Check that the RF300 does not exceed its maximum mechanical limit (usually ±plus or minus 90 degrees, though the operational range is ±plus or minus 45 degrees). 4. Electrical Wiring and Connections
Locate a flat, rigid structural member or bulkhead near the rudder quadrant or tiller arm. Place the RF300 unit on the mounting surface.
Fix: Check for mechanical loose play in the ball joints or linkage rod. Ensure the cable is not run alongside high-amperage power lines causing interference.
Despite careful installation, issues may arise with the RF300 system. Consult the troubleshooting guide in the Simrad RF300 installation manual for common problems and solutions.
The RF300 features a variable frequency output (3400Hz at center, 20Hz per degree) that interfaces directly with the autopilot computer. simrad rf300 installation manual
Follow the on-screen prompts to calibrate the rudder endpoints (port and starboard limits).
Ensure the linkage rod is perfectly parallel to the rudder tiller arm when midships.
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transmitter lever to its center position using the (the lever should be opposite the cable entry). Check that the RF300 does not exceed its
Navigate to Settings > Autopilot > Installation > Dockside Calibration .
: Turn the helm wheel to center the rudder. Then, manually rotate the transmitter lever on the RF300 until it is perfectly centered, using the alignment mark on the unit as your guide.
If you need to extend the 10-meter (33-foot) attached cable, use a high-quality, twisted-pair shielded marine cable.
Ensure your physical rudder is pointing dead straight ahead, then press OK on the display to confirm the zero point. Place the RF300 unit on the mounting surface
Scroll to the menu and press the STBY key again while turning the rotary dial to unlock technician access.
The RF300 uses a two-wire, non-polarized frequency signal. This means wire color polarity at the autopilot computer terminal strip is generally interchangeable, but standard practices should be followed for troubleshooting purposes. Autopilot Computer Terminal Map RF300 Wire Color Autopilot Computer Board Terminal Signal Description Rudder FB (Frequency / +) Positive feedback signal White Rudder FB (Return / -) Negative signal return Shield (Bare) Ground / Screen / Shield Drain wire for interference Electrical Installation Rules
If your autopilot display flashes a "Rudder Feedback Failure" or "No Rudder Data" alarm, perform these checks using a digital multimeter: