Embedded GPS Time and Frequency ModuleSource: TrueTime Inc.
The evaluation module acquires precise time and frequency from atomic clocks aboard Global Positioning Systems (GPS) satellites with 40 nanosecond time accuracy and 1 X10-12 frequency accuracy referenced to the world's international time standard, Universal Coordinated Time (UTC). During satellite tracking there is no long-term frequency drift. The time module delivers time over an RS-232 serial bus and utilizes the bus to accept a time comparison programming value. This value, with a resolution of one millisecond, triggers an output pulse when the UTC time equals this time value. The programmable time comparison pulse and a one Pulse Per Second (PPS) output signal are the high accuracy time outputs. In addition, the module features a 10Mhz frequency reference which is cycle-locked to the one PPS output signal.
TrueTime Inc., 2835 Duke Court, Santa Rosa, CA 95407. Tel: 707-528-1230; Fax: 707-527-6640.