JNTU
JNTU B.Tech III Year PRINCIPLES OF ELECTRONIC COMMUNICATIONS Previous Question Paper (November/December - 2018 - R16)
Part A is compulsory. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Draw the block diagram of a communication system.
Answer
Explain how baseband transmission is different from broad band transmission?
Answer
- Baseband transmission involves sending the original signal (e.g., digital pulses) directly over the medium without frequency shifting. It occupies the entire bandwidth of the transmission medium.
- Broadband transmission involves modulating the signal onto a high-frequency carrier wave. This allows multiple signals to be transmitted simultaneously over the same medium using frequency division multiplexing.
Define amplitude modulation.
Answer
Sign in to view the complete answer paper.
Write the advantages of digital modulation schemes.
Answer
Sign in to view the complete answer paper.
Explain the operation of a bridge.
Answer
Sign in to view the complete answer paper.
Explain the operation of a NIC.
Answer
Sign in to view the complete answer paper.
Define numerical aperture.
Answer
Sign in to view the complete answer paper.
Draw the block diagram representing the basic elements of a fiber optic communication system.
Answer
Sign in to view the complete answer paper.
What is handoff?
Answer
Sign in to view the complete answer paper.
Discuss common Zigbee network topologies.
Answer
Sign in to view the complete answer paper.
Part B
Write short notes on:
- Gain
- Attenuation
- Decibels
Answer
Sign in to view the complete answer paper.
Why modulation is used in communication circuits? Discuss.
Answer
Sign in to view the complete answer paper.
Draw the block diagram of PCM system and explain.
Answer
Sign in to view the complete answer paper.
Define PWM and explain the concept of PWM using relevant waveforms.
Answer
Sign in to view the complete answer paper.
Explain the basic principle of frequency modulation. Also explain a method to generate FM signal.
Answer
Sign in to view the complete answer paper.
Explain a method to demodulate AM signal.
Answer
Sign in to view the complete answer paper.
Explain the operation of a paging system using a block diagram.
Answer
Sign in to view the complete answer paper.
Classify computer networks and explain.
Answer
Sign in to view the complete answer paper.
Discuss the topology, encoding and transmission media used in Ethernet LANs.
Answer
Sign in to view the complete answer paper.
Explain the operation of telemetry, command and control subsystems of satellite.
Answer
Sign in to view the complete answer paper.
Explain the operation of a GPS receiver using a block diagram.
Answer
Sign in to view the complete answer paper.
Draw the general block diagram of an earth station and explain.
Answer
Sign in to view the complete answer paper.
Explain single mode step index and multimode graded index fiber optic cables.
Answer
Sign in to view the complete answer paper.
Draw the block diagram of a RFID tag and explain.
Answer
Sign in to view the complete answer paper.
Discuss GSM system in detail.
Answer
Sign in to view the complete answer paper.
Discuss the basic forms of UWB wireless and also different types of UWB modulations.
Answer
Sign in to view the complete answer paper.
Discuss WCDMA in detail.
Answer
Sign in to view the complete answer paper.