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Tektronix 454A User Manual

Tektronix 454A
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Ci r cui t
Descr i pt i on
- 454A/ R
454A
T
h
ezyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
§
-
GAI N
ad
j
ust ment ,
8567,
p
r ovi
d
es si gnal
at t enu
at i o
n
p
osi t i on
of t h
e
SO
UR
C
E swi t c h
.
T
h
e
CO
UPL
I
N
G
t o
cal i br at e
t
h
e
X- axi s
d
ef l ect i on
t o
t
h
e
CH
1
VO
L
TS/ DI
V
swi t c
h sh
o
u
l
d
not
b e
i n t
he
LF- REJ
p
osi t i on
w
hen
usi ng
swi t c h
d
ef l ect i on
f act or s
w
h
en
o p
er at i ng
i n
t h e
§
-
¥ mo
d
e
.
t
h
i s
t r i gger
sou
r ce, as
t
h
e
si gnal
wi l l
b e bl oc ke
d
b y
t
he
LF
T
h
e
si gnal
i s
t
hen
connect e
d
t o
t
he del ay
com
p ensat i on
r e
j
ect
ci r cui t
.
net wor
k
,
C568- C569-
L
568-
R569
.
C568-
L
568- C569
com-
p
r i se ±
p
i - sect i on
f i l t er
wi t
h
±
r es
p
onse
t
h
at
a
pp
r oxi mat es
±
f i xe
d d
el ay
.
T
he
d
el ay
of
t
h
i s
net wor
k
ap
pr oxi mat es
t
h
e
E
xt er nal
t r i gger si gnal s
a
pp
l i e
d
t o
t
h
e
§¤
T
R
I G
d
i f f er ence
i n
d
el ay
b
et ween
t
h
e
§
an d
¥
channel s
( abo
u
t
I
NPU
T
connect or can
be
u
se
d t o
t r i gger
t
h
e
swee
p
i n t h e
110
nanoseconds)
.
T
h
e
H
or i zont al
Del ay
Com
p
ensat i on
§¤
an
d
§¤
-
10
p
osi t i ons
of
t h e
SO
UR
C
E
swi t c
h
.
a
d
j
ust ment ,
R
569,
i s
a
d
j u
st e
d
f or
mi ni mum
phase
s
h
i f t
at
I n
p u
t
r esi st ance
at
DC
i s
a bo
u t
one
mego
h
m
p
ar al l el e
d b y
me
d
i
u
m
f r e
q uenci es
an
d
L
568
i s
ad
j
ust ed
f or
mi ni mum
abo
u t
15
p
F
i n
bot
h ext er nal p
osi t i ons
.
H
owever ,
w
hen
t h
e
phase
s
h
i f t
at
h
i g
h
f r e
q uenci es
.
T
h e
r es
u
l t ant
d
i s
p
l ay
p
r o-
CO
UPL
I
N
G
swi t c
h
i s
set
t o
LF
REJ, ± 100- k
i l o h
m
r esi s-
vi des
acc u
r at e
§
-
¥
meas
u
r ement s
up
t o
abo
u
t
t wo
mega-
t or ,
R
609,
i s
connect e
d
i n
p
ar al l el
wi t h
t
h
e
one- mego
h
m
h
er t z
;
at
h
i g
her
f r e
qu enci es
t h
e
i n
h
er ent
ph
ase
s
h
i f t
i n
p u
t
r esi st ance
( 13614- 13615) ,
t o p
r ovi
d e
at t en
uat i on of
b
et ween
t
h
e
§
an
d
¥
c
h
annel s
may
p r event accur at e
§
-
¥
l ow- f r equency
si gnal s
.
T
h
i s
p
r ovi
des an
ext er nal
i n
p u
t
r esi s-
meas
u
r ement s
.
T
h
i s
d
i f f er ence
i n
d
el ay
bet ween
t
h
e
§
an
d
t ance
of
abo
u t
91
k
i l o
h
ms
i n t
h
i s
CO
UPL
I
NG
swi t ch
¥
channel s a p p
ear s
as
±
p
h
ase
d
i f f er ence
i n t
h
e
§
-
¥
d
i s
p
l ay
p
osi t i on
.
