* if using a single-line receiver that turns of the single-line signal in case of signal loss between receiver and transmitter (e.g. Spektrum® satellite receiver or Graupner® receiver in „SUMDOF“ mode) | * if using a single-line receiver that turns of the single-line signal in case of signal loss between receiver and transmitter (e.g. Spektrum® satellite receiver or Graupner® receiver in „SUMDOF“ mode) |