User Manual

Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 25 (86)
Example 2
In the example below there are separate inputs for Rx and Tx and no duplex filter. An external modem antenna
is connected and linked to the modem on the Control Module.
RF Backplane
Opto Module
RF
IN
RF
OUT
Control Module
External Alarm and Battery Module
Rack Com Board
Power Module B
Power Module A
Digital Backplane
DL Splitter
UL Combiner
Opto Module
RF
IN
RF
OUT
Opto Module
RF
IN
RF
OUT
Opto Module Opto Module
RF
IN
RF
OUT
Opto Module
RF
IN
RF
OUT
Opto Module
RF
IN
RF
OUT
RF in/out
External Modem Antenna
2.4 Back Panel
An OMU with one RF in/out The inside of the back lid with two plinths for power
connections, a duplex filter and one RF in/out
The back panel of an OMU unit has a layout as illustrated above. The layout can vary depending on the
configuration.
The connections are:
 Plinths for power connections are found on the inside of the back panel. There are two plinths. If two
modules with the same power feed are installed these plinths should be interconnected.
 Screw for earthing
 N-connector for RF input. There is one connector if the Rx/Tx input is combined and two connections if
the Rx and Tx are to be fed separately.
To gain access to the plinths for power connections, duplex filter, optional attenuators and optional coupler the
back panel needs to be opened. It is fastened with 4 screws.