Handbook
Table Of Contents
- AMENDMENT LIST RECORD SHEET
- INTRODUCTION
- 1.SAFETY CONSIDERATIONS
- 2.OVERVIEW/SYSTEM DESCRIPTION
- 3.SPECIFICATION
- 3.150-063701 Parts Lists
- 3.1.1Base Antenna Side UHF Duplex/PA Shelf 50-063702 Parts List
- 3.1.2Downlink UHF 5 Channel Shelf 50-063703 Parts List
- 3.1.3Uplink UHF 4 Channel Shelf 50-063704 Parts List
- 3.1.4Tunnel side UHF Duplex/PA Shelf 50-063705 Parts List
- 3.1.5UHF Simplex Shelf 50-063706 Parts List
- 3.1.6Power Supply Shelf 50-063707 Parts List
- 3.2Technical Specification
- 3.3Mechanical Specification
- 3.150-063701 Parts Lists
- 4.SYSTEM DRAWINGS
- 4.1Drg. No. 50-063751, Channelised Cell Enhancer Rack Layout Drawing
- 4.2Drg. No. 50-063781, Channelised Cell Enhancer System Diagram
- 4.3Drg. No. 50-063792, Base Side Duplex Shelf Outline Drawing
- 4.3Drg. No. 50-063793, Downlink Channels Shelf Outline Drawing
- 4.4Drg. No. 50-063794, Uplink Channels Shelf Outline Drawing
- 4.5Drg. No. 50-063795, Tunnel Side Duplexer Shelf Outline Drawing
- 4.6Drg. No. 50-063796, UHF Simplex Shelf Outline Drawing
- 4.7Drg. No. 50-063797, Power Supply Shelf Outline Drawing
- 5.SUB-UNIT MODULES
- 5.1UHF Duplex Shelf 50-063702
- 5.25 Channel UHF Downlink Shelf 50-063703
- 5.3UHF Uplink 4 Channel Shelf 50-063704
- 5.4UHF Duplex/PA Shelf 50-063705
- 5.5UHF Simplex Channel Shelf 60-063706
- 5.6Power Supply Shelf 50-063707
- 6.INSTALLATION
- 7.MAINTENANCE
- APPENDIX AINITIAL EQUIPMENT SET-UP CALCULATIONS
Denver Channelised CE
User/Maintenance Handbook
Handbook Nō.-50-063708HBKM Issue No:-2
Date:-03/11/2003
Page:-
12 of 51
The Uplink duplex channel frequencies are factory set:
452.050MHz
453.225MHz
452.300MHz
452.775MHz
The four Uplink duplex channels arrive in the Base side chassis and pass through a 21dB
gain then a 15dB gain LPA driver before a 23dB gain 20Watt Power Amplifier. There is an
isolator fitted at the PA output to provide protection from the Uplink simplex channel path.
A 2 way combiner then combines the four duplex channels with the simplex channel and a
bandpass filter then connects to the Base Antenna port 2.
In the Simplex chassis, the Uplink path from the Uplink Channel chassis is first routed
through two ALC attenuators to mute the input to the Uplink channel selectivity module
when a Downlink simplex signal is being passed in the other path. A channel selectivity
module, set for 452.850MHz, then gives 25dB of gain and has an ALC level of -17dBm.
The module is followed by a 31dB gain LNA and then a 15dB gain LPA with an isolator at
the output to provide protection from the duplex path PA. The Uplink simplex signal then
connects to the Mobile side chassis for routing to the 2 way combiner.
The Power Supply Unit operates from an AC supply of 110V and has a 7.5Ampere circuit
breaker to switch the chassis On or Off. A 15A filter then provides some protection against
instabilities in the AC supply. There are two 400Watt PSU modules fitted and the outputs of
these are distributed to six 24V DC output sockets at the rear of the Power Supply chassis.
The RF connectors used for user interface are ‘N’ type female and interconnecting RF
chassis connectors are SMA female. Each of the five RF chassis has a DC input fuse and the
front panels have a green ‘Power ON’ LED and a red ‘ Alarm’ LED. The Power Supply
chassis has a single green ‘Power ON’ front panel LED.
Each chassis has a summary alarm output connecting to the Krone block at the lower rear of
the rack for user interface. In addition, the 19” rack has intruder alarms fitted to the front and
rear doors of the rack. The alarm outputs may be connected to singly or in parallel as a rack
summary. The alarm outputs are voltage free dry contacts being Closed in normal operation
and Open in an Alarm state.