTC, ESE-TC90/TC89, ASCII (RS-232C and USB), IRIG-B and a 1PPS signal. These outputs allow the ES-185F/PTP to easily interface with new or existing computers, automation and clock systems. 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-185F/PTP offers an accuracy of better than 10nS, and is entirely self-setting. The unit provides an internal coin cell for backing up the GPS receiver time. Software supplied with the ES-185F/PTP permits users to continuously update a computer's windows' clock to the time available on the USB port. Other features allow the user to select SMPTE mode (DF, NDF, EBU and real Time), offset the time zone displayed and output by the ES-185F/PTP and advance or delay the time output for various synchronizing purposes.