Trimble Outdoors 5700/5800 - Manual (Page 107)

5700/5800 GPS Receiver User Guide 95
Event Marker Input and 1PPS Output 1 1
5700 GPS Receiver Oper
ation
GPS Configurator sends the new configuration information to
the 5700 receiver, and the receiver starts to accept event marker
input.
7. Click OK to exit GPS Configurator.
The software disconnects from the 5700 receiver.
11.1
1PPS 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.
111.1
1PPS pulse definition
The leading edge of the pulse coincides with the beginning of each UTC
second, as shown in Figure 11.1. 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 11.1 Time tag relation to 1PPS wave form
0 V
4 V
Seconds
Time tag output here Time tag applies here