20.3.2. 700MHz 5 Cavity Combiner System (50-132105) 700MHz 5 Cavity Combiner System (50-132105) consists of 5 Dielectric Cavity Resonators mounted on two 3U rack mount panels, three on one panel and two on the other 700MHz 5 Cavity Combiner System (50-132105) List of Major Components section 20.3.2.3.
Document Number 80-330501HBKM – Issue A - Draft 265.9 6U 265.9 6U 190.50 37.7 190.50 37.7 AA ORIGINAL ISSUE PL 18/10/2007 PB PL MATERIAL - FRONT PANEL & CHASSIS - ALUMINIUM FINISH - FRONT PANEL - IRIDITE FRONT PANEL - PAINTED RAL7035 (FRONT FACE & EDGES) CONNECTORS - `N' TYPE SOCKET PRODUCT NUMBER : 50-132105 466.00 482.
20.3.2.2.
20.3.2.3. Dielectric Cavity Resonator (04-003402) Cavity resonators are used in this system for their high Q factor response and power handling characteristics. Being finely tuned items, they can be prone to being de-tuned by mechanical shock or vibration therefore these units should be handled, stored and installed with care. Note that the cavities are coupled together using critical length harnesses. If any cable is to be changed the exact same length and type of cable should be used for replacement.
20.3.3. 700MHz 4 Cavity Combiner System (50-132106) 700MHz 4 Cavity Combiner System (50-132106) consists of 4 Dielectric Cavity Resonators mounted on two 3U rack mount panels, three on one panel and two on the other 700MHz 4 Cavity Combiner System (50-132106) List of Major Components Section 20.3.3.3.
Document Number 80-330501HBKM – Issue A - Draft A B C D E F 190.50 37.7 190.50 8 37.7 265.9 6U 265.9 6U 8 466.00 482.
20.3.3.2.
20.3.3.3. Dielectric Cavity Resonator (04-003402 Cavity resonators are used in this system for their high Q factor response and power handling characteristics. Being finely tuned items, they can be prone to being de-tuned by mechanical shock or vibration therefore these units should be handled, stored and installed with care. Note that the cavities are coupled together using critical length harnesses. If any cable is to be changed the exact same length and type of cable should be used for replacement.
21 CONVENTION PLACE STATION 700MHZ BDA (80-330554-2) Rack number CR1-CR-07 Convention Place Station 700MHz BDA (80-330554-2) List of Major Components Section 21.3.1. 21.3.2.
21.1.
21.2.
21.3. Convention Place Station 700MHz BDA (80-330554-2) Major Components 21.3.1. 700MHz Channelised Amplifier (50-132102) 3U rack mount shelf 700MHz Channelised Amplifier (50-132102) List of major Components Section 21.3.1.3. 21.3.1.4. 21.3.1.5. 21.3.1.6. 21.3.1.7. 21.3.1.8. 21.3.1.9. 21.3.1.10. 21.3.1.11. 21.3.1.12. 21.3.1.13.
21.3.1.1.
21.3.1.2.
21.3.1.3. Dummy load 09-000902 Dual Isolator (770MHz) (93-910048) has one of its ports terminated with Dummy load 09-000902 in order to achieve the correct power rating to absorb the reflected power levels that can be reasonably expected within the system. 09-000902 specification PARAMETER Frequency Range Power Rating VSWR Impedance Temperature Range RF Connectors Dimension Weight Finish RF Connector Environmental MTBF SPECIFICATION 0 - 2500 MHz 25 Watts continuous Better than 1.
21.3.1.5. Low Noise Amplifier (11-006702) The Gallium-Arsenide low noise amplifiers used in 800MHz Line Amplifier (55-165703) are double stage, solid-state low noise amplifiers. 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.
21.3.1.6 Power Amplifier (12-020804) This amplifier is a Class AB 40W power amplifier from 860MHz to 960MHz in balanced configuration. The amplifier demonstrates a very good input/output return loss (RL) and it has a built-in Current Fault Alarm Function. The unit 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.
