User's Manual

Trimble R7/R8 GPS Receiver User Guide 99
Event Marker Input and 1PPS Output 11
Trimble R7 GPS Receiver Operation
• hh:mm:ss is the hour (on a 24-hour clock), minute, and second.
The time is in UTC, not GPS time.
• a is the position-fix type:
1 = 2D Position Fix for E,N only
2 = 3D Position Fix
3 = Single SV Clock-only fix
4 = Automatic Mode
5 = Reference Station Position
6 = Two-Dimensional with Fixed Clock
7 = Overdetermined solution for Clock-only
• b is the number of satellites being tracked: 1 to 9, “:” ( for 10), “;”
(for 11), or “<” (for 12).
• Each time tag is terminated by a carriage return, line feed
sequence.
A typical printout looks like this:
UTC 93.12.21 20:21:16 56
UTC 93.12.21 20:21:17 56
UTC 93.12.21 20:21:18 56
If a and b are ??, the time is based on the receiver clock because the
receiver is not tracking satellites. The receiver clock is less accurate
than time readings extracted from satellite signals.
111.3 Enabling and configuring 1PPS output in real time
To enable or configure the 1PPS output function, you need the GPS
Configurator software.
You can use the GPS Configurator software to configure a Trimble GPS
receiver connected to your office computer. For more information, see
The GPS Configurator Software, page 68, or refer to the GPS
Configurator Help.
1. Connect the computer to the Trimble R7 receiver.
2. Turn on the receiver.