User Manual

AXELL OPTICAL MASTER UNIT
PRODUCT DESCRIPTION AND USER’S MANUAL
16 © Axell Wireless Ltd
The OMU and the wireless modem operate on different
bands (for example an OMU for TETRA with a GSM
modem)
In this case the OMU will have one port where an external
antenna can be connected.
The connector is SMA type.
2
2
.
.
5
5
C
C
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o
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n
n
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c
c
t
t
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i
n
n
g
g
P
P
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o
w
w
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r
r
a
a
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d
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P
P
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-
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Caution!
Make sure the antenna cables or 50 ohm terminations are connected to the OMU’s antenna
connectors before the OMU is switched on.
Supply Power to the
OMU
The power feed to the OMU is attached via plinths found on the inside of
the back cover.
• 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.
Each OMU unit can be equipped with one or two power supplies. Either
two of the same type or two of different voltage.
There are power supplies for 115 - 230VAC 50/60 Hz and 24 - 48VDC. .
Note! Be careful to get the polarity right.
Each Power Supply can be switched off using the switches on the front
panel.
Caution!
Even if the power supplies are switched off the OMU still has live
power from the power input on the back.
Switch the OMU on
Switch on the OMU using the switches on the Power modules. The
modules operate in parallel and are independent of each other.
Also switch on the battery. When the battery is switched on it will be
recharged and ready to use when needed. If it is switched off it is not in
any way operational.
There are two green LEDs on the Power supplies
“Out OK” indicates that the power levels the unit is
delivering are OK
“In OK” indicates that the input power to the unit is
OK
Modem
ANT
To external
antenna
Power connection
plinths
In OK
Out OK