FAQ

1. Does C-RTK3 G5 support working as an RTK base station?

• The C-RTK3 G5 can only be used as a rover station. It supports single-antenna and dual-antenna heading modes, and does not support functioning as an RTK base station.

2. What base stations are compatible with C-RTK3 G5?

• It is compatible with mainstream RTK base stations such as C-RTK 9Ps, C-RTK 2HP, and network RTK base stations (NTRIP, Continuously Operating Reference Station).

3. Does it default to standard CAN 2.0 or CAN FD?

• To ensure peripheral compatibility, the factory default is standard CAN 2.0. It can be switched to CAN FD mode via parameters. After switching, all devices on the bus must support CAN FD; otherwise, normal communication and device recognition will fail.

4. What application fields is C-RTK3 G5 suitable for?

• It applies to all devices and scenarios requiring high-precision GNSS positioning, such as robots, unmanned ground vehicles, and underwater vehicles.

5. If the gpsyaw value stays at 0 or 655.35, the flight controller is not obtaining heading data. Possible causes:

• Incorrect master/slave antenna offset settings; the setting error must not exceed 20%.
• Satellite positioning looks good, but the slave antenna may be poorly positioned or not fixed; check whether the slave antenna and its feeder cable are properly connected.
• Poor positioning quality; place the module outdoors with a clear sky view. Do not test near a window.
• The module is working in single-antenna mode; check the related parameters.

6. In GPS mode the vehicle spins 360° and cannot hold its position:

• First rule out compass issues, then check the following.
• GPS position offset parameters are set incorrectly or not set (GPS_POS1_X/Y/Z).
• Poor GNSS positioning quality.
• Disable SBAS augmentation. In areas where SBAS is not covered or poorly covered, enabling SBAS may cause position drift.

7. How do I tell the master antenna from the slave antenna, and what does each do?

• The master antenna port is labelled MAIN, and the slave antenna port is labelled AUX. The master antenna provides the position output, and a baseline vector is formed between the slave antenna and the master antenna. The heading is obtained by solving the direction of this baseline. Therefore, the module's position is based on the master antenna; if the position is good but there is no heading data, the slave antenna signal may be poor — check the feeder cable and hardware connection.