L.A. M.T.A. BDA Line Amplifier User/Maintenance Handbook For GETS Global Signalling LLC AWL Works Order Q115342 Product Part Nos. In-Line BDA Wall Mount 80-301401 In-Line BDA Rack Mount 80-301406 AFL and Avitec have merged to form Axell Wireless AXELL WIRELESS UK Aerial House Asheridge Road Chesham, Buckinghamshire HP5 2QD, United Kingdom Tel: + 44 (0) 1494 777000 Fax: + 44 (0) 1494 777002 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM info@axellwireless.com www.axellwireless.
Table of Contents 1. INTRODUCTION.......................................................................................................................... 7 1.1. Scope and Purpose of Document ............................................................................................. 7 1.2. Limitation of Liability Notice ...................................................................................................... 7 2. SAFETY CONSIDERATIONS .........................................................
.5.3. UHF BDA Unit (80-301404) Specification ........................................................................ 44 3.5.4. UHF BDA Unit (80-301404) Photographs ........................................................................ 45 3.5.4.1. Front View.................................................................................................................. 45 3.5.4.2. Underside view showing connectors ......................................................................... 46 3.5.4.3.
.5.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815).............................................. 85 4.5.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)................................................... 85 4.5.5.5. 30dB Bi-Directional Coupler (07-022005) .................................................................. 86 4.6. Downlink Output Shelf 80-301408 .......................................................................................... 87 4.6.1.
4.11.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram ....................................... 120 4.11.2. UHF Midband Amplifier Shelf 80-301410 Outline Drawing ......................................... 120 4.11.3. UHF Midband Amplifier Shelf 80-301410 Specification .............................................. 120 4.11.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations................................................ 120 4.11.4.1. Front View .......................................................
.3.6 Module Transportation ................................................................................................... 143 APPENDIX A ..................................................................................................................................... 144 A.1. Glossary of Terms used in this document ......................................................................... 144 A.2. Key to Drawing Symbols used in this document...........................................................
1. INTRODUCTION 1.1. Scope and Purpose of Document This handbook is for use solely with the equipment identified by the Axell Wireless Limited (AWL) Part Number shown on the front cover. It is not to be used with any other equipment unless specifically authorised by AWL. This is a controlled release document and, as such, becomes a part of the Axell Wireless Total Quality Management System. Alterations and modification may therefore only be performed by Axell Wireless.
2. SAFETY CONSIDERATIONS 2.1. Earthing of Equipment Equipment supplied from the mains must be connected to grounded outlets and earthed in conformity with appropriate local, national and international electricity supply and safety regulations. 2.2.
2.5. Chemical Hazard Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in devices within equipment produced by Axell Wireless Ltd. Beryllium oxide dust can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact. Products that contain beryllium are load terminations (dummy loads) and some power amplifiers. These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown above).
3. In-Line BDA Wall Mount 80-301401 The wall mount In Line BDA consists of 4 wall mount enclosures: 80-301402 the Combiner unit. 80-301403 which houses the VHF and UHF Low Band amplification modules. 80-301404 which houses the Mid and High band UHF amplification modules. 80-301405 which houses the 800MHz amplification modules.
3.1. In-Line BDA Wall Mount 80-301401 Specification ELECTRICAL SPECIFICATION Downlink 154.0 to 161.5 MHz VHF Uplink 155.5 to 161.0 MHz Downlink 460.4 to 460.5 MHz UHF Low Uplink 465.4 to 465.5 MHz Frequency Downlink 482.5 to 483.8 MHz UHF Mid Range Uplink 485.7 to 486.8 MHz Downlink 507.0 to 507.3 MHz UHF High Uplink 510.0 to 510.3 MHz Downlink 856.0 to 861.0 MHz 800MHz Uplink 811.0 to 816.0 MHz Passband Ripple ± 1.
3.1.1. In-Line BDA Wall Mount 80-301401 Overall system Diagram Drawing Number 80-301481 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.2. In-Line BDA Wall Mount 80-301401 List of Major Components Section 3.3. 3.4. 3.5. 3.6. 3.3. Component Part 80-301402 80-301403 80-301404 80-301405 Component Part Description Combiner VHF/UHF BDA Unit UHF BDA Unit 800MHz BDA Unit Qty Per Assembly 1 1 1 1 Combiner 80-301402 Splitter/Combiner 80-301402 is the main Splitter/Combiner unit.
3.3.1. Combiner 80-301402 System Diagram Drawing Number 80-301482 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.3.2. Combiner 80-301402 Outline Drawing Drawing Number 80-301492 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.3.3. Combiner 80-301402 Specification Downlink PARAMETER SPECIFICATION Insertion Loss from Downlink Input port to port indicated VHF Band to port 1 < 1.0dB at 154.0 – 161.3MHz UHF Low Band to port 2 < 3.5dB at 460.4 – 460.5MHz UHF Mid Band to port 3 < 3.5dB at 482.5 -483.8MHz UHF High Band to port 4 < 4.0dB at 507.0 – 507.3MHz 800MHz Band to port 5 < 1.0dB at 856.0 – 861.0MHz Insertion Loss from port indicated to Downlink Input test port VHF Band 30dB at 154.0 – 161.3MHz UHF Low Band 30dB at 460.
