Axell Wireless 80 330558 User Manual

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24. INTERNATIONAL STATION 700MHZ BDA (80-330558-1)

Rack number C09-CR-09

International Station 700MHz BDA (80-330558-1) List of Major Components

Section Component

Part

24.3.1. 05-003007 4 Port Hybrid Coupler 1

24.3.2. 09-000401 Dummy Load 1

24.3.3. 50-132105 700MHz 5 Cavity Combiner System 1

24.3.4. 50-132106 700MHz 4 Cavity Combiner System 1

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 445 of 500

24.1. International Station 700MHz BDA (80-330558-1) Rack Drawing

Drawing number 80-330558

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 446 of 500

24.2. International Station 700MHz BDA (80-330558-1) System Diagram

Drawing number 80-330588-1

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 447 of 500

24.3. International Station 700MHz BDA (80-330558-1) Major Components

24.3.1. 4 Port Hybrid Coupler (05-003007)

This transmitter hybrid coupler is a device for accurately matching two or more RF signals to single or multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and ensuring that the insertion losses are kept to a minimum. Any unused ports should be terminated with an appropriate 50Ω load. In this specific instance one port of 4 Port Hybrid Coupler (05-003007) is terminated with Dummy load 09-000401 (see below).

05-003007 Specification

PARAMETER SPECIFICATION

Frequency range 700-900MHz

Bandwidth 200MHz

Rejection >14dB

Insertion loss 6.5dB (in band, typical)

Connectors SMA

Weight <1.0kg

operational -10%C to +60%C Temperature

range

storage -20%C to +70%C

24.3.2. Dummy Load (09-000401)

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 - 6 port device is needed. In this case the splitter/combiner module has one of its ports terminated (both uplink & downlink) with an appropriate load in order to preserve the correct impedance of the device over the specified frequency range. This has the advantage of allowing future expansion capability should extra channels or other functions become necessary.

09-000401 Specification

PARAMETER SPECIFICATION

Frequency Range 10 - 1000 MHz

Power Rating 60 watts continuous

VSWR Better than 1.1:1

Impedance 50 Ohms

Temperature Range -20 to +60°C

RF Connectors N Type female

Dimension 119mm x 51mm x 51mm

Weight 485grams

Finish Black Anodised MTBF >180,000 hours

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 448 of 500

24.3.3. 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 Component

Part

20.3.2.3. 04-003402 Dielectric Cavity Resonator 5

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 449 of 500

24.3.3.1. 700MHz 5 Cavity Combiner System (50-132105) Outline Drawing

Drawing number 50-1321105

PORT JA5

PORT JA4

8x SLOTS SUITABLE FOR M6 FIXINGS

482.5

466.00

190.50

390

374

CONNECTORS - `N' TYPE SOCKET

MATERIAL - FRONT PANEL & CHASSIS - ALUMINIUM

FINISH - FRONT PANEL - IRIDITE

FRONT PANEL - PAINTED RAL7035 (FRONT FACE & EDGES)

PRODUCT NUMBER : 50-132105

37.7

265.9 6U 265.9 6U

532.2 12U

37.7 190.50

50-1321105

PORT JA3

PORT JA2

700MHz 5CH CAVITY COMBINER OUTLINE DRAW IN G

PORT JA1

1:3

18/10/2007

02/10/07

18/10/2007

ORIGINAL ISSUE

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 450 of 500

24.3.3.2. 700MHz 5 Cavity Combiner System (50-132105) System Diagram

Drawing number 50-132185

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 451 of 500

24.3.3.3. 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.

04-003402 Specification

Specification Parameter

Frequency Range 764 to 776 MHz *

Bandwidth 25 kHz

Insertion Loss < 1.0 dB

Return Loss > 15 dB (at both ports)

