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
I1
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
AA
50-1321105
PORT JA3
PORT JA2
700MHz 5CH CAVITY COMBINER OUTLINE DRAW IN G
PORT JA1
1:3
GD
18/10/2007
02/10/07
PB
PL
18/10/2007
PL
ORIGINAL ISSUE
AA
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
1
PORT JA3
2
3
PORT JA4
4
THIRD ANGLE PROJECTION
5
8x SLOTS SUITABLE FOR M6 FIXINGS
6
466.00
7
482.50
8
I1
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
A
2
AA
1
50-1321106
PORT JA2
Drawing No
2
700MHZ 4 CAVITY COMBINER OUTLINE DR AWING
Title
Customer
PORT JA1
3
England
Tel : 01494 777000
Fax : 01494 777002
Aerial Fa c i lities Limited
4
1:3
SCALE
5
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 PLACESG1mm
NO DECIM A L PLACEG 1mm
ONE DECIM A L PLACEG 0.3mm
TOLERANCES
GD
26/10/2007
16/10/07
Date
Approved
PB
PL
26/10/2007
Drawn
ALL DIMENSIONS ARE IN mm
UNLESS OTHE RWISE S TATED
6
Checked
BY
PL
DATE
15/10/07
REVISION
7
DESCRIPTION
ORIGINAL ISSUE
No
AA
8
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
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