Environmental/Mechanical Specification PARAMETER Mechanical RF connectors Dimensions (excludes handles and connectors 3.3.4. 3.3.4.1. SPECIFICATION IP65 Wall Mount N type female 620mm x 620mm x 250mm (24” x 24” x 10” approx) Combiner 80-301402 Photographs Front View Note: All connectors are on the underside A Lockable Door Handles Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.3.4.2. Underside view showing RF connectors A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD Port A. Downlink VHF Input from VHF/UHF BDA Unit 80-301403 Port B. Downlink UHF Lowband Input from VHF/UHF BDA Unit 80-301403 Port C. Downlink UHF Midband Input from UHF BDA Unit 80-301404 Port D. Downlink UHF Highband Input from UHF BDA Unit 80-301404 Port E. Downlink 800MHz Input from 800MHz BDA Unit 80-301405 Port F. Uplink VHF Output to VHF/UHF BDA Unit 80-301403 Port G.
3.3.4.3.
3.3.5. Section 3.3.5.1. 3.3.5.2. 3.3.5.3. 3.3.5.4. 3.3.5.5. 3.3.5.6. 3.3.5.1.
02-010901 specification SPECIFICATION Passband Downlink Frequency Uplink Uplink Bandwidth Downlink Insertion Loss Power Rating Impedance VSWR Connectors Weight 3.3.5.3. PARAMETER 507.0 to 507.3MHz 510.0 to 510.3MHz 0.3 MHz 0.3 MHz 2.9 dB (typical) 50W 50ȍ Better than 1.2:1 SMA 3Kg (approximately) Crossband Splitter/Coupler 550/800MHz (07-004815) The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from different parts of the frequency spectrum.
07-005754 Specification Parameter Passband Frequencies Insertion loss Return loss Isolation between Bands Impedance Power rating operation Temperature range storage RF Connectors Weight 3.3.5.5. Low Pass Port High Pass Port 70 to 175 MHz 380 to 500 MHz <0.5dB <0.
3.3.5.6. 30dB Bi-Directional Coupler (07-022005) The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from transmission lines and to combine them, for example though splitter units for different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range. 07-022005 is a Bi-Directional device and as such will couple 30dB of signal whichever direction the signal is traveling.
3.4. VHF/UHF BDA Unit (80-301403) VHF/UHF BDA Unit (80-301403) provides the amplification stages for the VHF and UHF Lowband paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx). The Downlink VHF signal is received at the port labelled “VHF D/L INPUT” (Annotated A in the picture in section 3.4.4.2.). The Downlink VHF path passes through a bandpass filter to remove out of band noise and then a switched attenuator providing 0 to 30 dB of RF signal attenuation.
3.4.1. VHF/UHF BDA Unit (80-301403) System Diagram Drawing Number 80-301483 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.4.2. VHF/UHF BDA Unit (80-301403) Outline Drawing Drawing Number 80-301493 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.4.3. VHF/UHF BDA Unit(80-301403) Specification Parameter Specification Downlink VHF UHF Lowband VHF UHF Lowband VHF UHF Lowband VHF UHF Lowband VHF UHF Lowband VHF UHF Lowband 154.0 to 161.5MHz 460.4 to 460.5MHz 30dB 30dB 0 to 30dB in 2dB steps 0 to 30dB in 2dB steps > +34.0dBm > +42.5dBm 1dB below P1dB 1dB below P1dB > +45.0dBm > +53.
3.4.4. 3.4.4.1. VHF/UHF BDA Unit(80-301403) Photographs Front View Note: All connectors (RF, DC and Alarms) are on the underside A B C D E F Green LED “Power On” Red LED VHF Downlink Alarm Red LED VHF Uplink Alarm Red LED UHF Lowband Downlink Alarm Red LED UHF Lowband Uplink Alarm Lockable Door Handles Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.4.4.2.
3.4.4.3.
3.4.5. Section 3.4.5.1. 3.4.5.2. 3.4.5.3. 3.4.5.4. 3.4.5.5. 3.4.5.6. 3.4.5.7. 3.4.5.8. 3.4.5.9. 3.4.5.10. 3.4.5.11. 3.4.5.12. 3.4.5.13. 3.4.5.1. VHF/UHF BDA Unit(80-301403) Major Sub-components Component Part 01-002503 07-002908 10-000701 11-005401 12-016301 12-021601 12-021801 12-025602 17-001101 17-001105 17-001201 20-001602 80-008902 94-100004 96-200024 Component Part Description Qty Per Assembly 4 1 4 1 1 1 1 2 3 1 4 2 1 1 1 Bandpass Filter 30dB Directional Coupler Switched Attenuator 0.
3.4.5.2. 30dB Directional Coupler (07-002908) The purpose of these couplers is to tap off known portions of RF signal from transmission lines and to combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range. They are known as directional couplers as they couple power from the RF mainline in one direction only.
3.4.5.4. Low Noise Amplifier (11-005401) The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier. Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic range. The active devices are very moderately rated to provide a long trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier should be replaced.
3.4.5.5. TETRA Power Amplifier 20W (12-016301) This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
3.4.5.6. TETRA Power Amplifier 5W (12-021601) Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifier should require no maintenance over its operating life.
