"3) ~./
(Please write your Exam Roll No.)
Exam Roll No ..•....•.••••.•.••.••••
END TERM EXAMINATION IPaper Code: ETIT402
EIGHTH SEMESTER [B.TECH.] MAy-JUNE 2012
.
Subject: Mobile Communication , Maximum Marks :75
Time: 3 Hours
Note: Attempt any five questions including Q.no.1 which is compulsory. Select one question from each unit.
Q4
Q5
c. in
i.a
lh
UNIT-II (a) Discuss about the following propagation models:(i) Small Scale Propagation (ii) Large Scale Propagation (b) Disc1.J.sS about the characteristics of Mobile Antennas.
Q9
(6.5) (6)
=
r~ ~ ~ ~ ~ ~1.
code word transmitted
the received
codeword is 100011. Find the corresponding dataword transmitted. (b) Explain the BPSK modulation scheme with the help of transmitter block diagrams.
and receiver
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(6)
OR
UNIT-Ill (a) A (6,3) linear block code is generated according to Generation Matrix.
G
Q7
(6.5)
(a) Write short notes on the following:(i) Fixed Channel Assignment (ii) Dynamic Channel Assignment (b) Obtain the model for mobile radio propagation over water or flat open area.
w
Q6
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Q3
UNIT-I (a) Discuss about the essential parameters that influences the performance criteria of cellular mobile systems. (6) (b) Consider a cellular system with total available voice channels to handle the traffic are 960. The area of each cell is 6km2 and the total coverage area of the system is 2000km2• (i) System capacity if clusters size is 4. (ii) System capacity if cluster size is 7. How many times the cluster size 4 is replicated to cover entire cellular area? (6.5) OR (a) Discuss about the various constraints to be considered in planning a cellular system. (6) (b) Explain how system capacity can be increased with cell splitting by maintaining constant value of frequency reuse ratio? (6.5)
ec
Q2
(a) What is Adjacent Channel Interference and how it can be minimized? (3) (b) Explain the significance of the term 'Radiation Resistance" of an antenna. (3) (c) Differentiate between Rayleigh and Rician Distribution models for a mobile radio channel. (4) (d) Write a brief note on non-fixed channel assignment strategies. (3) (e) Explain the salient features of GMSK Modulation Technique. (3) (f) Briefly discuss about Turbo coding. (3) (g) Discuss about the multiple access techniques used in 2nd generation mobile systems. (3) (h) Explain the properties of directional antennas. (3)
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Q1
lo
0
1
1
For a particular
1 0 (6) (6.5)
OR (a) What is Trellis diagram? Explain the construction of Trellis diagram with the example of a simple convolutional encoder. (6.5) (b) Draw the composition interms of capacity performance of FDMA and TDMA based systems. (6) UNIT-IV Explain the architecture model of GSM with block diagram. Discuss about different entities 'of the system. Write a brief note on various Interfaces used in GSM system. (12.5) OR Write short notes on the following:(6+6.5=12.5) (a) Voice Signal Processing in GSM (b) IS-95 Mobile Network ************
(Please writeyour Exam Roll No.)
Exam Roll No.....•.....•........•..
END TERM EXAMINATION" EIGHTH SEMESTER [B.TECH.]
MAy-JUNE
2012
IPaper Code: ETEC404 Subject: Embedded Systems Time: 3 Hours Maximum Marks :75 Note: Q.no.1 is compulsory. Attempt one question from each unit.
I
Q3
c. in
UNIT-I (a) With reference to embedded systems explain context switching, Latency and deadline. (6) (b) Differentiate Real Time Operating System and Typical Operating Systems. (6.5) (a) What is the importance of device management in an OS for an embedded system? (6.5) (b) What are the OS units at RTOS kernel? Explain each of them. (6) UNIT-II (a) What do you understand by immediate addressing, direct addressing addressing, give an example of (i) immediate addressing in that arithmetic operation. " (ii) Direct addressing in that involves an logical operation. (iii) Indirect addressing in that involves moving data operation. (b) Discuss with waveforms different modes of counter/timer in 8051.
