EasyManuals Logo
Home>Tektronix>Test Equipment>454A

Tektronix 454A User Manual

Tektronix 454A
365 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #81 background imageLoading...
Page #81 background image
Sawt oot
h
Sweep
Gener at or
.
T
h
e
basi c
sweep
gener at or
Swee
p
St ar t
Am
p
l i f i er
.
T
h
e
si gnal
at
t
h
e emi t t er of zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
Ÿ
753
’
goes
negat i ve
al ong
wi t
h t h
e
a
pp
l i e
d
sawt oot
h
si g-
ci r c
u
i t i s
±
M
i l l er
I nt egr at or
ci r cui t
.
Wh
en
t
h
e
cur r ent
f l ow
· ±™
.
T
h
i s
i ncr eases
t
h
e
f or war
d
b
i as
on C
R
757
B
,
w
h
i c
h
i n
t
h
r oug
h
t h
e
Di sconnect
Am
p
l i f i er
st age
i s
i nt er r u
p
t e
d by
t ur n
d
ecr eases
t
h
e
f or war
d
bi as
on
C
R
757A
.
Wh
en
t
h
e
t
h
e
swee
p gat e
si gnal ,
t
h
e
Ti mi ng
Ca
p
aci t or ,
CT,
b
egi ns
t o
c
h
ar ge
t
h
r o
u
g h t h
e
Ti mi ng
ano
d e of
C
R
757A
r eac h
es
±
l evel
about
one
vol t
mor e p
osi -
R
743
.
T
h
e
Ti mi ng
ng
R
Ca
p
aci t or
an
d
Resi st or ,
Resi st or
an d
ar e
‘
Swee
p
sel ect e
d
Cal
f
i ve
t
h an
t
h
e
l evel
on
t
h
e
base of
Q753A,
i t i s
r ever se
b
i ase
d
by
t
h
e
‘
¤™œ•
/ DI
V
swi t c
h
t o
p
r ovi
d
e
t
h
e var i ous
t o
i nt er r upt
t
h
e
cur r ent
f l ow
t
h r o
u
g h
Q753A
.
T
h
e
ci r cui t
swee
p
r at es
l i st e
d
on
t
h
e
f r ont
p
anel
.
Di agr am
10
s
h
ows
±
com
p
l et e
r emai ns
i n
t
h
i s
con
d
i t i on
u
nt i l
af t er
t
h
e
swee
p
r et r ace
i s
compl et e
.
As
t
h
e vol t age
at
t
h
e
emi t t er
of
Q753
B
r et ur ns t o
d
i agr am
of
t
h
e
‘
¤™œ•
/ DI
V
swi t c
h
.
T
h
e
‘
Swee
p Cal
a
d
-
i t s
or i gi nal
DC
l evel
at
t
h
e
en
d
of
t
h
e
swee
p
,
C
R
757A
i s
j
ust me
n
t
al l ows
cal i br at i on
of
t
h
i s
ci r c
u
i t
f or
accur at e
swee
p
t i mi ng
.
‘ VA
R
I A
BLE
co
n
t r ol
R
740S
( see
Ti mi ng
agai n
f or war d
bi ased
and
Q753A
conduct s
t hr ough
C
R
759
Swi t c
h
d
i agr am) ,
p
r ovi
d
es
cont i n
u
ousl y
var i abl e,
u
n
cal i -
t o
set
t
h
e
qu
i escent
cur r ent
t
h
r oug
h
Q724
.
T
h
i s
est abl i s
h
es
br at e d
swee
p
r at es
b y
var yi ng
t
h
e
c
h
ar ge
r at e
of
t
h
e
Ti mi ng
t he cor r ect
st ar t i ng
p oi nt
f or
t
h
e
swee
p
.
C
R
721
cl am
p
s t
h
e
Ca
p
aci t or
.
col l ect or
of
Q753A
abo
u
t
0
. 5
vol t
mor e
p
osi t i ve
t
h
an
t
he
base
of
Q724
w
h
en
Q753A
i s
of f
(
d
ur i ng
swee
p
an
d
r et r ace
t i me)
.
T
h
i s
h
ol
d
s t
h
e
col l ect or
of
Q753A
cl ose
t o
t
h
e
emi t t er
l evel
of
Q724
w
h
i l e
Q753A
i s
of f ,
so
t
h
at
w
h
en
i t
As
t
h
e
Ti mi ng
Ca
p
aci t or
b
egi ns
t o
c
h
ar ge p
osi t i ve
t
u
r ns on,
t
h
e
vol t age
swi ng
at
t
h
e
col l ect or
of
Q753A
i s
t owar
d
s t
h
e
vol t age
ap
p
l i e
d
t o
t
h
e
Ti mi ng
R
esi st or ,
t
h
e
gat e
smal l
an
d
t
h
e
r es
p
onse t i me
i s
s
h
or t
.
T
h
e
Swee
p
St ar t
a
d
-
of
Q733
r i ses
p
osi t i ve
