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
Band Selective Repeater
Figure 5-8 shows a block diagram of a band selective repeater. This
diagram is applicable to repeaters for e.g. NMT, TACS, ETACS, AMPS,
DAMPS and CDMA 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 band selective amplifier board (BSA).
DC
BS
P32
P31
P33
TEST -30 dB
DC
MS
TEST -30 dB
BSA - DL
PA - DL
LNA - DL
MS -20 dB
PA - UL
BSA - UL
LNA - UL
DPX
MS
DPX
BS
ALI
RIA
P34
CU
ALLGON
ALLGON
ALL
ALL
RCU
P27
PSU
ALI
ANT OUT
ANT
HI
LO
ANTOUT
ANT
HI
LO
IN OUT1 P101 P301
P4 P5
IN
IN
OUT1
P301
P101
P4P5
MSC
BAND
SELECTIVE
REPEATER
BS antenna
Base station
Telephone
line
Modem
Modem
Battery
External alarm sensors
MS antenna
R2R net
Figure 5-8. Block diagram, band selective repeater
Functional Description AR Repeaters ALLGON System AB
5 - 14 Rev. P1A 2000-09 User’s Manual VD203 66/EN