| No GNSS position detected |
Receiver harness disconnected |
Verify GNSS receiver harness connections |
| No GNSS position detected |
Receiver not powered |
Verify GNSS receiver/display powers on correctly |
| No GNSS data after startup |
Receiver still initialising |
Allow receiver sufficient time to initialise and acquire satellite lock |
| Receiver powers on but no data detected |
Incorrect serial/CAN output connection |
Verify the correct receiver output port is connected |
| Receiver powers on but no data detected |
Incorrect RS232 baud rate configuration |
For NMEA 0183 receivers, verify the configured serial baud rate matches the Level COMMAND receiver configuration |
| Receiver powers on but no data detected |
Incorrect CANBUS connection or baud rate |
For CANBUS/NMEA 2000 receivers, verify the receiver is connected to the correct CANBUS network operating at 250 kbps |
| Receiver powers on but no data detected |
Incorrect serial/CAN output port selected |
Verify the correct receiver output port is enabled and connected |
| Receiver powers on but no data detected |
NMEA output messages not enabled |
Verify required NMEA output messages are enabled within the receiver/display configuration |
| Position updates slowly |
Low output rate configured |
Configure receiver output rate to minimum 5 Hz; 10 Hz recommended |
| No RTK corrections |
Incorrect base station selected |
Verify the implement receiver is connected to the intended base station or correction source |
| No RTK corrections |
Base station not transmitting corrections |
Verify base station operation and correction output |
| No RTK corrections |
Incorrect base station configuration |
Verify base station radio/modem and correction output configuration |
| No RTK corrections |
Incorrect implement receiver configuration |
Verify correction source, radio/modem and RTK settings within the implement receiver |
| RTK intermittently lost |
Poor correction radio signal |
Inspect correction antenna placement and cable condition |
| RTK intermittently lost |
Excessive distance from base station |
Reduce distance to base station or verify correction coverage |
| Poor accuracy or drifting |
Low GNSS correction quality |
Verify RTK/DGNSS correction status |
| Poor accuracy or drifting |
Multipath or obstructed sky view |
Move machine to open sky area clear of obstructions |
| GNSS accuracy degraded unexpectedly |
Receiver operating in Float/DGNSS mode |
Verify RTK Fix status before operation |
| Position intermittently lost |
Damaged harness or loose connector |
Inspect GNSS harnessing and connectors |
| Position quality degraded |
Receiver firmware outdated |
Verify GNSS receiver firmware is up to date |
| Position appears offset |
Incorrect base station coordinates |
Verify configured base station coordinates |
| Position appears offset |
Connected to incorrect base station |
Verify the implement receiver is connected to the correct base station |
| Position appears offset |
Incorrect receiver offsets configured |
Verify receiver height, fore/aft and lateral offsets within Level COMMAND |
| Cross-slope or terrain response incorrect |
Incorrect IMU or receiver assignment |
Verify GNSS and IMU configuration within Level COMMAND |
| Terrain compensation inaccurate |
TCM/IMU calibration not completed |
Perform TCM/IMU calibration according to manufacturer instructions |
| Terrain compensation inaccurate |
Incorrect machine orientation during calibration |
Perform calibration on level ground away from vibration |
| Terrain compensation unstable |
IMU mounted on flexible surface |
Mount IMU to a rigid surface isolated from excessive vibration |
