Originally Posted by az_gila
I'm still in the process of installing the GTX335 in my Tiger, but the on-line documents come with a "setup guide" and an ".exe" file for a PC. Garmin gives you access to these documents online when you register your unit.
Do you have a PC laptop available? If so it seems like the GTX335 can be fully programmed step by step via the provided USB port.
You do have the USB input connected don't you?
I had Steinair build me a conversion harness so I do have the USB port wired into the GTX 335 (but it's a different type of USB harness than I'm use to seeing). It's a good thing I had Steinair build me the harness because there was a lot to this installation that I didn't understand and wouldn't have accomplished if I'd attempted to do the wiring myself (Example: Wire in a USB hub and Keep GPS Alive wiring). Best money spent!
I have not registered the unit yet (thinking I'd wait until I installed it) but again this lack of knowledge (understanding) on my part identifies the challenge of a self installation for a rookie. Electronics is not my strongest suit but being "cheap" is what makes me attempt things like this. Most of the time it works out because tenacity keeps me at it until I figure things out (usually with a lot of questions and help in between). But this is what I like about RVs and the VAF community and also the education that projects like this provide.
I didn't build this RV (bought it two and a half years ago from the original builder) but have since fixed a large number of "build quality issues", installed several electronic enhancements such as wiring up adsb "in", moving magnetometers because the builder placed them too close to the radio antenna resulting in serious heading issues, replacing a failed autopilot controller, removing manual trim and installation of electric elevator and aileron trim with Pat Hatch's Ultimate Trim Hub controller, removal of two button grips and installation of dual five button military style grips with coolie hat trim, transponder ident, PTT and CPTT, A/P connect/disconnect, flaps, and freq/comm swap using a lot of the functionality that my Aerotronics panel had previously been wired for.
Often these projects start out with a simple idea and very conservative time line and grow into major projects because I didn't initially recognize the complexity of the idea in the beginning. I just bring this up because it demonstrates my willingness (maybe stupidly) to tackle projects that I deem important.
So while I'm not the original builder I still use the RV experience to expand my knowledge and keep myself busy in retirement. Long answer to why I'm having trouble understanding what the installation manual says and why programming has been such a challenge.
G3Xpert saw my thread on this and sent me another email which helped my thinking process a little. I'm reviewing the old 330 setting pictures I took before removing the unit, cross referencing them to his email and the manual, and will look at my EFIS general settings to see what serial port feeds data to the transponder. Hopefully doing these steps and calling Steinair in the morning when I'm at the plane will quickly resolve this crisis for me.
Once again the VAF community and its advertisers prove why these aircraft and associated avionics are so great!