j,

thanks for your post. Yesterday, I came across GenerateRCx which translates shortform 1 and shortform 2 RC5X codes into learned codes which worked well.

I have the Marantz excel sheet that lists all the RC5/5X codes for their receivers and was using that to build on our existing RTI database.

Thanks for the Marantz link though, there are a few devices I may scan from there...

-e