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Tektronix 454A User Manual

Tektronix 454A
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Ti me- Di f f er ence
M
easur ement s
T
h
e
cal i br at e
d
swee
p
r at e
an
d d
ual - t r ace
f eat ur es
of
t
h
e
454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
al l ow
measur eme
nt
of
t i me
d
i f f er ence
bet wee
n
t wo
se
p
ar at e
event s
.
To
measur e
t i me
di f f er ence,
use
t
h
e
f ol l owi
n
g
p r oce d ur e
:
1
.
Set
t
h e
I n
p
ut
Cou
p
l i
n
g swi t ch
es t o
t
h
e
d
esi r e
d
cou
p
l i ng
posi t i ons
.
2
.
Set
t
h
e
M
OD
E
swi t c
h
t o
ei t
h
er
CHO
P or
A
L
T
.
I n
gener al ,
CH
O
P
i s
mor e
s
u
i t abl e
f or
l ow- f r equency
si gnal s
an
d
t
h
e
A
L
T
p
osi t i on
i s
mor e
sui t abl e
f or
h
i g
h
- f r e
q
uency
si gnal s
.
M
or e
i nf or mat i on
on
det er mi
n
i
n
g
t
he
mo
d
e
i s
gi ven
un
d
er
Dual - Tr ace
O
p er at i on
i n t
h
i s
sect i on
.
3
.
Set
t
h
e
T
R
I GG
ER
swi t c h
t o
CH
1
O
NL
Y
.
6
.
Set
t
he
V
O
L
TS/ DI
V
swi t c h
es
t o
pr o
d
uce
f our -
or
f i ve- di vi si on
d
i s
p
l ays
.
U
si
ng
t h
e
f or mul a
:
7
.
Set
t
he
LEVEL
con
t r ol
f or
±
st abl e di s
p
l ay
.
8
.
I f
p
ossi bl e,
set
t
he
¤™œ
/ DI
V
swi t c
h f or
±
sweep
r at e
w
h
i c
h s
h
ows
t
h
r ee
or
mor e
di vi si o
n
s
bet ween
t
he
t wo
wavef or ms
.
9
.
Ad
j
ust
t
he
ver t i cal
P
OSI TI O
N
cont r ol s t o cent er
eac
h
wavef or m
( or
t h e
poi nt s
on
t
he
d
i s
p
l ay
bet ween
w
h
i c
h
t
he
measur eme
nt
i s
ma
d
e) i n
r el at i on
t o
t h
e cent er
h
or i zont al
l i ne
.
10
.
A
d
j
ust
t
he h
or i zont al
P
OSI TI ON
cont r ol so
t h
e
C
h
annel
1
( r ef er ence)
wavef or m
cr osses
t
he cent er
h
or i zont al
l i ne at
±
ver t i cal
gr at i cul e
l i
n
e
.
O
p
er at i ng
I nst r uct i ons- 454
/
R
454A
C
h
annel
1
( r ef er e
n
ce)
C
h
a
nn
el
2
i .
i WEEMEWEE1
ENEENI MI NE
4
.
Connect
t
he r ef er ence
si gnal
t o
I
NPU
T
C
H
1
an d
t
h
e
com
p
ar i son
si gnal
t o
I
NPU
T CH
2
.
T
he r ef er ence
si g
n
al
F
i g
.
2- 23
.
M
easur i
n
g
t i me
d
i f f er e n
ce
bet ween
t wo
pul ses
.
s
houl d pr ecede
t h e
com
p
ar i son
si gnal
i n
t i me
.
U
se
coaxi al
cabl es
or
p
r obes
w
h
i c
h have equal
t i me
d el ay
t o
connect
t h
e
si gnal s
t o
t
he
I
NPU
T
co
n
nect or s
.
12
.
M
ul t i
p
l y t
he
measur e
d d
i f f er ence
by
t
he
set t i ng
of
t
h
e
¤™œ
/ DI
V
swi t c h
.
I f
swee
p
magni f i cat i o n
i s
used,
d
i vi
d
e
t
h
i s
answer by 10
.
5
.
I f t
he
si gnal s
ar e
of o
pp
osi t e
pol ar i t y,
pul l
out
t
h
e
I
NVER
T
swi t c
h
t o
i
n
ver t
t
he
C
hannel 2 d
i s
p
l ay
( si gnal s
may
be
of o
pp
osi t e
p
ol ar i t y
due
t o
180
°
ph
ase
di f f er ence
;
E
xampl e
.
Assume
t
h
at
t
h
e
¤™œ
/ DI
V
swi t c h
i s
set
t o
i f
so,
t a
k
e
t
h
i s
i nt o
account
i
n
t
he
f i
n
al
cal cul at i on)
.
50 ¼
s,
t
he
M
AG
swi t c h
t o
§
10
an d
t
h
e
h
or i zont al
d
i f f er ence
bet ween
wavef or ms
i s
4
. 5
d
i vi si ons ( see
F
i g
.
2- 23)
.
¤™œ
/ DI
V
hor i zont al
§
di f f er ence
Ti me
Del ay
=
set t i ng
(
d
i vi si ons)
magni f i cat i on
Subst i t ut i ng
t
h
e
gi ven val ues
:
Ti me
Del ay
=
50 ¼
s
§
4
. 5
10
T
h
e
t i me
d
el ay
i s
22
. 5
mi cr osecon
d
s
.
Del aye
d
or
M
i xe
d Swee
p
Ti me
M
easur ement
T
he
d
el ayed
sweep
mo
de
can
be use
d
t o
ma
ke acc u
r at e
t i me
measur ement s
.
T
he
f ol l owi
ng
meas
u
r eme
n
t
d
et er mi nes
t
h
e
t i me
d
i f f er ence
b
et ween
t wo
p
ul ses
di s
p
l aye
d
on
t
he
same
t r ace
.
T
h
i s
a p
pl i cat i on
may
al so
be used t o
measur e
t i me
di f f er ence
f r om
t wo
d
i f f er ent
sour ces
(
d
ual - t r ace)
or
t o
measur e
t i me
d ur at i on of ±
si ngl e
p
ul se
.
11
.
M
easur e
t
h
e
h
or i zont al
d
i f f er ence
b
et ween
t
he
C
hannel
1
wavef or m
an
d
t
he
C
h
annel
2
wavef or m
( see
F
i g
.
1
.
Co
nnect
t
h
e
si g
n
al
t o
ei t
h
er
I
NPU
T
connect or
.
Set
2- 23)
.
t h
e
M
OD
E
swi t c h t o
di s
p
l ay
t
h
e c
h
annel
use d
.
2-
35

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Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

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