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 !
"#$%&$"'()&'*"#$%&*+', /012&3*45$"'()&.$6
78$"9:;<$8*.*=43*45.*0&*=<-*(6&=$"9:;<$8*.*=4
3*45.*0&*=<3*45$"'()&9/>?4@.:*1"A*.*,-:*54./0
12&-*(6&=$"9$8*'(B&$C7D*&$E&&E/F9*G3*=-*H-
$"*I*7J*+.$"'()&'<%'K*7G33E-*#<7>**(L&M%&'D
7'NO4A<,*+$+$)/C&
M"&3P&&*= $"'()&'#3&*;*=7AMQ3RAE"'()&
C/S3*"A*T&*,$8*$U&$V.*T&1G$"3*I*?3"'()&
&U-A:;<$8*'#33:+O4>/A4O4MJ**G3&*=<WX''K*7G3
M@:*E$;3E$(B3:+O4>4X=$C3*I*?3.4X*N.+4*;4MY.A3E
*;*G3*=$"'()&<%33*(6&$C3*I*?3.$R$;$-Z&*43[4
/012&
;&U-/*7N3E*T&*;4\+36\>7$"'()&.<P*]3^*+
\8$"'()&$=0_$`$(B3$(A7"3*(6&MJ**]3P*]334&3@-
3*"/*7N:+*Z37&4XN'I*"#$%&3RA*+\8$".33*3*]'GA
*+\8a,-'D3RA<P*]3X/S&U-?3$8*?b</*7N/S-
12&*T&&J$`*]3*(*+"
c<M@3<6*[X&4Xde4C3()&.&>&7N-*2M3*\%<P
^*+\8$"'()&$=0_$`,J*&>&1#X7*(D&1fb<M"&O4
MJ**]3<PXM"&O4MJ*'<.b<\+:*P&*;M*$(B3<%
/C*+4/E.M@<"&*[X3E*;*,?H7$(AMA*T&33*:*V3-*23
*B-'I


g*7N
Nh*+

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I- Bài toán đặt ra
GA3*]"/3''"/3"-b/C7$[41Q3RA*`&b:M"?*"l3h&'b/A"
3*"3E*;/012&$;$"33M()&*B-/A4
m "I*=4$=-3A"J*g7D\N$%*n*6opq.[/C
opr*"l3spr
m "[/C3A"I*=4*J*g7D\N$%*n*6q.[/C
ppr
m "*)&A3*4X;<Z3'"&3*)&A3*4X;t<Z3'"&3*@-
'N<Z3'"&33A"uM/&<bv7*)&A3*4X;t<Z3'"&33A"7
<Z3'"&3*@-uwA''&<bv3RA333x&3*45
*&*=4y&3RA*+\8$(B3'GA3*]7Di-*H-$"MN
II- Giải quyết vấn đề
h&'b'3P&X"3[4.M@4XIM"&7=3*+:+7/>?4@33
12&32$"'()&$=0.-*WI3*/**]3GA3*]*+\8t<%3P&
X4XI/SM@3E'BM"&O4MJ*/012&N3*]<4At<%3*
**3*I**Z33RA3P&XLq=A<$;$(B3*(L&O4X'B3*I*
$&3RA*/>?4@
1 – Chọn thiết bị để đo tần số
[4N.1"33*-*W'"#3RA*`&.A/S3*]*+\8$"[/C3A"
M(D3EM@*4<"1b'$"33[/Copr.zpr.ppr.a;$#
$%3*I*?3(&{.A/S3*]33<"1b'$"3E\A1|1*'DI*@&@-o
'[[/C3[$".Z3'\A1|1*I*@'oppr
qk3*]<"1b'/A4
m wq/"ippp}mgbMb/
u~*\Nv

