This is the one area of XM's system that isn't on par with Sirius. Why they designed their system with the stupid 16 character limitation makes no sense. If Sirius uses the full 36 characters that their system supports to do the PAD info then it will always cut off at 16 characters on XM tuners. Sirius will need to add that extended field data, which is what newers XM tuners support. Sirius currently doesn't have such a field in use. So this is a technical issue that will have to be resolved between the two systems.