User Manual

DELTANODE FIBER DAS MANUAL
©DeltaNode Solutions 2012
27
Revision 12-03
2.2.4 DMU – Remote head end
Deltanode’s DMU100 series is pickup repeater that can provide the signals over
fiber to a Master Unit or directly to up to 4 Remote Units. When the DMU is
used to transmit the signals to a Master Unit, the ordinary BGW is used to
control the system, but in case the Master Unit is not needed and it connects
directly to up to 4 Remote Units the DMU can be equipped with the compact
gateway, RGW, to provide for the settings and alarm handling for the entire
system.
Remote communication can be done either over Ethernet if that exists in the
location, or the unit can be equipped with a modem that allows it to set up a
tunnel to a Central Gateway CGW where it can be controlled properly. The
modem is normally a standard 3G modem but options may be possible if
needed.
It is possible to build the DMU with more than one band. However, depending
on the types of bands and the necessary duplexers it may need to be verified
with DeltaNode that your combination of bands are possible if the RGW is to be
included.
The chassis is the same as for the DeltaNode Remote Units (single chassis) and can handle a single band.
In the above example the DMU is used to pick up the signal at a remote location and then it is
transmitted on the fiber to four different locations that need coverage. The RU can be connected to
coaxial spreading networks if needed.
In the above figure the DMU is feeding a Master Unit (BMU) which in its turn feeds the Remote Units
(RU). This is a far more flexible solution and should be preferred when it is possible.
The DMU is usually not equipped with a powerful Power Amplifier (PA) in the uplink because the idea of
using it is to place the repeater where there is a good signal. The power level matches that of a mobile
phone.
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