User Manual

AXELL MBF MULI-BAND FIBER REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd 19
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To set the proper operating RF levels on the repeaters in the MBF family during commissioning there
are six steps to be carried out for each band of operation.
 Set OMU DL attenuation to adjust the RF level from the BTS to suit the fibre optic converter in
the OMU (UFO-M)
 Run the OLA (Optical Link Adjustment) command for each band to correct for DL optical fibre
loss
 Set the DL attenuation in the repeater to adjust gain following fibre optic converter in the
repeater (UFO-S)
 Set the UL attenuation in the repeater to adjust gain before the fibre optic converter in the
repeater (UFO-S)
 Run the OLA (Optical Link Adjustment) command for each band to correct for DL optical fibre
loss
 Set OMU UL attenuation to adjust the OMU output level to suit the BTS
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In the downlink the signal from the OMU enters the fibre optic converter in the repeater that
translates the optical signal to RF. The signal is fed to the Radio Modules. The signals are amplified
in the Radio Modules and further in the separate MCPAs. It is then fed to the combined duplex filter
and out on the server port to the antenna.
In the uplink the signal is amplified in the Radio Modules and translated to an optical signal and fed
back to the OMU.
A tri band repeater works in a corresponding way.
3-1. Single band repeater for E-GSM
Duplex
Filter
RF
O
Optical
In/Out
Downlink
RF in/out
Fiber Optic
Converter
Radio Module
GSM
MCPA GSM
Uplink
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