UUV 3500 Integration Checklist for Eliminating Noise Caused by EMI

1. Disable both HF and LF transmitters in SonarPro before conducting baseline noise tests.
2. Perform dry passive tests and include a 'rub test' to confirm responsiveness and separate mechanical from electrical noise sources.
3. Measure noise floor in A-Scan/SonarScan: target ~-102 dB for side-scan only, -112 dB for bathymetry channels (factory baselines).
4. Tie all sonar electronics (TX, RX, filter boards) to the same ground as the vehicle power source. Do not float sonar electronics.
5. Avoid isolated or floating grounds.
6. Verify RX board grounding holes (holes with gold rings) are connected to vehicle ground.
7. Secure TX board to chassis ground via grounding holes with gold rings. If not mechanically attached to brass plate chassis, connect electrically via clips or wiring.
8. Check that TX and RX ribbon cables are properly seated and connected. Re-seat if necessary.
9. Repeat noise tests with transmitters disabled. Compare waterfall/A-scan patterns to confirm noise reduction.
10. If persistent noise remains, correlate onset times with vehicle events (e.g., load resistor switching, vessel open vs. closed) to isolate cause.
11. Verify tests again in vehicle.