TRIBHUVAN UNIVERSITY
j:
INSTITUTE OF ENGINEERING
Examination Control Division
2080 Baishakh
BE
..f_qli.i-ptil" "."lii
S ubject."
'/
{
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Leyel
--T6'
FuII Marta
'
Pra,o"rrrrrre BEL,
RtrI BEX,
Rtr\a E!.-r
r,
ji Programme
p*u, fVfurf,,
BCT n^'
:l:
I
- Instrumentation
II
-
i_i"
fi*;-
-
j h;, -i
GX 602)
candidates are required to give their answers in trreir ou,'tt wordq :lq fqr
Anempt All questions,.
Thefigures in the ntargin inclicate Full Marks.
Assume suitable data i/'necessan,.
oo
practicable.
@rucm
LIBRARY
1. a) Describe the various pC inlerlacing technieiues while interfacing
anUA
b) Draw circuit diagram of an interfacing circuit controlling one 4KB
4Kts ROM assuming base address 4000H.
devices.
RAM ancl
t3l
one
i{l
A
microprocessor kit has an onbcard 8255. Interibce to
the g255 eight single-poledoublethrow (SPDT) sw'itches numbereci Si; 1o 57 anci zr
seven segment comrnon ano6e
LED display' Draw the cornplete circLrit setup. neljne ciearJy
the-functions of all p.rts.
write a program to initialize 82-55. Detect a ir,r,itch closure ar:d
tlisplay the
of the
switch number on the l,ED display.
'alue
3.
4.
5.
a) Iliustrate digitai data transmission using moelem and stanciard phone li,es.
b) Explain check surn error iretection technique v,,ith suitable example"
a)
b)
F]
l4l
architecture rvith suitable block diagram.
'fak about inductive coripling
in short,
Explain Ground Loop mechanism
issues with suitable diagram.
an<tr
fair design.
L4j
ral
LIJ
also discuss the elimination of the grounci loop
' Any circuit design rnusl be capable to provide the high speed and iow power
perfonnance'
t4l
Discuss various terminologies in detail to achieve the
aborre witnesses in
What are the general rules for piacement of components
in a circuit? L)escribe grounding
in terms of circuit lavout.
What do you mean by software reiiability? htxplain prototyping
model for software
development.
10'
lel
i
diagram.
b) Explain Bluetooth protocor
9.
L"l
i4l
why do r've need cligitai to analog conversion? Design an interfacing
circuit tliagram lor
an 8 bit ADC using srarus check. Explain it rvith the
zuitable flowchai ,; p;;**
[2+rrj
a) what are the components used in l)ata Acquisition system? Explain with
necessar'
block
7
-l
.what have you leamed from case study? Draw the cornplete block diagram of the
industrial process control invoh,ed in your case stuclv. what
are the critical factors
effecting the production 5iou have noticed in the visited industry
anci what measure ,vou
can suggest for the same? What problems you might face
after impleiaenting 3rour
suggested process control system?
{<**
t6l
{4+2)
[2+ 6]
[12]
TzuBHUVAN LINIVERSITY
INSTITUTE OF ENGINEERING
Full
Marks
Examination Control Division
Pass
Marks
2fi79 Bhadra
Time
80
Subject: - Instrumentation II (EX 602)
"/
,/
,/
,/
Candidates are required to girre their answers in their or.vn r.vorcis as tar as practicable.
Alternpt ._4ll questions.
Jigure.s in tke margin indicute FU$ Warks
Assume s,uitable ddto if'nec:e .tsary.
T'he
k-
i. a) Define a microprocessor
'trased instrr-rrucntation systenr.
loop and c,losed loop microprocessor based
b)
2.
l)escribe dircct memorv
Diflcrentiate between open
insrrumcnration.
access.
l1+4j
[3]
Design an interfacing circr"rit to set up bidirectional data conrr:rluricatii;n in the masterslave format between two 80854 microcompLiiers. LIse the 8255A as the interfacing
between the master and the slave micrcloomputers. What r,r,ill be the port addresses ancl
control rvord" Write necessary program to transl'er a block data ftom the master to the
slal,e along with its flow'chart diagram"
t10]
3. a) Explain
how comn.runication takes place betu'een PC (DB9 por-t) and printer (DB 25
port) using Null modern ccnnectiou.
b)
4.
5.
6.
7.
8.
What are conlrnon USB packet field? h.xpiain difltrent I ISII
packets.
Interface a suitable DAC using 825,5 PPI to an 8085 microprocessor to generate a square
wave oscillating betr,veen 0V and 5V having a frequency of 1 KI{2. Describe the
interfacing circuit along with the necessarv prograrn.
l4l
li*i
I
i8]
I.ist the characteristics of Bluetooth. Explain the conrponents of data logger with the help
of block diagram.
[2+61
Describe any three mechanisms of noise coupiing. Irxplain briefly on prevention of noise
coupling.
13+31
Write an importance of decoupling, ground bounce, cross talk and impendence matching
in designing circuit.
L6l
S'hat are the diflerent types of bc.arcls for electronics prototl'ping? List out each circuit
I'\ L^-l
LL'1}
boards characteristics.
9. Explain about Embedded and Real Tirne Sofiivare used to run and controi various modern
instruments. As an instrumentation engineer, ciiscuss the diflerent apprcraches of'coupling
and cohesion techniclue to definc tasks arrd dcsign an integrated
rnodule.
study is relate,d to the basic rneasLrroment requiremcnts. accuacy and specific
hardware emplcyed envirortmental conditions under rvhich the instmments must operate.
signal processing, tlartsmission and output devices. Regarding )'ollr case stud_v visit; drat,
a biock diagram of the existing control system and meniion thc problerns lound in the
existing system. You siroulci also draw' an interfacing diagram for soiving the problem
with discussing merits and denterits of -v<iur recommended s-vstem in terms of cost.
manpower and piant automation.
16l
10. Case
:i.,ir +
Il2l
t
TBIBHUVAN LNIVER.SITY
INSTITUTE OF ENGINEERING
Exarnination Control Division
2078 Bhadra
Fyfirr:!
Ex*m.
Level
Itt'gulai
BE
Full Marks
80
Programme BEL, BBX, BCT Pass Marks
Year / Part
Time
32
m/i
- Instnrmertation
II
3 hrs,
(EX 602)
Candidates are required to give their answers in their or+,n words as far as practicable.
Attempt 4ll questions.
Tlte figures in tl.te margin indicate {$tl il{{gks.
Assutne suitctble data if necessary.
1'
2.
Define instrutnentation system. Compare status check I/O, Interrupt driven VO and DMA.
[2
Design an interiacing circ.uit to set up bidirectionai data communication in the masterslave fcrrmat betweelt tu'o 80854 microcomputers. Use the 8255A as the interfacing
betrveen the master and the slave microcomputers. What will be the port addresses and
control n-ord' Write neoessary program tc transfer a block of d.ata from the master to the
slave along w.ith its ilowchart diagraln.
