User's Manual
Table Of Contents
- Front Page
- Contents
- Figures
- New Features in OMT32 Version R1A
- Abbreviations
- Part 1 – Hardware
- 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
- Part 2 – Software
- 6. OMT32 Installation
- 7. Help
- 8. Getting Started
- 9. OMT32 Features
- 10. Repeater Operations
- 11. Alarms and Events
- 12. Troubleshooting
- 13. Optional
- Appendix A - Menu Reference Guide
- Index
- Questionnaire
Channel Selective CDMA Repeater
Figure 5-6 shows a block diagram of a channel selective CDMA repeater.
This diagram is applicable only to repeaters for the CDMA system.
Downlink
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 dBPA - DL
LNA - DL
MS -20 dB P27
PA - UL
LNA - UL
DPX
BS
PSU ALI
CSA - DL
DPX
MS
CSA - UL
ALI
CU
MSC
RCU
CHANNEL
SELECTIVE
CDMA
REPEATER
BS antenna
Base station
Telephone
line
Modem
Modem
Battery
Power
supply
External alarm
sensors
MS antenna
Figure 5-6. Block diagram, CDMA repeater
ALLGON System AB AR Repeaters & OMT32 Hardware – Functional Description
User’s Manual VD202 90/EN Rev. 1A 1999-07 5 - 12