User Manual
Table Of Contents
- Front Page
- Pretext
- Contents
- Figures
- Abbreviations
- 1. Safety
- 2. Introduction
- 3. Installation
- 4. Commissioning
- 5. Functional Description
- Repeater Design
- Block Diagram
- Board and Unit Descriptions
- DC - Directional Coupler
- DPX - Duplex Filter
- LNA - Low Noise Amplifier
- CHA - Channel Amplifier Board for Channel Selective Operation
- CSA and PA Boards for Channel Selective CDMA Operation
- BSA and PA Boards for Band Selective Operation
- DIA Board
- CU Control Unit Board
- Repeater CU Software and Hardware Compatibility
- Cabling
- 6. Optionals
- 7. Repeater Alarms
- Index
- Questionnaire
Channel Selective GSM Repeater
Figure 5-6 shows a block diagram of a channel selective repeater with four
bi-directional channels. This diagram is applicable to repeaters for the
GSM, DCS, PCN and GSM 1900 (PCS) systems.
Downlink signal path
The signal from the base station is received via the repeater BS antenna
and is then forwarded through a directional coupler (DC). The signal
passes a duplex filter (DPX), is amplified in a low noise amplifier (LNA),
and enters the channel boards (CHA), which have two parallel channels
each.
DC
BS
P31
P33
TEST -30 dB
DC
MS
TEST -30 dB
CHA1 - DL
CHA2 - DL
CHA3 - UL
CHA4 - UL
DPX
BS
LNA
DL
CMB
DL
MS -20 dB
DPX
MS
ALI
RIA
CU
P34
ALLGON
ALLGON
ALL
ALL
RCU
P27 P32
PSU
ALI
ANT OUT
ANT
HI
LO
HI
LO
IN
OUT1
OUT2
P101
P701
P101
P701
ANT
OUT ANT
P101
P101
P701
P701
LNA
UL
IN
OUT1
OUT2
CMB
UL
MSC
CHANNEL
SELECTIVE
GSM
REPEATER
BS antenna
Base station
Telephone
line
Modem
Modem
Battery
External alarm sensors
MS antenna
R2R net
Figure 5-6. Block diagram, channel selective repeater
Functional Description AR Repeaters ALLGON System AB
5 - 10 Rev. P1A 2000-09 User’s Manual VD203 66/EN