3. a) Explain simplex, half duplex and full riuplex operation of RS-232 seriai standard.
b)
4.
Describe different types of USB proiocols along with the corrunon USB packet fieids.
Explain the principle in',zolved u'hile intertacing an 8-bit ADC using intenupt; inclu,Jing
suitable bltck diagrarn. process ilcu'diagram and necessary ALp subroutine.
5. List tlie major characteristics of Bluetooth.
system and explain eaoh biock.
6'
Explain the principle
of
remeclies.
7. Discitss and differentiate
purpose r:f circuit design.
r-6]
tel
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t6l
t8I
Draw the hlock diagram of data acquisition
[3+5]
energy coupling. Describe about capacitive coupling with
l6l
betrveen different types of fault tolerance schemes used in the
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8.
Explain ground, returns and shields in the context of circuit layout.
9.
a) Draw the complete block diagram for prototype model in softwme
process and explain its component in brief,
b)
t6l
development
Write about White box testing and Black box testing.
10. Draw the complete block diagram of industrial process controi system
involved in your
case study. Explain why you want to irnplement this control system over
existing one in
terms of cost, maripower and plant automation. What probllms you might
faie after
implementing this control system.
***
t4l
i3I
1121
TRIBHUVAN IiNIVERSITY
Exam.
INSTITUTE OF ENGINEERING
Examination Control Division
?078
Kartik
Level
tsE
FulI Marks
80
Programme
Year / Fart
BEL, BEX, BCT
Marks
Time
3Z
mlr
Pass
3 hrs.
Sypjgct: : Iffl*rmenration II (EX 602)
'/
{
,/
{
candidates are required to give their answers in their own
All questions.
Thefigures in the margin indicate ull Marks.
Asswne suitable data if necessory.
1'
e.) Whr:t is the rationale behind using a rnicropiocessoi in instrumentation systems?
Ileserii:e twcl silrmtirjns r,vh,:rc an open-loop Mtsl system performs better riian
a
closed-lnop lBl s3,'s1gm" lllir:;ii'atir:g your answer with illoc,k diagrarns.
Attempt
b]
2.
h$ffiR&RY
Describe the DMa active and idle cycles wirh appropriate figures" proyide
at least
fir'* disadvantages of using DMA controllers,
Drar'v the circr-iit diagram to interiace 8255A PPI with g0g5 microprocessor
at base
address B0I{' Write.afl assembl,v pr,.rgrain that determines the addition
r:f contcnts of port
A and port B and display the resuii iir pr:rt C. Use apprr:priate control word to initialize
the 82554.
3' a) Llefine bit rate and baud rate. Determine a character transmissicrn rate using
i1.+3]
L2rz}
[3+5j
as1'nchronr:tls seriai data transfer method at Lraud late 9600.
Suppose a character has
? bits data. cre bit start trit" two hiis stcp liit and none parity". Calculate
the time
required to senri a \v61.q1. Engineer.
b)
4'
i5]
Describe the problems c*cur ',r'hen you try to connect RS-232
devices that b.th are
configured as DTE. Hovi tiris probii?m can be resolved?
\&/hat are the pararneters
with 8085 microprocessor using 82554
ppl.
5' a) Drarv the block diagran'l of a digital transrnission system that can be used to transniit
analog as r'l'ell as digitai data. Llr:mpare and contrast anaiog
and digitai iranslnissicn
iechniques v,,irh at ieast five <listinguishing characteristics.
b)
6"
'
8'
7
9'
.Desigfl a data logging and storage system that is capable
of receiving and sturing
signals flom optical fibers, sa.tellites antl Bluetooth tlevices. provide
the block
diagram of the overall system, whicir should shr.rrai how messages
get transmitted over
the three transrnission sciremes and how the logger receives
them.
How ground l.op can be prevented? Explain the Electromagnetic
coupiing.
Explain ground bounce, decoupling ancl crosstalk in the context
of circuit design.
\\hat are the fhctors that need to be consi,Jered while routing the signai
traces in circui,i
layout. How da you avoid crosstalk whiie making lay.out
of the circuil?
s/itat are the diflerent phases of bugs in software
types of"techniqucs used frrr software
10' Draw the cornplete
I5l
to characterize ADcs? Design a circuit tg interface ADCgggg
testing.
I
p+6J
[2 i-2
i
t4]
i6l
tfr,
LZ+41
--.
der,,elopment? Explain the different
blcck diagram of.industrial process controi system involved your
in
case study' Explain *'hy you want to irnplement your
control s1'stlm over existing one in
terms of cost, manpowef, and plant automationz wt
at probllms y*u *igrrt face after
implementing this control systenr? What are the benefits
oi.n*,, system over otA oneZ
*+*
[3+5]
tl12l
TRIBHUVAN TJNIVERSITY
rNbrrutp oF ENcINEERING
Examination Control Division
2076 Chaitra
.'
- Instrumentation 1l (EX 6A2)
i
*'ords as far
Canciiilates are required to give their answers in their oll'n
Attempt
+
::ik*,.
as
AII questittns,
Murlis'
figures in tlte margin indicate Fuli
Assunte suitable data if necessary.
Tlze
belrveen
Explain the basic rnodes of data transftr iechniques available
and peripheral devices.
b) N{eruion the features of Microprocessor Based Instrumentation system'
and Port B as the
Port A is to design as the input for a keytroard in intenupt driven VO
as
microprocessoi
8085
with
output for a printer in status iheck I/O using mode i of 8255
shorvit below:
a) 'Irind poft addresses by analyzing decoding logic'
bj netermine the coitrol word to set up port A as input and port B as output.
c) Determine the BSR word to enable INTEA'
b$e to veriS the OBFa line'
dj Deterrnine the masking"urri
u read and write subroutines to accept characters from
prcgrarn
main
1. a)
2.
"j
t5l
t?1
t-"
_!
iel
\\rr.it"
keyboard and to send them to Print.
+5V
GMT'A,
Data,
Bus
From Peripheral
pC+
Au
PC:
pCr
Ao
.
A1
A.o
From Keyboard
Port A
PAo
To Peripheral
rsirn"
OBFn
PCr
,ACKg
8085 intemrpt (RST 6.5)
To Prirrier
From Printer
16f,
4
row
To Parallcl
Printer
ITE.SEI
GUt.
3.
Iixpiain the Null modem u'ith and rvithoui haldshaking mechalisin.
b) Iixplain Cyclic Redundzurcy Code with suitable exa:npie'
a)
i5j
t1l
4. Design the inierfacir,g of i408 DAC rvith an cutput poi't of address AF H for 0v to 10v
.
range. Note ihat take appropriate values for resistors and
capacitors.
t8]
5. a) Holr, can ]'ou
design the cornmunication system. *'ith satellite as an unguided
tralsmission scheme?
