Configure the EM34 GPS with the Set GPS Port Menu on the Archer.
1. Using the stylus, select the EM34 Set GPS Port Menu.
2. Select the EM34 GPS Input Field.
Choose either Enabled or Disabled depending on whether using GPS for the survey or not. When the GPS is disabled, a message stating GPS Disabled will be seen where the GPS coordinates would usually be in the logging mode.
3. Select a Com Port in the Serial Port Field if enabling the GPS.
COM2: is the default GPS Com port. It is important that the GPS port is different than the port connected to the EM34.
4. Specify the correct Baud Rate for the GPS system.
By default the Baud Rate is set to 9600. Baud Rates include 4800, 9600, 19200, 38400, 57600, and 115200. Check the GPS’s user manual if 9600 isn’t correct.
5. Match the Parity to the GPS’s parity.
Options include No, Odd, or Even. The default is No.
6. Select the Data Bits Value that matches the GPS receiver.
The default is 8 although it can be adjusted to 7.
7. Select the Stop Bits Value that matches the GPS receiver.
The default is 1 although it can be adjusted to 2.
8.Tap the Monitor GPS Output button to put the GPS into terminal mode.
Terminal mode will display the GPS receiver output, the last NMEA command sent to the GPS receiver, and three command buttons: Pause/Go, Send, and Exit.
Every time the GPS records its location, information is sent and displayed in the terminal mode. If the user receives a message of “No Data,” the GPS settings or connection are not correct. The GPS monitoring can be stopped and restarted at any time using the Go/Pause Button. The Send Button allows the user to send a NMEA command to the GPS receiver. GPS parameters should be set using the GPS’s interface or manufacture’s software. However, if the user is familiar with the GPS’s system and NMEA protocol, he or she may use this button to give commands. It is important to note that not all GPS systems use NMEA protocol and some do not accept commands sent through serial cables. The Exit Button is used to leave the terminal mode.
9. After changing the EM34 Set GPS Port options, it is important to save.
Press the OK Button to save. After pressing the OK Button, it is safe to push the X Button to exit. If the user exits without pushing the OK Button, the changes will not be saved.