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Questions and Answers
What is the primary function of the transmitter in an electronic communication system?
Which type of communication system allows for two-way communication where both parties can transmit simultaneously?
In which type of communication system can only one party transmit at a time?
What is NOT a part of an electronic communication system?
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Which type of signal is characterized by continuous variation?
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What kind of communication does a simplex system primarily support?
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What is an example of a half-duplex communication system?
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What role does 'noise' play in an electronic communication system?
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Which type of transmission does not require modulation?
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What modulation technique varies the phase of the carrier wave?
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Which of the following best describes digital signals?
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What is the fundamental purpose of modulation in communication systems?
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Which transmission type requires modulation to transmit signals over longer distances?
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Which modulation technique is synonymous with converting digital signals to analog form?
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What does multiplexing allow in communication systems?
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Which of the following statements is true regarding digital modulation techniques?
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Study Notes
Electronic Communication
- Transmission, reception, and processing of information using electronic signals and devices.
Types of Electronic Communication Systems
- Simplex: One-way communication. Example: TV broadcasting.
- Half-Duplex: Two-way communication, but only one party can transmit at a time. Example: Walkie-talkies.
- Full-Duplex: Two-way communication where both parties can transmit simultaneously. Example: Phone call.
- Full-Full Duplex: A system that allows simultaneous transmission and reception, but not necessarily between the same two locations. Example: Conference call.
Parts of an Electronic Communication System
- Transmitter: Converts information into a signal suitable for the medium. Contains components like amplifiers, filters, oscillators, modulators, and mixers.
- Channel: Medium where signals are sent (e.g., air, copper wire, optical cable).
- Receiver: Converts signal back into its original form.
- Noise: Interference that affects signal quality.
Two Types of Signals
- Analog Signal: Continuously varying signal (e.g., audio, video). Think "Analog Changes Continuously".
- Digital Signal: Discrete, defined levels (e.g., binary signal in computers). Think "Digital Steps".
Types of Modulation
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Analog Modulation:
- Amplitude Modulation (AM): Varies amplitude of the carrier wave.
- Frequency Modulation (FM): Varies frequency of the carrier wave.
- Phase Modulation (PM): Varies phase of the carrier wave.
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Digital Modulation:
- Amplitude Shift Keying (ASK): Changes amplitude of the carrier wave.
- Frequency Shift Keying (FSK): Changes frequency of the carrier wave.
- Phase Shift Keying (PSK): Changes phase of the carrier wave.
- Pulse Code Modulation (PCM): Converts analog signals to digital.
Transmission Techniques
- Modulation: Process of changing a baseband signal (intelligence) into a higher frequency signal (carrier) for long-distance transmission.
- Multiplexing: Technique that allows multiple signals to share the same communication channel.
Transmission Types
- Baseband Transmission: Direct transmission of signals without modulation. Example: Telephone systems. "Baseband = Basic" (no modulation needed).
- Broadband Transmission: Requires modulation to send over longer distances. Example: Radio signals. "Broadband = Beyond" (modulation needed to go further).
Additional Notes
- Major differences between Electronics and Communications Engineering (ECE) and Electrical Engineering (EE): ECE focuses on communication systems, while EE focuses on hardware.
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Description
Test your knowledge on the fundamentals of electronic communication systems! This quiz covers various types of communication, components of communication systems, and the functions of transmitters, receivers, and channels. Assess your understanding of simplex, half-duplex, full-duplex, and more!
