Radio remote control for model aircraft - repeats instruction at same or different frequencies to reduce interference

摘要

The radio remote control for model aircraft is made relatively insensitive to noise by repeating the instruction at the same frequency (or same channel) a moment after it was first sent. The instruction may be repeated as many times as is felt necessary. Alternatively, the instruction may be sent simultaneously at two different frequencies, or at one frequency followed a moment later by transmission at the other frequency. The instruction signals may also be subjected to various frequency or voltage variations aimed at reducing the effects of interference to the control process.