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Tektronix 454A User Manual

Tektronix 454A
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gr ounde
d
- base
out
put
st age,
Q184
an
d
Q194
.
Thi s
act i on
P
r eam
p
out p ut
si gnal s
t o be
coupl e
d
t o t he
Del ay- Li ne
al l ows t he
di s
p
l aye
d
si gnal
f r om
Channel
2
t o
b
e
i nver t e
d
.
Dr i ver
st age
.
CR201
t hr ough
C
R204
cont r ol
t he
Channel
1
si gnal
out
p ut an d
C
R206
t hr ough
C
R209
cont r ol t he
Chan-
nel
2
si gnal
out
p ut
.
These
di o d
es
ar e
i n
t ur n cont r ol l ed by
Al so,
t he
Channel
2 V
er t i cal
P
r eam
p
ci r cui t
does
not
t he
Swi t chi ng
Mul t i vi br at or
st age
f or
d
ual - t r ace
d
i spl ays,
or
havezyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA±
t r i gger
p
i ckof f st age
.
To
p
r ovi
d e ± l oad
at
t he
emi t t er
b
y t he M
ODE
swi t ch
f or si ngl e- t r ace
d
i s
p
l ays
.
of
Ÿ
164
si mi l ar
t o
t
h
e
l oa
d
t
h
at
t
h e
C
h annel
1
Tr i gger
P
i c
k
of f
st age
p
r ovi
d
es at
t
h e
emi t t er
of
Q64,
C180
an d
R
180
ar e
connect ed
i nt o
t
h e
ci r cui t
.
CH
1
.
I n
t
h
e
CH
1
p
osi t i on
of
t
h e
M
OD
E
swi t c h
,
- 12
vol t s
i s
appl i e
d t o
t
h e
j u
nct i on
of
C
R
207- C
R
208
i n t
h e
VER
TI CA
L S
W
I TC
H
I
NG
C
h annel 2
Di o
d
e
Gat e
t
h
r oug
h
t
h
e
H
O
R
I Z
DI SPL
AY
swi t c
h
S1001A,
MOD
E
swi t c
h
S238A
an d
R
224
( see
si m-
Gener al
p
l i f i e
d
d
i agr am
i n
F
i g
.
3- 5)
.
T
h
i s
f or war
d b
i ases
T
h
e
V
er t i cal
Swi t c
h
i ng
ci r c
u
i t
d
et er mi nes
w
het h er
t
h
e
CR207- C
R208
an d
r ever se
bi ases
C
R
206- C
R
209
si nce
t
h
e
CH
1
an d / or t h e
C
H
2
V
er t i cal
P
r eam
p ou
t
p u
t
si gnal
i s
i n
p
u
t
t o
t h e
Del ay-
L
i ne
Dr i ver
st age
i s
at
abo
u
t
- 3
vol t s
.
connect e
d
t o
t
h e
V
er t i cal
O
u t p u
t
Am
p
l i f i er
ci r cui t
CR206- CR209
bl oc k
t
h
e
C
h annel 2
si gnal
so
i t
can
not
p
ass
( t h
r oug
h
t
h e
Del ay
L
i ne
Dr i ver
an
d
Del ay
L
i ne
st ages)
.
I n
t o
t
h
e
Del ay-
L
i ne
Dr i ver
st age
.
At
t
h
e
same
t i me
i n t
h e
t
h
e
A
L
T
an d
C
H
O
P p
osi t i ons
of
t
h e
MOD
E
swi t c
h
,
b
ot
h
Channel
1
Di o
d e Gat e,
C
R
202- C
R203
ar e
connect e
d
t o
c h annel s
ar e
al t er nat el y
di s
p
l aye
d
on
±
sh
ar e
d - t i me
basi s
.
gr ound
t
h
r oug
h R
210
.
CR
202- C
R
203
ar e
h
el
d
r ever se
F
i g
.
3- 4
s
h
ows
±
det ai l e
d
b
l oc
k
di agr am
of
t
h
e
V
er t i cal
bi ased
w
h
i l e
C
R
201- C
R204
ar e
f or war
d
bi ased
.
T
h
er ef or e,
Swi t c
h
i ng
ci r c
u
i t
.
sc
h
emat i c
of
t
h
i s
ci r c
u
i t i s
s
h
own
on
t
h e
C
h
annel
1
si g
n
al
can
p
ass
t o
t
h e Del ay- L
i ne
Dr i ver
di agr am
3
at
t
h e
r ear
of
t
h
i s
manual
.
st age
.
Di o
de
Gat e
CH 2
.
I n t
h e
CH
2
p
osi t i on
of
t
h
e
M
OD
E swi t c h
,
t
he
T
h
e
Di o
d e
Gat es,
consi st i ng
of f ou
r
d i odes eac h
,
can
b
e
above
condi t i ons
ar e
r ever se
d
.
C
R
202- C
R203
ar e
connect e
d
t
h
o
u g h
t
of
as
swi t c h
es
w
h
i c
h
al l ow
ei t her
of
t
h
e
V
er t i cal
t o
- 12
vol t s
t
h
r oug
h
S1001A,
S238A
an d
R
214,
and
C
h
annel
1
Si g
n
al
f r
om
C
h
a
n nel
1
V
e
r
t i cal
Pr ea
mp
C
h
ann
el 2
CH
2
Si g
n
al
f r
om
Ch
ann
el 2
CR
206- C
R
209
V
e
r
t i cal
Pr
eam
p
Al t er nat e
Tr ace
Sync Pu
l se
f
r
om
Sweep
Ge
n e
r
at o
r
C
R
201- C
R
204
C
H
1
Li n
ay-
Di o
d
e
e
D
r
i ve
r
Del ay
L
i
ne
__
Gat e
0
274,
1, 120
n
s)
0284
Swi t chi ng
Mu
l t i vi
br
at o
r
0215,
0225
Chopped
B
l a
nk
i
ng
Ampl i f i er
0244
R
ef e
r
e n ce
Feedb
ac k
0253
S1001A
H
O
R
I Z
DI S
PL
AY
N
or mal
Tr i gger
P
i c
k
of f
Q293
F
i g
.
3- 4
.
V
er t i cal
Swi t c
h
i ng
d
et ai l e
d
b
l oc
k
di agr am
.
Ci r cui t
Descr i pt i on
- 454A/ R454A
Ver t i cal
Si gnal
t o
V
e
r
t i cal
O
u
t
pu
t
Ampl i f i er
Chopped
B
l a
nk
i
n
g
t o
Axi s
A
mp
l i f i e
r
No
r
mal
( co
mp
osi t e)
T
r
i gge
r
Si g n
al
t o
Tr i gger
Pr eamp
3-
7

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Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

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