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Tektronix 454A User Manual

Tektronix 454A
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t o
ei t
h
er
i ncr ease
or
d
ecr ease
t
h
e
t r ace
i nt ensi t y,
or t o
co
m
-
.
T
h e
i n
p ut
si gnal s
var y
t
h e c
u
r r ent
d
r i ve
t o
t
h e emi t t er of
pl et el y
b
l an
k
por t i ons
of
t
h e d
i s
p
l ay
.
F
i g
.
3- 19
s
h
owszyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
±
01314,
w
h
i c
h pr o
d
uces
±
col l ect or
l evel
t
h at d
et er mi nes
d
et ai l e
d
b
l oc
k d
i agr am
of
t
he
Axi s
Am
p
l i f i er
ci r cui t
.
t
h e
br i l l i ance
of t h e d
i spl ay
.
T
h e
I
NT
EN
SI TY
cont r ol
set s
sc
h
emat i c
of
t
h
i s
ci r c
u
i t i s
s
h
own
on
d
i ag
r
am
16
at
t
h
e
bac
k
t
h e
q
ui escent
l evel
at
t
h e emi t t er of
Q1314
.
Wh
en
81301
i s
of
t
h
i s
manual
.
t ur ne
d
i n
t
h
e
cl oc
k
wi se
di r ect i on,
mor e
cu
r r ent
f r om
t
h
e
I
N
T
EN
SI TY
cont r ol
i s
a
dd
e d t o
t
h
e
emi t t er
ci r cui t
of
Q1314,
w
h i c
h
r esul t s
i n
an
i ncr ease
i n
col l ect or
cu
r r ent
t o
pr ovi
d
e ± b
r i g
h
t er
t r ace
.
H
owever ,
t
h e
ver t i cal
ch
o
pp
ed
T
h e
i n
p ut
t r ansi st or ,
Q1314,
i n
t h
e
I n
p
ut
Am
p
l i f i er
bl an
k
i ng,
axi s
i n
p
ut
an d
an d
unbl an
k
i ng
si gnal s
st age
i s
±
cur r ent -
d
r i ven,
l ow
i n
p
ut
i m
p
edance
am
p
l i f i er
.
I t
d
et er mi ne
w
h
et
h
er
t
h e
t r ace
i s
vi si bl e
wi t h ± gi ven
¤•
-
p
r ovi
d es
t er mi nat i on
f or
t
h
e
i nput
si gnal s
as
wel l
as
i sol a-
SI TY
cont r ol
set t i ng
( not
at
maxi mum)
.
T
h
e
ver t i cal
t i o
n
bet ween
t
h
e i n
p ut
si gnal s
an d
t
h
e
f ol l owi ng
st ages
.
T
h e
c
h
o
pp
ed b
l an
k
i ng
si gnal
b
l an
k
s t
h e
t r ace
d
u
r i ng
d
u
al - t r ace
cur r ent
si gnal s
f r om
t
h
e
var i ous
cont r ol sour ces
ar e
co
n
-
swi t c h
i ng
.
T
h
i s
si gnal
d
ecr eases
t
h
e
c u
r r ent
t
h
r oug
h
Q1314
n
ect e
d
t o
t
h e emi t t er of
Q1314
an
d
t
h
e
sum
or d
i f f er e
n ce
d
u
r i ng
t
h e
t r ace
swi t c h
i ng
t i me
t o
bl an k
t
h e
CR
T
di s
p
l ay
.
of
t h e
si gnal s
det er mi nes
t
h e
col l ect or
conduct i on
l evel
.
T
h
e
ext er nal
b
l an
k
i ng
i
n p u
t
al l ows
an
ext er nal
si gnal
con-
CR
1314
and
C
R
1318
i n
t
h
e
col l ect or
p
r ovi
d
e
l i mi t i
n g
p
r o-
nect e d
t o
t
h e
AXI S
I
NPU
T
connect or
t o
c
h
ange
t
h e
t r ace
t ect i on
at
mi ni mum
i nt ensi t y
.
Wh
en
t
h e
I
NT
EN
SI TY
con-
i nt ensi t y
.
p
osi t i ve- goi ng
si gnal
connect e
