ICTTEN435 — Solve electrical-based telecommunications circuitry and cabling problems

Elements & performance criteria

Performance evidence

• apply work health and safety (WHS) procedures to problem-solving electrical circuitry and cables
• connect suitable test devices incorporating a multimeter and an oscilloscope to investigate operational parameters within AC and DC circuit/s
• perform measurements and calculations on both series and parallel circuits by comparing actual readings with calculated values
• calculate and verify through tests the voltage, current and resistance in both a series and parallel AC/DC given circuit
• apply fault-finding techniques to rectify at least three electrical issues in telecommunications AC/DC circuits
• use circuit characteristics including inductance, impedance and capacitance to improve electrical or signal performance for two basic electronic filter designs
• resolve three electrical issues in an AC/DC circuit.
• Note: Evidence must be provided at least once when a specific volume or frequency is not stated.

Knowledge evidence

• safe work practices in electrical work including relevant codes of practice
• localised electrical regulatory requirements including limitations of certain electrical work
• hazards and risks involved in using electrical instruments and the safety control measures within a telecommunications system
• principles of AC and DC electricity and how they impact telecommunications work including:
• AC and DC electrical International System of Units (SI units)
• symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram including:
• series and parallel circuits for AC and DC circuits
• Ohm’s Law and other relevant calculations for AC and DC circuits
• common circuit configurations
• current and voltage phase relationships
• waveform characteristics caused by resistance, inductance and capacitance in AC and DC circuits
• common faults that cause an increase or decrease in resistance, voltage and current found in telecommunications circuits
• definitions of electrical terms: period, peak, peak-to-peak, instantaneous, average, root-mean-square value in relation to electrical waveforms
• AC electrical generation producing a sinusoidal waveform including:
• differences between analog and digital signals and devices
• sinusoidal, pulsed, and static value waveforms found in AC circuitry
• characteristics of resonance in AC circuits
• transformer use in electrical circuits including:
• basic construction, operating principles and use of transformers
• step-up, step-down, turns ratios, voltage and current ratios
• verification of operation of transformer circuit
• fault-finding techniques including:
• half circuit split
• quarter circuit split
• towards or away from source
• selection and use of testing equipment in telecommunications circuitry including:
• test devices used for signal measurement
• test devices for voltage, current and resistance
• telecommunications signal conversion characteristics including:
• analog and digital signals
• signal transmissions
• application of binary to decimal conversion and vice versa
• 4-bit binary codes with their decimal equivalent to represent output voltages of a digital to analog converter
• techniques to convert analog signals to digital and digital signals to analog
• principles of analog and digital electronics limited to block diagrams common to analog and digital circuits
• components, circuits and uses of common electronic signal filters in telecommunications (high-pass, low-pass and band-pass)
• transformer use in electrical circuits including:
• construction and operating principles and uses
• step-up, step-down, turns ratios, voltage and current ratios
• verification of operation of transformer circuit
• typical telecommunications electronic devices, cable types and their applications
• common telecommunications cables, their characteristics of use and application
• features and applications of shielding within telecommunications cables, ‘skin effect’ in cables and transmission losses.

Foundation skills

• Reading: Reads and responds to complex workplace information contained in specification manuals and standards
• Writing: Writes reports for customer on complex issues
• Oral Communication: Uses oral communication skills to participate in workplace teams and to liaise with customers and stakeholders.
• Numeracy: Calculates with whole numbers, decimals and percentages for work Uses common functions of a scientific calculator for work Uses and calculate with complex measurements for work
• Learning: Uses strategies for work-related learning Plans and manages complex workplace tasks
• Get the work done: Works logically and systematically to undertake clearly defined tasks Analyses task requirements to decide on appropriate equipment and practices Applies problem-solving processes to locate and resolve faults, and reviews impact of decisions Determines WHS and risk mitigation required for given tasks

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

Questions about assessing ICTTEN435