I was wondering if anyone could lead me straight on wiring an altitude encoder to a transponder via serial connection using Icarus altitude. I am trying to get my Odyssee from MGL wired to a Garmin 327 transponder and thought I wired it right, but it will not display FL or Altitude information on the transponder. I have only the tx on the Odyssee hooked to the RX on the transponder as well as it is grounded and shielded. The only thing I can think that might not be right is that the tx on the transponder should be connected to the rx on the MGL as well? Thanks for any and all help.