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GSM850MHZ DIGITAL CHANNEL
This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved.
The information contained herein is confidential and the property of Comba a d is supplied without liability for errors or
omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The
copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.
RX-8123 II2 QI
ENU Status : 1-0-1
USER MANUAL FOR RX-8123
RX-8123
SELECTIVE REPEATER
USER MANUAL
Copyright - refer to title page
The information contained herein is the
responsibility of and is approved by the
following, to whom all enquiries should
be directed in the first instance:
Comba Telecom Ltd.
Page 1
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Summary of Contents for COMBA RX-8123
- Page 1 This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved. The information contained herein is confidential and the property of Comba a d is supplied without liability for errors or omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.
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Page 2: Table Of Contents
USER MANUAL FOR RX-8123 CONTENTS Section Page 0.2 CONTENTS ........................... 2 0.3 INDEX TO FIGURES AND TABLES ..................4 0.4 HISTORY ..........................5 0.5 GLOSSARY OF TERMS ....................... 6 0.6 SAFETY NOTICES AND ADMONISHMENTS ..............7 ... - Page 3 USER MANUAL FOR RX-8123 6 MAINTENANCE ........................31 7 APPENDICES........................32 7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE ......... 32 7.2 APPENDIX B: SERVICING POLICY AND RETURN OF EQUIPMENT ......33 ...
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Page 4: Index To Figures And Tables
USER MANUAL FOR RX-8123 INDEX TO FIGURES AND TABLES Figure 1: RX-8123 System Diagram ......................9 Figure 2: RX-8123 Internal Layout ......................10 Figure 3: Mounting Rack Overview ......................15 Figure 4: Wall Mounting ..........................16 Figure 5: Pole Mounting Overview ......................17 Figure 6: Bottom Panel Interface Diagram .................... -
Page 5: History
USER MANUAL FOR RX-8123 HISTORY Change No. Details Of Change 1-0-0 RX-8123 user manual first created on 24 Mar 2010. 1-0-1 Revised the modem cable drawing, KOP, front panel drawing as well as Thailand address in April 2011. RX-8123 II2 QI... -
Page 6: Glossary Of Terms
USER MANUAL FOR RX-8123 GLOSSARY OF TERMS Automatic Level Control Attenuation Antenna Feedback Cancellation Base Transceiver Station Cross Sectional Area Decibel Decibels relative to 1 milliwatt Downlink Duplexer Donor Terminal E/O, O/E Electrical/Optical, Optical/Electrical Frequency Shift Keying Fiber Optical Unit... -
Page 7: Safety Notices And Admonishments
USER MANUAL FOR RX-8123 SAFETY NOTICES AND ADMONISHMENTS This document contains safety notices in accordance with appropriate standards. In the interests of conformity with the territory standards for the country concerned, the equivalent territorial admonishments are also shown. Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained, authorized personnel. -
Page 8: General Information
USER MANUAL FOR RX-8123 1 GENERAL INFORMATION The RX-8123 GSM850 digital channel selective repeater is designed for 850MHz network. It can wireless transmit, two-way amplify GSM uplink and downlink signals and is designed for eliminating communicational coverage blind spots. By using the new Comba AFC (Antenna Feedback Cancellation) technique, the system isolation tolerance has been greatly improved: Imax>G-15dB, which was obliged... -
Page 9: Equipment Description
2 EQUIPMENT DESCRIPTION SYSTEM DIAGRAM Figure 1: RX-8123 System Diagram As shown in the above figure, the downlink BS signals go through DT port to the system and then to downlink by duplexer separation. The DL signals will go through DT duplexer then to AFC digital processing module for digital filtering and self-oscillation elimination. -
Page 10: Equipment Layout
USER MANUAL FOR RX-8123 EQUIPMENT LAYOUT The following figure shows RX-8123 internal layout. DL PA UL PA Distribution Board Duplexer AFC Digital Module VSWR Module Surge MODEM Arrestor Figure 2: RX-8123 Internal Layout RX-8123 II2 QI Copyright - refer to title page... -
Page 11: Equipment Constitution
USER MANUAL FOR RX-8123 EQUIPMENT CONSTITUTION RX-8123 consists of the modules described as below: Name Description Frequency Conversion Unit Can sampling, quantization and numbering and transmit BS IF unit signal into digital base band signal. AFC Digital Module Processes and filters base band... -
Page 12: Kit Of Parts
USER MANUAL FOR RX-8123 KIT OF PARTS For this system, the following are shipped: Product Identifier Description Quantity RX-8123 QI This equipment manual on CD-Rom Mounting Rack RRU-040L-5811 Fuse Delay fuse for PSU Local Commissioning Cable R-9122C/R-9122AC M10×110 Masonry Bolt... -
Page 13: Installation
USER MANUAL FOR RX-8123 3 INSTALLATION WARNINGS AND ALERTS Radio Frequency Energies There may be situations, particularly for workplace environments near high-powered RF sources, where recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases, restrictive measures or actions may be necessary to ensure the safe use of RF energy. -
Page 14: Site Planning Considerations
USER MANUAL FOR RX-8123 SITE PLANNING CONSIDERATIONS Site Considerations The site considerations are listed below: • The distance between the donor antenna and the BS should satisfy line of sight requirements for maximum coverage area. The received spots accept field intensity at least -70dBm. -
Page 15: Installation Procedures
USER MANUAL FOR RX-8123 INSTALLATION PROCEDURES 3.3.1 GOODS INWARDS INSPECTION 1. Verify the number of packages received against the packing list. 2. Check all packages for external damage; report any external damage to the shipping courier. If there is damage, a shipping agent should be present before unpacking and inspecting the contents because damage caused during transit is the responsibility of the agent. -
Page 16: Wall Mounting
USER MANUAL FOR RX-8123 3.3.4 WALL MOUNTING Drill holes on the wall by using the position of the four round holes on the Mounting rack as a guide. Insert the masonry bolts M10x110 through the round holes and tighten them to take the weight of the entire enclosure. -
Page 17: Pole Mounting Of Mounting Rack
3.3.6 DRIP-LOOP Comba recommends that every horizontal cable entry to the equipment forms a 'U' before its entry to the equipment. Water on the cable will drip down at the bottom of the loop and will not accumulate at the equipment connectors. -
Page 18: Equipment Connectors
USER MANUAL FOR RX-8123 EQUIPMENT CONNECTORS 3.4.1 CONNECTORS POWER MODEM ALARM Figure 6: Bottom Panel Interface Diagram The connection interfaces are shown below: Connector Description N-female connector, for external mobile antenna N-female connector, for external donor antenna Power Power Supply Interface... -
Page 19: Grounding Connection
USER MANUAL FOR RX-8123 3.4.2 GROUNDING CONNECTION Ground Connection To ensure safe operation of the product, a ground (earth) connection is required. For single phase AC power source, the product must be grounded by connecting the “earth wire” of the power cord to the ground terminal of the AC supply. -
Page 20: Connection Between Pc And Equipment
USER MANUAL FOR RX-8123 3.4.6 CONNECTION BETWEEN PC AND EQUIPMENT The below shows the connection: Monitoring Center Wire/Wireless Modem Network/PSTN Build-in Realize remote Wireless monitor Modern RS-232 RS232 cable Local Monitoring Figure 7: The Connection between Equipment and PC Note that when connect the RS-232 with PC, the equipment should be power off and Li-ion battery output connector is disconnected.
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