User Manual

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10 Event Marker Input and 1PPS Output
114 5700/5800 GPS Receiver User Guide
55700 Reference
10.31PPS Output
The 5700 receiver can output a one pulse per second (1PPS) time
strobe with an associated ASCII time tag output. The pulse is output
through Port 2 of the 5700 receiver using the event marker/1PPS
cable.
10.3.1 1PPS Pulse Definition
The leading edge of the pulse coincides with the beginning of each
UTC second, as shown in Figure 10.1. The pulse is driven by an
RS-422 driver between nominal levels of 0 V and 4 V. The leading
edge is positive, rising from 0 V to 4 V.
Figure 10.1 Time tag relation to 1PPS wave form
0V
4V
Seconds
Time tag output here Time tag applies here