Attenuation > 10 dB at Fc ± 1 MHz

Power Handling (CW) 20W

Environmental IP54

Size 124mm x 158mm x 157mm**

Weight 1.5 kg

Connectors N female

Temperature

range

operation

storage

-20°C to +60°C

-40°C to +70°C *Tuned to Customer’s specification

**Height is dependant upon position of tuning plunger

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 452 of 500

24.3.4. 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 Component

Part

20.3.3.3. 04-003402 Dielectric Cavity Resonator 4

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 453 of 500

24.3.4.1. 700MHz 4 Cavity Combiner System (50-132106) Outline Drawing

Drawing number 50-1321106

PORT JA3

PORT JA4

THIRD ANGLE PROJECTION

8x SLOTS SUITABLE FOR M6 FIXINGS

466.00

482.50

CONNEC T O RS - `N' TYPE SOCKE T

MATERIAL - FRON T PANEL & CHASSI S - ALUMINIUM

FINISH - FRON T PANEL - IRIDITE

FRON T PANEL - PAINTED RAL7035 (FRON T FAC E & E DG E S )

PRODUCT NUMBER : 50-132106

190.50

37.7

265.9 6U 265.9 6U

532.2 12U

37.7 190.50

50-1321106

PORT JA2

Drawing No

700MHZ 4 CAVITY COMBINER OUTLINE DR AWING

Title

Customer

PORT JA1

England

Tel : 01494 777000

Fax : 01494 777002

Aerial Fa c i lities Limited

1:3

SCALE

THIS IS A PROPRIE TARY DESIGN OF AERIAL FACILITIES LTD

REPRODUCTION OR USE OF THIS DESIGN B Y OTHER IS

PERMISSABLE ON LY IF EXPRESS LY AUTHORISED I N WRITING

BY AERIAL FACILITIES LTD

TWO DECIMA L PLACESG1mm

NO DECIM A L PLACEG 1mm

ONE DECIM A L PLACEG 0.3mm

TOLERANCES

26/10/2007

16/10/07

Date

Approved

26/10/2007

Drawn

ALL DIMENSIONS ARE IN mm

UNLESS OTHE RWISE S TATED

Checked

DATE

15/10/07

REVISION

DESCRIPTION

ORIGINAL ISSUE

F F

E E

D D

C C

B B

A A

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 454 of 500

24.3.4.2. 700MHz 4 Cavity Combiner System (50-132106) System Diagram

Drawing number 50-132186

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 455 of 500

24.3.4.3. 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.

04-003402 Specification

Specification Parameter

Frequency Range 764 to 776 MHz*

Bandwidth 25 kHz

Insertion Loss < 1.0 dB

Return Loss > 15 dB (at both ports)

Attenuation > 10 dB at Fc ± 1 MHz

Power Handling (CW) 20W

Environmental IP54

Size 124mm x 158mm x 157mm**

Weight 1.5 kg

Connectors N female

Temperature

range

operation

storage

-20°C to +60°C

-40°C to +70°C *Tuned to Customer’s specification

**Height is dependant upon position of tuning plunger

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 456 of 500

25. INTERNATIONAL STATION 700MHz BDA (80-330558-2)

Rack number C09-CR-10

International Station 700MHz BDA (80-330558-2) List of Major Components

Section Component

Part

25.3.1. 50-132102 700MHz Channelised Amplifier 9

25.3.2. 50-132107 700MHz Uplink Amplifier 1

25.3.3. 50-132108 700MHz Downlink Splitter 1

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 457 of 500

25.1. International Station 700MHz BDA (80-330558-2) Rack Drawing

Drawing number 80-330558

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 458 of 500

25.2. International Station 700MHz BDA (80-330558-2) System Diagram

Drawing number 80-330588-2

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 459 of 500

25.3. International Station 700MHz BDA (80-330558-2) Major Components

25.3.1. 700MHz Channelised Amplifier (50-132102)

3U rack mount shelf 700MHz Channelised Amplifier (50-132102) List of major Components