21.3.1.7. DC/DC Converter (13-003412) DC/DC Converter 13-003412 13-003412 is based upon an O.E.M. DC/DC Converter module with a wide input range and and is used to derive a 12V fixed voltage power supply rail from a higher voltage supply, in this case 24V. In the event of failure this unit should not be repaired, only replaced. 13-003412 Specification PARAMETER Operating voltage Output voltages Output current Temperature operational range storage SPECIFICATION 18 – 75V DC 12V (typical) 5.
21.3.1.9. Channel Control Module (17-011501) The operating frequency for each channel in each repeater is programmed by 16 DIL (Dual In Line) switches. The programming switches are mounted in the Channel Control Module. The Channel Selectivity Modules are connected to the Channel Control Module via multi-way ribbon cables. Adjacent to the DIL switches for each channel is a toggle switch to turn on and off individual channels as required. A green LED indicates the power status of each channel.
Programming Example Frequency required: 454.000MHz Channel spacing: 12.5kHz Synthesiser offset: -21.4MHz The Local Oscillator frequency is therefore: 454.000 – 21.4 = 432.600MHz Dividing the Local Oscillator frequency by the channel spacing of 0.0125MHz: 432.600 = 34608 0.0125 This is an integer value, therefore it is OK to proceed. Local Oscillator Frequency 432.
.3.1.10. 24V Relay Board (80-008902) The General Purpose Relay Board allows the inversion of signals and the isolation of circuits. It is equipped with a single, dual pole, change-over relay RL1 with completely isolated wiring, accessed via screw terminals. The relay is provided with a polarity protection diode and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
21.3.1.12. 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.
21.3.2. 700MHz Uplink Amplifier/ Duplexer (50-132104) 3U 19” rack mount tray 700MHz Uplink Amplifier/ Duplexer (50-132104) List of Major Components Section 21.3.2.3. 21.3.2.4. 21.3.2.5. 21.3.2.6. 21.3.2.7. 21.3.2.8. 21.3.2.9. 21.3.2.10. 21.3.2.11. 21.3.2.12. 21.3.2.13. 21.3.2.14. 21.3.2.15.
21.3.2.1.
21.3.2.2.
21.3.2.3. Bandpass Filter (02-007206) 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 slot coupled, folded combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
21.3.2.5. Wideband Asymmetric Coupler (07-015105) The purpose of Wideband Asymmetric Coupler (07-015105) is to tap off a known portion (in this case 30dB) 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 50Ω load to all ports/interfaces throughout the specified frequency range.
21.3.2.7. Switched Attenuator 0.25W, 0 - 15dB (10-000901) In many practical applications for Cell Enhancers etc., the gain in each path is found to be excessive. Therefore, provision is made within the unit for the setting of attenuation in each path, to reduce the gain. 10-000901 provides attenuation from 0 - 15dB in 2 dB steps The attenuation is simply set using the four miniature toggle switches on the top of each unit.
Low Noise Amplifier (11-006702) ‘D’ Connector Pin-out details Connector pin 1 2 3 4 5 6 7 8 9 Signal +Ve input (10-24V) GND Alarm RelayO/P bad Alarm Relay common Alarm Relay good No connection TTL voltage set TTL alarm/0V (good) O/C good/0V bad 9-Way Pin-Out Graphical Representation 1 2 6 3 4 7 8 5 9 21.3.2.9. Low Power Amplifier (12-021901) The low power amplifier used is a triple stage solid-state low-noise amplifier.
Low Power Amplifier (12-021901) 7-Way Connector Pin-outs Connector Pin A1 (large pin) A2 (large pin) 1 2 3 4 5 Signal +24V DC GND Alarm relay common TTL alarm/0V good Alarm relay contact (bad) Alarm relay contact (good) O/C good/0V bad (TTL) 7-Way Connector Graphical Representation 1 A1 3 2 4 A2 5 21.3.2.10. DC/DC Converter 13-003412 13-003412 is based upon an O.E.M.
21.3.2.11. AGC System AGC Detector Unit (17-001109) AGC Attenuator Unit (17-001201) EQUIPMENT 700MHz Uplink Amplifier/ Duplexer (50-132104) is fitted with a wide dynamic range Automatic Gain Control (AGC) system. This is fitted in the Uplink path to avoid overloading the amplifiers (with the associated performance degradation) should a mobile be operated very close to the unit. The AFL wide dynamic range Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator.
