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Acutime 2000 Synchronization Kit User Guide 5-1
5 System Operation
This chapter describes the operating characteristics of the Acutime
2000 GPS smart antenna, including start-up, satellite acquisition,
operating modes, serial data communication, and the timing pulse.
The Acutime 2000 acquires satellites and computes position and time
solutions. It outputs data in the TSIP (or NMEA) protocol through its
serial ports.
For more technical information on system operation, see Appendix F,
Theory of Operation .
5.1 Start-Up
At power-up, the Acutime 2000 automatically begins to acquire and
track GPS satellite signals. It typically obtains its first fix in under
two minutes.
During the satellite acquisition process, the Acutime 2000 outputs
periodic TSIP status messages on Port B. These status messages
confirm that the receiver is working.
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Note – The Acutime 2000 has no provision for external backup power
and always begins operation from a cold start unless a warm start is
forced by uploading almanac data and time.