Data Communications & HFC

This training is only available upon request

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10%

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Bring your friends

10%

Starting from 3
enrolments

15%

Starting from 5
enrolments

20%

Starting from 10
enrolments

The Hybrid-Fibre-Coax (HFC) architecture has been adapted by many cable operators for internet, telephony and multimedia services. Understanding the performance of the individual components in an HFC network is important to estimate their impact on the communication signals in the return path (from customer to headend).

The course introduces the architecture and the basic components of the return path of an HFC network. Beside this, the attendee will get insight in modulations, multiple access techniques, analogue to digital, the different sources of interference, their influence on the communication signals, and some appropriate mitigation techniques. The audience is typical people starting in cable (engineering, network operations, management, …)

•Understand the architecture of an HFC network

•Knowledge of the performance of basic components in the return path of an HFC network

•Understanding of sources of interference and of techniques to reduce interference

Prerequisites: Some experience with RF, basic electronics knowledge

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Course syllabus

Overview of All Specifications and Technology Areas

Comprehensive overview of DOCSIS specifications and technology areas

Introduction

What is an HFC network?

Signals

Downstream and upstream · Voltage, power, and frequencies · Analogue and digital modulation (focus on QAM), power, and spectral efficiency

HFC Network Architecture

HFC and backbone · Optical nodes · Coaxial distribution plant · Multiple access techniques

Components

Passive: coaxial cable, splitter, tap, diplex filter, optical fibre · Active: amplifier, NTU, laser, photodetector, optical node

Noise

Internal interference: intermodulation, thermal noise, group delay, amplitude flatness, micro-reflections, HUM modulation, fibre-optic noise · External interference: ingress, impulse noise, entry points · Impact on BER and SNR

Return Path Noise Mitigation

Hardware techniques: optimal network installation, upstream component filtering, attenuation equalization, improved home network · Software techniques: frequency hopping, robust modulation, FEC, interleaving

Let's advance
networks together

We would welcome the opportunity to work with you to optimize, innovate and assure the robustness of your networks. And we put our heart into it, our work is our passion.

Jan De Beule

EMEA

Charlie Viaene

AMER-APAC

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