Download DBATU B.Tech 2019 March 4th Semester Communication Engineering ACE Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B Tech 2019 March (Bachelor of Technology) 4th Semester Communication Engineering ACE Question Paper

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DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY,
LONERE ? RAIGAD -402 103
Mid Semester Examination ? March - 2019
Class}: B. Tech (E&TC) I Sem.:~ IV
Subjectz? Analog Communication Engineering (ACE) VMarks: 20
_Sobhedr coda ? BTEXCA'OL - , v
Date:? 194 03? Lo \ 3 Time:- 1 Hr.
? Instructions: Assume suitable data if required.
? (Marks)
Q.N0.?1 Attempt any six of the following; ' ' (06)
t 3.) Explain Simplex and Duplex systems.
b.) List various modes of communication.
c.) State sampling theorem.
d.) What is moghilation?? Give their types.
? e.)'Defme modulation Index for amplitude modulated signal.
f.) De?ne low and high power level modulation.
g.) What is Digital modulation? State its advantages.
h.) Identify the amount of power saved if carrier alone is suppressed.
? Q. No.2 Attempt any two of the following: (06)
' ' a.) Discuss TDM technique. ? ,
b.) Derive an expression for instantaneous voltage for FM signal.
c.) Draw and explain Phase shift method for SSB generation.
. Q.No.3 Attempt any one of the following: ?
a.) A 10 KW cairier?wave is amplitude modulated at 80% depth of modulation by
a sinusoidal modulating signal. Calculate the side band p0wer,t0ta1 power and the ?
transmission ef?ciency of the AM wave. ?
b.) Draw and explain the block diagram of ISB generation technique.
(08)