Q6
UNIT-III (a) Describe interrupts used in 8051. Give their priority and addresses. (b) Write a program to generate 2KHz squ~re wave on pin 1.0 of prot microcontroller (use interrupt) .
(6) 1 of 8051
(a) Explain the necessity of RS 232 to TTL interface and draw the circuit. (b) What is the difference between 20mA current loop and RS232C standard? (c) Draw the circuit of TIL to RS232 and explain the necessity of this interface.
(6.5)
(6)
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Q7
(6)
(a) Write an 8051 C program to get a byte of data form PO. If it is less than 100, send it to P1, otherwise, send it to P2. (6) (b) Differentiate between long jump, absolute jump and relative jump. (6.5)
.n i
Q5
and indirect involves an (6.5)
ec
de
Q4
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Q8
Q9
I
Why do you need a cross compiler? (2.5xlO=25) What is the meaning of Task Service functions? Explain Inter Task Communication. What is an embedded system? What is USART? If 8051 operates from a 12MRz crystal what is the duration of machine cycle? For the 80C51, which of the SFRs has set value that is not OOOOR? Ifl:he on chip oscillator frequency for 80C51 is 11.059MHz what would be setting of TH 1 to obtain a baud rate of 960bps with SMOD cleared to O? (i) Name any four bit manipulation instruction in 8051. Ul What is the difference between MOVXand MOVe instructions?
i.a
Q2
(a) (b) (c) (d) (e) (f) (g) (h)
lh
Q1
I
UNIT-IV (al Programe the 8255 for the following:(6.5) (i) .Set PC2 to high (ii) Use PC6 to generate a square (b) Write a program to read 200 bytes of data from PI and save the data in external RAM starting at RAM location 5000H. (6) (a) There is a vertical bar of 4 LEDs showing room temperature during the four states, "very cool", "cool', 'normal' and 'hot'. Draw the interfacing circuit and also write 8051 algorithms for it. . (6) (b) Show the timing diagram for SDA andSCLK signals in an PC bus interface. Show the time slot in which the receiver acknowledgement is expected. (6.5) ************
Exam Roll No
(Please write your Exam Roll No.)
.
END TERM EXAMINATION EIGHTH SEMESTER (B.TECH.) MAy-JUNE 2012
.
IPaper Code: ETEC406
.. . Subject: Consumer Electronics Time: 3 Hours Maximum Marks :75 --Note: Attempt any five question including Q.no.1 which is compulsory. Select one question from each unit (a) What is raster and how is it produced on the picture tube screen? (2.5xlO=25) (b) Why is FM preferred to AM for sound signal transmission? (c) Justify the need for a· blan.king period corresponding to 20 complete lines after each active field of scanning. (d) Why SSB is not used for picture signal transmission? (e) Why is an attenuation slope of O.5MHz allowed at both the edges of the AM picture signal sidebands? (f) What do y~u understand by ~dark currents' in a vidicon? (g) What is a hi-fi system? Explain its features. (h) What is blend control? What is its purpose? How doe.s it work? (i) Derive an expression for maximum useable frequency recorded on cassettes. til What is a crystal microphone? Explain its construction and features.
c. in
Ql
I
i.a
UNIT-I (a) Explain the principle, construction, working, features and applications of a direct radiating loud· speaker. (6) (b) How is audio information stored on a CD retrieved in a CD player? Dmw a simple diagram showing reflection of laser beam from a CD and conversion of information into binary data. . (6.5)
lh
Q2
OR
Q5
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(a) Explain with the help of suitable sketches, how video signal vidicon camera tube? (b) Explain how Sync .pulses are separated from the composite processed to synchronise the vertical and horizontal oscillators?