3.4.5.7. Low Power Amplifier (1Watt) (12-021801) The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three active devices are very moderately rated to provide a long trouble-free working life.
3.4.5.8. VHF Power Amplifier 5W (12-025602) Power amplifier 12-025602 is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime.
3.4.5.9. Automatic Gain Control 17-001101 17-001105 17-001201 AGC Detector Assembly AGC Detector Assembly (Logarithmic) AGC Attenuator Assembly VHF/UHF BDA UNIT(80-301403) is fitted with two differing types of Automatic Gain Control (AGC) system, one linear, and one logarithmic.
20-001602 Specification PARAMETER SPECIFICATION Operating voltage 8 to 30V (floating earth) Alarm Threshold Vcc - 1.20 volt +15% Alarm output relay contacts: Max. switch current 1.0Amp Max. switch volts 120Vdc/60VA Max. switch power 24W/60VA Min. switch load 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals Temperature operational -10°C to +60°C range storage -20°C to +70°C 3.4.5.11.
3.4.5.13. DC/DC Converter, 24V in, 12V 5A out (96-200024) This unit it is an O.E.M high power device with a 5 amp @ 12V (60Watts) output capability used to derive a 12V fixed voltage power supply rail from a 24V supply. In the event of failure this unit should not be repaired, only replaced.
3.5. UHF BDA Unit (80-301404) UHF BDA Unit (80-301404) provides the amplification stages for the UHF Midband and UHF Highband paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx). The Downlink UHF Midband signal is received at the port labelled “UHF MID D/L INPUT” (Annotated A in the picture in section 3.5.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal attenuation and then into the amplification stage.
3.5.1. UHF BDA Unit (80-301404) System Diagram Drawing Number 80-301484 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.5.2. UHF BDA Unit (80-301404) Outline Drawing Drawing Number 80-301494 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.5.3. UHF BDA Unit (80-301404) Specification Parameter Specification Downlink UHF Midband UHF Highband UHF Midband UHF Highband UHF Midband UHF Highband UHF Midband UHF Highband UHF Midband UHF Highband UHF Midband UHF Highband 482.5 to 483.8MHz 507.0 to 507.3MHz 30dB 30dB 0 to 30dB in 2dB steps 0 to 30dB in 2dB steps > +42.5dBm > +42.5dBm 1dB below P1dB 1dB below P1dB > +53.5dBm > +53.
3.5.4. 3.5.4.1. UHF BDA Unit (80-301404) Photographs Front View Note: All connectors (RF, DC and Alarms) are on the underside A B C D E F Red LED UHF Highband Downlink Alarm Red LED UHF Highband Uplink Alarm Red LED UHF Midband Downlink Alarm Red LED UHF Midband Uplink Alarm Green LED “Power On” Lockable Door Handles Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.5.4.2.
3.5.4.3.
3.5.5. Section 3.5.5.1. 3.5.5.2. 3.5.5.3. 3.5.5.4. 3.5.5.5. 3.5.5.6. 3.5.5.7. 3.5.5.8. 3.5.5.9. 3.5.5.10. 3.5.5.11. 3.5.5.1. UHF BDA Unit (80-301404) Major Sub-components Component Part 07-002908 10-000701 11-005401 12-016301 12-021601 12-021801 13-003011 17-001101 17-001105 17-001201 20-001602 80-008909 94-100004 Component Part Description 30dB Directional Coupler Switched Attenuator 0.
10-000701 Specification PARAMETER Attenuation Values Attenuation Steps Power Handling Attenuation Accuracy Frequency Range Impedance Connectors VSWR Weight Temperature operation range storage 3.5.5.3. SPECIFICATION 0-30dB 2, 4, 8 and 16dB 0.25 Watt ± 1.0 dB DC to 1GHz 50ȍ SMA 1.3:1 0.2kg -20°C to +60°C -40°C to +70°C Low Noise Amplifier (11-005401) The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier.
3.5.5.4. TETRA Power Amplifier 20W (12-016301) This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
3.5.5.5. TETRA Power Amplifier 5W (12-021601) Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifier should require no maintenance over its operating life.
3.5.5.6. Low Power Amplifier (12-021801) The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three active devices are very moderately rated to provide a long trouble-free working life. Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
3.5.5.7. DC/DC Converter, 24V in, 12V 8A out (13-003011) The DC/DC converter fitted is a high power PCB unit with an 8 amp at 12V output capability. The circuit is basically an O.E.M semiconductor regulator (one side of which has a heatsink mounting plate, usually bolted to the casing of the unit) and smoothing components built onto a printed circuit board with screw block terminations. In event of failure this unit should not be repaired, only replaced.
3.5.5.9. 24V Relay Dual Assembly (20-001602) The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
3.5.5.11. Dual Diode Assembly (94-100004) The purpose of these dual diode assemblies is to provide polarity protection for the DC supply input. They are very heavy-duty diodes and they prevent any reverse current from flowing back to their source. Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.6. 800MHz BDA UNIT (80-301405) 800MHz BDA UNIT (80-301405) provides the amplification stages for the 800MHz paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx). The Downlink 800MHz signal is received at the port labelled “D/L INPUT” (Annotated A in the picture in section 3.6.4.2.).
