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13 Event Marker Input and 1PPS Output
146 5700 GPS Receiver User Guide
Reference
13.31PPS 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
(Part Number 36451-00).
13.3.1 1PPS Pulse Definition
The leading edge of the pulse coincides with the beginning of each
UTC second, as shown in Figure 13.1. 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 13.1 Time tag relation to 1PPS wave form
0V
4V
Seconds
Time tag output here Time tag applies here