Receiver Hardware problems. Advice needed

My current receiver is not compatible with Pixhawk, does not output ppm. Two ways to resolve this. Get a new transmitter and receiver that is PPM capable or modify the receiver I have now. I lean towards getting the new transmitter/receiver because the one I got is pretty dinky and I want to get the right equipment so I can really have fun with my rover.

If I were to modify my current receiver with the encoder posted below, would it configure with my transmitter that I have right now? Also it looks like the encoder is used to connect many different receivers (i.e. one input and six output wires). Would it work just one input one output?

If I were to get the new transmitter and receiver below: Would these parts be compatible with Pixhawk. It appears that it will but want to make sure.