4.2 UHF Channel Selective Cell Enhancer Rack (50-146601) 4.2.1 Description The UHF cell enhancer in this system is a six channel, duplex only, two-way radio repeater rack with automatic gain control of both up and downlink paths. A dedicated power supply provides all the DC needed by the whole rack, driven from the local mains supplies (identical with PSU in VHF cell enhancer rack).
4.2.4 Parts List AFL Part Nǀ.
4.2.5 Downlink Combiner Shelf (50-146602) 4.2.5.
.2.5.1Description The UHF downlink combiner shelf receives signals from the outputs of the six BDA shelves and combines them using a series of bandpass, notch filters and hybrid couplers. The two UHF outputs then directly drive the leaky feeder antennas. This is a passive only shelf and has no need of a power source or alarms. 4.2.5.
4.2.5.4System Diagram, Drg.
4.2.6 Uplink Splitter Shelf (60-146603) 4.2.6.
4.2.6.1Description The UHF uplink splitter receives a single RF source (from the leaky feeder antenna(s) and directs it through hybrid couplers, bandpass and notch filters to the inputs of the UHF uplink BDA shelves. This is a passive only shelf and has no need of a power source or alarms. 4.2.6.
4.2.6.4System Diagram, Drg.
4.2.7 UHF Duplex Channel 1 BDA (50-146604) 4.2.7.
4.2.7.1Description The BDA shelves amplify the UHF digital signals at specific frequencies, selected by the channel control modules. They each have a gain of approximately 95dB and switched attenuators after the input amplifier and at the output so that channels may be individually set up for the best signal levels at the time of installation. 4.2.7.
4.2.7.3Parts List AFL Part Nǀ. 08-930003 10-000701 10-000901 11-007302K 11-007402K 12-001806 12-002201 12-002220 12-002826 13-001803 13-001822 17-004730 17-010809 19-000922KL 20-001601 80-008901 80-063920 91-030002 91-500001 91-510003 91-600001 91-620001 91-700017 96-100001 96-110012 96-600002 96-600003 Part Description 2 PORT ISOLATOR 360-470MHz SMA 1/4W0-30dB SWITCHED ATTENUATOR SW. ATTENUATOR 0.25W 0-15dB LNA. 380-500MHz 20dB (relay) KIT LNA.
4.2.7.4UHF Duplex Channel 1 BDA System Diagram Drg.
4.2.8 UHF Duplex Channel 2 BDA (50-146605) See section 4.2.7 4.2.8.1UHF Duplex Channel 2 BDA System Diagram, Drg.
4.2.9 UHF Duplex Channel 3 BDA (50-146606) See section 4.2.7 4.2.9.1UHF Duplex Channel 3 BDA System Diagram, Drg.
4.2.10 UHF Duplex Channel 4 BDA (50-146607) See section 4.2.7 4.2.10.1 UHF Duplex BDA Channel 4 System Diagram, Drg.
4.2.11 UHF Duplex Channel 5 BDA (50-146608) See section 4.2.7 4.2.11.1 UHF Duplex Channel 5 System Diagram, Drg.
4.2.12 UHF Duplex Channel 6 BDA (50-146612) See section 4.2.7 4.2.12.1 UHF Duplex Channel 6 BDA System Diagram, Drg.
4.2.13 4.2.13.
4.2.13.1 Description This uplink combiner receives all the UHF signals from the different duplex cell enhancer shelves and couples them together using a combination of bandpass filters and hybrids to the single Tx antenna. This is a passive only shelf and has no need of a power supply or alarms. 4.2.13.
4.2.13.4 UHF Uplink Combiner Shelf System Diagram, Drg.
4.2.14 4.2.14.
4.2.14.1 Description This UHF downlink splitter shelf couples the received UHF signals to the cell enhancers via bandpass filters and hybrids. This passive shelf has no connection to any power supply and no alarms. 4.2.14.2 Technical Specification PARAMETER Height: Shelf Width: dimensions: Depth: Temperature operational: range: storage: Weight: Impedance: Humidity: RF Connectors: Environmental protection: Case: Heatsinks: Finish: Handles: Fascia 4.2.14.3 AFL Part Nǀ.
4.2.14.4 UHF Downlink Splitter Shelf System Diagram, Drg.
4.3 800MHz Channel Selective Cell Enhancer Rack (50-146701) 4.3.1 Description The 800MHz cell enhancer consists of four dedicated shelves and features two, separate, IF channels tuned by independent channel selective modules (one 5.0MHz B/W, one 3.0MHz). The power supply shelf provides all the DC needed by the whole 800MHz system, driven from the local mains supplies.
4.3.4 800MHz Channel Selective C.E. System Diagram, Drg.
