Worked with Avidyne Field Rep who was really helpful shortly after posting this. On the ARINC page: Input 1. High speed, EFIS/AirdataI'm doing a new IFD540 install (not a slide in replace for Garmin) but trying to get the ARINC setup to work into SV HDX. The SV Install manual ARINC settings don't look like the settings I see for ARINC in Setup Mode. What ARINC settings are needed from SV side and from IFD side to get ARINC to handle pushing all the VHF or GPS flight plan and HSI information? I assume once they are talking well at this level, my SV autopilot will just dovetail in to what ever the navigation source is. Help needed. Thanks.
Input 2: off. Output 1: High speed, Gama 429, Graphics.
On the VOR/LOC/GS ARINC 429 Config page: RX off, TX High Speed and Format: VHF 429. SDI: Common. I don't have DME so that setting doesn't matter. Thanks Nic at Avidyne for working with me on this.