ORIGINAL: Big feet
This is getting interesting.
I have a few observations,
1 PCM and the MPX IPD systems seem closely matched from the tests carried out by John above. ( No experience of IPD myself)
2 The Diversity system looks like you get Rx failure backup more that interference defense.
3 Where the Diversity system would provide a huge step forward in signal integrity would indeed be if they both were on different frequency's as Mike said above. My question is, How do we transmit on two different frequencies at the same time from the same Tx?
The Diversity systems offers this option too.
They sell a dual-frequency-TX-module. Then you transmit on two frequencies, receive with two frequencies and each receiver is able to reconstruct the whole RX-signal if some frames are lost. I think it´s the most perfect system availible nowadays! If you fly a JR/Graupner MC-24 you can buy their dual-TX-module and replace it without further modification to your transmitter and use dual frequency/dual receiver technology. Really promising!
Thomas