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Pub# OM22-iScan EC-OM
Procedure #6: Diagnosing GPS-related problems
If you do not see a GPS, DGPS, or RTK on SoilViewer screen, you do not have GPS coming in, and no
data will be recorded.
Figure 6.1(No GPS)
Figure 6.2 (With DGPS fix)
Insure your GPS receiver is powered and outputting NMEA strings GGA, and either VTG or RMC at a 1hz
rate; 4800 baud, 8 data bits, no parity, 1 stop bit. Verify that your GPS cable is sending GPS data through
pin 2, pin 5 is ground, and no other pins have signal or power on them. The most common issue is hz rate.
If the GPS has been used for lightbar guidance it may have been set to a 5 or 10 hz rate. It will need to be
changed to 1 hz in order for the controller to accept it.
Shown below is a Troubleshooting tree for diagnosing GPS signal problems. It is not meant to replace your
GPS receiver user manual—it merely shows how to determine if your receiver is sending the GPS signal
that the EC Surveyor needs.
Figure 6.3
6-10
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