User Manual

Table Of Contents
OPTICAL MASTER UNIT
PRODUCT DESCRIPTION AND USERS MANUAL
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The Axell Wireless OMU is a scalable, RF to optic signal conversion unit. The unit is installed near
the Base Station and is used in combination with fibre fed repeaters to provide wireless coverage for
remote sites located at a distance of up to 20Km (12.42 miles) from the Base Station.
The OMU taps the signal directly off a base station via a coupler and performs the RF to optic
conversion of the base station signal for transmission to the fibre connected repeaters. (In the uplink,
the procedure is reversed).
The OMU can either be installed at the BS or connected directly to a repeater. In that case the signal
is tapped from the repeater’s service antenna.
An OMU can be equipped to be used for frequency ranges from 88MHz to 2170MHz.
A single OMU unit supports up to 6 fibre optic converters, where each converter provides the signal
conversion for one Repeater. The system can be expanded to support up to 24 Repeaters.
The figure below illustrates an OMU system with six F/O converters and two power supplies.
Figure 1. Example of OMU System
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Frequency ranges from 88MHz to 2 170MHz.
WDM technology (Wavelength Division Multiplexing) – single fibre connection to each
Repeater
Each OMU supports up to 6 Repeaters
Scalability – up to four OMUs can be cascaded for support of up to 24 Repeaters
Single-source management cascaded OMUs can be controlled via the 'Master' OMU
Two independent power supplies (in the unit)can be used to either:
allow for flexibility in power supply source selection according to the type of voltage
available on site: 115 - 230VAC 50/60 Hz and 24 - 48VDC
provide power supply redundancy by installing two power supplies of the same type
Flexible RF signal source RF signal can be acquired either from the BS or from the Repeater's
Service antenna