I n
t
h
e
§¤
-
10
p
osi t i on,
±
10
t i mes
f r e
q
uency-
an
d
i t
i ncr eases
r a
p
i
d
l y
a b
ove
a
b
out
t wo
mega
h
er t z
si nce
com
p ensat e d
at t enuat or
i s
connect e
d
i nt o
t h e i n
p
u
t
ci r c
u
i t
.
t
h
e
a
pp
r oxi mat i on
of
t
he
d
el ay
com
p ensat i on
net wor
k
i s
T
h
i s
at t enuat or
r ed
u
ces
t
he
i n
p
u t
si gnal
am
p
l i t
ud
e
10
t i mes
no
l onger
val i
d
.
T
he ou
t
pu
t
of
t
he
§
Si gnal
Com
p
ensat i on
t o
pr ovi de
mor e
LEVEL
cont r ol
r ange,
w
h
i l e
mai nt ai ni ng
net wor
k
i s
connect e
d t o
t
h
e
H
or i zont al
Am
p
l i f i er
ci r cui t
.
t
he
one- mego
h
m§
15
pF i np u
t
R
C
c h
ar act er i st i cs
.
3-
1
4
T
RI GG
ER
G
ENER
ATO
R
Tr i gger
Cou
p
l i ng
Gener al
T
he
CO
UPL
I
N
G
swi t c
h
,
S608,
of f er s
±
means
of
acce p
t i ng
or
r e
j
ect i ng
cer t ai
n
com
p
onent s
of
t
he
t r i gger
T
he
Tr i gger
Gener at or
ci r c
u
i t
p r od u
ces
t r i gger
p
u
l ses
si gnal
.
I n
t
he
AC
and
LF
REJ
p
osi t i ons
of
t
he
CO
UP
-
t o
st ar t
t
h
e
Swee
p
Gener at or
ci r cui t
.
T
h
ese
t r i gger
p
ul ses
L
I
N
G
swi t c h
,
t
he
DC
com
p
onent
of
t
he
t r i gger
si g
nal
i s
COUP-
ar e
d
er i ve
d
ei t
h
er
f r om
t he
i nt er nal
t r i gger
si gnal
f r om
t
he
bl oc
k
ed
by
cou
p
l i ng
cap
aci t or
C606
or
C607
.
F
r e
qu
ency
ver t i cal
d
ef l ect i on
syst em,
an
ext er nal
si gnal
connect ed
t o
component s
bel ow
about
60
h
er t z
ar e
at t enuat e
d
i n
t
he
AC
t
he
§¤
T R
I G
I
NPU
T
connect or ,
or ±
sam
p
l e
of
t
h
e
l i ne
vol t age
a
pp
l i e
d
t o
t
h
e
i nst r ument
.
Cont r ol s
ar e
p
r ovi
d
e
d
i n
posi t i on,
and
bel ow
about
50
k
i l o
h
er t z
i n
t
h
e
LF
REJ
posi -
t i on,
w
h
i l e
t
h
e
h
i g
h
er - f r e
qu
ency
com
p
onent s
of t he
t r i gger
t
h
i s
ci r c
u
i t
t o
sel ect
t r i gger
l evel ,
sl ope,
cou
p
l i ng
an d
si gnal
ar e
p
asse
d
wi t
h
out
at t en
u
at i on
.
sour ce
.
F
i g
.
3- 10
s
h
ows
±
d
et ai l e
d bl oc k
di agr am
of
t
h
e
Tr i gger
Gener at or
ci r c
u
i t
.
sc
h
emat i c
of
t
h
i s
ci r cui t
i s
s
h
own
on
d
i agr am
6
at
t
h
e
b
ac
k
of
t
h
i s
manual
.
H
i g h
- f r e
q
uency
com
p
onent s
of
t
he
t r i gger
si gnal
ar e
at t enuat ed
i n t
he
HF
REJ
p
osi t i on
.
