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The RFD900x will use the stock dipole antennas (the long ones), which means that RF Noise generated by the RFD900 may be fairly close to the source. It is possible recommended to use co-axial extension cables to move the mounting location of the antennascoaxial cable extensions to mount the antennas at least 20cm away from each other. Recommendations to put one antenna along the edge of a wing, and to place the other antenna vertically along a vertical stabilizer or landing gear. Maintain one antenna perpendicular to horizon and one antenna parallel to horizon.
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