3.6.1. 800MHz BDA UNIT (80-301405) System Diagram Drawing Number 80-301485 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.6.2. 800MHz BDA UNIT (80-301405) Outline Drawing Drawing Number 80-301495 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
3.6.3. 800MHz BDA UNIT (80-301405) Specification Parameter Specification Downlink Downlink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point 856.0 to 861.0MHz 30dB 0 to 30dB in 2dB steps > +45.0dBm 1dB below P1dB > +55.
3.6.4. 3.6.4.1. 800MHz BDA UNIT (80-301405) Photographs Front View Note: All connectors (RF, DC and Alarms) are on the underside A B C D 3.6.4.2.
3.6.4.3.
3.6.5. section 3.6.5.1. 3.6.5.2. 3.6.5.3. 3.6.5.4. 3.6.5.5. 3.6.5.6. 3.6.5.7. 3.6.5.8. 3.6.5.9. 3.6.5.10. 3.6.5.11. 3.6.5.1. 800MHz BDA UNIT (80-301405) Major Sub-components Component Part 02-011601 05-002602 07-002907 10-000701 11-005902 12-018601 12-020501 17-001101 17-001105 17-001201 20-001602 94-100004 96-200024 Component Part Description Bandpass FIlter Splitter/Combiner 30dB Directional Coupler Switched Attenuator 0.
3.6.5.2. Splitter/Combiner (05-002602) The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or multiple ports, whilst maintaining an accurate 50: load to all inputs/outputs and ensuring that the VSWR and insertion losses are kept to a minimum. Any unused ports should be terminated with an appropriate 50: load. Being passive devices, the splitters should have an extremely long operational life and require no maintenance.
3.6.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) 10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the four miniature toggle switches on the top of each unit. Each switch is clearly marked with the attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and output.
LNA ‘D’ Connector Pin-out details Connector pin 1 2 3 4 5 6 7 8 9 3.6.5.6. Signal +Ve input (10-24V) GND Alarm relay O/P bad Alarm relay common Alarm relay good No connection TTL voltage set TTL alarm/0V (good) O/C good/0V bad 5W Power Amplifier (12-018601) This amplifier is a Class A 5W power amplifier from 800MHz to 960MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function.
3.6.5.7. 20W Power Amplifier (12-020501) This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
3.6.5.8. Automatic Gain Control 17-001101 17-001105 17-001201 AGC Detector Assembly AGC Detector Assembly (Logarithmic) AGC Attenuator Assembly 800MHz BDA UNIT (80-301405) is fitted with two differing types of Automatic Gain Control (AGC) system, one linear, and one logarithmic.
20-001602 Specification PARAMETER SPECIFICATION Operating voltage 8 to 30V (floating earth) Alarm Threshold Vcc - 1.20 volt +15% Alarm output relay contacts: Max. switch current 1.0Amp Max. switch volts 120Vdc/60VA Max. switch power 24W/60VA Min. switch load 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals Temperature operational -10°C to +60°C range storage -20°C to +70°C 3.6.5.10.
4. In-Line BDA Rack Mount 80-301406 The Rack Mount In Line BDA consists of ten, 19” equipment rack mount shelves The function is exactly the same as the Wall Mount unit in section 3 but the construction is different.
Downlink The downlink signal is received from the radiating cable and enters the Downlink Input Shelf 80301407 where by means of crossband splitter/couplers it is split into VHF, UHF and 800MHz paths, the UHF path is further split into Low, Middle and Highband paths. The VHF and UHF LowBand paths leave Downlink Input Shelf 80-301407. The VHF path goes to the Downlink Input of VHF Amplifier Shelf 80-301409 and the UHF Lowband path goes to the Downlink Input of UHF Lowband Amplifier Shelf 80-301410.
4.1. In-Line BDA Rack Mount System Diagrams 4.1.1. Overall System Diagram Drawing Number 80-301486 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.1.2. Combiners System Diagram Drawing Number 80-301487 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.2. In-Line BDA Rack Mount 80-301406 Specification ELECTRICAL SPECIFICATION Downlink VHF Uplink Downlink UHF Low Uplink Frequency Downlink UHF Mid Range Uplink Downlink UHF High Uplink Downlink 800MHz Uplink Passband Ripple VHF UHF Low Downlink Power UHF Mid Amplifier UHF High 800MHz VHF UHF Low Uplink Power UHF Mid Amplifier UHF High 800MHz Gain Gain Adjust Sampling Ports VSWR Impedance Power Supply Power Consumption Mechanical Specification 154.0 to 161.5 MHz 155.5 to 161.0 MHz 460.4 to 460.5 MHz 465.
