User Manual

Channel Selective GSM Repeater
A cabinet (the left part in Figure 5-1) for a channel selective GSM
repeater can be equipped with four CHA channel boards, two downlink
boards (DL) with two internal channels each and two uplink boards (UL)
with two internal channels each. The described cabinet has a capacity of
four bi-directional GSM channels.
The cover (the right part in Figure 5-1) can be equipped as well, which
gives up to eight GSM channels. The cover board positions are shown in
the figure.
Channel selective GSM repeaters are used for GSM, DCS and PCS types
of TDMA systems.
Main units: ALI Alarm Interface board
CHA Channel Selective Amplifier board, GSM type
CMB Combiner unit
CU Control Unit board
DC Directional Coupler
DPX Duplex filter
LNA Low Noise Amplifier
PSU Power Supply Unit
RIA Repeater to Repeater Interface Adapter (optional)
123 4
567 8
CHA1
DL
(2 ch.)
MS
Mobile station
antenna
BS
Base station
antenna
CHA2
DL
(2 ch.)
CHA3
UL
(2 ch.)
CHA4
UL
(2 ch.)
LNA DL
Downlink
LNA UL
Uplink
CMB
Downlink
DPX
MS
CU
ALI
DC
MS
DC
BS
CMB
Uplink
DPX
BS
PSU
RIA
CHA5
DL
(2 ch.)
CHA6
DL
(2 ch.)
CHA7
UL
(2 ch.)
CHA8
UL
(2 ch.)
Figure 5-1. Channel selective GSM repeater
Functional Description AR Repeaters ALLGON System AB
5 - 4 Rev. P1A 2000-09 User’s Manual VD203 66/EN