Section Component

Part

25.3.1.3. 09-000902 Dummy Load 1

25.3.1.4. 10-000901 Switched Attenuator 0.25W, 0 - 15dB 1

25.3.1.5. 11-006702 Low Noise Amplifier 1

25.3.1.6. 12-020804 Power Amplifier 1

25.3.1.7. 13-003412 DC/DC Converter 1

25.3.1.8. 17-009127 Channel Selectivity Module 1

25.3.1.9. 17-011501 Channel Control Module 1

25.3.1.10. 80-008902 24V Relay Board 1

25.3.1.11. 93-910048 Dual Isolator 1

25.3.1.12. 94-100004 Dual Diode Assembly 1

25.3.1.13. 96-300060 PSU 24V 1

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 460 of 500

25.3.1.1. 700MHz Channelised Amplifier (50-132102) Outline Drawing

Drawing number 50-1321102

POWER ON

ALARM

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 461 of 500

25.3.1.2. 700MHz Channelised Amplifier (50-132102) System diagram

Drawing number 50-132182

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 462 of 500

25.3.1.3. 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 SPECIFICATION

Frequency Range 0 - 2500 MHz

Power Rating 25 Watts continuous

VSWR Better than 1.1:1

Impedance 50 Ohms

Temperature Range -20 to +60°C

RF Connectors N Type female

Dimension 110.3mm x 38.1mm x

Weight 485 grams

Finish Black Anodised

RF Connector N Type male

Environmental IP66

MTBF >180,000 hours

25.3.1.4. 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. 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 50Ω impedance over their operating frequency at both input and output.

10-000901 Specification

PARAMETER SPECIFICATION

Attenuation Values 0-15dB

Attenuation Steps 1, 2, 4 and 8dB

Power Handling 0.25 Watt

Attenuation Accuracy ± 1.0 dB

Frequency Range DC to 1GHz

Impedance 50Ω

Connectors SMA

VSWR 1.3:1

Weight 0.2kg

operation -20°C to +60°C Temperature

range:

storage -40°C to +70°C

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 463 of 500

25.3.1.5. 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. There are no adjustments on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should be replaced. This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm that is easily integrated into the main alarm system.

11-006702 Specification

PARAMETER SPECIFICATION

Frequency range 800 – 1000MHz

Bandwidth <200MHz

Gain 29dB (typical)

1dB Compression point 20dBm

OIP3 33dBm

Input/Output return loss >18dB

Noise figure 1.3dB (typical)

Power consumption 180mA @ 24V DC

Supply voltage 10-24V DC

Connectors SMA female

operational -10°C to +60°C Temperature

range

Low Noise Amplifier (11-006702) ‘D’ Connector Pin-out details

Connector pin Signal

1 +Ve input (10-24V) 2 GND 3 Alarm RelayO/P bad 4 Alarm Relay common 5 Alarm Relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad

9-Way Pin-Out Graphical Representation

storage -20°C to +70°C

Size 90 x 55 x 30.2mm

Weight 290gms (approximately)

1 2 3 4 5

7 8 96

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 464 of 500

25.3.1.6 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.

12-020804 specification

Specification Parameter

Frequency Range 860 - 960MHz

Gain ≥28.0 dB

Gain Flatness 1.0dB p-p Max

2.5dB Max

Current

7-Way Connector Pin-outs

∆Gain vs. Temperature

Input RL 15dB Min

Output RL 15dB Min

Output Power @ P1dB 46.0dBm Min

DC Supply Voltage 24 ± 0.5Vdc

RF Input Power 25dBm

At P1dB 6000mA Max DC Supply

With no RF input (Iqc) 1700mA Max

operational -40°C to +70°C Temperature

range

Connector Pin Signal

A1 +24V DC A2 GND

1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)

storage -40°C to +100°C

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 465 of 500

25.3.1.7. 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 SPECIFICATION

Operating voltage 18 – 75V DC

Output voltages 12V (typical)

Output current 5.0A (Max)

operational -10%C to +60%C Temperature

range

storage -20%C to +70%C

25.3.1.8. Channel Selectivity Module (17-009127)

Channel Selectivity Module (17-009127) is employed when requirement dictates that very narrow bandwidths (single operating channels), must be selected from within the operating passband. One channel selectivity module is required for each channel.

The Channel Selectivity Module is an Up/Down frequency converter that mixes the incoming channel frequency with a synthesised local oscillator, so that it is down-converted to an Intermediate Frequency (IF) in the upper HF range. An eight pole crystal filter in the IF amplifier provides the required selectivity to define the operating passband of the Cell Enhancer to a single PMR channel. The same local oscillator then converts the selected IF signal back to the channel frequency.

Selectivity is obtained from a fixed bandwidth block filter operating at an intermediate frequency (IF) in the low VHF range. This filter may be internal to the channel selectivity module (Crystal or SAW filter) or an externally mounted bandpass filter, (LC or Helical Resonator). Various IF bandwidths can therefore be accommodated. A synthesized Local Oscillator is employed in conjunction with high performance frequency mixers, to translate between the signal frequency and IF.

