The personal transponders will count on the older AMB systems. Each personal has a seven digit code on it, for example:

7777771

The final digit -- in this case the "1" -- indicates which number the transponder will count as. So you could use the above transponder as a "1" with an old AMB system, or at least, it worked at our track with our older AMB system, so I can only assume it is the same everywhere else. We are now running the new digital AMBrc system though.

If I'm wrong, somebody please correct me.