Fundamentals of Electronic Communication System Quiz PDF

Here are the answers to each question for your quiz on the Fundamentals of Electronic Communication System: 1. **Analog vs. Digital Signal:** - Analog signal: Continuous and varies smoothly over time. - Digital signal: Discrete and changes in steps or intervals, typically represented as b...

Here are the answers to each question for your quiz on the Fundamentals of Electronic Communication System: 1. **Analog vs. Digital Signal:** - Analog signal: Continuous and varies smoothly over time. - Digital signal: Discrete and changes in steps or intervals, typically represented as binary (0s and 1s). 2. **Signal degradation proportional to the square of the distance** – Free-space path loss. 3. **Decibels** – Noise power is measured in decibels (dB), which expresses the signal-to-noise ratio (SNR) as 10 * log(signal power/noise power). 4. **Ways to make the baseband signal change the carrier sine wave:** - Amplitude Modulation (AM) - Frequency Modulation (FM) - Phase Modulation (PM) 5. **Message in electronic communication system** – Information or signal. 6. **Range of electromagnetic signals encompassing all frequencies** – Electromagnetic spectrum. 7. **Long-distance communications invented in the 19th century** – Telegraph, Telephone, Radio. 8. **Modulation vs. Multiplexing:** - Modulation: Altering the properties of a carrier signal to transmit data. - Multiplexing: Combining multiple signals for transmission over a single communication channel. 9. **Components of a communication system:** - Transmitter - Medium/Channel - Receiver 10. **Government agencies responsible for spectrum management:** - Federal Communications Commission (FCC) - National Telecommunications Commission (NTC) - International Telecommunication Union (ITU) 11. **Most commonly used digital code in communications** – ASCII (American Standard Code for Information Interchange). 12. **Different light waves of the optical spectrum:** - Infrared (IR) - Visible light - Ultraviolet (UV) 13. **General term for phenomenon degrading transmitted information** – Noise. 14. **Basic types of multiplexing:** - Time Division Multiplexing (TDM) - Frequency Division Multiplexing (FDM) - Code Division Multiplexing (CDM) 15. **Long-distance communication methods used by early humans:** - Smoke signals - Fire beacons - Drums - Flags - Carrier pigeons 16. **Form of two-way communication where only one party transmits at a time** – Half-duplex. 17. **Number of times a phenomenon occurs in a given period** – Frequency. 18. **Specifications and guidelines for compatibility between equipment** – Standards. 19. **Collection of electronic components designed for transmission** – Transmitter. 20. **Organizations that maintain communication system standards:** - IEEE (Institute of Electrical and Electronics Engineers) - ITU (International Telecommunication Union) - ISO (International Organization for Standardization) 21. **Examples of communication channels:** - Optical fiber - Radio waves - Coaxial cable 22. **Transmitter and receiver at the same time** – Transceiver. 23. **General model of a communication system:** - Information source → Transmitter → Channel → Receiver → Destination (Draw this model in the exam). 24. **Range of FM radio broadcasting** – 88 MHz to 108 MHz. 25. **Baseband vs. Broadband:** - Baseband: Transmits a single signal over a channel, often over short distances. - Broadband: Transmits multiple signals simultaneously over long distances. 26. **Medium by which the signal is sent** – Communication channel. 27. **Process allowing multiple signals to share the same medium** – Multiplexing. 28. **Light signal with a narrow beam that can be modulated** – Laser. 29. **Electromagnetic spectrum:** (Draw the spectrum showing radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays in order). 30. **Portion of the electromagnetic spectrum occupied by a signal** – Bandwidth. 31. **Collection of components accepting and converting transmitted messages** – Receiver. 32. **Examples of transmitting digital data by modulation:** - ASK (Amplitude Shift Keying) - FSK (Frequency Shift Keying) 33. **Term describing equipment compatibility across manufacturers** – Interoperability. 34. **Process of exchanging information** – Communication. 35. **Common AC power line frequency range** – 50 Hz to 60 Hz. 36. **System using free space as a communication medium** – Wireless communication. 37. **Upper-frequency limit of a television signal occupying 6 MHz bandwidth (Channel 2 with 54 MHz lower limit):** - Upper limit = 54 MHz + 6 MHz = **60 MHz**. 38. **Frequency of an electromagnetic wave with 8-inch separation between peaks**: - Using \( f = \frac{c}{\lambda} \), where \( c \) is the speed of light and \( \lambda \) is the wavelength, the frequency is approximately **1.5 GHz**. 39. **Emphasis shifting from manufacturing to information exchange** – Information Age. 40. **Examples of communication channels:** - Fiber-optic cables - Satellite links - Twisted pair wires.