World Broadcasting Unions Digital Radio User Manual - page 101

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the file animals/lion has been replaced by animals/tiger.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.