m wq/"•ppp}mgbMb/
m wq/"sppp}mgbMb/

€E*;*A<:*>"M"&$()&1f/A4
*-••|||*"<bA&'b3"<•b•-3mpppppzis‚ihb-/&
‚ih-&M•"/3''"/3"-bƒ-<„g…1„mois†p••zp…33„q…'3„b&‡
;$"7D<Z3$=-7D\N$%*n*6q.$;$"*4,'B.&3>
*B-'IN3*]33$[4$"*2$%&.7D*=/C.[/C3E*;*6
ppr
4X*N.3[3*U{3*]$[4$"*B-7D<"1b'
qI12
qD*]kgippp.3E*;?b<$[4$"ˆˆ†h.iopr.*=/C
€E*;*A<:*>"M"&$()&1f/A4
*-••|||*"<bA&'b3"<•b•-3mppppppp‚ihb-/&
‚ih-&M•"/3''"/3"-bm-M"\b/‡
2 – Chọn thiết bị đo điện áp
Z3$=-opq3‰&:*3A".A:*E3E*;3*]MG3+-<%*+\8
$"*Š&$=-X4X*N.A3E*;1‹&$[4$"*2$%&.&><$=
-?4C&p'[.3*4X;/A&<Z3$=-oqqD<Z3X.1d1&3*]
$(B3*+\8(&{
*A<:*>"*P&/C3*4&3RA33*]
<"1b'
m wq/"ippp}mgbMb/Œopq
m wq/"•ppp}mgbMb/Œzoq
m wq/"sppp}mgbMb/ Œzoq
A/S3*U{*]wq/"ippp
}mgbMb/.7D$[4$"ˆsi.p.ippru*J*7Sv
"l3
[4$"ˆˆ†h•piopr
3 – Chọn để đo thời gian chuyển mức logic

o
23N43*]*+\8'$;$"/G3*4X;<Z3'"&33RA*]MN'{
*4X+.7=33*4X;<Z3$=-XM67":*">&3*N*'=3*/qJ7,X.
A/S3*]*T&*+\83E*;-*W\=<Z3$=-\+$xM"&:*">&
*)&At/$x?4C&u/•17v
}H$%3*A7*)&A3RA33*]<"1b'
wq/"ippp}mgbMb/opp-/•17./•17./•17.o/•17$+
op/•17
wq/"•ppp}mgbMb/opp-/•17./•17./•17$+op/•17
wq/"sppp}mgbMb/•/•17$+op/•17
4 – Kết luận thiết bị
kGA7"33N43*IMN.3W*V3&3>.b<3*]MA*+\8*]
wq/"ippp}mgbMb/.32*;'<"1b'kgiph
*P&/C:K*4,
hA'"&A1|1*•
umi1v
r
*Ab'/ 
qbM3A'Mb/"'4" ˆ\/
qbM3A'/b/7X
uMA&bv
ppr"oppr<q•17"
oq•17••uŽA1op*<v
r<"1b'<q•17"o
q•17••uŽv.<q•17"
s
q•17uop*<v
•"/"
MA&b•"ww/b
<q"pp<q•17•Œq

‡pp<q"oq•17••Œopq
<b\A/bMA&b opp-/•17"
op/•17
Trigger type selections
c1&b M&&bM"AM/&.wA''&.
A'bMA&"Mb*bMb1&b"wAX
/"4M3b
•4'/b|1* M&&bM"A-4'/b"A/b'b3b1
3*Ab'.|*"/b<b14MA"/
'b//*AA7A'4b.&MbAbM
*AA7A'4b."M/1bA<bMA&b
‘<4<14MA"/b&/m
p/u1b-b1/"\A1|1*v
‘A?<4<14MA"/b&p/
’4M&&bM"A-"/"M4
-4'/b*AwA'/
gb4-A1*"'1 M&&bMA13'"3:•1AA/b4-A1•"M
*"'1<b7"'A"wM"<€pp"p
/
’/b•wA''<b M&&bM"M/b<b"MwA''<b
b1&b/-bb17"'A"/u€"M‡v
\A/b1"4/bMm/b'b3A\'b
*Mb/*"'1<b/b&/MA&bwM"<
u€"M‡v"M/"p/
*b1&b\4/ M&&bM"*b*b1&b"wA\4M/
*A"334M/AwbMA/-b3wb11'b
<b
<bmO4A'wb1-AbM M&&bM"A<4'm3*Ab'-AbM
|*"/b<b14MA"/'b//*AA
7A'4b.&MbAbM*AA

