Principles of Electronic Communication System PDF

PRINCIPLES OF ELECTRONIC COMMUNICATION SYSTEM WHAT IS ELECTRONIC TWO WAYS OF ELECTRONIC COMMUNICATION? COMMUNICATION Electronic Communication 1. One Way Answer: Transmission, reception, and 2. Two Way proces...

PRINCIPLES OF ELECTRONIC COMMUNICATION SYSTEM WHAT IS ELECTRONIC TWO WAYS OF ELECTRONIC COMMUNICATION? COMMUNICATION Electronic Communication 1. One Way Answer: Transmission, reception, and 2. Two Way processing of information using electronic signals (devices). TYPES OF COMMUNICATION SYSTEMS Clue: "SHF(FF)" (Simplex, Half- Duplex, Full-Duplex, and Full-Full Duplex) 1. Simplex o One-way communication (e.g., TV broadcasting). PARTS OF ELECTRONIC 2. Half-Duplex COMMUNICATION SYSTEM o Two-way communication, but only one party can transmit at a Clue: "TCRN" time (e.g., walkie-talkies). (Transmitter, Channel, Receiver, Noise) 3. Full-Duplex o Two-way communication where 1. Transmitter both parties can transmit o Converts information into a simultaneously (e.g., phone signal suitable for the medium. call). o Components: - Amplifiers 4. Full-Full Duplex - Filters o A system that allows - Oscillators simultaneous transmission and - Modulators reception, but not necessarily - Mixers between the same two locations. (e.g., conference 2. Channel call. (Transmission Medium) o Medium where signals are sent (air, copper wire, optical cable). TWO TYPES OF SIGNAL 3. Receiver Clue: "A Changes, D Steps" o Converts signal back into its original form. 1. Analog Signal o Continuously (infinite) varying 4. Noise signal (e.g., audio, video). o Interference that affects signal o Think: "Analog Changes quality. Continuously".  PRINCIPLES OF ELECTRONIC COMMUNICATION SYSTEM 2. Digital Signal o Phase Modulation (PM) - o Discrete (finite), defined levels Varies phase of the carrier (e.g., binary signal in wave. computers). o Think: "Digital Steps" 2. Digital Modulation (changes abruptly). o Amplitude Shift Keying (ASK) o Frequency Shift Keying (FSK) o Phase Shift Keying (PSK) o Pulse Code Modulation (PCM) TRANSMISSION TYPES \ Clue: "BB" (Baseband, Broadband) 1. Baseband Transmission o Direct transmission of signals TRANSMISSION TECHNIQUES without modulation (e.g., telephone systems). Clue: "MM" (Modulation, Multiplexing) o "Baseband = Basic" (no modulation needed). 1. Modulation o Process of changing a 2. Broadband Transmission baseband signal (intelligence) o Requires modulation to send into a higher frequency signal over longer distances (e.g., (carrier) for long-distance radio signals). transmission. o "Broadband = Beyond" (modulation needed to go 2. Multiplexing further). o Technique that allows multiple signals to share the same communication channel. ADDITIONAL NOTES Major differences between TYPES OF MODULATION Electronics and Communications Engineering (ECE) and Electrical Clue: "AFPP" (AM, FM, PM, PCM) Engineering (EE): 1. Analog Modulation Hardware vs. Power Systems: o Amplitude Modulation (AM) - Varies amplitude of the ECE: Focuses more on low-power carrier wave. electronics and communication hardware. o Frequency Modulation (FM) - Varies frequency of the EE: Emphasizes high-power electrical carrier wave. systems and energy distribution.  PRINCIPLES OF ELECTRONIC COMMUNICATION SYSTEM Current vs. Voltage vs. Resistance Current – flow of electron Voltage – flow of current Resistance – resists the flow of current Which is deadly upon contact: current or voltage? Answer: The current (amperage) is what is deadly to the human body, NOT the voltage itself. Why does the signage say 'Don't Touch, High Voltage' if the current is deadly upon contact? Answer: Familiarity with Voltage: People are generally more familiar with the concept of voltage than current. High voltage sounds more dangerous to the general public, even though it’s the current that ultimately poses the lethal risk.