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DIGITAL RADIO GUIDE APPENDIX A: EUREKA 147
101
In MOT, the "table of contents" function is handled by the MOT Directory Object and its operation
is illustrated below:
If we replace the file animals/lion with a new file called animals/tiger, the carousel would then
appear as shown below:
The receiver can tell that the carousel has changed because the Directory Object has a new
version, and by comparing the old and new Directory Objects, it can immediately determine that
the file animals/lion has been replaced by animals/tiger.
The MOT Directory Object serves two functions:
To provide reliable management of the files so that any changes to the carousel are understood
by the receiver.
To provide a name and other information for each file so that it may be accessed by an
application.
Dynamic Label
This application carries text information and control characters with a length up to 128 characters
in the PAD channel. It requires a simple alphanumeric text display of 2 lines, 32 characters each.