Expiain tiie I)ata Acquisition sl'stem with the help of compact data loggcr.
i4l
Explain different types of fiitering rnechanisms used to reduce conductive noise coupling
on the basis of lrequency, mode arrd amplitude.
t6l
Define ground bounce and crosstaik in circuit design. List their reduction r,vays.
t6l
b)
6.
7.
8.
Describe tire differenl terminologies used
commercial circuit layout.
9. Exp)ain spiral softrvare development
Descrit,e cohesion and
coupling.
in routing signal traces for
designing a
c)
t6]
model rvith its advantages and disadvantages.
[5+3]
following questions with regard to yorir case sludy.
Describe the existing work flow'mechanism of tire industr"ial instrumentation system.
What are the critical tbctors affecting the production of existing slrstem and what
nleaslrres you can recommend for mitigating those factors?
Design a proposed system using microprocessor/ microcontrolier, input/ output
10. Ansrver the
a)
b)
t4l
devices, interfacing process, communication protocols, data converters and handshake
signals with neatly iabeled block diagram.
d) List out the different advantages of the proposed plan in terms of
technology,
prcduction rate, quality assurance, cost-benefit and return on investment (ROI).
***
U21
I
I
TRIBHWA}TUNTVERSITY
INSTITI.ITE OF ENGINEERING
Examination Control Division
2076 Ashwin
'' -f iOGk :.;', -t.,-
Exam.
.l,l;;'.
Level
BE
Full llfarks
80
Programme
Year / Part
BEL, BEX, BCr
-Pass
Marks
3?
m/r
Time
Subiecl: - Instrumentation II
...,:.:.'"
.i.''",r:.1.1;a
3 hrs.
(EX 602)
words as far as
Candidates are required tb give their ansrvers in their own
l.t t e mpt A, t I q u e s t iottsThefigures in the margin indicate lnll Udlcx
Assame suitable data
if necxsary-
ffiffifqlffi\,#i$
."1:
!
i
i
I
1.
a)
b)
Explain microprocessor based instnrmentation system
with its block diagram.
-,&'^l
tsl
processor.
t3I
List out the factors to be consider while selecfing a
in{igure
An g255A ppl card is connected to 8085 microprocessor has systern as shown
Ll+3+2+2+21
below in which contol word is stored in address of
F3H.
:
a) What are the addresses captured by 8255A PPI card?
b) Drlw the minimum interfacing circuit.
c) write down the control word to initialize the 8255A FPi card.
-word format for 8255A PPI card for the system.
d) Write down the status
requeste) Write down BSR conhol rvord to initialize port A intemlpt
INTERRUPT
REOUEST
PCi tic.
FAT
PA2
PA3
PA4
R2
R3
RE
FULLY
DEcoDED
KEYBOARD
R5
PA6
PA?
r
SI{IFT
P0'{
FCs
E2c55A
m0
BO
PBI
B1
82
83
84
BURRogcHs
SEI-F-SCAN
DlsPtAY
B5
BACKSPACE
CLEAR
OATA READY
ACK
BrSNXlH6
CANCEL WORC
INTERRUPT
REOUEST
of RS- 232-C in serial communication? Explain the RS 232-C
[1+4]
working prirrciite with its differcrrr types of
3. a) trfu,hat is the irirportance
signals.
b) What is USB? Explain its cornmon packet fields'
illustrations
4. a) Describe INt and DNL error of data converter with necessary
8 bit ADC with 8085
b) with necessary diagranr, r.xr.rain interfacing of 8 chanrrel
mic-roprocc#
J;6;til
timing
5. a) Discuss ana]og commuaication
diagrasr
u'ith
system and digital communication system
U+31
[4]
tsi
an
t4I
apProPtiate block diagram'
b)
Differentiate between piconet and scatternet
Mention the characteristics of Bluetooth.
neturork topology used in Bluetooth
environment
6.a)Whatwillhappeu-totheelectoniccircuitconnectedinsinglepointgrountlsystem
UfUt Explain with"necessary illusbation'
when operated in frequen.y gr*ut.ith* t
b)
t4l
:
What
used to suppress the banSient current"
Explain how decorrpling capacitor can be
your
in
connertr:'d
is
decouplin-f capacitor
ef[ects do you obs.rue *,hen very large
[3+2]
eircuit?
ll+21
7.a)Whatisreliabitity?Listouttlrefactoraffectingreliability.
b)
t3l
while designing higbsp€ed
What are the factors that need to be considered
S..HowdoyoureducecrosstalkwhenroutingsignaltracesonaPCB?
softwafe' How &ese bugs cau
iig. Explain different types of software bugs that might "Yt i"
i;]' ilffi;-d;*rr1Ji*prrrnenring diffeient tlpes of software testing"
trxlY with
' ''
nnntrnl svstem invo
involved m. fur
:ilt:0.
fxplain existing industrial_process control system
-:
for the
aecossarJr
t!a1 fou deem
th,
necessary block diagram. n
"iru,,gt*
should
,,.,, improvement of oierali .system peirg**.g.lp*nrrio
h'nut.rit tU. pt"Uable probleins yori might face after
*'', implement these
"t*g.r.
implementation of yo*iecommended system?
t3l
t4I
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*
,,'
"o**A
*trv
112I
TRIBHUVAN TINIVERSITY
Full Marks j 80
INSTITUTE OF ENGINEERING
Examination Control Division
IIi
Year / Part
2075 Chaitra
Subject: - lnstrumentation
Candidates are required to give their answers in their
Attempt All questions.
Thefigures in the margin indicare
Assume suitable data dnecessary.
full
lI
I
I
tme
J
nl-s.
(EX 602)
oun
rvrrr<is as far as practicabie.
Marks-
"&
a)
b)
1.
Z.
Define closed loop MBI system with suitable example-
l2l
Among full or partial address decoding, which method of address decoding do you
choose while interfacing memory device? Give reasons with suitable example.
Interface a parallel bus centronics,printer with 8085 rnicroprocessor using 82554 in mode
1
output configuration.
a)
Draw the
.ry
ne'cesSar y
interfacing circuit required for this purpose using 8255 PPI id
t3l
t2l
handshake mode.
Determine port address as per your chip select logic'
b)
c) Determine the confrol word required for printing operation.
d) Draw the timing waveform for transfbrring data to the printer.
.j
3. a)
b)
4. a)
b)
5.
6.
7.
t4l
121
121
Write an ALP to print characters rvhose ASCII code is available in memory location
from 9000H.
Explain the transferring of serial data using asynchronous transfer. One character is
formed with 7-bit ASCII code, 1-bit start, 2-bit stop and 1-bit parity.