is developed video
in a (6) signal and (6.5)
UNIT-III (a) Describe Trinitron colour picture tube. Explain why is it considered superior to P.LL. picture tube? (6) (b) What do you understand by 'grey scale trapking'? Explain how it is carried out both for low and high light levels of the video signals? (6.5) OR (a) Define purity and convergence and explain why elaborate static al)d dynamic corrections become necessary to obtain colour purity and coincident rasters? (6) (b) Explain with thehelp of suitable bloc;~ diagr~m the encoding process in the PAL colour system. Why is the colour burst signal transmitted after each scanning line? (6.5)
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Q6
UNIT-II (a) Describe briefly how EHI and boosted B+ voltages are developed from the horizontal output circuit of the s~eep amplifier. (6) (b) Describe with a simple circuit the basic principle of a 'Keyed AGC' system, How does it overcome the shortcomings of a 'non-Keyed' control system? (6.5)
ec
Q4
(a) Explain the following in respect of microphones. Sensitivity, Directivity, SNR, Frequency response, Output Impedance, Distortion. (6) (b) Draw a neat diagram of tape transport mechanism of a tape-recorder and explain its working. (6.5)
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Q3
w
Q7
Q8
UNIT-IV (a) Explain the construction and working of FAX, (b)Write short notes on the following:(i) Plasma TV (ii) LCD TV
(6.5) (6)
OR Q9
(a) With the help of a block diagram explain the working of HDTV. (b) Explain the working and construction of Touch' Tone Telephone Set.
************
(6) (6.5)
(Please write your Exam Roll No.)
\
Exam Roll No
.
END rr}':RlVl EXt\.rVIlf~A'rION 2012~_~ __ ~. .. _ Paper Code:ETEC406 Subject: Consurner ~~4!.ctr~f}!.E~.--, Time: 3 Hours Maximum ~ar.f!.s_~ _ Note: Attempt any five question including-Q--.n-o-.1-w-h-;c-h-is-c-o-mpulsory. Select one i . question from each unit, . . .__._______ EIGHTH SEMESTER [RTECH.j
I
MAy-JUNE
.J
Ql
(a) What is raster and how is it produced on the pictu;e tube screen? (2.5xlO::25) (b) Why is FM preferred to AM for sound signal transmission? (c) Justify the need for a· bia!Jking penod corresponding to 20 complete Ihles after each
active field of scanning. (d) Why SSB is not used for picture 8ig:::12<1 transmission? (e) Why is an attenuation slope of O.5MHz allowed at both the edges of the AM picture
c. in
signal sidebands? (f) What do you understand by 'dark currents' in a vidicon? (g) What is a hi-fi system? Explain its featu;es. (h) What is blend control? What is its purpose? How doe.s it work?
(i)
OJ
Q5
i.a
lh
UNIT-II (al Describe briefly how EHI and boosted B+ voltages are developed from the horizontal output circuit of the s~eep amplifier. (6) (b) Describe with a simple circuit the basic principle of a 'Keyed AGe' system. How does it overcome the shortcomings of a 'non-Keyed' control system? (6.5) . OR (a) Explain with the help of suitable sketches, how video signa! is developed in a vidicon camera tube? (6) (b) Explain how Sync pulses are separated from the composite video signal and processed to synchronise the vertical and horizontal oscillators? (6.5)
VNIT-III (a) Describe Trlnitron colour picture tube. Explain why is !I considered superior to P.I.L. picture tube? (ti) (b) What do you understand by 'grey scale trar;:king'? Explain how it is carried out both for low and high light levels of the video signals? (6.51
w
w
Q6
de
Q4
ec
Q3
)JNIT-I Explain the principle, construction, working, features and applications of a direct radiating loud speaker. (6) (b) How is audio information stored on a CD retrieved in a CD player? Draw a sImple diagram showing reflection of laser beam from a CD and conversion of i:1formation into binary data. OR. (a) Explain the following E~ respect of tmcrophones. Sensitivity, DirectivIty' SNR. Frequency response, Cr..;tput Impedance, Distortion 1.6) (b) Draw a neat diagram of tape transport m,~chanism of a tape-recorder and explam lIS working. (6.5) (a)
.n i
Q2
Derive an expression for maximum useable frequency recorded m; casseUf:" What is a crystal microphone'? Explain its construction and featl:res.
w
Q7
Q8
OR
(a) Define purity and convergence and explain why elaborate static al)d dynamic corrections become necessary to obtain colour purity and coincident rasters? (6) Explain with thehelp of suitable bloq~ diagra:m the encoding process in the PAL colou.r !?ystem. Why is the colour burst signal transmitted after each scanning line') (6,5)
UNIT-IV (a\ Explain the construction and 'V'JOrkingof FAX. (b)Write short notes on the following:· (i) Plasma TV (ii) LCD TV .
