11 Event Marker Input and 1PPS Output
74 Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide
Trimble R7 GPS Receiver Operation
• 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 the fields “a” and “b” appear as “??”, 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 50, or refer to the GPS Configurator Help.
1. Connect the computer to the Trimble R7 GPS receiver.
2. Turn on the receiver.
3. To start the GPS Configurator software, click and then select
Programs / Trimble / GPS Configurator / GPS Configurator. The GPS Configurator
dialog appears and the software automatically connects to the receiver.
4. Select the Serial outputs tab.
5. Select the 1PPS (Port 2 only) check box.
6. If you want ASCII time tags enabled, select the check box and choose an output
port.
7. Click
Apply.
The GPS Configurator software sends the new configuration information to the
receiver, and the receiver starts to generate 1PPS output on Port 2.
8. Click
OK to exit the GPS Configurator software.
The software disconnects from the receiver.
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