[3]
t4l
standards. Differentiate different USB data transfer
mechanisms with suitable example of each'
Explain the interfacing technique of 12-bit DAC to B-bit Data bus.
l6l
Explain different types of errors in ADC & DAC'
t4l
Describe
up to date USB
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Explain Bluetooth network topology in detail. Why optical fiber has high demand in the
14+2)
field of communication.
Explain different types of Energy coupling rnechanisms w'ith suitable example of each.
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How can a circuit be protected from ESD?
What do you mean by reliability in a circuit design? Discuss horv the reliablity can be
t6l
achieved by incorporating fault tolerance-
8. a) What is PCB? Write dorvn the advantages of PCB'
b) Ho'*. do you reduce cross talk when routing signal traces on a PCB?
g. Define roll back recovery with suitable example. Explain the spiral
development cYcle.
[1+2]
t3l
model softu'are
l2+41
l0- Explain your industrial visit carried out on your case study in terms of existing system
circumstalces, problem identihcation and analysis, recommendation plan, requiremenl
lisr
and feasibility analysis of the recommended plan and rollback plzrn if necessary. Also
rate,
production
technology.
terms
of
pian
in
proposed
outthe diflerent advantages of the
cluality assurance, cost-benelht and rcturn on invcstrnent (Rol) lbr the particular industr.v- 112)
.*1
,t
13
l
I'i
TRIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division Programme i BEL, BEX, BCT
Year/Part iIII/I
-?HlAplsi:
S ubi e ct : - Itttlq*9ltqtio{I_ (H!92
practicable'
Candipates are required to give their answers in their own words as far as
Anen{pt All questions.
Thef.gures in the margin indicste Full Marks.
Assume suitable data if necessory.
What do you mean by interfacing? A RAM chip of 512 bytes is given for interfacing
with B0g5 microprocessor systeri. Design an address decoding hardware for the same. [1+3]
b) What is an intemrpt driven data uansfer? Explain the operation of intemrpt driven
sequence. [1+5]
data transfer with flowchart of intemrpt subrouiine and main prograillme
the end of
2. AID converter requires signal to start the conversion and indicates with
conversion signal. 8255t PPI is interfaced with 8085 microprocessors at 80H.
Microprocessor reads 8-bits OIP data of the ADC at port A and display the same data to
eight iED's connected at port B of 8255A. State any assumptions made.
1.
a)
tu
a) Identify the address captured by the cmd
b) Determine the necessary control words
c) Draw the schematic interfacing circuit
d) Write a program to perform the operation
3. a) What is the importance of RS232-C in serial communication?
tzt
t21
t3l
Determine the time
required to transmit a string: "Life is beautiful." using asynchronorrs serial data
transfer method in baud rate of 4800 Baud. Suppose a character has 7 bits data, one
[2+4]
p*ity
bit start bit, one bit stop bit and one bit
"nett
tU
b) Differentiate between USB 1.0 and USB
ALP to
Interface a l0-bit DAC with 8255 PPI and 8085 CPU rurudngat2 MHz. Write an
The
circuit.
generate a triangular wave of frequency 500 Hz using the same interfacing
t8l
i*ptitoar of thJtriangular wave should be
bit.
2.0.
4.
+5V.
5. a) ,In satellite
corlmunication the uplink frequency and downlink frequency
are
[1+3]
different.' Why? Explain the Bluetooth network topology,
the
describe
diagram
block
the
With
b) Compare data archiving and data storage.
[1+4]
characteristics of data logger.
6. Explain different types of filtering based on frequency, mode (common and differential)
t6l
and amplitude (surgl suppression).
7. While selecting a processor for an embedded system product, you have to specifr the
performanc", nu*6", of peripherals functions, memory and tool support to determine the
appropriate processor for the product. As a system designer, prwide a technical
t6l
each of these factors required to achieve the proper funetional design'
"rpt*utioofor
g. What are general guidelines to avoid the crosstalk while routing signal traces on Printed
14+21
Circuit Board? Wliat are the problems due to impedance mismatch?
g. what is software reliability?
compare waterfall and prototyping model. Describe
Ernbedded and Real Time Software.
10. Answer the
a)
'
[2+3+3]
following questio.ns with regard to your case study.
Design a proposed system using microprocessor/microcontroller inputloutput devices,
interfacirrg pio"esr, tommunication protocols, data converters and handshake signals
with neatly labeled block diagram.
that mieht occur after implementing the
t6l
13
TRIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division
2074 Chaitta
Subiect: - Instrumentation tI lE4!9?)
Z Ca"did;6ffi;ediied
{
,/
'/
Attempt All questionsThefigures in the margin tndicate Full Marks.
Assume suitable dota if necessary.
1. a)
b)
2.
a
J.
Describe various well-known techniques while interfacing an IIO device with a
personnel comPuter sYstem.
Differentiate I/O maPPed VO and memory mapped I/O with suitable examples. How
can you generate I/O maPPed and memory mapped signals using IOA4, RD and WR
signals?
t3l
tsl
Explain the different schemes of parallel data transfer with suitable timing diagram'
[4+4]
Explain the functional block diagram of 82554 PPI with neat diagram
a)
bj
4.
to give their answers in their own words as far as practicable.
Describe the various error detection techniques used in serial data transmission.
Explain the functions of USB Host, USB Hub and USB Device. Discuss different
packets used in USB Protocol.
t3l
t5l
S&at are the different types dynamic errors in ADC and DAC? What will be the control
wor6 for interfacing as shown figure below? Also write the subroutine program to read
[4+61
the digital data from ADC.
CI.K lftt
il'S
Vinl+;
rfint_l
AG$IS
Vreff;Z
,ilI
GNTI
itNTfi
5.
Expiain the advantages of optical fiber over copper wire? Explain each block of data
logger.
12+61
5.
a) Wirat are the different noise coupling mechanism?
b) I{ow'canyou reduce the conductive noise coupling? Explain in detail.
7.
\V[at are general approaclres of establishing requirements for circuit design? What are the
[4+2]
two factors that drive reliability of a product?
8.
q
Poor circuit layout and signal propagating principle may cause many problems in the
circuit operation, manufacturing ease and probability of design elrors. What factors will
yo.t consider while routing the signal traces on PCB.
t3l
t3l
t6]
Expiain Prototyping Model for software developrnerit in brief. Explain different phases of
[3+5]
inti'oduction of bugs in software.
i0. Describe the different processing plants that you have studied in case study. With neat
further improvement of these plants can
tt
22 .
Tft.IBHUVAN UNIVERSITY
Full Marks
INSTITUTE OF ENGINEERING
Examination Control Division
':.*
;'"
BEL, BEX, BCT
m
2074 Ashwin
i"i-^
80
32
***-
Sabject: - Instrumentation U (EX602)
r'
'/
{
,/
(l)
Ifthe
Candidates are required to give their answers in their own words as far as practicable.
Attempt 4!!qwestions.
