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Tektronix 454A - Page 48

Tektronix 454A
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O
p
er at i ng
I nst r
u
ct i ons- 454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
‘
/
R
454A
2
.
Set
t
h
e
M
OD
E
swi t c h t o d
i s
p
l ay
t
he
c
h
an
n
el
use
d
.
8
.
Mu
l t i
p
l y t
h
e d
i st ance
measur e
d
i
n
st e
p 7 b
y
t
h
e
VO
L
TS/ DI
V
swi t c
h
set t i ng
.
Al so
i ncl ude
t
h
e
at t enuat i on
f act or
of
t
h
e
pr o
b
e,
i f
any
.
3
.
Set
t
h
e
V
O
L
TS/ DI
V
swi t c
h
t o di spl ay
about
f i ve
di vi si ons
of
t
h
e
wavef or m
.
E
xam
p
l e
.
Assume
±
pea
k
- t o-
p
ea
k
ver t i cal
def l ect i o
n of
4
. 6
di vi si ons
( see
F
i g
.
2- 19)
usi ng
±
10
§
at t e
n uat or
pr o
b
e
4
.
Set
t
h
e
I nput
Coupl i ng
swi t c
h
t o
AC
.
and
±
VO
L
TS/ DI
V
swi t c h
set t i ng
of
. 5
.
• Ÿ¤•
U
si ng
t
h
e
f or mul a
:
F
or
l ow- f r equency
si gnal s
bel ow about
10
h
er t z,
u
se
t
h
e
DC
posi t i on
.
5
.
Set
t
h
e
‘
Tr i gger i
ng cont r ol s t o obt ai n ±
st abl e
Subst i t ut i ng
t
h
e
gi ve
n
val ues
:
d
i s
p
l ay
.
Set
t
h
e
¤™œ•
/ DI
V
swi t c h t o
±
p
osi t i on
t
h
at
d
i s
p
l ays
sever al
cycl es
of
t
h
e
wavef or m
.
V
ol t s
P
ea k t o
P
ea
k
=
4
. 6
§ 0
. 5
V
§
10
6
.
Tur n
t
h
e
ver t i cal
P
OSI TI O
N
cont r ol
so
t
h
e
l ower
The
pea k
- t o-
p
ea
k
vol t age
i s
23
vol t s
.
p
or t i on
of
t
he
wavef or m
coi nci
d es
wi t
h o
n
e of
t
h
e
gr at i cul e
l i nes
b
el ow
t
h
e
cent er
h
or i zont al
l i ne,
an
d
t
h
e
t o
p of
t
h
e
wavef or m
i s
on
t
h
e
vi ewi ng
ar ea
.
M
ove
t
h
e di sp
l ay
wi t
h
t
h
e
I nst ant aneous
V
ol t age
M
easur ement s- DC
h
or i zont al
P
OSI TI O
N
cont r ol ,
so
one
of
t
h
e
u p per p
ea
k
s
l i es
near
t
h
e cent er
ver t i cal
l i
n
e
( see
F
i g
.
2- 19)
.
To
measur e
t
h
e
DC
l evel
at
±
gi ven poi nt
on
±
wavef or m,
use
t
h
e
f ol l owi ng
pr oce
du
r e
:
7
.
M
easur e
t
h
e
d
i vi si ons
of
ver t i cal
def l ect i on
f r om
pea
k
1
.
Connect
t
h
e
si g
n
al
t o
ei t
h
er
I
NPU
T
connect or ,
t o
p
ea
k
.
M
a
k
e
sur e
t
h
e
VA
R
I A
BLE
V
O
L
TS/ DI
V
cont r ol
i s
i n t
h
e
CA
L
p
osi t i on
.
• Ÿ¤•
T
h
i s
t ec
h
ni que
may
al so
b
e
u
sed
t o
ma
k
e
meas
u
r ement s
b
et ween t wo
poi nt s
on
t
h
e
wavef or m
r at
h
er
t
h
an
pea
k
t o
pea
k
.
P
osi t i o
n
t o
ce
n
t e
r
l i ne
V
ol t s
ver t i cal
VO
L
TS/ DI
V
pr obe
P
ea k t o
P
ea
k
d
ef l ect i on
§
set t i
n
g
§
at t en
u
at i on
( di vi si ons)
f act or
2
.
Set
t
h
e
M
OD
E
swi t c
h
t o d
i s
p
l ay
t
h
e c
h
annel
used
.
3
.
Set
t
h
e
VO
L
TS/ DI
V
swi t c
h
t o
d
i spl ay
abo
u
t
f i ve
d
i vi si ons of
t
h
e
wavef or m
.
4
.
Set
t
h
e
I np
u
t
Cou
p
l i ng
swi t c
h
t o
G
N
D
.
5
.
Set
t
h
e
‘
S
WEEP
M
OD
E
swi t c
h
t o
A
U
TO
T
R
I G
.
6
.
P
osi t i on
t
h
e
t r ace
t o
t
h
e
bot t om
l i ne
of
t
h
e
gr at i cul e
or ot
h
er
r ef er ence
l i ne
.
I f t
h
e
vol t age t o
be measur ed
i s
negat i ve
wi t
h
r es
p
ect
t o
gr oun
d
,
p
osi t i on
t
h
e
t r ace t o
t
h
e
t o
p
l i ne
of
t
h
e
gr at i cul e
.
Do
not
move
t
h
e
ver t i cal
P
OSI TI O
N
cont r ol
af t er
t
h
i s
r ef er ence
l i ne
h
as
been
est abl i s
h
ed
.
• Ÿ¤•
To meas
ur
e ± vol t age
l evel
wi t
h
r espect
t o
a
vol t age
ot
h
er
t
h
an
gr oun
d
,
ma
k
e
t
h
e
f ol l owi ng
c
h
anges
i n
st ep
6
:
Set
t
h
e
I nput
Co
u
pl i ng
swi t c
h
t o
DC
and
appl y
t
h
e
r ef er ence
vol t age
t o
t
h
e
I
NPU
T
connect or
.
F
i g
.
2- 19
.
M
eas
u
r i ng
p
ea
k
- t o- pea
k
vol t age
of ±
wavef or m
.
T
h
en
posi t i on
t
h
e
t r ace
t o
t
h
e
r ef er ence
l i ne
.

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