RE: what is a synthesized dual- conv reciever
That is what CGRetired was talking about.
Yes indeed someone else using the same channel can cause your plane to crash, which is why most clubs use frequency boards to prevent this.
Bascially your receiver will "listen" to ANY transmitter on the same frequency.
It may not respond if the shift pattern is different, but the same channel is used by someone else, but YOU'll loose control.
A Synth receiver can be used on any channel.
If you have a fixed channel TX, then the synth RX should work with it, if the shift pattern is compatible.
If you also have a synth TX, and you get out to the field only to find that someone else is using your channel, you can select another channel on the TX and RX and fly on that channel instead.
I do this all the time.