Thefigures in tlte margin indicate F.gE Marks.
Assume suitable data if necessary.
spoeds
ofllO
dEvices do not match the speed ofthe microprocessor, what types ofdata transfer techniques are
with necessary block diagrams and control
signals.
used? Describe them
Q\
t6I
A microprocessor kit has an onboard 8255. Interface to the 8255 eight single-pole-double-throw (SPDT) switches
numbered S0 to S? and a seven segment common anode LED display. Draw the complete circuit setup. Define
clearly the functions of al! ports, write a program to initialize 8255, detect a switch closure, and display the value of
the switch number on the LED
display.
{8} '
-) (a) Explain the design of a USB to RS-232 adapter with the aid of a neat circuit diagranr, appropriate voltige translation
'\--/ - chips, andnecesiary handshakelcontrol signals.
t6]
(b)
What is the time required for transmission of a charaoter with one start bit, seven data bits, one parity bit, and one
stop bit with 1200
(4)
baud?
The data converter that is being used in your project is suffering from differontial nonlinearity and harmonic
distortion. Instead ofpurchasing a new converter, you are required to use the defertive converter. Discuss technical
measrres that can be implemented to mitigate the aforementioned
(5)
I2l
enors.
t6l
Sigrrals from ttree different transducsrs need to be recorded in a data togger. The analog signals supplied by the three
transducers are dual polarity (- 50 mV to 50 mV) having frequencies of 5 KHa l0 KHz and 15 KHz Explain the
design ofthe following stages of the data logger:
signals
(a)
Input scanner stage of the data logger such that it can appropriately sample the incoming
(b)
signah
ADC u)cu
lrr)rss the
rrrs ua,o
data rvg'cr
logger cvvePrr
accepts only
urrr)' positive
used inside
Signal conditioner stage if the 8-bit A,v
Pvrs*J'Srrsrr
Pvrr'Y! polarity
t3l
fanglngfrOm0VoltStOsvOltS.
t3]
(6) Explain the mechanism of filtering line noise with the aid of chokes. How does a choke differentiate bctween
signal that it needs to pass and the noise that it needs to srrppress? Describe the circumstances where chokes
prefened over othernoise filtering
-,)
approaches.
During circuit design proc€ss, what are some general technical^dilemmas
the
are
t8]
P*uO
UV engineers? Explain how
an
engineer can anive at an optimal solution given the requirements of a customer?
(8) (a)
In
a
tSl
multi-layer PCB, describe how grounding is performed and how coupling amongst the layers is
minimized.
t4l
(b) A faulty computer srotherboard has severe clock jitter. The crystal producing the clock pulses is functioning
properly, but clock signals arriving at various motherboard chips suffer from jitter, Dlscuss the source of the problem
and provide some
(9) (a)
O)
(10)
remedies.
t4l
Discuss the shortcomings of existing soft\a,are development models, and suggest m€asures to overcome
them.
The testing tim€ fdr software cannot be too long yet software needs to be thoroughly tested before
commercialized. Explain how this paradox is overcome in a real'world software development
it
I5l
can be
environment.
tS]
Answer the following questions with regard to your ca.se study:
(a) Discuss the main architectural differences between the existing system and the proposed system.
{21
(b) Does your proposed system use a microcontroller or a microprocessor? Justiff your choice, and make a neatly [3]
labeled block diagram of your proposed system.
(c)
In your proposed s),stem, explain in detail the interfacing process of peripheral deviQes with the microcontroller or [5J
miooprocessor in terms of data format, data rate, data converters, communication protocols, timing diagrams, and
handshaking signals,
(d) List the technical
drawbaclcs present in your proposed design.
12l
,
TRIBHUVAN UNIVERSITY
INSTTTUTE OF ENGINEERING
Examination Control Division
2073 Shrawan
Subiect: - Insffumentation II
l4M
Full Marks i
80
Timc
3
1
hrs._i
-
own words as far as practicable'
Candidates are required to give their answers in their
Anempt AUquestians-
fnriy"Tes in the margin.indicate Full Marks'
Assume suitable data if necessary'
t3l
instrumentation system.
a) Explain the features of microprocessor based
b) Differentiate between open
-F--'loop and closed loop instrumentation system along with
blockdiagrams.
2.
based instrumentation
Assume that your group has decided to make microprocessor
address 5000H in
base
at
system for an tce 6ream Factory using an 8255 PPI card
*r*ory mapped I/O mode for controlling Purpose. You need to measure pressure and
t1+1+2+2+41
ternperature of a manufacturing plant.
i) List out the collected documents and components'
ii firt out different signals you need to derive and or can be directly
iii)
ivj
v)
3.
a)
connected to your
interfacing circuit.
Draw minimum mapping circuit for above system
control word for the
Wirat are the addresses-captured by your card? Generate the
system
Write a pro$am module for measuring temperature and control
not in the range. Assume suitable data if necessary'
if
the temperature is
over longer distance and
Explairr why system that uses the RS 422A cantransmit data
at higher baud rate than Rs 232C and RS 4234'
of communication on the USB data Bus is a packet'
l4l
Discuss various types of packets used in USB protocol'
t4l
b) The fundamental elements
4.
5.
a)
criteria for
Why analog signal needs to be converted to digital? What are the selection
selecting ADC?
b) What are the characteristics of ADC and DAC?
write the application
a) what is spread spectrum frequency hopping in Bluetooth?
of
what is data iogger? Explain the operation of data logger along with its block
diagram.
mechanism
How inductive noise is introduced in electronic system? Discuss the shielding
il;;";;;
12+21
t4l
Bluetooth.
b)
6.
t5l
couplfng.
be the
t. Establishing requirements is the most difficult part of circuit design' What could
basic tips-and'thoughts for setting requirements towards selecting the appropriate
technology which heli you to achieve u r.J* circuit design?
[1+2]
I5l
[3+3]
t6l
".t
8.
Write about the factors we should consider while doing component placement. Explaiir
the role of grounding and shielding to reduce noise in
9"
PCB.
The essential components of software deveiopment interact in different ways in different
process models which helps to plan the development of a project and estirnate the effort
for it. Describe different types of software models used in Software Development
platform. Also mention the merits and demerits of each model.
[3+3]
t8l
dwing your c.rse study? Why do
you think that the management should implement these ehanges? Asstrme ttrat you have a
senior reporting engineer closely looking at work from the system development level,
apart from convincing the management tearn at the visited industry to implement new
10. What changes do you recommend in the visited industry
you also need to convince the senior engineer technically so that your
recommendations will be implemented. How do you want to achieve this technically?
system,
Debate on your technical design to replace the current system and also relate probable
problems you might face after system implementation.
