User Manual

AXELL MBF MULI-BAND FIBER REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd 3
1
1
.
.
4
4
A
A
L
L
C
C
The repeater has a constant gain in both uplink and downlink paths. The gain is set by defining the
attenuation as described above.
The repeater has a defined maximum output level. If the input signal amplified by the gain set
exceeds the set output limit, an ALC (Automatic Level Control) loop is activated. This ALC ensures
that the amplifier does not add distortion to the radio signal. Below are examples of the ALC function
for one and two carriers.
1
1
.
.
5
5
O
O
p
p
e
e
r
r
a
a
t
t
i
i
n
n
g
g
T
T
e
e
m
m
p
p
e
e
r
r
a
a
t
t
u
u
r
r
e
e
Note! The MBF repeaters are designed primarily for multi carrier purposes. If the repeaters are run
at full output power over a longer period the convection cooling might not be enough. The repeaters
have a power management function implemented that will step down the power and if needed fully
shut down the amplifier chains until temperature has reached normal values. In situations where a
repeater will be run in such a manner extra cooling can be provided for instance by putting the
repeater in a temperature controlled environment or via external fans.
1
1
.
.
6
6
M
M
B
B
F
F
I
I
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
s
s
The MBF unit provide three types of interfaces:
• Securing interfaces – lock and screws for security
• Panel connections to RF, communication and power
• Internal connections for local setup and for connecting optic fibres and power connections that
are routed in from the
ALC one carrier
Input signal, dBm
Output power, dBm
+36,5
+33,8
-24 -16
Gain: 60 dB
+35
ALC two carriers