OR Q9
(a) With the help of a block diagram explain the working of HDTV. (b) Explain the working and construction of Touch' Tone Telephone Set. **f'r*********
16) (6.5)
Exam Roll No
(Please write your Exam Roll No.)
.
EN"n TERM EXAMINATION EIGHTH SEMESTER [D.TEen.] MAY-JUNE
IPaper Code: ETIT412
2012
Subject: Network Security and_Control Time: 3 Hours Maximum Marks :75 Note: Attempt any five questions. Q.no.1 is compulsory. Select one question from each unit.
Ql
(a) Describe a different Block Ciphers modes'of Operation. (b) Give characteristics
I
(5x5=25~
of Advanced Symmetrical Block Cipher.
(d) What are advantages and disadvantages of operation? (e) What are requirements
c. in
(c)W!lat is Mono-Alphabetic Cipher? Why it is easy to break?
of the output feedback mode
of Public key cryptography?
UNIT-I Distinguish between Stream Cipher and Block Cipher. examples and diagrams to illustrate your answers.
Q3
Explain the Encryption and Decryption technique of DES.
Q4
UNIT-II Explain Diffie-Hellman algorithm. Show exchanging the session key.
de
lh
i.a
Q2
the
use
Use suitable (12.5) (12.5)
of algorithm for (12.5)
Discuss the difference between Digital Signature and Digital Certificate. Also, explain why Digital Signature are used in Public Key Encryption? (12.5)
Q6
What are various algorithm of same.
UNIT-III Signatute
w
Q9
Describe
anyone (12.5)
Illustrate the mechanism of Secure Socket Layer and. Transport Layer Security using suitable diagrams/examples wherever necessary. (12.5)
UNIT-IV State and explain Management Information Model.
w
Q8
Standard?
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Digital
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Q7
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Q5
Describe TMN Information Model.' ************
(12.5) (12.5)
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(Please
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Et~ - J!lll
Ie your Exam Roll No.)
END TE
Exam Roll No •..•••••••.•••••••.••.•
EXAMINATION
Note: Q.1 is compulso
MAY-20l0 Subject: Mobile Communication Maximum Marks: 75 . Attempt one question from each unit.
Explain the effect of scatteri g phenomenon in mobile radio environment. (3) Calculate the Brewster angl for a wave impinging on ground having a permittivity of Ii r ::: 4 . (4) c} d) e} (1) (g) (h)
Q2
Q3
Explain subtracting scheme 'th respect to handoff in Mobile Communication. Distinguish between Drappe calls and terminated calls, Explain the linearity propert of block codes. Obtain the relation for syste capacity in cellular systems using CDMA. Write short note on Gaussi Minimum Shift Keying (GMSK). Specify the technical param ters of D-AMPS mobile communication system,
UNIT-I (a) Obtain the relation for si nal to interference ratio of a 7-cell cluster in cellular architecture. (Assume the s ape of cell is hexagon). (7.5) (b) Explain the advantages an disadvantages of the two-ray ground reflection model in the analysis of path loss. (5)
i h l e
C g in
UNIT-II s of antenna structures used for cell coverage in cellular s. (6) channel assignment schemes to ma .••. lage the call flow in a tion environment. (6.5)
r e e n i g n E
Q4
(a) Discuss about the featur architecture based syste (b) Explain various non-fixed typical Mobile Communic
Q5
(a) Explain the following han -off schemes:(i) Mobile Controlled H doff (ii) Network Controlled H ndoff (iii) Mobile Assisted Han off (b) What is Fraunhofer dist nee? How it influences distance propagation?
