Grundig Digital Radio User Manual download pdf (Page 61)

DIGITAL RADIO GUIDE TERRESTRIAL TRANSMISSION SYSTEMS - ISSUES

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)

100

200

300

400

500

600

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).

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Grundig Digital Radio User Manual Page 61