Principle of Electronic Communication

Q.1. What is the fundamental need for modulation in electronic communication? [2]

Q.2. Define 'Gain' and 'Attenuation' in the context of a communication system. [2]

Q.3. Distinguish between PAM and PWM. [2]

Q.4. List two advantages of Digital Modulation over Analog Modulation. [2]

Q.5. What is the primary function of a telephone hybrid in a telephone system? [2]

Q.6. Name two common types of LAN hardware. [2]

Q.7. What is the main difference between Geostationary Earth Orbit (GEO) and Low Earth Orbit (LEO) satellites? [2]

Q.8. Mention two advantages of using fiber-optic cables over copper cables for communication. [2]

Q.9. What is the key principle behind Code Division Multiple Access (CDMA)? [2]

Q.10. Briefly explain the purpose of ZigBee technology. [2]

Q.1. Describe the process of demodulation for an Amplitude Modulated (AM) signal using a simple envelope detector. [4]

Q.2. With a neat diagram, explain the components and working of a Global Positioning System (GPS). [4]

Q.3. Compare and contrast Ethernet LANs and Token Ring LANs based on their access methods and topologies. [4]

Q.4. Draw a block diagram of a basic Satellite Communication System, labeling its main components. [4]

Q.5. Describe the concept of Wavelength Division Multiplexing (WDM) in optical communication and its benefits. [4]

Q.6. Explain the 'cellular concept' in mobile communication and how it helps in frequency reuse. [4]

Q.7. Discuss the key features and applications of Bluetooth technology. [4]

Q.1. (a) Explain the generation and demodulation process of Frequency Modulation (FM) using suitable block diagrams. [7]

(b) A signal has a power of 50 mW at the input of an amplifier. If the amplifier has a gain of 20 dB, what is the output power in Watts? [3]

Q.2. (a) Describe the process of Pulse Code Modulation (PCM). Clearly explain the three main steps involved: sampling, quantization and encoding. [6]

(b) Compare ASK, FSK and PSK digital modulation techniques based on their bandwidth efficiency, noise immunity and complexity. [4]

Q.3. (a) Discuss the fundamental principles of the Internet and its evolution as a telecommunication system. [5]

(b) Explain the different layers involved in a typical Local Area Network (LAN) architecture and their respective functions. [5]

Q.4. (a) Compare and contrast GSM and CDMA cellular communication systems in terms of their multiple access techniques, security features and typical applications. [6]

(b) Explain the working principle and applications of RFID (Radio Frequency Identification) communication. [4]

Q.5. (a) Describe the architecture and working of a Wireless LAN (WLAN) based on the IEEE 802.11 standard. [6]

(b) Discuss the advantages and disadvantages of Infrared Wireless communication compared to RF-based wireless technologies. [4]