My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted By: Sree.... Member Level: Diamond Posted Date: 21 May 2008
|
2007 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech COMMUNICATION ENGINEERING Set No. 1 Question paper
|
|
|
Code No: RR321001 Set No. 1
III B.Tech II Semester Regular Examinations, Apr/May 2007
COMMUNICATION ENGINEERING
(Electronics & Instrumentation Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Explain the principle of Balanced modulator using diodes to generate AM
wave.
(b) Explain the working principle of linear diode detector method of AM demod-
ulation. [8+8]
2. (a) Explain briefly about the two types of FM.
(b) Explain how a PLL can be used for FM detection. [6+10]
3. (a) Explain the operation of plate modulated AM generator with circuit diagram.
(b) Explain the operation of high level transistor collector modulator circuit. [8+8]
4. With the help of a setup, explain the measurement procedure for obtaining the
characteristics of a radio receiver. [16]
5. (a) Explain the source of shot noise and get the expression for its power density
spectrum.
(b) The noise figure of an amplifier is 7 db. Calculate the equivalent amplifier
noise referred to the input for a bandwidth of 500 MHz. [8+8]
6. (a) Distinguish between PAM, PWM and PPM.
(b) What is TDM? Distinguish between synchronous and asynchronous TDM.
[8+8]
7. (a) Discuss the bandwidth efficiency of M-ary digital modulation techniques.
(b) Draw the signal space diagram of coherent QPSK system and explain. [8+8]
8. (a) What is the purpose of the serial interface?
(b) Draw the timing diagram showing the state of all EIA-232 leads between two
DTE-DCE pairs during the course of a data call on the switched telephone
networks. [8+8]
? ? ? ? ?
1 of 1
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
Watch TV Channels
|