User Manual

Table Of Contents
Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 18 (86)
2.2.2 UL Combiner and DL Splitter
2
The UL Combiner and DL Splitters are placed in slots 4 and 5.
These two modules contain the combiners and splitters that combine and distribute the RF signals between the
OMU’s RF port and the Fibre Optic Converters. They also contain attenuators that are used for setting the
master signal levels in the downlink and uplink.
Via these modules the RF in/out can be connected on the front of the OMU instead of the back, if needed.
The connectors are QMA type.
The modules can to be configured in two ways as shown in the illustration below.
RF in
DL out
UL in
RF out
RF in
DL out
UL in
RF out
RF in
DL out
UL in
RF out
Alternative 1
Alternative 2
Input to OMU
In Alternative 1 the connectors on each module are linked and the input to the OMU is made via the N-
connectors on the back of the OMU. See also illustration below.
In Alternative 2 the input to the OMU is made via the QMA connectors marked RF in/RF out.
DL
OMU front side
DL out
RF in
UL in
RF out
Fibre port
RF in
RF out
Fibre Optic
Converter
Optional links
UL
Combiner
OMU back side
DL
Splitter
UL
Note! In the illustration above only one Fibre Optic Converter is shown. The other converters are connected in
a corresponding way.
The configuration at delivery is Alternative 1.
2
In some cases, for specific needs, these modules can be designed in alternative ways.