What are “image frequencies”, and why would I care about transmissions on a frequency that doesn match my transmitter frequency?
Basically our receivers “listen” mainly on the printed receive frequency, but due to their internal design they can be susceptible to interference on the “image frequencies” if it’s strong enough. Internally, RC receivers typically convert the high frequency signal in multiple steps, or stages, and these stages operate at a different frequency than the main transmit frequency. This means that parts of the receiver electronics (internally) are actually “listening” at these other frequencies – and if some outside signal is strong on these other frequencies it can get fooled. These other frequencies are called image frequencies – and there is one upper and one lower image frequency for each receiver. The location of the image frequencies depends on whether the receiver is single or dual-conversion. The “main frequency” (the one stamped on the transmit module or crystal of your transmitter) is used to check if someone else is on your frequency. The image frequencies are important frequenci
