Grundig Digital Radio - Manual (Page 61)

DIGITAL RADIO GUIDE TERRESTRIAL TRANSMISSION SYSTEMS - ISSUES
61
Figure 4.20: Estimation of the channel usage in Band III for T-DAB
(RPC4: suitable for mobile reception; RPC5: suitable for portable indoor reception)
0
100
200
300
400
500
600
5A 5B 5C 5D 6A 6B 6C 6D 7A 7B 7C 7D 8A 8B 8C 8D 9A 9B 9C 9D
10A 10B 10C 10D 11A 11B 11C 11D 12A 12B 12C 12D
Frequency Blocks
Number of Entries
RPC4 RPC5
Figure 4.20 shows that T-DAB mobile reception (RPC4) represents the major proportion
of the T-DAB requirements and that channels 11 and 12 are the most used for T-DAB.
The GE06 Agreement offers a great deal of flexibility for using a digital entry in the plan
for another application provided that the peak power density in any 4 kHz is respected.
Such flexibility can allow, for example, for using a DVB-T entry by 4 x T-DAB entries or by
4 x T-DMB entries and also can allow for accommodating future developments of digital
technology.
The end of the transition period for Band III has been fixed to 2015 (for some non-
European countries is 2020, see details in Figure 4.21). During that period analogue
television has to be protected. Around 25% of the T-DAB entries in the new plan have to
be coordinated with analogue television in neighbouring countries before implementation.
As a consequence, certain constraints (time constraints, power reduction, particular
antenna patterns, etc.) might be imposed to those T-DAB requirements during the
transition period. In addition, around 7% will have to coordinate with other digital
requirements and around 2.5% with other primary services (e.g., PMR - Private Mobile
Radio).