7A'4b.&MbAbM*AA<b7A'4b
|*A<b"4."M/1b"M"4/1b
"wA/b"w<b7A'4b/
‘<4<14MA"/b&/m
p/u1b-b1/"\A1|1*v
‘A?<4<14MA"/b&p/
z
2*;*6.3E*;1"|'"A11AA/*bb*b"':
*-••|||*"<bA&'b3"<•b•-1m†•ˆ••pm-m
kg}ipoh•"/3''"/3"-bmoppm<*rmm3*Ab'/ƒ1„m
iiozi†zpz•s…33„q…'3„b&
[4$"$(B3'GA3*]
ˆˆ†h•piopr
kAA/*bb3E*;1"|'"A1t':
*-••3-3wAMb''3"<•A&'bmb3*"'"&b/•ˆˆ†A•-M"\bm-A//7bmpmm
iopm<*r•1-•psis†
ˆ
5 – Đánh giá hiệu năng thiết bị
m qD-*H-$"I*=4$=-3A"uJ*g7D\N$%*n*6
opq.[/Copr*"l3sprvAO4AW<D33/A'=3*7*=4$=*+
k"$[41Q'GA3*]p.N/A/C3E*;\8y&qD$%3*Aoq•17.$%
3*I*?33RA*+\8:*">&Œi‚*A&$"gA/C3E*;3*@-*,$(B3.
*@'M()&*B-A:*>"/1#&3RA?4&*+\8*“MBDŒopq.‹X
7"$[4$"<A1d1&<LM%&-*#<7$"\N$%
m qD-*H-$"I*=4[/C3A"uI*=4*J*g7D\N$%*n
*6q.[/CpprvAO4AW<D/A'=3*[/CqD*A&$"'GA
3*]‡oppr./A/C(6&$C/S€‚+4<4Cy&$%3*I*?3.N
3*]$[41QI3*3G3*+\8*“MBD[/Cr.*""3E*;<L
M%&-*#<7$"[/C
m qD-*H-$"*)&A3*4X;<Z3'"&3*)&A3*4X;t<Z3

'"&3*@-'N<Z3'"&33A"uM/&<bv7*)&A3*4X;t<Z3'"&3
3A"7<Z3'"&3*@-uwA''&<bv3RA333x&3*45%3*A3RA
*+\8Dopp-/•17$R$;$"*A$#'(B&X4X*N.$;$%3*I*?3
3A".N3*]$[41QI3*3G3
m E<'#.*+\8'<%'GA3*]$U&$V7D\"X

”
P*]3^*+\8$"'()&$=0_*G3/G$`&U-b<M@*4M"&
7=3+-3,$+'K*7G3$"'()&*)E.b<3E*;*;433*P&/C
3RA*+\8.t$E3E33*3*]*+\8-*‹*B-7D*43[4/012&
3*'GA3*]MN$4'*T&33*$*&t3*Wb<N:*P&
M*:*n*+4/Ec<M@<"&*T&{:+$E&&E-t*[X733\#
$;*"*=*N<:+*Z33*"\>*Wq=3*]3:*P&\A"&)'*tA.
$C7D*T&<P*]3\</*G3+*(^*+\8$"'()&$=0_*J
7=3+-3,*+\83&$(B33"M]&
7]&\,-X/S&E--*[&U-3*U&A3E*N<:+*Z3M"&
7=3'GA3*]*+\8$"/A4X
g*7N
Nh*+
p

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