rn e h t r o
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Q7
Q
Q
D w Ne
(a) Explain the following m thods to improve coverage and capacity in cellular systems:(8.5) (i) Cell splitting (ii) Cell ectoring (b) Explain the following out oor propagation models used for radio transmission in Mobile Communication Sy tem:(4) (i) oKUMURA Model (ii) HATAModel
, e g e l l o
Q6
(3) (3) (3) (3) (3) (3)
ia d In
(6)
to find the coverage area of long (6.5)
UNIT-III (a) What is Hamming dist ce and Hamming weight? Explain from first principles how a (15, 11) Hamming cod can be used to detect and correct single random error. (8.5) (b) Write a short note on co catenated Turbo Codes. (4)
(a) Explain how Orthogm ity and Autocorrelation properties are helpful in designing the spreading sequence without interference in CDMA systems. (7.5) (b) Write a short note on onvolutional codes and explain how these codes differ from block codes. (5) UNIT-IV (a) Explain the mobility m nagement in GSM (Global System for Mobile) network. What are the logical channel used for handling mobility? (7.5) (b) Write a short note on OCODERS. (5) (a) What is IS95CDMA N twork? How it is different from its competing TDMA based GSM technology? (8) (b) What is soft handoff? xplain the handoff performance in CDMA systems. (4.5) ************
(Pleas write your Exam Roll No.)
Exam Roll No ....•........•.........
M EXAMINATION PaperCode:ETEC404 Time: 3 Hours
[~---=_--------N-o-te-:-A-tt--e-m-rp-t- any five Q1
Give the similarities and
issimilarities of the following terms:-
(a) Embedded system an
Personal computer
(5x5=25)
(b) Locator and Linker (c) Scheduling algorithm
in OS and RTOS
(d) 12C and USB (c) Counter programming and Timer programming.
i h l e
Q2
What are the different knds of processors used for Embedded Systems and explain the 8051 arc itecture with the detail blocks diagram. (8+2)
Q3
What is the role of two ommunication Protocols in embedded systems and write a short note on any two Protocols that are used with 8051? (2+4+4)
Q4
Define RTOS and how 't is different from OS? How do you handle interrupts in RTOS and e plain at least two techniques? (2+2+6)
Q5
Explain with the blocks iagram interfacing of 8255 and DAC with 8051 along with its application (5+5)
, e lleg
o C g
Q6
n i r e e in g En
Problem and explain?
ia d In
(b) Explain the different along with examples.
ern
Q7
h t r o
N
D w e N
(5)
ddressing modes that are supported with 8051
Write short notes on an
(5) (5+5)
(a) Interrupts priority in
(b) Embedded Systems T (c) Write a program to ge erate the square wave at port PO.O. ************
.
Exam Roll No
(PI use write your Exam Roll No.)
.
RM EXAMINATION EIG THSEMESTER B.TECH.
MAY-2010
Subject: Consumer Electronics Maximum Maries :75 ----~--- ----------~ question from each unit Q.1 is compulsory.
Q
(a) Explain the advan
ges of stereophonic system.
(5x5=25)
(b) What are the differ nces between standard color TV and HD TV? (c) What is the need
d effects of different sync and blanking pulses?
(d)What are the differ nt noise reduction techniques? (e) What are the pros
Q
d cons of microwave oven?
UNIT-I (a) Why do we use ste eophonic system while quadraphonic systems are available? Explain. (6.5) (b)What are the frequ ncy ranges used in graphic equalizer and why? (6)
i h l e
OR
D w Ne
(a) What makes a P system Hi-Fi and what are the features of a synthesizer? (6.5) (b) What are the diff
e, g lle
Q
o C g
UNIT-II (a) Explain the detail orking of PALcolor TV receiver. (8) (b) Relate the head ga , tape speed and maximum recordable frequency in VCR. (4.5) OR (a) Explain the Worki g of VCR. (8) (b) What are the ad antages and disadvantages of different memory devices? (4.5)
rn e h t r o Q
N
Q
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n i r e e in g En
UNIT-III (a) Differentiate amon Cross-bar and Electronics Exchange. (8) (b) What is the need of telephone message recording and how is it achieved? (4.5) OR (a) Explain various fe tures of remix controlled systems. (8) (b) What is the digital ecording system, explain? (4.5)
UNIT-IV (a) Explain a circuit/ lock diagram for movement control in electronics toys. (8) (b)Write notes on elec onics circuit used in refrigerators. (4.5) OR (a) Explain the workin of Microwave Oven with detailed block diagram. (8) (b) Write notes on elec ronies circuit used in washing machines. (4.5) ************