The operating frequency of each channel selectivity module is set by the programming of channel selectivity module frequencies and is achieved digitally, via hard wired links, banks of DIP switches, or via an onboard RS232 control module, providing the ability to remotely set channel frequencies.

Automatic Level Control (ALC) is provided within each channel selectivity module such that the output level is held constant for high level input signals. This feature prevents saturation of the output mixer and of the associated amplifiers.

Alarms within the module inhibit the channel if the synthesised frequency is not locked. The synthesiser will not usually go out of lock unless a frequency far out of band is programmed.

The channel selectivity module is extremely complex and, with the exception of channel frequency programming within the design bandwidth, it cannot be adjusted or repaired without extensive laboratory facilities and the necessary specialised personnel. If a fault is suspected with any channel selectivity module it should be tested by substitution and the complete, suspect module should then be returned to AFL for investigation.

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 466 of 500

25.3.1.9. 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.

A red LED shows the alarm condition for each channel. An illuminated alarm LED indicates that the synthesiser has not achieved phase lock and that the module is disabled. There is a problem which requires investigation, often a frequency programmed outside the operating frequency range.

The following information is necessary before attempting the programming procedure.

7. operating frequency

8. synthesiser channel spacing (step size)

9. synthesiser offset (IF) Programming Procedure Check that the required frequency falls within the operational frequency limits of the Cell Enhancer. For each channel required, subtract the synthesiser offset from the required operating frequency and

record the resulting local oscillator frequency. Divide each local oscillator frequency by the channel spacing and check that the result is an integer

(i.e: no remainder). If the synthesiser division ratio is not an integer value, check the required operational frequency and

repeat the calculation checking for mistakes. Convert the required local oscillator frequency to synthesiser programming switch state patterns

according to the following table. Note: the frequency of the passband will dictate the switch steps used.

Switch Functions

Switch Number Synthesiser offset added when switch in UP position

12.5kHz step size 25kHz step size 1 +12.5kHz +25kHz 2 +25kHz +50kHz 3 +50kHz +100kHz 4 +100kHz +200kHz 5 +200kHz +400kHz 6 +400kHz +800kHz 7 +800kHz +1.6MHz 8 +1.6MHz +3.2MHz 9 +3.2MHz +6.4MHz

10 +6.4MHz +12.8MHz 11 +12.8MHz +25.6MHz 12 +25.6MHz +51.2MHz 13 +51.2MHz +102.4MHz 14 +102.4MHz +204.8MHz 15 +204.8MHz +409.6MHz 16 +409.6MHz +819.2MHz

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 467 of 500

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

0.0125 This is an integer value, therefore it is OK to proceed.

Local Oscillator

Frequency

432.600 MHz 1 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 Switch setting: 0 = switch DOWN (ON, frequency ignored )

1 = switch UP (OFF, frequency added )

17-011501 Controller Module DIP Switch Connector Data

IDC PIN 25-way

1 13 Freq. bit 1 (12.5kHz) Freq. bit 1 (25kHz) 2 25 Freq. bit 2 (25kHz) Freq. bit 2 (50kHz) 3 12 Freq. bit 3 (50kHz) Freq. bit 3 (100kHz) 4 24 Freq. bit 4 (100kHz) Freq. bit 4 (200kHz) 5 11 Freq. bit 5 (200kHz) Freq. bit 5 (400kHz) 6 23 Freq. bit 6 (400kHz) Freq. bit 6 (800kHz) 7 10 Freq. bit 7 (800kHz) Freq. bit 7 (1.6MHz) 8 22 Freq. bit 8 (1.6MHz) Freq. bit 8 (3.2MHz)