'F*
*
tlzl
.,
TRIBHUVAN iJNIVERSITY
23
INSTiTUTE OF ENGINEERING
Examination Control Division
2072
Chfitra
Sabject:
-Instrumentation II (EX602)
/
/
,/
/
AuemptAllquestions,
The figures in the margin indicate Full Marks'
Assume suitable data if necessary-
1.
a) What do you understand by a closed loop MBI system?
lll
b) Differentiate unique vs non unique address decoding.
t4l
Candidates are required to give their answers in their own words as far as practicable.
.c)
specifi the
addresses for the ports
Er
Ez
of 8255PPI shown in figure below.
t3l
E:
PA
3x8
Decoder
Ao
8?55
cs_
RD
2.
a) List out the technical benefits of using 8255 PPI in a MBI
b)
WR
system.
.
of 8255
operation
explain
the
example,
appropriate
an
and
diagram
With a neat timing
and an
signals
conffol
necessary
the
show
clearly
should
PPI in mode 2. You
write
the
Also
microprocessor.
to
8085
8255PPI
interfacing circuit to connect
in
this
8255
[3+3+2J
n.""rruryiontrol words to configure the
fashion.
3. a)
What are the errors associated with serial data transfer and their error checking
14l
mechanism?
b) What is USB on the Go? Write short note on USB packet types.
4.
a) With necessary illustrations, explain the cause behind the
and D/A conversion.
ll+31
DNL and INL enors in AID
tzl
DAC using 8255 PPI to a 8085 microprocessor to generate a
square w'ave oscillating between 0V and -5V having a frequency of I KHz. Show the
b) Interface a suitable
interfacing circuit and the necessary
prograrn.
[3+3]
,
I.
5. A
datalogger receives signals from Bluetooth Scatte.rnet which consists of different
Bluetooth devices. The data retrieved needs to be transmitted via option fiber iinks.
a) What is frequency hopping? Relate it with the Bluetooth technology.
b) Write in brief about the typical characteristics of a datalogger.
c) Draw aneat and labelled block diagram of the complete system.
d) Compare and conhast the terms data archiving and data storage.
6. a) Explain the remedial strategies for various energy couplirrg rnechanisms .
b) An electronic circuit receives noise from a switching element. If voltage on the
switching device swings from 4V to 6V within l00ps, during which current makes a
transition from l0 pA to 25 $A in l0 ns, rvhat might be the noise coupling
mechanism? IdentiS it using suitable calculations.
tzJ
t3l
{Zl
Il]
t41
l2l
7. DOECE is looking for
an expert engineer to work in the research projects of high
frequency, high speed applications. What guidelines would you suggest as an engineer to
design high speed and high frequency circuits? Explain in detail.
8.
Circuit boards combine electronic components and connectors in to a functional system
through electrical connections and mechanical support. Explain the factors that need to be
considered while creating traces to connect the elechonic components.
g. A
10.
t6l
'
i6]
software company is planning to make new software. Suggest good procedure to
develop software. Explain different types of software models.
[3+5]
Draw the complete block diagram of the industrial process control involved in your case
study. What are the critical factors affecting the production you have noticed in the
visited industry and what are the measures can you suggest for the same? Also mention
advantages and disadvantages of suggested system.
tl2]
**+
FUII
Yerr
I
6
s
-101-
5g
XY
o
o9
10
?
OQ
.
I
i
1i.
1'-'
'
.
..:
l-R.itsHiii,Al'I uNJi'Eit'i:T1'
!r\4lii
INSTITUTE OF ENGINE EP.li\JG
Exaarirr a tion Co ntrol Division
Level
ffisffi#EH#
BE
Fsogramae BEL, BEX, BCT
Year /Part
rsE$xtri"Hffiru
ffi
Full Marks
80
Psss J|f,erlt:
a1
Time
3 hrs..
Instrtirnentati
.
,,::.:
d)
U&at
a-re thg. addresses captrired by..,vour.card?
Generate'ihe conuol rvord -for the
t.
"1.
3',.u)
.b)
A,rDror D/r'.
,s)'stem.
indust-ial process control invoir,'ed in ;vgur
the oioductibn you have noticecj in
yiud -sug€est foi the ;ame?. $1at probieiae
suggested process con6oI s1,'.sErn.
li2i
17
:...
. "::
.",
..1.._.:,.:.:r:':.r:ri:r.:-;1:j:1:.:
i{,..
I
23
!
Itt:gtr le r
Erem.
TRIBHWAI{UNTVERSITY
a
INSTITUTE OF ENGINEERING
I
I
Examination Control Division
.J
BE
Level
Programme
Year / Pert
2071 Chaitra
BEI,
BE)(
BCT
m/I
Full Merks
i-m
Prss llflerks
32
fime
3 hrs.
1
S ubj ect :
l
iI
T
I
I
I
J
I
II
/
{
{
{
- lnstrumerfianon
ll
(H((l2 2)
Candidates are required to give their answers in their own words as far as practicable.
Attempt 4lguestiotts.
The fig;ures in the margin indicate Fult Marks.
Asswne suitable data if necessary.
n
I
I
I
l. lyiow do you select a microprocessor or a microcontroller for your project?
t3l
b)r6xplain the block diagram of a microprocessor based instrumentation system. What are
.-/ ttte basic features of a microprocessor based instrumentation system?
15l
2. ALllfk
,/
a short note en PCI Bus.
121
b)4nterfae, a keybqrd and a printer in mode
l.
Port
A is designed as input for keyboard
1r
-
with interrup VOport B is designed as output for printer with status check VO. Draw the
mapping circuit and write the control word and address map.
t6I
3. /'i)Desien a cable that has a USB connector at one end and an RS422 @nnector at the other
*\v%a.-Assume the USB is connected to a laptop and ttre RS-422 connector is attached to a
printer. Your design strould include the following:
t6I
D Technical names of thepins and wires involved in the design.
ii) lntermdiarc chips to maintain voltage uniformity betrveen the turo standards.
iii) Neat and labeled sketch ofthe wiring between the two standards.
('
\ \ b) What isa USB interface chip? Why arethey required? Compare and contrast USB device
intedacerhips and USB host interface chips.
.4.
gYCalatlate the values of the LSB, MSB, resolution and full-scale ou9ut for an 8-bit DAC
for the 0.to lOV range.
\./
v
,.
Ay{o*can
you desigr a DAC with 12 bit resolution with the 8085 microprocessor having
bits datalines? Explain with suitable block diagram.
e,ffi;;[#;:*"ntial
plifitain Bluetooth
components of data acquisition system? Explain with the help
I2l
E
t6I
of
t4I
network topology
in brief. What are the
advantages
of
Bluetooth
Vpplications?
6.
t4l
t4l
are the characteristics
ofa safety ground?
121
different types of noise coupling mechanism in brief. How do you check their
in the circuit?
t-
I4l
..:
,
'.i..:.'\::'..,:Y:.:.
... .....,.. : .r...:.. r., i: _.-.:: . :.,. :...r,..1..1
7.