4.3. In-Line BDA Rack Mount 80-301406 Illustrations 4.3.1. Rack 1 Front View A B C D E F G H I J K Downlink Input Shelf 80-301407 Uplink Input Shelf 80-301407 Uplink Output Shelf 80-301407 UHF Highband Amplifier Shelf 80-301410 UHF Midband Amplifier Shelf 80-301410 UHF Lowband Amplifier Shelf 80-301410 VHF Amplifier Shelf 80-301409 PSU Shelf PSU Modules 2U Blanking Panel 1U Blanking panel Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.3.2. Rack 1 Rear View A B C D E F G H I Downlink Input Shelf 80-301407 Uplink Input Shelf 80-301407 Uplink Output Shelf 80-301407 UHF Highband Amplifier Shelf 80-301410 UHF Midband Amplifier Shelf 80-301410 UHF Lowband Amplifier Shelf 80-301410 VHF Amplifier Shelf 80-301409 PSU Shelf Rack Interconnections Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.3.3. Rack 2 Front View A B C D Downlink Output Shelf 80-301408 800MHz Amplifier Shelf 80-301411 4U Blanking panel 1U Blanking panel Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.3.4. Rack 2 Rear View Top part of rack only A B C Downlink Output Shelf 80-301408 800MHz Amplifier Shelf 80-301411 Rack Interconnections Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.3.5. Rack 1 Top View A B C D E F G H I J K L M N U/L I/P “J” U/L I/P D/L I/P U/L O/P UHF HIGH D/P O/P UHF MID D/L O/P D/L I/P TEST PORT U/L I/P TEST PORT D/L I/P “A” U/L O/P TEST PORT U/L O/P “C” UHF LOW D/L O/P VHF D/L O/P CABLE GLAND FOR ELECTRICAL WIRING Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.3.6. Rack 2 Top View A B C D E F G H I J D/L O/P “D” D/L O/P “B” D/L I/P D/L O/P U/L I/P D/L O/P “C” U/L O/P D/L O/P TEST PORT D/L O/P “A” CABLE GLAND FOR ELECTRICAL WIRING Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.4. In-Line BDA Rack Mount 80-301401 List of Major Components Section 4.5. 4.6. 4.7. 4.8. 4.9. 4.10. 4.11. 4.12. 4.13. 4.
4.5. Downlink Input Shelf 80-301407 Downlink Input Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received from the radiating cable and are then split into their various separate paths before being amplified by external band specific amplifiers The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 1 Downlink signals are received at the port labelled “DOWNLINK INPUT” (Annotated A in the picture in section 4.5.4.1.
4.5.2. Downlink Input Shelf 80-301407 Outline Drawing Drawing Number 80-301497 Drawing also applies to Uplink Input Shelf 80-301407 and Uplink Output Shelf 80-301407 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.5.3. Downlink Input Shelf 80-301407 Specification PARAMETER SPECIFICATION Insertion Loss from Downlink Input port to port indicated VHF Band to port 1 < 1.0dB at 154.0 – 161.3MHz UHF Low Band to port 2 < 3.5dB at 460.4 – 460.5MHz UHF Mid Band to port 3 < 3.5dB at 482.5 -483.8MHz UHF High Band to port 4 < 4.0dB at 507.0 – 507.3MHz 800MHz Band to port 5 < 1.0dB at 856.0 – 861.0MHz Insertion Loss from port indicated to Downlink Input test port VHF Band 30dB at 154.0 – 161.3MHz UHF Low Band 30dB at 460.
4.5.5. Downlink Input Shelf 80-301407 Major Sub Components section 4.5.5.1. 4.5.5.2. 4.5.5.3. 4.5.5.4. 4.5.5.5. 4.5.5.1.
02-010901 specification SPECIFICATION Passband Downlink Frequency Bandwidth Downlink Insertion Loss Power Rating Impedance VSWR Connectors Weight 4.5.5.3. PARAMETER 507.0 to 507.3MHz 0.3 MHz 2.9 dB (typical) 50W 50ȍ Better than 1.2:1 SMA 3Kg (approximately) Crossband Splitter/Coupler 550/800MHz (07-004815) The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from different parts of the frequency spectrum.
07-005754 Specification Parameter Passband Frequencies Insertion loss Return loss Isolation between Bands Impedance Power rating operation Temperature range storage RF Connectors Weight 4.5.5.5. Low Pass Port High Pass Port 70 to 175 MHz 380 to 500 MHz <0.5dB <0.
4.6. Downlink Output Shelf 80-301408 Downlink Output Shelf 80-301408 is part of the main Splitter/Combiner assembly. Signals are received from the various amplification stages and then combined into a single signal which is output to the radiating cable. The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 2 Ports labelled A to D (Annotated A to D in section 4.6.4.1.) are the Downlink inputs from the amplification stages.
4.6.2. Downlink Output Shelf 80-301408 Outline Drawing Drawing Number 80-301498 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.6.3. Downlink Output Shelf 80-301408 Specification PARAMETER SPECIFICATION Insertion Loss from port indicated to Downlink Output VHF Band from port A < 1.0dB at 154.0 – 161.3MHz UHF Low Band from port B < 3.5dB at 460.4 – 460.5MHz UHF Mid Band from port C < 3.5dB at 482.5 -483.8MHz UHF High Band from port D < 4.0dB at 507.0 – 507.3MHz 800MHz Band from port E < 1.0dB at 856.0 – 861.0MHz Insertion Loss from port indicated to Downlink Output Test port VHF Band from port A 31.0dB at 154.0 – 161.
4.6.5. Section 4.5.5.1. 4.5.5.2. 4.5.5.3. 4.5.5.4. 4.5.5.1. Downlink Output Shelf 80-301408 Major Sub Components Component Part 02-010701 02-010901 07-004815 07-005754 07-018005 Component Part Description Bandpass Filter Bandpass Filter Crossband Splitter/Coupler 550/800MHz Crossband Splitter/Coupler VHF/UHF 30dB Directional Coupler Qty Per Assembly 2 1 1 1 1 These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.
