Trimble Outdoors 5700/5800 - Manual (Page 106)

11 Event Marker Input and 1PPS Output
9 4 5700/5800 GPS Receiver User Guide
5700 GPS Receiver Oper
ation
The event is triggered when the source pulse voltage transitions
between 1.0 V DC and 2.0 V DC in less than 100 nsec. Trimble
recommends that you use TTL level inputs. You can configure the
receiver to recognize either a positive (rising) or negative ( falling)
voltage as the leading edge of a pulse. The accuracy of the associated
time tag recorded for an event is determined by the GPS accuracy
(typically less than 1
µsec.).
The 5700 receiver records each event in the current data file. This
record includes the port on which the event was received.
112.1
Enabling and configuring event marker input
To enable or configure the event marker input function, you need either
GPS Configurator.
In real time
You can use GPS Configurator to configure a Trimble GPS receiver
connected to your office computer. For more information, see The GPS
Configurator Software, page 66, or refer to the GPS Configurator Help.
To enable event marker input:
1. Connect the computer to the 5700 receiver.
2. Press [P] to turn on the 5700 receiver.
3. To start GPS Configurator, click , then select
Programs / Trimble / GPS Configurator / GPS Configurator.
The GPS Configurator dialog appears and the software
automatically connects to the 5700 receiver.
4. In the General tab, select the Event marker check box.
5. Select the appropriate option, Positive slope or Negative slope,
depending on the type of pulse the external device uses.
6. Click Apply .