1 :...r'.
:'
n
\A-ldata logger receives signals fiom a Bluetooth scattemet. The scatte,rnet consists of three
piconets and within each piconet there. are four bluetooth devices. The piconets
communicate within themselves and amongst each other using the masEr/slave protocol. [10]
$/Descnbe an analog transmission mechanisrn to capture the blue tmth sigrrals by the
-
U/
tdata logger. Draw a complete system block diagram.
picffi
pgscriUe the mater/slave protocot that'is pr€sent in blue tooth
and scattemets
tyfiruw the scattemet topology depicting the scenario maintained in dre question. Make
sure you adhere to the rules of the masterdglave protocol.
g. a)Xhile
J
designing an electronic instrument you should group circuits according to their
chaacteristics
to
maintain the correct operation
of
each
circuil What are the
considerations during grouping components and circuits and what is
tre
impact of such
grouping?
//
)D.{h"are
t4l
l2l
the factors that derive reliability of an electronic system?
Co prn and contrast
their
the three traditional models of softu,are developmcnt with respect to
weaknesses.
Propose a fourth software develolrrrcnt model that
shengdrs -and
outperforms
the classical methods and jur*i$ your choice
in terms of
reliability,
maintainability, flexibility, portability and reusability.
t4I
]0.pfuw the comptete block diagram of industrial process conhol system involved in your case
L,/ study. Explain why you want to implement this contol system over existing one in tcrms of
cost, manpower and plant automation. What problems you might face afur implementating
this control
system.
[2]
ia
I
!
t.
24
TRIBHUVAN I.'NIVERSITY
Exam.
INSTITUTE OF ENGINEERING
LeVel
Examination Control Division
2069 Chaitra
S ubieet
{
{
{
/
1.
2.
.
Prograinme
u/I
Year/Part
: - lnstrumentation'
BE
BEL- BEX,
BCT
Itcgtt lrr t'
Futl lt{arks
80
Marl$
32
Pass
Time
3 hrs.
II (eY602)
Candidates are required to give their answers in their own words as faras practicable.
Afiempt All questions.
Thefigures tn the margin fudicate Full Marks.
Assume suitable data if necessqryl.
Explain briefly the concept of DMA. Draw circuit Diagram of an interfacing circuit
containing 4 KB ROM and 8 KB RAM. Assuming Base address in 4000H. You also need
to draw write and read cycletiming diagram.
[2+61
In a microprocessor based qrstem, an 82554 PPI card is used to interface a keyboard and
a printer to the processor. The 8255A PPI is interfaced with the 8085 microprocessor in
the systern such that the base address of 8255 A PPI is 4M4H.
a) What are the addresses captured by the card?
b) Draw the complete inter&cing circuit of 82554 PPI with 8085 micropnocessor for the
given
tU
system.
t3I
c) If the printer is interfacod to port A andthe keyboard
is interfacedto port B of the PPI
generate the control qrerd to initialize the 8255A PPI with proper explanations. Both
printer and keyboard use 8-bit parallel data tansfer with
handshaking
d)
3. a)
b)
4.
Derive the control word to enable intemrpt request to the microprooessor by port A
8255A PPI in above systerq with proper explanations
Compare the USB standards: USB 1.1 and USB
l2l
of
121
2.0
t3I
Describe simplex, halfduplex and full duplex operation using RS-232
port.
I7l
rylat are types of errors pre.sent in a A/E or D/A converters? With necessary diagram
explain theTnterfacing a ADC using
[3+5]
a.'
t.a
I
*:
intemrpt.
5.-a) Explain different netuaork topologies of Bluetooth device with appropriate diagrams. 141
b) Vhat is a data logger? Erp[ain the desirable characteristics for adatalogger. tl+3]
6. Explain different types of Noise coupling Mechanism with concept of Pseudo
':
7.
What are the reasons for using low power? Mention the guidelines to be considered for
low power
12+41
design.
8. A careful circuit layout not only makes the pt'oduction of circuit
9.
10.
boards easier but also
makes them less error prone. What rules does a designer have to follow while routing
signal tracks in PCBs in order to avoid the effects of impedance mismatch and crosstalk? [3+3]
What is.fault tolerance in software? What do you mean by roll-back recovery and rollforward recovery? Exptaindifferent types of bugs in
t2+2+41
softruare
a)
b)
What are the types of Microprocessor based system used in instnrmentation system?
Horv it rnakes more benefits in industry?
t3I
Explain detail about different processing plant which you have studied in case study.
Also draw the block diagram for further improvement of these all plant and overall
system.
.,
[9]
rl ri rt
4i:!fi
24
.I'RIBHUVAN LINIVERSITY
Exam. i
INSTITUTE OF ENGINEER.ING
Level
Examination Control Division
Progmmme
m/I
Year/Part
2069 Chaitra
BE
BEL, BEX,
BCT
l{rgu lrt t'
Full Marks
80
Pass Marks
32
Time
3 hrs.
:
Subiect: - Instrumentation
{
r'
/
{
II (D(602)_
Candidates are required to give their answers in their own words as far as practicable.
Affempt All questions.
Thefigures in the margtn indicate Full Marks.
Assume suitable data if necessary.
1. Explain briefly the concept of DMA. Draw circuit Diagram of an interfacing
circuit
containing 4 KB ROM and t KB RAM. Assuming Base address in 4000H. You also need
to draw write and read cycletiming diagram.
[2+61
2.
In a microprocessor based system, an 82554 PPI card-is used to interface a keyboard and
a printer to the proeessor. The 8255A PPI is interfaced with the 8085 microprocessor in
the system such that the bas address of 8255 A PPI is 4044 H.
a) What are the addresses captured by the card?
b) Draw the complete interfacing circuit of 8255A PPI with 8085 microprocessor for the
given
system.
tU
t3I
c) If the printer is interfaced to port A and the keyboard
is interfaced to port B of the PPI
generate the control word to initialize the 8255A PPI with proper explanations. Both
printer and keyboard use 8-bit parallel data transfer with
handshaking.
l2l
d) Derive
the control word to-enable intemrpt request to the mtcroprocessor by port A of
82554 PPI in above sysGem, with proper explanations.
3. a) Compare the USB standrds: USB l.l and USB 2.0
b) Describe simplex, half duplex and full duplex operation
4.
l2l
t3I
using RS-232
port.
t7l
What are types of errors pesent in a A/D or D/A converters? With necessary diagram
explain ttre interfacing a ADC using
[3+5]
intemrpt.
5. a) Explain different networktopologies of Bluetooth device wtth appropriate diagrarns. t4l
b) What is a data logger? F,rytain the desirable characteristics for a datalogger. [+3]
6.
7.
Explain different types
impedance
of
Noise coupling Mechanism with concept
of
Pseudo
t6l
What are the reasons for using low power? Mention the guidelines to be considered for
low power
[2+41
design.