9 9 Freq. bit 9 (3.2MHz) Freq. bit 9 (6.4MHz) 10 21 Freq. bit 10 (6.4MHz) Freq. bit 10 (12.8MHz) 11 8 Freq. bit 11 (12.8MHz) Freq. bit 11 (25.6MHz) 12 20 Freq. bit 12 (25.6MHz) Freq. bit 12 (51.2MHz) 13 7 Freq. bit 13 (51.2MHz) Freq. bit 13 (102.4MHz) 14 19 Freq. bit 14 (102.4MHz) Freq. bit 14 (204.8MHz) 15 6 Freq. bit 15 (204.8MHz) Freq. bit 15 (409.6MHz) 16 18 Freq. bit 16 (409.6MHz) Freq. bit 16 (819.2MHz) 17 5 Module alarm Module alarm 18 17 Gain bit 1 Gain bit 1 19 4 Gain bit 2 Gain bit 2 20 16 Gain bit 3 Gain bit 3 21 3 Gain bit 4 Gain bit 4 22 15 (5V (5V 23 2 0V 0V 24 14 Switched 12V Switched 12V 25 1 0V 0V 26 --- --- ---

= 34608

Switch settings

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

17-011501 Controller Module DIP Switch Connector Data

Connector

Function

(12.5kHz steps)

Function

(25kHz steps)

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 468 of 500

25.3.1.10. 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. It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.

80-008902 Technical Specification

Parameter Specification 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 15-way 0.1" pitch

operational -10°C to +55°C Temperature

range

storage -40°C to +70°C

25.3.1.11. Dual Isolator (770MHz) (93-910048)

The purpose of fitting an isolator to the output of a transmitter in a multi-transmitter environment is so that each output is afforded a degree of isolation from every other. Without the addition of Isolators, simultaneous transmissions could interfere to create intermodulation products and spurious transmissions would be created which would cause interference.

Dual Isolator (93-910048) is a ferro-magnetic RF device, which has directional properties. In the forward direction, RF arriving at the input is passed to the output with minimal attenuation. In the reverse direction, RF arriving at the output due to reflected power from a badly matched load, or due to coupling with another transmitter, is routed into an RF load where it is absorbed. The isolator therefore functions to prevent reflected RF energy reaching the output port of an amplifier where it could cause intermodulation products or premature device failure.

Dual Isolator (93-910048) is as its name suggests a two stage device, essentially two isolators in one casing. One isolator stage has an internal 10W load fitted, the second stage needs an external load fitted of sufficient rating to absorb the reflected power levels that can be reasonably expected within the system. In this instance Dual Isolator (93-910048) is fitted with external load 09-000902.

93-910048 Specification

Parameter Specification

Frequency Range 760-780 MHz

Insertion Loss 0.4 dB max.

Isolation 50 dB min.

Return Loss 23 dB min.

Power Handling 10W (internally fitted load)

RF Connectors N female

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 469 of 500

25.3.1.12. 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. Combining diodes such as these will also be used if the equipment is to be powered from external back-up batteries.

25.3.1.13. PSU 24V (96-300060)

The power supply unit is a switched-mode type capable of supplying 24V DC at 6.25Amps continuously. Equipment of this type typically requires approximately 2-2.5Amps at 24V DC, so the PSU will be used conservatively ensuring a long operational lifetime.

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 24.5V. The output voltage may be varied using a multi-turn adjustment potentiometer mounted close to the DC output terminals.

The line input voltage is sensed automatically, so no adjustment or link setting is needed by the operator.

96-300060 Specification

AC Input Supply

110 or 220V nominal

Voltage

Frequency 47 to 63Hz

DC Output Supply:

Voltage

Current 6.25A

90 to 132 or 180 to 264V (absolute limits)

24V DC (nominal) 22 to 26V (absolute limits)

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 470 of 500

25.3.2. 700MHz Uplink Amplifier (50-132107)

2U rack mount tray

700MHz Uplink Amplifier (50-132107) List of major Components

Section Component

Part

25.3.2.3. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 1

25.3.2.4. 11-006702 Low Noise Amplifier 1

25.3.2.5. 12-021901 Low Power Amplifier 1

25.3.2.6. 13-003412 DC/DC Converter 1 17-001109 AGC Detector Assembly (Logarithmic) 1 25.3.2.7. 17-001201 AGC Detector Assembly 1

25.3.2.8. 80-008901 12V (Single) Relay Board 1

25.3.2.9. 94-100004 Dual Diode Assembly 1

25.3.2.10. 96-300052 12V Switch-Mode PSU 1

Component Part Description Qty Per

Assembly

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 471 of 500

25.3.2.1. 700MHz Uplink Amplifier (50-132107) Outline Drawing

Drawing number 50-1321107

POWER ON

ALARM

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 472 of 500

25.3.2.2. 700MHz Uplink Amplifier (50-132107) System Diagram

Drawing number 50-132187

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 473 of 500

25.3.2.3. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)

Switched Attenuator 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 50Ω impedance over their operating frequency at both input and output.