al so
.
T
h
i s
pr o
d
uces ±
p
osi t i ve- goi ng
j u
st ment ,
R
843,
( i n t
h
e ’
Swee
p
Gener at or
ci r cui t ) set s
t
h
e
c
h
ange
at
t
h
e
sour ce
of
Q733
w
h
i c
h
i s
co
up
l e
d t o
t
h
e base
b
ase
vol t age
l evel
of
Q753A
.
T
h
e
col l ect or
of
Q734
i s
h
el
d
of
Q734
t
h
r oug
h
R
735
.
Q734
am
p
l i f i es
an d
i nver t s
t
h
e
at
t
h
i s
same
vol t age
l evel
b y
t
h
e
negat i ve
f ee
d
bac
k
l oop
vol t age c
h
ange
at
t
h
e so
u
r ce
of
0733
t o p
r o
d
u
ce ±
negat i ve-
Q724- Q733- Q734,
t
h
er e
b
y
set t i ng
t
h
e
st ar t i
n
g
poi nt
f or
t
h
e
goi ng
sawt oot
h
o
u
t put
.
C
R
735
cl amps
t
h
e
b
ase
of
Q734
at
sweep
.
T
h
e
l evel
est abl i s
h
ed
by
t
h
e
Swee
p St ar t a
dj u
st ment
a
b
o
u
t
- 0
. 5
vol t t o pr ot ect
Q734
dur i ng
i nst r
u
ment
t ur n-
i s
al so
connect e
d
t o
t
h
e ’
Swee
p
St ar t
Am
p
l i f i er ,
so
t
he ’
on
.
To
p
r ovi
d
e
±
l i near
c
h
ar gi ng
r at e
f or
t
h
e
Ti mi ng
Capaci -
swee
p
st ar t s at
t
h
e
same
poi nt
as
t
h
e
‘
swee
p
.
t or ,
t
h
e
swee
p
out
p
u
t
si gnal
i s
connect e
d
t o
t
h
e negat i ve
si
d e
of
C740
.
T
h
i s
f ee
d
bac
k
p
r ovi
d
es
±
const a
n
t c
h
ar gi ng
c
u
r r ent
f or
C740,
w
h
i c
h
mai nt ai ns
±
const ant
c
h
ar ge
r at e t o
‘
Sweep Out
p ut
Am
p
l i f i er
.
T
h
e
negat i ve- goi ng saw-
p
r o
d
uce
±
l i near
sawt oot
h
out
p
u
t
si gnal
.
T
h
e o
u
t
p
ut vol t age
t oot
h
si gnal
at
t
h
e
emi t t er
of
Q753
B
i s
connect ed
t o
t
h
e
cont i n
u
es
t o
go
negat i ve
unt i l
t
h
e
ci r c
u
i t i s
r eset
t
h
r o
u
g
h
base
of
Q754
t
h
r oug
h
R
755
.
Q754
am
p
l i f i es
an d
i nver t s
t
h
e
Swee
p
R
eset
M
ul t i vi br at or
.
T
h
e
out
p ut
si g
n
al
f r om
t
h
e
t
h
i s
si gnal
t o p r o
d
uce
±
p
osi t i ve- goi ng
swee
p
o
u
t p
u
t
si gnal
col l ect or
of
0734
i s
connect e
d t o
emi t t er
f ol l ower
0737
at
t
h
e
‘
S
WEEP
connect or
on
t
h
e
si
d e p
anel
.
C
R
750
p
r o-
t
h
r o
u
g h
R
736,
an
d
t o
t
h
e
Del ay
P
i c
k
of f
Com
p
ar at or st age
t ect s
Q754
i f
±
h
i g
h
- am
p
l i t
u
d
e
negat i ve
vol t age
i s
acci
d
en-
i n t
h
e ’
Sweep
Gener at or
ci r cui t
t
h
r o
u
g
h
R
741
.
t al l y
a
pp
l i ed
t o
t
h
e
‘
S
WEEP
connect or
.
Sweep Out
p
ut
B
uf f er
.
T
h
e
Swee
p
Out
p
u
t
B
uf f er
st age,
Q744,
i s
± c
u
r r ent - dr i ven st age
.
I t
pr ovi des
t
h
e
o
u
t
p
ut saw-
t oot
h
c
u
r r ent
t o
t
h
e
H
or i zont al
Am
p
l i f i er
ci r c
u
i t
.
T
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
i s
connect e
d t o
t
h
i s
st age
t o
con-
t r ol
t
h
e
‘
sawt oot
h
o
u
t
p
u
t
i n
t
h
e var i ous
h
or i zont al
mo
d
es
of
oper at i on
.
I n
t
h
e
‘
an
d
‘
™• ¤• •
D
UR
I
N
G
’
posi t i ons,
Q744
oper at es
as
d
escr i
b
e
d
.
H
owever ,
i n t
h
e ’
( D
EL
AY
E
D
S
WEEP) ,
M
I X
E
D
an
d
§
-
¥
posi t i ons,
- 12
vol t s
i s
connect e
d
t o
t
h
e
emi t t er
of
Q744
t
h r o
u
g
