Gintec G10 - Chapter 4 Tilt Survey; 4.1 Activate tilt survey function

G10
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Figure 2-15 Rover Mode (Network datalink)
If you select External, then it can connect to external radio. There is a very
important thing, the external serial port band rate, this should be same with
external radio.
Figure 2-16 Rover Mode (External datalink)