4.3. In-Line BDA Rack Mount 80-301406 Illustrations
4.3.1. Rack 1 Front View
A Downlink Input Shelf 80-301407
B Uplink Input Shelf 80-301407
C Uplink Output Shelf 80-301407
D UHF Highband Amplifier Shelf 80-301410
E UHF Midband Amplifier Shelf 80-301410
F UHF Lowband Amplifier Shelf 80-301410
G VHF Amplifier Shelf 80-301409
H PSU Shelf
I PSU Modules
J 2U Blanking Panel
K 1U Blanking panel
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4.3.2. Rack 1 Rear View
A Downlink Input Shelf 80-301407
B Uplink Input Shelf 80-301407
C Uplink Output Shelf 80-301407
D UHF Highband Amplifier Shelf 80-301410
E UHF Midband Amplifier Shelf 80-301410
F UHF Lowband Amplifier Shelf 80-301410
G VHF Amplifier Shelf 80-301409
H PSU Shelf
I Rack Interconnections
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4.3.3. Rack 2 Front View
A Downlink Output Shelf 80-301408
B 800MHz Amplifier Shelf 80-301411
C 4U Blanking panel
D 1U Blanking panel
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4.3.4. Rack 2 Rear View
Top part of rack only
A Downlink Output Shelf 80-301408
B 800MHz Amplifier Shelf 80-301411
C Rack Interconnections
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4.3.5. Rack 1 Top View
A U/L I/P “J”
B U/L I/P
C D/L I/P
D U/L O/P
E UHF HIGH D/P O/P
F UHF MID D/L O/P
G D/L I/P TEST PORT
H U/L I/P TEST PORT
I D/L I/P “A”
J U/L O/P TEST PORT
K U/L O/P “C”
L UHF LOW D/L O/P
M VHF D/L O/P
N CABLE GLAND FOR ELECTRICAL WIRING
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4.3.6. Rack 2 Top View
A D/L O/P “D”
B D/L O/P “B”
CD/L I/P
DD/L O/P
E U/L I/P
F D/L O/P “C”
GU/L O/P
HD/L O/P TEST PORT
I D/L O/P “A”
J CABLE GLAND FOR ELECTRICAL WIRING
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 79 of 148
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4.4. In-Line BDA Rack Mount 80-301401 List of Major Components
Section Component
Part
4.5. 80-301407 Downlink Input Shelf 1
4.6. 80-301408 Downlink Output Shelf 1
4.7. 80-301407 Uplink Input Shelf 1
4.8. 80-301407 Uplink Output Shelf 1
4.9. 80-301409 VHF Amplifier Shelf 1
4.10. 80-301410 UHF Lowband Amplifier Shelf 1
4.11. 80-301410 UHF Midband Amplifier Shelf 1
4.12. 80-301410 UHF Highband Amplifier Shelf 1
4.13. 80-301411 800MHz Amplifier Shelf 1
4.14 96-300064 PSU 2
Component Part Description Qty Per
Assembly
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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.) and there is a 30dB test port labelled “DOWNLINK INPUT TEST PORT” (B in section
4.5.4.1.).
Ports labelled 1 to 5 (C to G in section 4.5.4.1.) are the Downlink outputs to the amplification stages.
Downlink Input Shelf 80-301407 also incorporates bandpass filtering for the three UHF bands, the
filters are placed in the RF path before the outputs to the external amplification stages
4.5.1. Downlink Input Shelf 80-301407 System Schematic
C
Downlink Input Shelf
80-301407
02-010701
460.4 to 450.5MHz
02-010701
07-005745
B
482.5 to 483.8MHz
02-010901
507.0 to 507.3MHz
A
07-022005
A Downlink Input from leaky Feeder
B Downlink Input Test Port (30dB Tap)
C Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409
D Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
E Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
F Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
G Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411
07-004815
D
E
F
G
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 81 of 148
A Downlink Input from Radiating Cable
B Downlink Input Test Port (30dB Tap)
C Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409
D Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
E Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
F Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
G Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411
H Earth Connection
DOWNLINK INPUT
TEST PORT
CDEFG
12345
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 83 of 148
4.5.5. Downlink Input Shelf 80-301407 Major Sub Components
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. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR
figure and 50ȍ load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require
no maintenance. Should a filter be suspect, it is usually most time efficient to replace the module
rather than attempt repair or re-tuning.
02-010701 Specification
PARAMETERSPECIFICATION
UHF Low Downlink460.4 to 460.5 MHz Passband
Frequency
Bandwidth
UHF Mid Downlink482.5 to 483.8 MHz
UHF Low0.1 MHz
UHF Mid1.3 MHz
Number of sections5
Insertion loss2.5 dB (typical)
VSWRbetter than 1.2:1
ConnectorsSMA
Power Handling100W max
operation-20°C to +60°C Temperature
range
storage-40°C to +70°C
Weight3 kg (typical)
4.5.5.2.Bandpass Filter 02-010901
Bandpass Filter 02-010901 is a multi-section design 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 & combline design respectively, and are
carefully aligned during manufacture in order to optimise the insertion loss, VSWR and
intermodulation characteristics of the unit. The body and tuned elements are silver-plated to reduce
surface ohmic losses and maintain a good VSWR figure and 50ȍ load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require
no maintenance.
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 84 of 148
The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from
different parts of the frequency spectrum.
It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a
common input/output. The couplers are housed in a machined aluminium casing having a centre
screening wall between the filter sections and lid secured by screws at frequent intervals over its
perimeter to obtain a tight seal and to ensure linearity and stability of response.
The purpose of Crossband Splitter/Coupler (07-005754) is to split or combine RF signals from
different parts of the frequency spectrum.
It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a
common input/output. The couplers are housed in a machined aluminium casing having a centre
screening wall between the filter sections and lid secured by screws at frequent intervals over its
perimeter to obtain a tight seal and to ensure linearity and stability of response.
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07-005754 Specification
ParameterLow Pass Port High Pass Port
Passband Frequencies70 to 175 MHz 380 to 500 MHz
Insertion loss<0.5dB <0.5dB
Return loss>14dB typical >14dB typical
Isolation between Bands>60dB >60dB
Impedance50 ohm
Power rating50W
Temperature
range
operation
storage
RF ConnectorsSMA (female)
Weight<1kg
-20C to +60C
-40C to +70C
4.5.5.5. 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.
07-022005 Specification
PARAMETERSPECIFICATION
Mainline Insertion Loss< 1.0 dB
Coupling Loss Tolerance+/-2.0 dB
Power Handling (CW)5W
Outline (W x D x H)44.5mm x 41mm x 27mm (ex. connectors)
Operating Temperature-20 to +55°C
Weather ProtectionIP54
Frequency Range100kHz – 2.7GHz
Coupling Loss30 dB
VSWR MainlineBetter than 1.4:1
Impedance50 ȍ
ConnectorsSMA (female) on all ports
Case MaterialAluminium
FinishIridite NCP
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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.
The Downlink signal leaves the Downlink Output Shelf 80-301408 for the radiating cable via the port
labelled “DOWNLINK OUTPUT” (F in section 4.6.4.1.) and there is a 30dB test port labelled
“DOWNLINK OUTPUT TEST PORT” (G in section 4.6.4.1.).
Downlink Output Shelf 80-301408 also incorporates bandpass filtering for the three UHF bands, the
filters are placed in the RF path before the outputs to the radiating cable.
4.6.1. Downlink Output Shelf 80-301408 System Schematic
A
Downlink Output Shelf
80-301408
02-010701
B
460.4 to 450.5MHz
02-010701
C
482.5 to 483.8MHz
02-010901
07-005745
D
507.0 to 507.3MHz
E
07-004815
A Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409
B Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
C Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
D Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
E Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411
F Downlink Output to Radiating Cable
G Downlink Output Test Port (30dB Tap)
07-018005
G
F
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 87 of 148
A Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409
B Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
C Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
D Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
E Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411
F Downlink Output to Radiating Cable
G Downlink Output Test Port (30dB Tap)
H Earth Connection
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 89 of 148
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4.6.5. Downlink Output Shelf 80-301408 Major Sub Components
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5 with the
exception of the 30dB Directional Coupler 07-018005 below
Component Part Description Qty Per
Assembly
4.6.5.1. 30dB Directional Coupler (07-018005)
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. 07-018005 is a Uni-Directional device and as such will only couple 30dB of
signal in one direction.
07-018005 Specification
PARAMETERSPECIFICATION
Frequency Range70 MHz - 1000MHz
Mainline Insertion Loss<0.5
Coupling Loss30 dB
VSWR MainlineBetter than 1.3:1
Impedance50 ȍ
Power Handling (CW)100W
Outline (W x D x H)176mm x 104mm x 24mm (ex. connectors)
ConnectorsN (female) on all ports
Case MaterialAluminium
FinishIridite NCP
Temperature
range
Weather ProtectionIP54
operation
storage
-20C to +60C
-40C to +70C
Axell Wireless Limited
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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.) and there is a 30dB test port labelled “UPLINK INPUT TEST PORT” (B in section 4.7.4.1.).
Ports labelled F to J (Annotated C to G in section 4.7.4.1.) are the Uplink Outputs to the amplification
stages
Uplink Input Shelf 80-301407 also incorporates bandpass filtering for the three UHF bands, the filters
are placed in the RF path before the outputs to the external amplification stages
4.7.1. Uplink Input Shelf 80-301407 System Schematic
C
Uplink Input Shelf
80-301407
02-010701
D
465.4 to 465.5MHz
02-010701
E
485.7 to 486.8MHz
02-010901
07-005745
F
510.0 to 510.3MHz
G
07-004815
A Uplink Input from Radiating Cable
B Uplink Input Test Port (30dB Tap)
C Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409
D Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
E Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
F Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
G Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411
07-022005
B
A
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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 – 816.0MHz
Insertion Loss from port indicated to Uplink Input test port
VHF Band31dB at 155.7 – 160.8MHz
UHF Low Band33dB at 465.4 – 465.5MHz
UHF Mid Band33dB at 485.7 – 486.8MHz
UHF High Band33dB at 510.0 – 510.3MHz
800MHz Band31dB at 811.0 – 816.0MHz
4.7.4. Uplink Input Shelf 80-301407 Illustrations
4.7.4.1. Rear View
CDEFG
FGHIJ
UPLINK INPUT
ABH
UPLINK INPUT
TEST PORT
A Uplink Input from Radiating Cable
B Uplink Input Test Port (30dB Tap)
C Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409
D Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
E Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
F Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
G Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411
H Earth Connection
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 92 of 148
4.7.5. Uplink Input Shelf 80-301407 Major Sub Components
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
Component Part Description Qty Per
Assembly
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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.
The Uplink signal leaves the Uplink Output Shelf 80-301407 for the leakey feeder via the port labelled
“UPLINK OUTPUT” (F in section 4.8.4.1.) and there is a 30dB test port labelled “UPLINK OUTPUT
TEST PORT” (G in section 4.8.4.1.).
4.8.1. Uplink Output Shelf 80-301407 System Schematic
A
Uplink Output Shelf
80-301407
02-010701
465.4 to 465.5MHz
02-010701
07-005745
G
485.7 to 486.8MHz
02-010901
510.0 to 510.3MHz
F
07-022005
A Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409
B Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
C Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
D Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
E Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411
F Uplink Output to Radiating Cable
G Uplink Output Test Port (30dB Tap)
07-004815
B
C
D
E
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 94 of 148
A Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409
B Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
C Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
D Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
E Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411
F Uplink Output to Radiating Cable
G Uplink Output Test Port (30dB Tap)
H Earth Connection
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4.8.5. Uplink Output Shelf 80-301407 Major Sub Components