User Manual

Table Of Contents
Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 56 (86)
A Band Selective Filter can be installed between the coupler and the antenna to
prevent signal disruptions from the OMU.
Connect the modem If the OMU is equipped with a wireless modem an antenna for the modem is
necessary. This can be realized either via a separate antenna or via a coupler on
the RF in/out port in the OMU.
The coupler can only be used if the OMU runs on the same frequencies as the
modem and the Rx/Tx is combined (there is a duplex filter).
The separate antenna is plugged in to the Antenna connector on the far right end
of the OMU. The connector is SMA.
If the OMU is equipped with a PSTN modem the connector is placed in the
Modem Unit. The connector is RJ11
The Ethernet connection is placed on the Control Module. The connector is RJ45.
Connect the fibers The fibre connectors on the Fibre Optic Converters are SC/APC type.
Note!
Angled connectors, APC, need to be used throughout the whole link between
the OMU and the repeater. The angle needs to be 8 degrees.
Also the ODF connections need to be APC type.
The fibre must be monomode type.
The fibre from each Fibre Optic Converter is connected to an ODF (Optical
Distribution Frame) unit. The ODF is a cross connection for fibre cabling. At the
site of the repeater, there is also an ODF for further connection to the repeater.
Note! Be careful with the fibers. They cannot be bent too sharply. Make sure there
is enough room to safely close the door of the sub rack. Clean the fibers before
they are connected. See instruction below.
Caution
Un-terminated optical receptacles may
emit laser radiation. Do not stare into beam
or view with optical instruments.
Cleaning Optical Connectors
Optical reflections from a discontinuity such as a poor connector interface appear
on an RF spectrum analyzer trace as stable variations in the noise floor amplitude
that are periodic with RF frequency. If the reflection is bad enough, it could
impact the system performance. By far, the most common cause for a large
discrete reflection is a dirty optical connector. A bit of dust or oil from a finger
can easily interfere with, or block this light. Fortunately, it is very easy to clean
the connector.
Be sure to use the correct procedure for the given connector. When disconnected,
cap the SC/APC connector to keep it clean and prevent scratching the tip of the
ferrule.