8. A careful circuit
9.
10.
layout not only makes the production of circuit boards easier but also
makes them less error prone- What rules does a designer have to follow while routing
signal tracks in PCBs in orderto avoid the effects of impedance mismatch and crosstalk? [3+3]
What is fault tolerance in softrrare? What do you mean by roll-back recovery and rollforward recovery? Explain different types of bugs in softrvare.
t2+2+41
a)
What are the types of Microprocessor based system used in instrumentation system?
How it makes more benefits in industry?
b) Explain
t3I
detail about different processing plant which you have studied in case study.
Also draw the block diagram for further improvement of these all plant and overall
system.
t9I
***
4IR
Exam.
Level
TRIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERT.NIG
Examination Control Division
Programme
Year lPart-
2068 Baishakh
Iar / Back
FullMarks
Pass Marks
Time
BE
BCT
III/I
80
32
3 hrs.
Subjea: - M icroprocessor Based Instnrmentation
'/
'/
'/
./
Candidates are required to give'their answers in.their own words as far
Attempt All questionsThe figures-in the margin indicate Full Marks.
Assume suitable deta if necessary.
l.
lnterface two 8K RAM chips and two 4K EPROM chips with 8086 so as to furm a
completely working syst€m configurati-on. We know that, after reset, 8086 starts from
address FFFF0H. Select the starting'address of EPROM Such that this address (FFFF0H)
lies in it. The RAM address must starr at 00000H.
as practicable.
[10]
2. a) If the speeds of UO devices do not match the speed of the microprocessor,
what types
of data transfer techniques are used? Describe them brieTly wirh-necessary block
'
diagrams and control
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An 8255A PPI cmnected to 8085 has a system base address of 80H.
tsl
s-ignals.
b)
i)
ii)
iii)
What are the addresses assigned for Port A, Port B, Port C and control register?
Write down the control word to initialize this card as follows: Port A mode 0
output, Port B handshake input, Port Crr*, output and reamingpin of Port Cro,,,o
input.
For above casgwrite down bit set/reset control word to initialize Port B intem-rpt
request.
3.
'
Differentiate betwee,n synchronous and asynchronous data transmission. What is the time
required for transmission of a character with one start bit, 7 data bits, one parity bit and
one stop bit with l20O baud?
14+4)
What are the criteria for selection of Analog to Digital converter for your design?
t4l
45. a)
b)
6. a)
b)
An arc welder on lhe.end of the robotic arm generators noise interference in the local
embedded controller. The welder produces l20A at i2V. What could be the couptring
mechanism for noise interfereqce? How this can be minimized?
t4l
How would you-protect.against electrostatic discharge?
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Define crosstalk- How can reduce crosstalk when routing signal traces on a PCB.
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List out the factors which you need to consider for high speed design.
[:t
7.
Discuss the prototlping model of software development with its merits and demerits,
.8.
a)
b)
9.
Discuss the advantages of digital signal transmission over analog signal transmission.
Draw the clear block
Oiagffif
data logger showing all necessary components.
Write short notes on:
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{41
l6x2)
a) Static and Dynamic errors in Digital to Analog Converters
b) Software selection and purchase
x*{.
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Erem.
TRIB}TT'VAI{T'NIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division
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Programme
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Post ltflrrks
32
Time
3 hrs.
YearlPart
2068 Chaitra
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Subiect: .-lnsfitmeitation[IJEx602)
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Attempt&.questions.
The figures in the mwgin indicate Full Marls.
Assume sfitable data if necessuy.
l.
a)
Candidates are required to give their answers in their orryn words as far as practicable. ' .
.
One thing embedded real time systems have in common is that they include some type
of processor. They range any where from a serial-program input device to a fullfledged PC on a chip or board. At some point, an engineer decided on the type of
processor to use. How did he pick it? Are there any rational Feasons for picking one
over another? Or are all processor selections based on personal bias? And what are the
situational factors imposing selection of a microproi"sor or microcontroller for a
b)
2.
design. Discuss at length.
l7l
Give a short introduction of ISA bus.
t3I
You have to interface ADC with 8085 using 82554 ports. Interface a fan and a heater
using opto couplers to derive the I/O devices. If thi temperature is less than 10"C, tum on
the heater and if the temperature is higher than 35oC, tum on the fan. [Jse port A of 8255
for.transfening digital data output of ADC to the CPU and part C for control signals.
Assume that an analog input is present at second input. of the multiplexer and a clock
input of suitable frequency is available for ADC. AIso write an appropriate flow chart and
algorithm to facilitate your design. Draw the diagram of your design.
3. a) What is disaster
recovery
in
software? How could
it
be implemented at your
t3l
organization?
b) In the software developments
..
.,,,
process, proper planning is essential in
finished product to the client. Equally it is important that bugs have to be removed
from the product Discuss in details about the nature of bugs in software development
process. What are the preventive steps you would take to minimize introduction of the
delivering the
bugs?
*
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4. How
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stub discontinuity cause impedance mismatch. Also point out the causes of
crosstalk. Explain in your own words.with relevant figure.
[4+2]
5. "Establishing requirement
is the most diffrcultpart of circuit design". While designing the
electronic circuit, speciff and explain the procedure of converting the requirements into
design.
6. a)
b)
i
7.
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Differentiate between USB 1.1 and USB 2.0. State briefly how USB 2.0 identifies
itself with the interfacing unit and establishes communication protocol. Draw the
necessary diagrams.
t6l
Explain the functions the DSR, DTR, RTS, CTS, TXD and RXD signals.
tzl
Signals from'three different transducers (A, B and C) lo-cated 100 meters away from a
control room in a factory are very important to control sleppcr motors to give final tune to
the products. The strength of these signals ranges frot tOmV tq 20mV and separated at
4KJJrz: TransducerA, B and C generate 6KHz, l0KHzand l4KHz signals
:
t)
'
If yotr A/D convefier do not have S/H hold circuits, wlat qpecification of S/H chip
you select for your design? Discuss also the errors associdte with the
converter.
8. a) Why
against ESD should be considered in design?
b) Describe different types of noise coupling mechanism in brief and how do you check
9. .a)
b)
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tit
theirpredominance in the circuit?
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What is Bluetooth device? How does it uansmit data using pico and scatter net?
t31
Draw the block diagram of a data logger and explain its operation in details.
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10. Recommendthe changes that you deem necessary in the visited industry during your case
study?-Explain the neasons why management should implement these changes? Assume-
'
that you have a senior reporting Computer/Electronics engineering closely looking at
work from the system development level, apart from con'vincing the management team at
the visited industry to implement new system, yoir also need to convince the senior
engineer technically so that your recommendation will be implemented. How do you
want to achieve this technically? Debate on your technical design to replace the current
system and also relate probable problems you might face after system implementation.
-l
u2l
***
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