4.7. Uplink Input Shelf 80-301407 Uplink Input Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received from the leaky feeder and are then split into their various separate paths before being amplified by external band specific amplifiers The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 1 Uplink signals are received at the port labelled “UPLINK INPUT” (Annotated A in the picture in section 4.7.4.1.
4.7.2. Uplink Input Shelf 80-301407 Outline Drawing Drawing Number 80-301497 – see section 4.5.2. 4.7.3. Uplink Input Shelf 80-301407 Specification PARAMETER SPECIFICATION Insertion Loss from from Uplink Input port to port indicated VHF Band to port F < 1.0dB at 155.7 – 160.8MHz UHF Low Band to port G < 3.5dB at 465.4 – 465.5MHz UHF Mid Band to port H < 3.5dB at 485.7 -486.8MHz UHF High Band to port I < 4.0dB at 510.0 – 510.3MHz 800MHz Band to port J < 1.0dB at 811.0 – 816.
4.7.5. section 4.5.5.1. 4.5.5.2. 4.5.5.3. 4.5.5.4. 4.5.5.5. Uplink Input Shelf 80-301407 Major Sub Components Component Part 02-010701 02-010901 07-004815 07-005754 07-022005 Component Part Description Bandpass Filter Bandpass Filter Crossband Splitter/Coupler 550/800MHz Crossband Splitter/Coupler VHF/UHF 30dB Bi-Directional Coupler Qty Per Assembly 2 1 1 1 1 These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
4.8. Uplink Output Shelf 80-301407 Uplink Output Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received from the various amplification stages and then combined into a single signal which is output to the leaky feeder. The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 1. Ports labelled 6 to 10 (Annotated A to E in section 4.8.4.1.) are the Uplink inputs from the amplification stages.
4.8.2. Uplink Output Shelf 80-301407 Outline Drawing Drawing Number 80-301497 – see section 4.5.2. 4.8.3. Uplink Output Shelf 80-301407 Specification PARAMETER SPECIFICATION Insertion Loss from port indicated to Uplink Output VHF Band from port 6 < 1.0dB at 155.7 – 160.8MHz UHF Low Band from port 7 < 3.5dB at 465.4 – 465.5MHz UHF Mid Band from port 8 < 3.5dB at 485.7 -486.8MHz UHF High Band from port 9 < 4.0dB at 510.0 – 510.3MHz 800MHz Band from port 10 < 1.0dB at 811.0 – 816.
4.8.5. section 4.5.5.1. 4.5.5.2. 4.5.5.3. 4.5.5.4. 4.5.5.5. Uplink Output Shelf 80-301407 Major Sub Components Component Part 02-010701 02-010901 07-004815 07-005754 07-022005 Component Part Description Bandpass Filter Bandpass Filter Crossband Splitter/Coupler 550/800MHz Crossband Splitter/Coupler VHF/UHF 30dB Bi-Directional Coupler Qty Per Assembly 2 1 1 1 1 These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
4.9. VHF Amplifier Shelf 80-301409 VHF Amplifier Shelf 80-301409 provides the amplification stages for the VHF paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1 The Downlink VHF signal is received at the port labelled “DOWNLINK I/P” (Annotated A in the picture in section 4.9.4.2.). The Downlink VHF path passes through a bandpass filter to remove out of band noise and then a switched attenuator providing 0 to 30 dB of RF signal attenuation.
4.9.1. VHF Amplifier Shelf 80-301409 System Diagram Drawing Number 80-301489 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.9.2. VHF Amplifier Shelf 80-301409 Outline Drawing Drawing Number 80-301499 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.9.3. VHF Amplifier Shelf 80-301409 Specification Parameter Specification Downlink Downlink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Uplink Uplink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Noise Figure Mechanical Specification Mechanical RF Connectors 154.0 to 161.5MHz 30dB 0 to 30dB in 2dB steps +34.0dBm 1dB below P1dB +45.0dBm 155.5 – 161.0MHz 30dB 0 to 30dB in 2dB steps +34.
4.9.4.2. Rear View I B ALARM DOWNLINK O/P UPLINK O/P DOWNLINK I/P UPLINK I/P FUSE T 3.15A C H A 24v DC I/P 0dB 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB 2dB UPLINK G A B C D E F G H I J 4.9.5. Section 4.9.5.1. 4.9.5.2. 4.9.5.3. 4.9.5.4. 4.9.5.5. 4.9.5.6.
4.9.5.1. Bandpass Filter (01-002503) The bandpass filters are multi-section designs with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of helical design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
4.9.5.3. VHF Power Amplifier 5W (12-025602) Power amplifier 12-025602 is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime.
4.9.5.4. Automatic Gain Control 17-001101 17-001201 AGC Detector Assembly AGC Attenuator Assembly VHF Amplifier Shelf 80-301409 is fitted with two Automatic Gain Control (AGC) systems, one for the Dwonlink amd one for the Uplink The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator.
4.9.5.5. 24V Relay Dual Assembly (20-001602) The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
4.10. UHF Lowband Amplifier Shelf 80-301410 UHF Lowband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Lowband paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1 The Downlink UHF Lowband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated A in section 4.10.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal attenuation and then into the amplification stage.
