We have a group of very smart enthusiasts working on Airbus avionics. Today I received some help from Christoph and James to get the ATC transponder and Radio Management Panel turned on.
Christoph is the founder of Cockpit Concept and manufactures Airbus panels, ARINC interface boards, and other electronics. In addition, Christoph developed the CPDLC client for use with Jeehell FMGS (if you have not tried it out, what are you waiting for?) and also runs the FMGS Mantis Bug Tracker.
The ATC transponder requires 115 VAC to operate. Unfortunately this is not readily available and you will be required to purchase a static inverter to transform direct current into alternating current. Volker (another smart German 🙂 was very helpful in helping me find a 28V DC to 115 V AC inverter.
With Christoph help the LCD finally came alive. Although there has been some damage to the LCD screen (digits 1 and 2 not fully visible), it looks like it can still be put to good use in the sim.
James was able to provide me with the information that ‘SDI Code’ has to be connected to ‘SDI Code Common’ (
whatever that means – update: James has informed these pinouts allow you to assign the RMP as either Captain, First Officer, or backup radio) for the RMP. When this was all linked up I was happy to see the RMP display in good working order. An additional ground wire was required for 8.33 KHZ function (European airspace).
Both panels will still require an interface board to connect and function with a simulator.
Backlight 1/2 (5v)
115 vAC input 3
AC Ground 4
Radio Management Panel
24-28VDC Power Input N
Power Input Ground R
Assign RMP position (connect to each pin): L+K – RMP1 (Captain), J+L – RMP2 (F/O), J+K+L – RMP3 (Overhead backup)
8,33 KHZ Function X (connect to common ground)
Backlight (5v) T/U
Selection bulbs and SEL light 5VAC t/u (lowercase, RMP must be turned on)
Chassis Ground V
Light and Static Display Test S/Ground