Basic CBT Module-5 Radio & Radar Fundamentals
The basic CBT module BM-05 introduces the essential concepts relating to radio waves transmission, propagation, and reception. The radio systems used in aircraft are also discussed. The topics covered in this CBT are listed below. The CBT comprises of 327 pages of courseware that include text, audio, and graphics.
- Radio Theory
- Propagation of radio waves
- Polarization
- Antennas and their Radiation Patterns
- Transmitters and receivers (Functional Description)
- Transmitters and Receivers Block Diagram Description explaining the following:
- RF Amplifier
- IF Amplifier
- Oscillators
- Frequency synthesizers
- Frequency multipliers
- Mixers
- Detectors
- BFO
- AGC
- Noise limiters
- Muting circuits
- Audio amplifiers
- Modulators
- RF power amplifiers
- Matching units
- Filters and tuned circuits.
- Interference
- Principles and methods used to minimise the effect of conducted and radiated
- Interference
- Methods used to minimise the effects of lightning strikes and static on aerials.
- Aerials and Feeders
- Diplexers, baluns and matching stubs
- Fixed and variable matching arrangements
- Communication and navigation Bandwidth
- Location and type of Comm./NAV. aerials
- Orientation and Radiation Patterns of each of the above Comm./NAV. aerial
- Communication
- Calculation of standing wave ratio
- Control and monitoring circuits
- Pulse Techniques
- Radar transmitter/receiver
- Pulse modulation
- Peak power and average power
- PRF
- Duty cycle
- Pulse Characteristics: pulse shape, pulse width, Pulse rise time
- Range accuracy and resolution
- Receiver bandwidth
- Noise.
- Audio Systems
- Intercommunication
- Audio mixing and distribution systems
- Public address System
- Entertainment system
- Headsets and microphones
- Cockpit Voice Recorders
- Signal sources
- Control circuitry
- Hot microphone
- Fuel heaters
- Regulatory Requirements
- VHF/HF Communications Systems
- Airborne installations
- Emergency Locator Transmitters (ELT)
- VOR/ILS Systems
- Ground station signals and radiation pattern
- Phase Comparison
- Airborne installations: VOR Receiver, controls, indication/display
- AFCS and instrument interface.
- Marker Systems
- Ground station signals
- Airborne installations: Marker Receiver,indication/display
- AFCS and instrument interface
- Automatic Direction Finding Systems
- Receiver
- Loop and sense aerials and feeders
- Bearing errors and correction
- Aircraft swinging
- VLF and Hyperbolic Systems
- Receiver
- Computer
- Display
- Interface with other systems
- Flight Compartment Electronic Display Systems
- EADI
- EHSI
- Symbol generator
- Control panels
- MFD
- Engine indicating and crew alerting systems
- Microwave Landing Systems (TRSB)
- Principle of Operation
- Receiver
- Computer
- Interface and with other systems
- Primary Radar Systems
- Principle of Operation (Pulse Radar, Doppler radar,Weather radar
- Control and monitor circuits, indicators, displays,scanners, waveguides;
- Radio altimeters
- Pulse and FM-CW systems
- Displays
- Interface with other aircraft systems;
- Secondary Radar Systems
- DME
- Indicators, control and monitor circuits, interface with other aircraft systems
- ATC Transponders
- Instrument system interface, control and monitor circuits.
- Morse Code
- Identification of alphanumeric messages
