Yes it does work if you have a recent APM 1.4, or if you updtated the PPM encoder firmware with the ArduPPM version available in the downloads section.
It should works with most standard PPM Sum streams. I've tested it with a Jeti receiver, but other users did have sucessfull results with other receivers.
See the ArduPPM manual in the Ardupilot downloads section.
Replies
The instructions are here for APM 1.x boards.
http://code.google.com/p/ardupilot-mega/wiki/Encoder?wl=en
If you have the APM 2 board, there is a section for it in the wiki as well.
Yes it does work if you have a recent APM 1.4, or if you updtated the PPM encoder firmware with the ArduPPM version available in the downloads section.
It should works with most standard PPM Sum streams. I've tested it with a Jeti receiver, but other users did have sucessfull results with other receivers.
See the ArduPPM manual in the Ardupilot downloads section.
http://code.google.com/p/ardupilot-mega/downloads/list