10-000701 Specification

PARAMETER SPECIFICATION

Attenuation Values 0-30dB

Attenuation Steps 2, 4, 8 and 16dB

Power Handling 0.25 Watt

Attenuation Accuracy ± 1.0 dB

Frequency Range DC to 1GHz

Impedance 50Ω

Connectors SMA

VSWR 1.3:1

Weight 0.2kg

operation -20°C to +60°C Temperature

range

storage -40°C to +70°C

25.3.2.4. Low Noise Amplifier (11-006702)

The Gallium-Arsenide low noise amplifiers used in 700MHz Line Amplifier (55-165704) 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. There are no adjustments on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should be replaced. This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm that is easily integrated into the main alarm system.

11-006702 Specification

PARAMETER SPECIFICATION

Frequency range 800 - 1000MHz

Bandwidth <200MHz

Gain 29dB (typical)

1dB Compression point 20dBm

OIP3 33dBm

Input/Output return loss >18dB

Noise figure 1.3dB (typical)

Power consumption 180mA @ 24V DC

Supply voltage 10-24V DC

Connectors SMA female

operational -10°C to +60°C Temperature

range

storage -20°C to +70°C

Size 90 x 55 x 30.2mm

Weight 290gms (approximately)

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 474 of 500

Low Noise Amplifier (11-006702) ‘D’ Connector Pin-out details

Connector pin Signal

1 +Ve input (10-24V) 2 GND 3 Alarm RelayO/P bad 4 Alarm Relay common 5 Alarm Relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad

9-Way Pin-Out Graphical Representation

1 2 3 4 5

7 8 96

25.3.2.5. Low Power Amplifier (12-021901)

The low power amplifier used is a triple stage solid-state low-noise 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. There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier should be replaced.

Low Power Amplifier (12-021901) Specification

PARAMETER SPECIFICATION

Frequency range 800-960MHz*

Bandwidth 20MHz *

Maximum RF output >1.0 Watt

Gain 15dB

1dB compression point +30.5dBm

3rd order intercept point +43dBm

Noise Figure <6dB

VSWR better than 1.5:1

Connectors SMA female

Supply 500mA @ 10-15V DC

Temperature

range

operational

storage

Weight 0.5 kg

Size 167x52x25mm

-10°C to +60°C

-20°C to +70°C

* Tuned to Customer’s specification

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 475 of 500

Low Power Amplifier (12-021901) 7-Way Connector Pin-outs

Connector Pin Signal

A1 (large pin) +24V DC A2 (large pin) GND

1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)

25.3.2.6. DC/DC Converter 13-003412

13-003412 Specification

PARAMETER SPECIFICATION

Operating voltage 18 – 75V DC

Output voltages 12V (typical)

Output current 5.0A (Max)

operational -10%C to +60%C Temperature

range

storage -20%C to +70%C

25.3.2.7. AGC System

AGC Detector Unit (17-001109) AGC Attenuator Unit (17-001201)

Equipment 700MHz Uplink Amplifier (50-132107) 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. The logarithmic detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the attenuator is situated in the RF path between the 1st and 2nd stages of amplification.

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 476 of 500

Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level being delivered by the power amplifier, and when a certain threshold is reached it begins to increase the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading of the power amplifier is avoided.

The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as system degradation will occur.

The detector comprises of a 50Ω transmission line with a resistive tap which samples a small portion of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode rectifier, the output of which is a DC voltage proportional to the RF input signal.

This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output, which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at some earlier point in the RF circuit.

For small signals, below AGC onset, the output control line will be close to 12V and the AGC attenuator will have minimum attenuation. As the signal level increases the control line voltage will fall, increasing the attenuator value and keeping the system output level at a constant value. The AGC onset level is adjusted by the choice of sampler resistor R1 and by the setting of potentiometer VR1, (factory set at the time of system test) do not adjust unless able to monitor subsequent RF levels. The attenuator comprises a 50Ω P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB. The attenuation is controlled by a DC voltage which is derived from the associated AGC detector unit.

