Structure of DTV Networks and Transmitting Stations - Digital Video and Audio Broadcasting Technology - page 526

mountain ranges of the Bavarian Forrest at approx. 1000 m above sea
level. The 4 transmitting stations broadcast 3 DVB-T transport streams,
some of them at the same frequencies. Only public service programs are
distributed. The data rate per data stream is also approx. 13 Mbit/s. Alto-
gether, 12 programs are distributed. Fig. 31.1. shows the sites of the trans-
mitters in the DVB-T single-frequency network Southern Bavaria and Fig.
31.2. shows the sites of the transmitters in the DVB-T network Eastern
Bavaria. With 63 km, the distances between transmitters in the DVB-T sin-
gle-frequency network Southern Bavaria, consisting of the Olympic tower
and Mt. Wendelstein, are right on the limit of what is still allowed. In the
DVB-T single-frequency network Eastern Bavaria, the permissible dis-
tances between transmitters have been greatly exceeded in some cases and,
without inbuilt delay times, would lead to guard interval violations at some
sites. Table 31.1. and 31.2. list the technical parameters of both networks.

Trans
mitter

1+2

MIP
inserter

Distribution
link 1

MUX

Distribution
network
(ATM/SDH)

MPEG2
TS

MUX

MPEG2 TS

Distribution
link 2
(Spare)

MIP
inserter

1+2

(Spare)

(Spare)

Trans
mitter

Fig. 31.3. Feed of a transport stream from the playout center to the DVB-T trans-
mitters in the single-frequency network