4.10.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram Drawing Number 80-301490 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.10.2. UHF Lowband Amplifier Shelf 80-301410 Outline Drawing Drawing Number 80-3014100 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.10.3. UHF Lowband Amplifier Shelf 80-301410 Specification Parameter Specification Downlink Downlink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Uplink Uplink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Noise Figure Mechanical Specification Mechanical RF Connectors 460.4 to 460.5MHz 30dB 0 to 30dB in 2dB steps +42.5dBm 1dB below P1dB +53.5dBm 465.4 – 465.
4.10.4.2. N.B. Rear View UPLINK DOWNLINK 465.4 - 465.5 MHz 460.4 - 460.5 MHz B I ALARM UHF DOWNLINK O/P UHF UPLINK O/P UHF DOWNLINK I/P UHF UPLINK I/P D FUSE T 10A C H UPLINK DOWNLINK 24v DC I/P 0dB 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB 2dB UPLINK G A B C D E F G H I J 0dB 0dB 0dB 4dB 8dB 16dB 465.4 - 465.5 MHz 460.4 - 460.
4.10.5.1. 30dB Directional Coupler (07-002908) The purpose of these couplers is to tap off known portions of RF signal from transmission lines and to combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range. They are known as directional couplers as they couple power from the RF mainline in one direction only.
4.10.5.3. Low Noise Amplifier (11-005401) The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier. Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic range. The active devices are very moderately rated to provide a long trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier should be replaced.
4.10.5.4. TETRA Power Amplifier 20W (12-016301) This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
4.10.5.5. TETRA Power Amplifier 5W (12-021601) Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifier should require no maintenance over its operating life.
3.10.5.6. Low Power Amplifier (1Watt) (12-021801) The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three active devices are very moderately rated to provide a long trouble-free working life.
4.10.5.7. Automatic Gain Control 17-001101 17-001105 17-001201 AGC Detector Assembly AGC Detector Assembly (Logarithmic) AGC Attenuator Assembly The three UHF Amplifier Shelves 80-301410 (Lowband, Midband and Highband) are each fitted with two differing types of Automatic Gain Control (AGC) system, one linear, and one logarithmic.
4.10.5.8. 24V Relay Dual Assembly (20-001602) The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
4.10.5.10. Dual Diode Assembly (94-100004) The purpose of these dual diode assemblies is to allow two DC voltage sources to be combined, so that the main DC rail within the equipment can be sourced from either a mains driven PSU, or externally through an XLR connector or from dual mains driven PSUs . They are very heavy-duty diodes and they prevent any reverse current from flowing back to their source or the alternative supply rail.
4.11. UHF Midband Amplifier Shelf 80-301410 UHF Midband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Midband paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1 The Downlink UHF Midband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated A in section 4.11.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal attenuation and then into the amplification stage.
4.11.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram Drawing Number 80-301490 see section 4.10.1. 4.11.2. UHF Midband Amplifier Shelf 80-301410 Outline Drawing Drawing Number 80-3014100 see section 4.10.2. 4.11.3.
4.11.4.2. N.B. Rear View UPLINK DOWNLINK I 485.7 - 486.8 MHz 482.5 - 483.8 MHz B ALARM UHF DOWNLINK O/P UHF UPLINK O/P UHF DOWNLINK I/P UHF UPLINK I/P FUSE T 10A C H UPLINK DOWNLINK 24v DC I/P 0dB 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB 2dB UPLINK G A B C D E F G H I J 0dB 0dB 0dB 4dB 8dB 16dB 485.7 - 486.8 MHz 482.5 - 483.
4.12. UHF Highband Amplifier Shelf 80-301410 UHF Highband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Highband paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1 The Downlink UHF Highband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated A in section 4.12.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal attenuation and then into the amplification stage.
4.12.1. UHF Highband Amplifier Shelf 80-301410 System Diagram Drawing Number 80-301490 see section 4.10.1. 4.12.2. UHF Highband Amplifier Shelf 80-301410 Outline Drawing Drawing Number 80-3014100 see section 4.10.2. 4.12.3.
4.12.4.2. N.B. Rear View UPLINK DOWNLINK I 510.0 - 510.3 MHz 507.0 - 507.3 MHz B ALARM UHF DOWNLINK O/P UHF UPLINK O/P UHF DOWNLINK I/P UHF UPLINK I/P FUSE T 10A C H UPLINK DOWNLINK 24v DC I/P 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB 2dB 4dB 8dB 16dB UPLINK G A B C D E F G H I J D 510.0 - 510.3 MHz 507.0 - 507.
4.13. 800MHz Amplifier Shelf 80-301411 800MHz Amplifier Shelf 80-301411 provides the amplification stages for the 800 MHz paths, The unit is housed in an 8U, 19” rack mount shelf which is mounted in Rack 2 The Downlink 800MHz signal is received at the port labelled “DOWNLINK INPUT” (Annotated A in the picture in section 4.13.4.2.).