Wide Dynamic Range AGC Specification

PARAMETER SPECIFICATION

Frequency Range up to 1000MHz

Attenuation Range 3 to 30dB

Attenuation Steps continuously variable

VSWR better than 1.2:1

RF Connectors SMA female

attenuator 1W Power

Handling

Range

Size

Weight

detector/amp >30W (or as required)

operation -10°C to +60°C Temperature

storage -20°C to +70°C

attenuator pcb 50 x 42 x 21mm

detector/amp pcb 54 x 42 x 21mm

attenuator 90gm

detector/amp 100gm

25.3.2.8. 12V (Single) Relay Board (80-008901)

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 a 15 way in-line connector.

The relay is 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. It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 477 of 500

80-008901 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

operational -10°C to +60°C Temperature

range

storage -20°C to +70°C

25.3.2.9. Dual Diode Assembly (94-100004)

25.3.2.10. 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.

All the PSUs used in AFL Cell Enhancers are capable of operation from either 110 or 220V nominal AC supplies. The line voltage is sensed automatically, so no adjustment or link setting is needed by the operator.

96-300052 Specification

AC Input Supply

110 or 220V nominal

Voltage

Frequency 47 to 63Hz

DC Output Supply

Voltage Current 12.5A

85 - 265V AC (absolute limits)

12V DC (nominal)

10.5-13.8V (absolute limits)

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 478 of 500

25.3.3. 700MHz Downlink Splitter (50-132108)

2U rack mount tray

700MHz Downlink Splitter (50-132108) List of Major Components

Section Component

Part

25.3.3.3. 05-003302 Four Way Splitter/Combiner 5

25.3.3.4. 10-000901 Switched Attenuator 0.25W, 0 - 15dB 1

25.3.3.5. 80-007401 Dummy Load 7

Component Part Description Qty Per

Assembly

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25.3.3.1. 700MHz Downlink Splitter (50-132108) Outline Drawing

Drawing number 50-1321108

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 480 of 500

25.3.3.2. 700MHz Downlink Splitter (50-132108) System Diagram

Drawing number 50-132188

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 481 of 500

25.3.3.3. Four Way Splitter/Combiner (05-003302)

The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or multiple ports, whilst maintaining an accurate 50Ω 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 50Ω load.

Four Way Splitter (05-003302) Specification

PARAMETER SPECIFICATION

Frequency range: 700-980MHz

Bandwidth: 180MHz

Rejection: >14dB

Insertion loss: <7.0dB (in band)

Connectors: N type, female

Weight: <1.5kg

Temperature

range:

operational:-20%C to +60%C

storage -40%C to +70%C

25.3.3.4. Switched Attenuator 0.25W, 0 - 15dB (10-000901)

10-000901 Specification

PARAMETER SPECIFICATION

Attenuation Values 0-15dB

Attenuation Steps 1, 2, 4 and 8dB

Power Handling 0.25 Watt

Attenuation Accuracy ± 1.0 dB

Frequency Range DC to 1GHz

Impedance 50Ω

Connectors SMA

VSWR 1.3:1

Weigh 0.2kg

operation -20°C to +60°C Temperature

range

storage -40°C to +70°C

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 482 of 500

25.3.3.5. 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 seven of the outputs from the Four Way Splitter/Combiner (05-003302) have their ports terminated with Dummy Load (80-007401) in order to preserve the correct impedance of the devices over the specified frequency range. This also has the advantage of allowing future expansion capability should extra channels or other functions become necessary.

Dummy Load (80-007401) Specification

Parameter Specification

Frequency Range 0 to 1000MHz

Power Rating 1.6 Watts

0-500MHz 1.2:1 VSWR

(Max)

500-1000MHz 1.3:1

Temperature -20 to +55°C

Connector ‘N’ type Male

Nominal Impedance 50 Ohms

STTRS DOCUMENTATION Document Number 80-330501HBKM – Issue A - Draft Page 483 of 500

Axell Wireless 80 330558 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual