Axell Wireless 80 330555 User Manual

22. INTERNATIONAL STATION 800MHZ BDA (80-330555-1)

Rack number CR9-CR-07

International Station 800MHz BDA (80-330555-1)

Section Component

Part

22.3.1. 50-132203 800MHz Output Quadplexer/Combiner 1

22.3.2. 50-132205 800MHz 5 Cavity Combiner System 2

Component Part Description Qty Per

Assembly

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22.1. International Station 800MHz BDA (80-330555-1) Rack elevation

Drawing number 80-330555

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22.2. International Station 800MHz BDA (80-330555-1) System diagram

Drawing number 80-330585-1

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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 Component

Part

22.3.1.3. 02-007206 Bandpass Filter 4

22.3.1.4. 05-003007 4 Port Hybrid Coupler 1

22.3.1.5. 07-015105 Wideband Asymmetric Coupler 1

22.3.1.6. 09-000902 Dummy load 1

Component Part Description Qty Per

Assembly

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22.3.1.1. 800MHz Output Quadplexer/Combiner (50-132203) Outline Drawing

Drawing number 50-1322103

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22.3.1.2. 800MHz Output Quadplexer/Combiner (50-132203) System Diagram

Drawing number 50-132283

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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. The tuned elements are silver-plated to reduce surface
ohmic losses and maintain a good VSWR figure and 50Ω 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.

No adjustments should be attempted without full network sweep analysis facilities to monitor both
insertion loss and VSWR simultaneously.

02-007206 Specification

PARAMETER SPECIFICATION

Response type Chebyshev

Frequency range 800 - 950MHz *

Bandwidth 25MHz *

Number of sections 8

Insertion loss 1.2 dB

VSWR better than 1.2:1

Connectors SMA female

Power handling 100W max

operation -20°C to +60°C Temperature

range

storage -40°C to +70°C

Weight 3 kg (typical)

*tuned to Customer's specification

22.3.1.4. 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 09-000902 (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

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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. They are known formally as directional
couplers as they couple power from the RF mainline in one direction only.

07-015105 Specification

PARAMETER SPECIFICATION

Construction Inductive air gap

Frequency 800-2500MHz

Through loss 0.4dB (typical)

Coupling level -30dB ±0.5dB

Isolation N/A

Weight <1.0kg

Connectors SMA, female

Temperature

range

operation

storage

-20°C to +60°C

-40°C to +70°C

22.3.1.6. Dummy load 09-000902

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 4 Port Hybrid Coupler (05-003007) has one of its ports terminated with an
appropriate Dummy Load in order to preserve the correct impedance of the device over the specified
frequency range.

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

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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 Component

Part

22.3.2.3. 04-003401 Dielectric Cavity Resonator 5

Component Part Description Qty Per

Assembly

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22.3.2.1. 800MHz 5 Cavity Combiner System (50-132205) Outline Drawing

Drawing number 50-1322105

8x SLOTS SUITABLE FOR M6 FIXINGS

466.00

482.50

I1

CONNECTORS - `N' TYPE SOCKET

MATERIAL - FRONT PANEL & CHASSIS - ALUMINIUM

FINISH - FRONT PANEL - IRIDITE

FRONT PANEL - PAINTED RAL7035 (FRONT FACE & EDGES)

PRODUCT NUMBER : 50-132205

37.7 190.50

265.9 6U 265.9 6U

532.2 12U

37.7 190.50

AA

50-1322105

800MHz 5CH CAVITY COMBINER OUTLINE DRAWING

1:3

PB

26/10/2007

02/10/07

GD

PL

26/10/2007

PL

ORIGINAL ISSUE

AA

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22.3.2.2. 800MHz 5 Cavity Combiner System (50-132205) System Diagram

Drawing number 50-132285

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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.

04-003401 Specification

Specification Parameter

Frequency Range 800 - 950MHz *

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

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