User Manual

MBF, Multi Band Repeater
PRODUCT DESCRIPTION AND USER'S MANUAL
© Axell Wireless Ltd A 200 93 00, rev E 85 (105)
Set attenuation level
in uplink and
downlink to a
maximum
Choose the maximum attenuation value from the drop down menu.
Configure the
downlink
ON
ONON
ON
- 19.0 dBm
dBmdBm
dBm
33 dBm
dBmdBm
dBm
Lower the attenuation level step by step until the desired output power level is
reached. In this example +33 dBm. Zero attenuation is the same as maximum gain.
Note! Please also consult the OMU User’s Manual.
Initiate a fibre loss
elimination
This is done from the OMU by sending a pilot tone to the repeater and calculating the
loss in the fibre link. This loss is compensated for automatically. The system will
behave as if there is no loss at all in the fibre link.
Configure the uplink
In the uplink direction the attenuation needs to be set based on a measurement of a
known signal which is transmitted through the repeater and the OMU as well as the
fibre. There are two ways of performing this measurement.
Alternative 1
Use a signal generator to insert a signal of approximately -70dBm into the repeater’s
server antenna port. Measure the signal level on the BTS or on the coupler and adjust
the attenuation so that the total gain in the uplink is close to 0dB. (At 0dB gain the
signal level at the coupler should be -40dBm and on the BTS -70dBm in this
example.)
Repeater
Signal
Generator
Fiber
-70dBm
BTS
-30dB
Coupler
OMU
-40dBm
-70dBm
Alternative 2: Use the RMC to
measure the uplink at the OMU
Alternative 2
Use a signal generator to insert a signal of approximately -70dBm into the repeater’s