I had the same problem on mine and it is nothing to worry about. The answer I got back from Gaspar (who is on this forum) said the system search's for a signal and ampifies a small signal so what it is doing is picking a signal from a near by servo or servo wire, but as soon as it picks a stronger signal up from the magnet in the rpm sensor it reduces its sensitivity and at that point it does not pick up the servo signal at all.

so don't worry just fly!


jason

infact heres the email he sent me as he explains it better.

Hello Jason,

Usually the noise is picked by the magnetic sensor, not the cables. All of
the servo cables that are near of the sensor radiate magnetic fields, and
the only solution is to move them far from the hall pick-up.

As a test, you can disconnect the servos from the receiver, and this should
stop the noise. Then, connect one by one to see what cables are inducing the
noise.

When the engine is running the sensor is fine because the system have a
automatic gain control for the amplifier. As soon as the pulses from the
magnet are sensed, the gain is reduced and the noise don't affect.