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Evidence Guide: UEEEC0023 - Diagnose and rectify faults in digital transmission circuits and systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

UEEEC0023 - Diagnose and rectify faults in digital transmission circuits and systems

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to diagnose and rectify digital transmission circuits and system faults

  1. Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are obtained and applied
Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are obtained and applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

WHS/OHS risk control measures and workplace procedures are followed in preparation for digital transmission circuits and system work

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety hazards which have not previously been identified are risk assessed, documented and risk control measures devised and implemented in consultation with appropriate person/s

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Extent of faults is determined from reports, documentation and discussions with appropriate person/s

Completed
Date:

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Appropriate person/s is consulted to ensure digital transmission circuits and system work is coordinated effectively with others involved on the worksite

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Tools, equipment and testing devices needed to diagnose faults are obtained in accordance with workplace procedures and checked for correct operation and safety

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnose and rectify digital transmission circuits and system faults

  1. WHS/OHS risk control measures and workplace procedures for carrying out digital transmission circuits and system work are followed
WHS/OHS risk control measures and workplace procedures for carrying out digital transmission circuits and system work are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Need to test and measure live work is determined in accordance with WHS/OHS requirements and, as required, conducted in accordance with workplace safety procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Circuits/machines/plant are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Logical diagnostic methods are applied to diagnose digital transmission apparatus faults using measurements of circuit operating parameters in accordance with apparatus operating specifications

Completed
Date:

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Suspected fault scenarios are tested as being the source of digital transmission circuit system problem

Completed
Date:

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Faults in the electronic components of the digital transmission apparatus are rectified to circuit and system operation standard

Completed
Date:

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Circuits are inspected and tested to verify that digital transmission circuit apparatus operates as intended and to specified requirements

Completed
Date:

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Unplanned situations are responded to in accordance with workplace procedures, discussions with appropriate person/s and consistent with job specifications and requirements in a manner that minimises risk to personnel and equipment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnosis and rectification activities are carried out efficiently without waste of materials or damage to apparatus, the surrounding environment or services using sustainable energy practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete and report fault diagnosis and rectification activities

  1. WHS/OHS work completion risk control measures and workplace procedures are followed
WHS/OHS work completion risk control measures and workplace procedures are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Worksite is made safe in accordance with workplace safety procedures

Completed
Date:

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Rectification of digital transmission circuit and system faults is documented in accordance with workplace procedures

Completed
Date:

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Appropriate person/s is notified in accordance with workplace procedures that apparatus faults have been rectified

Completed
Date:

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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

applying logical diagnostic methods

using fault scenarios to test the source of circuit faults

identifying the cause faults using logical diagnostic methods

rectifying faults effectively

verifying that the apparatus operates correctly

documenting fault rectification

dealing with unplanned events

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, workplace procedures and practices, including using risk control measures

applying sustainable energy principles and practices.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

digital television transmission faults, advanced digital television principles, digital television transmission towers and equipment, applying safe working practices and relevant standards, codes and regulations, including:

audio component encompassing:

audio encoding

audio masking

audio sub-band encoding

Dolby AC-3

MPEG-2 system layer encompassing:

PES packet construction

time stamps

programme clock reference (PCR)

transport packet header

programme specific information (PSI)

channel encoding:

forward error correction (FEC)

bit error rate (BER)

puncturing

interleaving

modulation:

phase shift keying (PSK)

quadrature amplitude modulation (QAM)

orthogonal frequency division multiplexing (OFDM)

coded orthogonal frequency division multiplexing (COFDM)

hierarchical modulation:

terrestrial channel encoder

satellite channel encoder

carrier to noise ratio (C/N)

single frequency networks:

guard interval

mega-frames

the requirements of digital television terrestrial broadcast (DTTB) program input and monitoring equipment encompassing:

basic system arrangement: a central router connected to a number of control rooms

terminologies: vertical, multi-level; tie-line routing and cross point

typical signal types processed by a router

the purpose of redundant central processing units (CPUs) and power supply units

common control protocols used in routers

typical analogue audio and video output voltage levels present at the router

typical specifications for digital data signals present at the router

function of various test equipment used in DTTB measurements

the operating characteristics of a DTTB transmitter encompassing:

typical DTTB digital transmission system

safety precautions required when working with high power radio frequency (RF) transmitters

operating characteristics of a typical MPEG encoder

operation of a COFDM modulator

arrangement of sub-system components in a DTTB transmitter

purpose of an up converter in a DTTB transmitter

typical characteristics of a DTTB power amplifier

advantages and disadvantages of air and liquid cooling systems used in transmitters

typical DTTB transmitter measurements techniques

the performance requirements of the DTTB combiner and antenna systems encompassing:

minimum channel separation required between digital and analogue television channels

typical specifications of an antenna combiner system

the need for combiner systems in DTTB systems

typical system faults in combiners and antenna system

the requirements of remote monitoring and measurement equipment encompassing:

purpose of control panel indicators and controls

process by which the system manages a critical failure: power supplies and CPUs

different system alarm signals

periodic equipment self-tests and diagnostic routines on DTTB systems

DTTB systems fault diagnostic and rectification techniques

function of the basic components of a DTTB system

typical units of a DTTB telemetry system

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Diagnosing and rectifying faults in digital transmission circuits and systems must include at least the following:

two circuit faults in two different types of digital transmission systems