This describes the essential skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of safe working practices and diagnosing and rectifying faults in digital transmission systems

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEHA Digital television transmission faults

Evidence shall show an understanding of advanced digital television principles digital television transmission towers and equipment and digital television transmission faults applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Audio component encompassing

Audio Encoding

Audio Masking

Audio sub band encoding

T Dolby AC

T MPEG System Layer encompassing

PES Packet Construction

Time Stamps

Programme Clock Reference PCR

Transport Packet Header

Programme Specific Information PSI

T Channel Encoding

Forward Error Correction FEC

Bit Error Rate BER

Puncturing

T Interleaving

T Modulation

Phase Shift Keying PSK

Quadrature Amplitude Modulation QAM

Orthogonal Frequency Division Multiplexing OFDM

Coded Orthogonal Frequency Division Multiplexing

COFDM

T Hierarchical Modulation

Terrestrial Channel Encoder

Satellite Channel Encoder

Carrier to Noise Ratio CN

T Single Frequency Networks

Guard Interval

Megaframes

T The requirements of DTTB program input and monitoring equipment encompassing

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

Terminologies Examples are Vertical Multilevel Tieline Routing and cross point

typical signal types processed by a router

the purpose of redundant 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

T The operating characteristics of a digital television terrestrial broadcast DTTB transmitter encompassing

typical DTTB digital transmission system

safety precautions required when working with high power RF transmitters

operating characteristics of a typical MPEG encoder

operation of a coded orthogonal frequency division multiplex COFDM modulator

arrangement of subsystem 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

T The performance requirements of the DTTB combiner and antenna systems encompassing

minimum channel separation required between digital and analogue TV channels

typical specifications of an antenna combiner system

the need for combiner systems in DTTB systems

typical system faults in combiners and antenna system

T 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 Example of component failure deemed as critical are 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

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

The Evidence Guide forms an integral part of this unit It must be used in conjunction with all parts of the unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the Industrypreferred model for apprenticeships However where summative or final assessment is used it must include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment It is recognised that in some circumstances assessment in part or full can occur outside the workplace However it must be in accord with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work influence decisions about howhow much the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites shall be met

Evidence for competence in this unit shall be considered holistically Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Diagnose and rectify faults in digital transmission systems as described in and including

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 by drawing on essential knowledge and skills to provide appropriate solutions incorporated in a holistic assessment with the above listed items

Note

Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

The resources used for assessment should reflect current industry practices in relation to diagnosing and rectifying faults in digital transmission systems

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note

Competent performance with inherent safe working practices is expected in the industry to which this unit applies This requires that the specified essential knowledge and associated skills are assessed in a structured environment which is primarily intended for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit

The critical aspects of occupational health and safety covered in unit UEENEEEA and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE101A and other discipline specific occupational health and safety units shall be incorporated in relation to this unit.