d
t o
t
h e
AXI S
t r ol
i s
set
f ul l y
count er cl oc
k
wi se
( mi n
i mum) ,
t
h e
col l ect or
I
NPU
T
connect or
d
ecr eases
t r ace
i nt ensi t y
an d
±
negat i ve-
c
u
r r ent
of
Q1314
i s
r e
d
uce
d
,
and
i t s
col l ect or
r i ses
p
osi t i ve
.
goi ng
si gnal
i ncr eases
t r ace
i nt ensi t y
.
T
h e
an d
Å·
-
C
R
1318
i s
r ever se
bi ase
d
t o
bl oc
k
t
h
e
cont r ol cur r en
t
at
t h
e
bl an k
i ng
si gnal
f r om
t h e
Swee
p
Gener at or
ci r cui t
b
l an
k
s
base of
Q1323,
a n d
CR
1314
i s
f or war
d
bi ase
d
t o
p
r ot ect
t
h
e
CR
T
d
ur i ng
swee
p
r et r ace
an
d
r ecover y
t i me
so
t h
er e
i s
t
h e
ci r cui t
by
cl am
p
i
n g
t
h e
col l ect or
of
Q1314
about
0
. 5
no
d
i s
p
l ay
on
t
h e
scr een
.
Wh
en
t
h e
an d / or
Swee
p
vol t
mor e
p
osi t i ve
t
h
an
t
h e
emi t t er
l evel
of
Q1323
.
T
h
i s
Gener at or
ci r cui t s
ar e
r eset
an
d
r ecover e
d
( see
and
l i mi t i ng
act i on
al so t a
k es p
l ace
w
h
en
±
bl an k
i ng
si gnal
i s
Swee
p
Ge
n
er at or di scussi ons f or
mor e
i nf or mat i o
n
) ,
t
h
e
a
p
pl i e
d
.
T
h
e
cl am
p
i ng
act i o
n of
C
R
1314
al l ows
Q1314
t o
next
t r i gger
p u
l se
i ni t i at es
t
h e
swee
p an d an
unbl an
k
i ng
r ecover
f ast er
t o
p
r o
d
uce
±
shar per
d
i s
p
l ay
wi t
h
sud
d en
si gnal
i s
ge
n
er at e
d
i n t
h e
or
Swee
p
Gener at or
ci r c
u
i t
c
h
anges
i n
bl a
nk
i
ng
l evel
.
At
nor mal
i nt ensi t y
l evel s,
t
h
at
goes
negat i ve
t o
al l ow
t
h
e
emi t t er c u
r r ent
of
Q1314
t o
CR
1314
i s
r ever se
bi ase
d an d
t
h
e
si gnal
f r om
Q1314
i s
r eac
h
t
h e
l evel
est abl i s
h e
d
b
y
t
h
e
I
NT
EN
SI TY
cont r ol
an
d
cou
p
l e
d t o emi t t er
f ol l ower
Q1323
t
h
r oug
h
C
R
1318
.
t
h e ot h
er
bl an
k
i ng
i
n p
ut s
.
a
nd
Unb
l a
nk
i
n g
f
r
om
Swee
p
Ge
n e
r
at o
r
81309
* ,
C1352
¤•
S
¤¥
I nput
Out put
R1301
_
Ampl i f i er
Ampl i f i er
Unb
l a
nk
i
n
g
Pu
l se
-
01314,
01324,
01334
t o
CR
T Ci r cui t
01323
01343
½
½
½
½
½
V
er
t i cal
C
h o
pp
ed
81307
Bl anki ng
Si g
n
al
f r
om
V
er t i cal
Swi t chi ng
Ci
r
cu
i t
\
\
S750A
¤™œ
/ DI
V
½
Ext e r nal
B
l a
nk
i
n
g
81308
f r
o
m
AXI S
I
NPU
T
\ \
S1001
Co
nn
ect o
r
F
i g
.
3- 19
.
Axi s Ampl i f i e
r
d et ai l e d b
l oc
k
di agr am
.
Ci r cui t
Descr i
p
t i on- 454
/
R
454A
H
O
RI Z
DI S
PL
AY
+100
V
t o
Geomet r y
A
d
j
ust me n
t
3-
35

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Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

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