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 CDMA Repeater
Figure 5-7 shows a block diagram of a channel selective CDMA repeater.
This diagram is applicable only to repeaters for the CDMA system.
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 board (CSA), which has two parallel channels.
DC
BS
P32
P31
P33
TEST -30 dB
DC
MS
TEST -30 dB
PA - DL
LNA - DL
MS -20 dB
PA - UL
LNA - UL
CSA - DL
DPX
MS
CSA - UL
ALI
CU
RCU
P27
ALI
PSU1
PSU2
DPX
BS
BA
ANT OUT HI
LO
ANT
ANTOUT
ANT
HI
LO
IN OUT1 P101 P301
P4 P5 P3 P4
IN
OUT1
P101
P301
P4P5
MSC
CHANNEL
SELECTIVE
CDMA
REPEATER
BS antenna
Base station
Telephone
line
Modem
Modem
Battery
External alarm sensors
MS antenna
High power
CDMA only
Figure 5-7. Block diagram, CDMA repeater
Functional Description AR Repeaters ALLGON System AB
5 - 12 Rev. P1A 2000-09 User’s Manual VD203 66/EN