4.4 Channel Selective Uplink & Downlink Shelf (50-146702) 4.4.
4.4.1 Uplink & Downlink Shelf Description This 8U shelf holds all the electronics modules for the 800MHz BDA except for the downlink power amplifier shelf and the PSU shelf. The alarms are a volt-free, relay contact pair, ‘D’ connector pins 1 & 2. 4.4.
4.4.5 Uplink & Downlink Shelf Parts List AFL Part Nǀ.
4.5 800MHz Downlink Power Amplifier Shelf (50-146703) 4.5.
4.5.1 Downlink Power Amplifier Shelf Description The 100W amplifier shelf is a linearised Class A amplifier where 4 linearised power amplifiers are combined together in a series/parallel configuration which yields approximately double the output power per path. Its housing is a 4U 19” Rack with SMA connectors for the RF input/output, 2 DType connectors for the alarm function and 2 DC connectors with fuse for the 24 DC supply. Its cooling is realized by fans mounted on the front panel.
4.5.5 Downlink Power Amplifier Shelf Parts List AFL Part Nǀ.
4.6 Multiband Combiner Shelf (50-146705) 4.6.
4.6.1 Multiband Combiner Shelf Description The multiband combiner performs the task of receiving all three frequency bands (VHF, UHF & 800MHz), passing them through a series of crossband couplers and a hybrid combiner to the two exit ports, DAS1 & DAS2. This is an entirely passive unit using no active devices, no power supply and therefore no alarm interface. 4.6.
4.6.4 Multiband Combiner Shelf System Diagram, Drg.
5. INSTALLATION 5.1 Initial Installation Record When this equipment is initially commissioned, please use the equipment set-up record sheet in Appendix B. This will help both the installation personnel and AFL should these figures be needed for future reference or diagnosis. 6. FAULT FINDING & MAINTENANCE 6.1 General Fault Finding Procedures In the event that the performance of the system is suspect, a methodical and logical approach to the problem will reveal the cause of the difficulty.
5.2 Downlink Confirm that there is a signal at the expected frequency and strength from the base station. If this is not present then the fault may lay outside the system. To confirm this, inject a downlink frequency signal from a known source at the master site BTS input and check for output at the remote site feeder output. If a signal is not received at the output it will be necessary to follow the downlink path through the system to find a point at which the signal is lost.
5.8 General Maintenance Procedures Many of the active modules contain semiconductor devices utilising MOS technology, which can be damaged by electrostatic discharge. Correct handling of such modules is mandatory to ensure their long-term reliability. To prevent damage to a module, it must be withdrawn/inserted with care. The module may have connectors on its underside, which might not be visible to the service operative. 5.
Fitting a new power amplifier module will be the exact reverse of the above. Note: Do not forget to apply fresh heatsink compound to the heatsink/main case joint and also between the amplifier and the main case. 5.12 Low Power Amplifier Replacement Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA. Disconnect the RF input and output cables from the LPA. Disconnect the alarm connector. Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
APPENDIX A Amendment List Record Sheet Issue No. A 1 Date 18/10/2006 Incorporated by Page Nos. Amended Reason for new issue CMH 1st Draft CMH 1st Issue Document Ref.
Glossary of Terms Repeater or Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals. Band Selective Repeater A Cell Enhancer designed for operation on a range of channels within a specified frequency band. Channel Selective Repeater A Cell Enhancer, designed for operation on specified channel(s) within a specified frequency band. Channel frequencies may be factory set or on-site programmable.
Handbook Number: 80-283501HBKM F E D C B A Bronx Justice Centre Radio Repeaters Page: 84 of 86 GD APPD 10/05/00 DA TE RF 1 A LL DIM E NS IONS A RE IN m m UNLE S S OTHE RWIS E S TA TE D MB CHK D PL DRA WN RF FR E QU E N C Y P R OG R A MMI N G D A TA B / W=30 t o 200kH z BTS 2 HI IN OUT R.S .
EC Declaration of Conformity In accordance with BS EN ISO/IEC 17050-1&-2:2004 Aerial Facilities Limited Aerial House Asheridge Road Chesham Buckinghamshire HP5 2QD United Kingdom DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT: PRODUCT PART NO[S]: 50-146501, 50-146601, 50-146701 PRODUCT DESCRIPTION: Radio Repeater Equipment IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES: 1999/5/EC and The Radio & Telecommunications Terminal Equipment Directive Annex V its amending directives HAS BEEN DESI
APPENDIX B Initial Equipment Set-Up Calculations General Information Site Name: Date: Client Name: AFL Equip. Model No. Antenna Systems Model Gain Azimuth Comments Type Loss Length Comments A - Service Antenna B – Donor Antenna C – Service Feeder D – Donor Feeder Initial Parameters E – CE Output Power F – Antenna Isolation G – Input signal level from donor BTS Operating Voltage dBm dB dBm V Downlink Calculations Parameter Input signal level (G) CE max.