T
he
t r i gger
si gnal
i s
AC
co
upl ed t o
t
he
i n
p
ut ,
at t enuat i ng
si gnal s
b
el ow
abo
u
t
60
Tr i gger
Sour ce
h
er t z
an d
above
abo
u
t
50
k
i l o
h
er t z
.
T
he
DC
p
osi t i on
passes
T
he
SO
UR
CE
swi t c h
,
S602,
sel ect s
t
he
sour ce
of
t
h
e
al l
si gnal s
f r om
DC
t o
150
mega
h
er t z
.
t r i gger
si gnal
.
T
h
r ee
t r i gger
sour ces ar e
avai l abl e
;
i nt er nal ,
l i ne,
and
ext er nal
.
f o u
r t
h p
osi t i on
of
t
he
SO
UR
C
E
swi t c h p
r ovi
d
es
10
t i mes
at t en u
at i on
f or
t
h
e
ext er nal
t r i g-
I n
p
ut
Sour ce
F
ol l ower
ger
si gnal
.
T
h
e
I n
p
u
t
Sour ce
F
ol l ower ,
Q623,
pr ovi des ±
h
i g
h
i n
p ut
i m
p
edance
f or
t
he
t r i gger
si gnal
.
I t
al so
p
r ovi
d
es
i sol at i on
b
et ween
t
he
Tr i gger
Gener at or
ci r c
u
i t
an d
t
he
t r i gger
T
he
I nt er nal
t r i gger
si gnal
i s
obt ai ne
d
f r om
t
h
e
ver t i cal
si g
n
al
so
u
r ce
.
Di o
d e
CR623
p
r ot ect s
Q623
i f
excessi ve
d
ef l ect i on
syst em
t
hr ou
g
h
t
he Tr i gger
P
r eam
p
ci r c
u
i t
.
T
h
i s
i n
p ut
vol t age
i s
a p
pl i e
d t o
t
he
§¤
T R
I G
I
NPU
T
connec-
si gnal
i s
±
sam
p
l e
of
t
he
si gnal s)
ap
pl i e
d t o
t
he
I
NPU
T
CH
t or
.
T
he
out p
u
t
si gnal at
t
he
sour ce
of
Q623
i s
connect e
d
1
and/ or
CH
2
connect or s
.
F
ur t h
er
sel ect i on
of
t
he
i nt er nal
t o emi t t er
f ol l ower
st age
Q624,
w
h
ose
o
u
t
p ut
i s
connect e
d
t r i gger
sour ce
i s
p
r ovi
d
e
d b y
t
h
e
T R
I GG
ER
swi t c h
t o sel ect
t o
t
h
e
Sl o pe
Com
p ar at or
st age
.
t
he
i nt er nal
t r i gger
si gnal
f r om
bot h c h
annel s,
or
f r om
C
hannel
1
onl y
( see
Tr i gger
P
r eam
p d
i scussi o
n
f or
d
et ai l s)
.
Sl ope
Com
p
ar at or
T
h
e
l i ne
t r i gger
si gnal
i s
o b
t ai ne
d
f r om
vol t age d
i vi
d er
Q636
an d
0646
ar e
co
nnect e
d
as
±
d
i f f er ence
am
p
l i f i er
131104- 131105- 131106
i n
t
he
P
ower
S
u
pp
l y ci r c
u
i t
.
T
h
i s
( com
p
ar at or )
t o p
r ovi
d
e
sel ect i on
of
t
he
sl o
p e an d
l evel
at
sam
p
l e
of
t
he
l i ne
f r e
q u
ency,
about
1
. 5
vol t s
RM
S,
i s
w
h
i c
h
t
he
swee
p
i s
t r i gger e
d
.
T
he r ef er ence
vol t age
f or
t
h
e
cou
p
l e
d t o
t
h
e
Tr i gger
Gener at or
ci r cui t
i n
t
h
e
L
I
NE
com
p
ar at or
i s
p
r ovi de d b
y
t
he
LEVEL
cont r ol ,
R
649,

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Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

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