Antenna Networks; Network Topologies; Fig. 3-1: The Tree Structure - Devolo dLAN 200 AVpro Project Manual

devolo dLAN® 200 AVpro Project Manual

3 Antenna networks

Antenna or coax networks are typically organized in one of the following structures:

Star structure

Tree structure, or

Combinations of the two above mentioned structures.
In Germany, the tree structure is by far the most popular network type, as it is easy
to install and requires the least amount of cable.
Please note that the figures in this manual show schematic views.
Depending on the producer of the different accessories (above all of diplex
filters), the type and, thus, the wiring can differ. The schematic views of the
diplex filters in this manual follow the products by Comega. You can find a
list of specific suppliers and circuit layouts on our website under
http://www.devolo.com/business/accessories-referencelist.html.
3.1

Network topologies

In a tree structure, you can usually find network branches with each 4 to 10
antenna sockets, distributing the TV signal to the different viewers. For the purpose
of an efficient supply by dLAN adapters, these branches can be combined to larger
segments. Here, multiple branches are fed by one dLAN adapter as the so-called
master.

Fig. 3-1: The tree structure

Star structures are typically used in networks designed for satellite reception. You
should always feed in the dLAN data signals via the terrestrial input of the
multiswitch. Please note that this input has to be back channel compatible, so that
the data can be sent back from the receiver to the transmitter (see also section 2.2 in
this project manual).
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