A Appendix A
Connect to GPS / Disconnect from GPS: This button either tries to establish a connection with the
GPS receiver chip or disconnects the connection.
COM: used to select the COM port for communication between SatViewer and your GPS receiver.
Your GPS receiver port is set to COM3 and a baud rate of 9600. The default SatViewer settings
shouldn’t need to be changed to connect.
Note – Before changing COM port or baud rate settings, you must first disconnect from your GPS receiver
before making the changes. After you have changed the COM settings, then you can re-attempt to connect to
your GPS receiver, using the Connect to GPS button. When exiting SatViewer (or any other GPS application)
it is good practice to tap Disconnect from GPS before closing the application to ensure the COM port is closed.
Enabling the Microsoft GPS driver
If you would like to connect two or more programs to your GPS receiver at the same time (such as
SatViewer and a navigation program), ensure the Microsoft GPS driver is turned on:
1. Tap Settings / System / GPS.
2. Tap the Access tab.
3. Ensure there is a checkbox next to Manage GPS automatically. This turns on the Microsoft GPS
driver. Ensure that the GPS program port is COM3 (or any other port available in the Microsoft
GPS driver screen) and the GPS hardware port is COM2 with baud rate of 9600.
4. The Microsoft GPS driver will now allow multiple applications to connect to your unit’s GPS
receiver at the same time. Your unit’s GPS receiver can be controlled with SatViewer while other
applications are also using your unit’s GPS receiver.
5. In SatViewer and any other program using your unit’s GPS receiver, change the COM port to
COM3 (or the COM port specified in Step 3 above). Both applications will connect to your unit’s
GPS receiver through the Microsoft GPS driver.
Restore defaults
When connected to your unit’s GPS receiver:
Tapping the Restore Defaults will result in the following settings being changed:
Field Setting Field Setting
GPS receiver output NMEA mode Elevation mask 5
GPS status voice prompt OFF PDOP mask 8
Static Navigation OFF HPDOP mask 8
Smooth Tracking OFF
Ranger Series Handheld Computer 63
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