21.3.2.12. Dummy Load (80-007401) When a combiner system is used to split or combine RF signals, in many cases it is most cost effective to use a standard stock item 4, 6 or 8 port device where, in fact, only a 3 or 6 port device is needed. In this case the Four Way Splitters (05-003302) each have their unused ports terminated with Dummy Load (80-007401) in order to preserve the correct impedance of the devices over the specified frequency range.
21.3.2.15. 12V Switch-Mode PSU (96-300052) No routine maintenance of the PSU is required. If a fault is suspected, then the output voltage from the power supply may be measured on its output terminals. This is typically set to 12.2V. The adjustment potentiometer will be found close to the DC output terminals. The line input voltage is sensed automatically, so no adjustment or link setting is needed by the operator.
22. INTERNATIONAL STATION 800MHZ BDA (80-330555-1) Rack number CR9-CR-07 International Station 800MHz BDA (80-330555-1) Section 22.3.1. 22.3.2.
22.1.
22.2.
22.3. International Station 800MHz BDA (80-330555-1) Major Components 22.3.1. 800MHz Output Quadplexer/Combiner (50-132203) 3U rack mount tray 800MHz Output Quadplexer/Combiner (50-132203) List of major Components Section 22.3.1.3. 22.3.1.4. 22.3.1.5. 22.3.1.6.
22.3.1.1.
22.3.1.2.
22.3.1.3. Bandpass Filter (02-007206) 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 slot coupled, folded combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
22.3.1.5. Wideband Asymmetric Coupler (07-015105) The purpose of Wideband Asymmetric Coupler (07-015105) is to tap off a known portion (in this case 30dB) 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 50Ω load to all ports/interfaces throughout the specified frequency range.
22.3.2. 800MHz 5 Cavity Combiner System (50-132205) 800MHz 5 Cavity Combiner System (50-132205) consists of 5 Dielectric Cavity Resonators mounted on two 3U rack mount panels, three on one panel and two on the other 800MHz 5 Cavity Combiner System (50-132205) List of Major Components Section 22.3.2.3.
Document Number 80-330501HBKM – Issue A - Draft 265.9 6U 265.9 6U 190.50 37.7 190.50 37.7 AA ORIGINAL ISSUE PL 26/10/2007 GD PL MATERIAL - FRONT PANEL & CHASSIS - ALUMINIUM FINISH - FRONT PANEL - IRIDITE FRONT PANEL - PAINTED RAL7035 (FRONT FACE & EDGES) CONNECTORS - `N' TYPE SOCKET PRODUCT NUMBER : 50-132205 466.00 482.50 26/10/2007 PB 02/10/07 8x SLOTS SUITABLE FOR M6 FIXINGS 1:3 50-1322105 800MHz 5CH CAVITY COMBINER OUTLINE DRAWING I1 AA Drawing number 50-1322105 22.3.2.1.
22.3.2.2.
22.3.2.2. Dielectric Cavity Resonator (04-003401) Cavity resonators are used in this system for their high Q factor response and power handling characteristics. Being finely tuned items, they can be prone to being de-tuned by mechanical shock or vibration therefore these units should be handled, stored and installed with care. Note that the cavities are coupled together using critical length harnesses. If any cable is to be changed the exact same length and type of cable should be used for replacement.
23. INTERNATIONAL STATION 800MHZ BDA Rack number CR9-CR-08 International Station 800MHz BDA (80-330555-2) List of Major Components Section 23.3.1. 23.3.2.
23.1.
23.
23.3. International Station 800MHz BDA (80-330555-2) Major Components 23.3.1. 800MHz Channelised Amplifier (50-132202) 3U rack mount chassis 800MHz Channelised Amplifier (50-132202) List of Major Components Section 23.3.1.3. 23.3.1.4. 23.3.1.5. 23.3.1.6. 23.3.1.7. 23.3.1.8. 23.3.1.9. 23.3.1.10. 23.3.1.11. 23.3.1.12. 23.3.1.13.
23.3.1.1.
