Itel STL-SAT Changeover, Руководство пользователя

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3.5 Alternative frequencies
The RDS encoder allows the input of frequencies either with "A" method or with the "B" method.
The choice between the two methods depends on the network structure and the number of alternate
frequencies present.
There is no flag indicating to the receiver if alternate frequency tables are transmitted using "A" or "B"
method, the difference between the two methods is in the layout of the frequencies in the tables.
Note:
You can not compile different lists using Method A and B at the same time.
Method A is to be used only when the network has a maximum of 25 frequencies and does not program
regionally differentiated.
Method B is used instead when the alternate frequencies are greater than 25 or when, within the same
network, regional programs, such as local newsletters, are broadcast only on some frequencies.
The lists must be filled out from the first and filled in without leaving empty lists: the lists next to the first
empty list will not be transmitted.