basic mw info pdh

8/11/2019 Basic MW Info PDH

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Installation & Commissioning

Siemens Mobile Communications

OP MW MS EPC

SRA L XD

Basic MW System Overview


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PCM Multiplex


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PCM Multiplator


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PCM Code


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Base Band Process


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Modulation


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f0

fb = Bit Rate

f0 = Central Frequency

Frequency

Power

Spectrum Analisys


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RF Up Converter


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MW System Block Diagram


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MW Network

T = Terminal Station

R = Repeater Station

TT

T

T

R

RR

High

Capacity

SDH

PDH

Medium

Capacity

SDH

PDH

Low

Capacity PDH

SDH hierarchy

STM 1

STM-4


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Main Outdoor Elements

Shelter H Support

Tower

Antenna Support

Antenna


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Outdoor Elements (Installation Material)

Branching Connection

Pressure Windows

Waveguide Connector

Wall/Roof Feed-Thru or Plate/Boot Grounding Kit

Dehydrator

Support Angle

Support Kit

Cable / Waveguide

Cable / Waveguide Bridge


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Grounding Kit

Wave guide Support

Optional Flex WG

Support and Pipe/Pole

Antenna Mount

Waveguide Connector

Hanger / Clamps

Wind Bracket

Outdoor Elements (Installation Material)


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Safety Devices


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Flange Identification


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Flange Example


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Rack

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Main Indoor Elements

Support Structure

Power Distribution Box

DDF

(Digital Distribution Frame)

Mux and Aux equipments

Standard MW equipment

Branching Connection


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VDF

Rack 1Mpx

Rack 1

DDF

Rack 1

DDF

Rack 2

ADM

Rack 2 DDFRack 2

MW

Rack 3

VDF

Rack 2

PDB PDB

- 48 V

Digital Signal

Service / LF Signal

Interconnections

Main Indoor Connections Diagram


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Parabolic Antenna

Standard Reflector Horn Reflector Cassegrain Reflector


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HP Antenna (Integrated System)


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Standard Antenna


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Antenna Assembly Sequence


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Feed Mounting


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Feed Assembly


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Polarization

H Polarization

V Polarization


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Polarization

Polarization

Adjustment


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Antenna Irradiation Lobe

Main Lobe

Secondary Lobe


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Antenna Radiation Pattern


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Introduction MW Propagation

Dist. (d) (Km)

A B

1 ray Fresnel

Antenna Diamter D (mt)

Antenna Gain = 20 Log (freq.) + 20 Log (diam.) + 10 Log (K) + 20,4

FSL = 20 Log (freq.) + 20 Log (dist.) + 92,46

Prx A= Ptx B Branching Loss (Tx) B Feeder Loss B + Antenna Gain B FSL

+ Antenna Gain A Feeder Loss A - Branching Loss A

Distance - Km

Diameter - Meter

Ptx - Dbm

Frequency - Ghz

Loss - dB

Gain - dB

Prx - dBm

K - Variable between

0,45 and 0,55

(antenna type)


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Antenna Gain and FSL Diagram


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Fresnel Radius and Rain Attenuation


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Interference and Reflection


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Power Table Conversion

basic mw info pdh

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