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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Measure electrical signals (with electronic instruments) 
SAQA US ID UNIT STANDARD TITLE
115026  Measure electrical signals (with electronic instruments) 
ORIGINATOR
SGB Audio-visual Media Production 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 04 - Communication Studies and Language Communication Studies 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2026-06-30   2029-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard will be essential to technically skilled people who work in the broadcasting environment and need to use sophisticated methods and equipment to fault find professional broadcasting equipment
People credited with this standard will be able to:
  • Perform measurements in electronic circuits (using analogue and digital multimeters)
  • Measure waveforms in electronic circuits (using a cathode ray oscilloscope (CRO))
  • Test electronic circuits (using function generators and frequency counters). 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    N/A 

    UNIT STANDARD RANGE 
    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Perform measurements in electronic circuits (using analogue and digital multimeters) 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Continuity tests on connections are performed and evaluated correctly 

    ASSESSMENT CRITERION 2 
    Measurements of voltages and currents in DC and AC resistive networks are taken and evaluated correctly 

    ASSESSMENT CRITERION 3 
    Interpretation of manufacturer's specification for an analogue and a digital multimeter is correct 

    ASSESSMENT CRITERION 4 
    Identification of the loading effects of multimeters, as ammeters and voltmeters, are correct and in accordance with the expected values 

    SPECIFIC OUTCOME 2 
    Measure waveforms in electronic circuits (using a cathode ray oscilloscope (CRO)) 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The adjustments and calibrations of oscilloscopes are in accordance with manufacturer's specification 

    ASSESSMENT CRITERION 2 
    The measurement and explanation of the displayed waveform is correct 
    ASSESSMENT CRITERION RANGE 
    Displayed waveform: square; sine; triangular; ramp; pulse
     

    ASSESSMENT CRITERION 3 
    The measurement of the response of RC integrator and RC differentiator circuits to an applied input waveform is correct 
    ASSESSMENT CRITERION RANGE 
    Measurement: amplitude; period; shape; dc offset
     

    ASSESSMENT CRITERION 4 
    The measurement of the output voltage waveform of a smoothed dc power supply is correct under different load conditions 
    ASSESSMENT CRITERION RANGE 
    Load conditions: no load; normal load; excessive load
     

    ASSESSMENT CRITERION 5 
    The explanation of the limitations of CRO for measurement is correct 
    ASSESSMENT CRITERION RANGE 
    Limitations: low and high frequency limits; low and high amplitude
     

    SPECIFIC OUTCOME 3 
    Test electronic circuits (using function generators and frequency counters) 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Adjustments of the controls of the function generator obtain specified waveforms on the oscilloscope 

    ASSESSMENT CRITERION 2 
    The verification of the frequency of the specified waveform is correct using a frequency counter 

    ASSESSMENT CRITERION 3 
    The verification of the electronic circuit's operation is correct using a function generator and frequency counter 
    ASSESSMENT CRITERION RANGE 
    Electronic circuits: active filter; voltage controlled oscillator; two stage small signal transistor amplifier.
     

    ASSESSMENT CRITERION 4 
    The use of a logic probe and clip to measure digital signal values is correct through given combinational logic circuits 
    ASSESSMENT CRITERION RANGE 
    Combinational logic circuit: 4-input SSI; 4-input MSI
     

    ASSESSMENT CRITERION 5 
    The use of a logic analyser is correct in monitoring the output states of given sequential circuit generators 
    ASSESSMENT CRITERION RANGE 
    Sequential circuit: 4-bit MSI; 8 bit MSI
     


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Providers of learning towards this unit standard will need to meet the accreditation requirements of the relevant ETQA
    Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.

    Moderation Option:
    The moderation requirements of the relevant SETA's ETQA must be met in order to award credit to learners for this unit standard 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard
    The following embedded knowledge is addressed in an integrated way in the unit standard:
    2.1 Safety precautions and safe working practices in the broadcast environment
    2.2 Own responsibilities and accountabilities in the workplace
    2.3 Standards and procedures of the organisation
    2.4 Communication techniques when dealing with clients and colleagues
    2.5 Quality assurance of product and service delivery
    2.6 Documentation requirements and procedures
    2.7 The advantages and disadvantages of using moving coil and electronic multi-range instruments for the measurements of voltage, current and resistance
    2.8 Calculation of analogue meter impedance using manufacturer's data on sensitivity. Calculation of loading effects of analogue meters as voltmeters and ammeters
    2.9 Calibration of oscilloscope and operation of frequency counter
    2.10 Problems associated with measuring very low frequency signals
    2.11 Difference between SSI and MSI devices 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking to perform measurements 

    UNIT STANDARD CCFO COLLECTING 
    Collect and analyse signal information and critically evaluate the effect of this on work performance 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively (with clients and colleagues), using visual and / or language skills 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology (measuring equipment) effectively and critically showing responsibility towards the environment (work areas and venues) and health of others (clients and colleagues) 

    UNIT STANDARD ASSESSOR CRITERIA 
    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
    3.1 Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
    3.2 Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
    3.3 Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
    3.4 The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
    3.5 The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
    3.6 All assessments should be conducted in line with the following well documented principles of assessment: appropriate, fair, manageable, integrated into work or learning, valid, direct, authentic, sufficient, systematic, open and consistent. 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Fundamental  48792   Certificate: Broadcast Engineering  Level 5  Level TBA: Pre-2009 was L5  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  MICTS 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    1. Facilitation Development (PTY) LTD 
    2. HILLCROSS BUSINESS SCHOOL (PTY 
    3. OPELONG BUSINESS INSTITUTE (PT 
    4. SUPREME ICT CONSULTANTS 
    5. Varsity Institute of Science & Technology (Pty)Ltd 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.