8) 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 setting-up and adjusting commercial radio frequency (RF) transmission and reception systems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH127A Commercial radio frequency (RF) transmission and reception systems Evidence shall show an understanding of commercial radio frequency (RF) transmission and reception systems, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Electronic communications, transmission lines Time domain reflectometry measurements Radio frequency characteristics of transmission lines Losses in transmission lines Radiation characteristics of antennae Directional antennae Antennae matching UHF and microwave antennae T2. Electronic communications, antennas and wave propagation Antenna fundamentals - characteristics of radio waves, antenna operation, antenna reciprocity and the basic antenna. Antenna types, feature and characteristics encompassing: Dipole antennas and characteristics - radiation resistance, dipole length, antenna resistance, antenna Q and bandwidth, conical antennas, dipole polarisation, radiation patterns and directivity, antenna gain and folded dipoles Marconi ground-plane vertical antenna features and characteristics - radiation pattern, ground plane radials and counterpoise, radiation resistance, antenna length and directivity, UHF and microwave antennas Relationship between directivity and gain Antenna arrays - parasitic arrays and driven arrays Impedance matching Radio wave propagation characteristics - optical characteristic, propagation through space Calculation of received power Antenna selection and location Transmission lines T3. Advanced electronic testing and measuring devices and techniques Test/measuring devices and their application - frequency counters, and synthesisers, spectrum analysers, noise and distortion meters and RF communications service monitor. Connection of test/measuring devices into a circuit encompassing: safety procedures loading and matching storage and delay circuit arrangement of test/measuring devices Taking and interpreting readings Notion of decibels including dBm, dBr, dBu, dBo T4. Electronic communications, antennas and wave propagation Antenna fundamentals - characteristics of radio waves, antenna operation, antenna reciprocity and the basic antenna. Antenna types, feature and characteristics encompassing: Dipole antennas and characteristics - radiation resistance, dipole length, antenna resistance, antenna Q and bandwidth, conical antennas, dipole polarisation, radiation patterns and directivity, antenna gain and folded dipoles Marconi ground-plane vertical antenna features and characteristics - radiation pattern, ground plane radials and counterpoise, radiation resistance, antenna length and directivity, UHF and microwave antennas Relationship between directivity and gain Antenna arrays - parasitic arrays and driven arrays Impedance matching Radio wave propagation characteristics - optical characteristic, propagation through space Calculation of received power Antenna selection and location Transmission lines |