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The Ultra eSAM Modem features a GPS Module capable of using the GPS Satellite system to locate the modem anywhere on the earth. This is implemented using the TCP or UDP Protocol, and is designed to work with many different applications.
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Enable the GPS Application, if it is not enabled already. 4. The eSAM is designed to interface with a TCP or UDP Server. GPS data is sent straight from the embedded GPS Modem, encapsulated in a TCP or UDP header using whichever port you set here.
Note: When the signal strength for GPS is very low, it may take several minutes for a GPS lock to be achieved. If the received packets do not contain any co-ordinates, please wait and allow the eSAM time to gain a signal lock.
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If you don’t have a server set up for GPS yet, or you want to test the eSAM Locally without setting up a server, you can use a dumb TCP terminal such as the PComm Terminal Emulator to directly monitor the GPS TCP Packets sent from the eSAM.
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5. Connect your eSAM to your computer, and open the Applications>GPS screen 6. Enter the local IP of the computer you have connected to the eSAM, and set the server port to match the port configured in the terminal (in this case, my local PC was assigned the IP 192.168.1.117)
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The eSAM will send the GPS status to the IP listed in the Server IP, where our terminal will display it. In this test, I have not connected an antenna to the eSAM so the data is missing its co-ordinate field. This indicates that the GPS does not have reception.
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If your eSAM is unable to get a good signal, please check the following: 1. Check that you are using the correct antenna screwed into the GPS connector of the eSAM, the one supplied with the eSAM has a long cord and a square-shaped antenna.
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