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 fault finding and repairing radar apparatus and systems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH131A Radar apparatus and system fault finding and repair/ Radar apparatus and system? Evidence shall show an understanding of Radar apparatus and system fault finding and repair, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Electronic communications, secondary radar and related systems Secondary radar principles encompassing: Role of secondary radar Transponder operation Operating principles Signal processing Pulse generation, transmission and detection Mode generation, detection and response Display symbol generation Synchronisation with primary radar Advantages over primary radar with respect to: clutter; signal/noise ratio; transmit power required for operation Interfaces to other systems providing information for transmission of mode data encompassing: Slaving/synchronisation to primary radar Clutter reduction/elimination Defruiting Degarbling Interfaces to other systems Range/ducting effects Advantages over primary radar Power supplies and UPS International standards National Curriculum Hot standby, cold standby Application of secondary radar systems- Traffic Collision Avoidance System (TCAS), Selective Identification System (SIF), Air Traffic Control Radar Beacon System (ATCRBS), Instrument Landing System (ILS), Tactical Air Navigation (TACAN), Navigation Systems (VOR, GPS, DME), Radar Altimeter, Jamming, Electronic warfare, Second Time Round Returns (STRR), and Identification –friend or foe radar (IFF). T2. Electronic communications, radar and sonar displays devices Types and their applications - CRT, Plasma, LCD, Monochrome, Colour, and Touch screen. Sub-system components (i.e. functional blocks) and their operating parameters encompassing: EHT transformers detectors video distribution time base generators phase locked loops microprocessors memory devices demodulators focusing/deflection devices delay lines bleed resistors HV generation Calibration testing and maintenance procedures Typical fault finding, their symptoms and cause T3. Electronic communications, radar fundamentals Hazards and risk control measures Purpose and uses of radar Environmental conditions affecting radar Design factors which affect performance Propagation of electromagnetic waves Pulse forming circuits Typical radar transmitter encompassing: limitations and applications of each type Typical radar receivers encompassing: Sub-system components (i.e. functional blocks) and their operating parameters limitations and applications Radar antennae encompassing: Types, application and radiation patterns - parabolic, phased array, log periodic, and cos q antenna gain efficiency length and height factors Microwave techniques, devices and applications encompassing: oscillators amplifiers modulators and demodulators mixers and detectors Types and characteristics of various radar systems |