h
R
739
.
C
R
732
i s
f or war
d
b
i ase
d
t o
cl am
p
t
h
e emi t t er of
Q744
at
about
- 0
. 5
vol t
.
0744
i s
r ever se
b
i ased
an d
i t
bl oc
k
s t
h
e
‘
sawt oot
h
out
p
u
t
.
Ci r cui t
Descr i p
t i on- 454
‘
/
R
454A
R
esi st or
R
740,
an d
‘
S
WEEP
CA
L R
743
.
Ti mi ng
cur r ent
i s
Sweep
R
eset
E
mi t t er
F
ol l ower
.
T
he negat i ve- goi ng saw-
p r event ed
f r om
c
h
ar gi ng
t
h
e
t i mi ng
ca
p
aci t ance
.
T
h
e
t oot
h
vol t age
at
t
h
e
col l ect or
of
Q734
i s
connect e
d
t o
t
h
e
p
osi t i ve- goi ng
gat e
si gnal
f r om
Q704
r ever se
b
i ases
Q724
base of
t
h
e
Swee
p
R
eset
E
mi t t er
F
ol l ower
st age,
Q753
B
,
t
h
r oug
h
CR
709,
an d t
h
e qui escent
cur r ent
f l ow
i s
i nt er -
t
h
r o
u
g
h
R
749
.
T
h
e negat i ve- goi ng
si gnal at
t
h
e
emi t t er
of
r upt e d
.
Now
t
h
e
t i mi ng
cur r ent
t
h
r oug
h
t
h
e
Ti mi ng
R
esi s-
Q753
B
i s
co
u
p
l e
d t o
t
h
e
Swee
p
R
eset
M
ul t i vi br at or
st age
t o
f
or b
egi ns
t o
c
h
ar ge
Ti mi ng
Ca
p
aci t or ,
C740,
so
t
h
e
Saw-
det er mi ne
swee
p
l engt
h
an d t o
t
h
e
Swee
p St ar t
Am
p
l i f i er
t oot
h
Sweep
Gener at or
st age
can
p
r o
d
uce
±
sawt oot
h
o
u
t -
st age
t o
set
t
h
e
st ar t i ng
p
oi nt
f or
t
h
e
swee
p
.
I t i s
al so
con-
put
si gnal
.
T
h
e p
osi t i ve- goi ng
gat e
si gnal al so
r ever se
b
i ases
nect e
d
t o
t
h
e
‘
Swee
p
Out
p ut
B
uf f er
st age
b
y
way
of
C
R
759
t o d
i sconnect
t
h
e
Swee
p St ar t
Am
p
l i f i er
.
T
h
e
Di s-
emi t t er
f ol l ower
Q737
t o p
r ovi
d e
±
sawt oot
h
o
u
t
p
u
t
si gnal
.
connect
Am
p
l i f i er
i s
±
f ast
t ur n- of f
t r ansi st or
t o
r e
d
uce
t
h
e
C
R
749
connect ed
t o
t
h
e
base of
Q753
B
p
r ot ect s
t
h
i s
st age
swi t c
h
i ng
t i me,
an
d
i m
p
r ove
t i mi ng
l i near i t y
at
t
h
e
st ar t
of
dur i ng
i nst r ument
war m
u p
.
t
h
e
swee
p
.
Swee
p
R
eset
ρ
l t i vi br at or
.
T
h e
negat i ve- goi ng
sawt oot
h
at
t
h
e
emi t t er
of
Q753
B
i s
cou
p
l e
d
t o
t
h
e cat
h
od
es
of
C
R
760
an d
CR
761
.
T
h
ese di odes
ar e
q
ui escent l y
r ever se
bi ase
d
at
t
h
e
st ar t
of
t
h
e
swee
p
.
As
t
h
e
sawt oot
h
vol t age
at
t
h
e
cat
h
od
e
of
C
R
761
goes
negat i ve,
C
R
761
i s
f or war
d
bi ase
d
at
±
l evel
abo
u
t 0
. 5
vol t
mor e
negat i ve
t
h
an
t
h
e base
l evel
of
Q775
(
‘
S
WEEP
LEN
GT
H
cont r ol
i n
FULL
p
osi -
t i on)
.
T
h
en
t
h
e
negat i ve- goi ng
sawt oot
h
si gnal
f r om
t
h
e
Swee
p
R
eset
E
mi t t er
F
ol l ower
st age
i s
connect e
d
t o
t
h
e
base of
0775
t
h
r o
u
g
h R
776
.
Q774
an
d
Q775
ar e
connect e
d
3-
2
1

Table of Contents

Other manuals for Tektronix 454A

Preview: Operator's Handbook
Operator's Handbook20 pages

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Tektronix 454A and is the answer not in the manual?

Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

Related product manuals