4.13.1. 800MHz Amplifier Shelf 80-301411 System Diagram Drawing Number 80-301491 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.13.2. 800MHz Amplifier Shelf 80-301411 Outline Drawing Drawing Number 80-3014101 Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
4.13.3. 800MHz Amplifier Shelf 80-301411 Specification Parameter Specification Downlink Downlink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Uplink Uplink Passband Maximun gain Gain Adjustment 1dB Compression Point (P1dB) ALC setting 3rd Order Intercept point Noise Figure Mechanical Specification Mechanical RF Connectors 856.0 to 861.0MHz 30dB 0 – 30dB in 2dB steps +44.0dBm 1dB below P1dB +54.0dBm 811.0 to 816.
4.13.4.2.
4.13.5.1. Bandpass Filter (02-011601) The bandpass filters are multi-section designs with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
4.13.5.3. 30dB Directional Coupler (07-002907) The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from transmission lines nband to combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range. They are known as directional couplers as they couple power from the RF mainline in one direction only.
4.13.5.5. Low Noise Amplifier (11-005902) The Gallium-Arsenide low noise amplifier used in the unit is a double stage, solid-state low noise amplifier. Class A circuitry is used throughout the units to ensure excellent linearity and extremely low noise over a very wide dynamic range. The active devices are very moderately rated to provide a long trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should be replaced.
4.13.5.6. 5W Power Amplifier (12-018601) This amplifier is a Class A 5W power amplifier from 800MHz to 960MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
4.13.5.7. 20W Power Amplifier (12-020501) This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
4.13.5.8. Automatic Gain Control 17-001101 17-001105 17-001201 AGC Detector Assembly AGC Detector Assembly (Logarithmic) AGC Attenuator Assembly 800MHz Amplifier Shelf 80-301411 is fitted with two differing types of Automatic Gain Control (AGC) system, one linear, and one logarithmic.
4.13.5.9. 24V Relay Dual Assembly (20-001602) The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
4.14 PSU 96-300064 96-300064 is an O.E.M. PSU – there are two housed in a 2U rack mount assembly at the bottom of Rack 1. We does not recommend any invasive procedures for these O.E.M. power supplies. In case of failure, they are not to be repaired, only replaced.
5. INSTALLATION 5.1 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 Axell Wireless Ltd. should these figures be needed for future reference or diagnosis. 5.2 General Remarks The size and weight of the equipment racks mean that they represent a significant topple hazard unless they are bolted to the floor though the mounting holes in the base of the unit.
5.6 Commissioning Once all connections are made the equipment is ready for commissioning. To commission the system the test equipment detailed in Section 6.2 will be required. Using the system diagrams and the end-to-end test specification, the equipment should be tested to ensure correct operation. Typical RF levels that are not listed in the end-to-end specification, such as input levels to the fibre transmitters are detailed in the maintenance section of this manual.
6. MAINTENANCE 6.1 Fault Finding 6.1.1 Quick Fault Checklist All tunnel equipment is individually tested to specification prior to despatch. Failure of this type of equipment is not common. Experience has shown that a large number of fault conditions relating to tunnel installations result from simple causes often occurring as result of transportation, unpacking and installation.
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. The expected downlink output for the given input can be found in the end-to-end test specification. 6.1.4 Uplink Testing the uplink involves a similar procedure to the downlink except that the frequencies used are those transmitted by the mobile equipment. 6.1.
6.2 Tools & Test Equipment The minimum tools and test equipment needed to successfully service this Axell product are as followsSpectrum analyser 100kHz to 2GHz (Dynamic range = 90dB). Signal Generator 30MHz to 2GHz (-120dBm to 0dBm o/p level). Attenuator 20dB, 10W, DC-2GHz, (N male – N female). Test Antenna Yagi or dipole for operating frequency. Digital multi-meter Universal Volt-Ohm-Amp meter. Test cable x 2 N male – N male, 2M long RG214. Test cable x 2 SMA male – N male, 1m long RG223.
3) Carefully disconnect the RF input and output coaxial connectors (usually SMA) If alarm board removal is not required, go to step 5. 4) There is (usually) a plate attached to the alarm board which fixes it to the amplifier, remove its retaining screws and the alarm board can be withdrawn from the amplifier in its entirety.
Appendix A A.1. Glossary of Terms used in this document Cell Enhancer or Repeater Band Selective Repeater Channel Selective Repeater AC AGC BBU BTS CEMS C/NR DC Downlink (D/L) FO GND ID LED LNA LPA MOU M.S. MTBF N/A N/C OFR OIP3 P1dB PA RF RSA RX S/N TX Uplink (U/L) VSWR WDM A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals.
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A.3.
A.4. Amendment List Record Sheet Issue No. A Date 21/01/2008 Incorporated by AJS 1 13/06/2008 AJS Page Nos. Amended Reason for new issue Draft Issue Document Ref. 80-301401HBKM Axell Wireless Limited Technical Literature Document Number 80-301401HBKM L.A. M.T.A. Remote Sites Issue No.
APPENDIX B B.1. INITIAL EQUIPMENT SET-UP CALCULATIONS GENERAL INFORMATION Client Name Site Name Date AWL Equip. Model No. Model ANTENNA SYSTEMS Gain Azimuth Comments Type Loss Comments A - Service Antenna B – Donor Antenna Length C – Service Feeder D – Donor Feeder INITIAL PARAMETERS dBm dB dBm V E – CE Output Power F – Antenna Isolation G – Input signal level from donor BTS Operating Voltage Parameter Input signal level (G) CE max.
