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Tektronix 454A User Manual

Tektronix 454A
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Ci r c
u
i t
Descr i
p
t i on- 454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
‘
/
R
454A
M
i xe
d
Swee
p
B
l an
k
i ng
Am
p
l i f i er
I n
t
h
e
M
I X
E
D
p
osi t i on
of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
,
+12
vol t s
i s
a
pp
l i e
d
t o
t
h
e
col l ect or
of
t
h
e
M
i xe
d
Swee
p
B
l an
k
i ng
Am
p
l i f i er
Q948
t
h
r ou
g
h
col l ect or
l oad
r esi st or
R
948
.
T
h
e
nor mal
’
Swee
p
un
b
l an
k
i ng
si gnal
i s
b
l oc
ke
d
b
eca
u
se
t
h
er e
i s
no
f or war
d
bi as
vol t age a
p
p
l i e
d
t o
C
R
907
an d
C
R
908
.
T
h
e
o
u
t
p ut
si gnal
f r om
t
h
e
col l ect or
of
Q948
i s
a
d
de
d t
h
r oug
h
CR
948
an d
CR
949
t o
t
h
e u
nbl an
k
i ng
si gnal
f r om
t
h
e
‘
Swee
p
Gener at or
an
d
comp
osi t e
bl an
k
i ng
i s
ac
h
i eve
d
( see
M
i xed
Swee
p
B
l an
k
i ng
M
ul t i vi
b
r at or
di s-
cussi on)
.
’
En
d
s
‘
P
ul se
Am
p
l i f i er
T
h
e
posi t i ve- goi ng
vol t age
at
t
h
e
col l ect or
of
0963
as
t
h
e
’
swee
p en
d
s
i s
connect ed
t o
t
h
e
’
E
n d
s
‘
Am
p
l i f i er ,
Q954,
t
h
r o
u
g
h
R
959
an
d C959
.
Wh
en
t
h
e
‘
S
WEEP
LEN
GT
H
cont r ol
i s
i n t
h
e
’
EN
DS
‘
p
osi t i on,
t
h
i s
p
u
l se
sat ur at es
Q954
t o pr o
d
u
ce
±
negat i ve- goi ng p
u
l se
at
i t s
col l ect or
.
T
h
i s
negat i ve- goi ng
p
ul se
i s
connect ed
t o
t
h
e
‘
Swee
p
R
eset
Mu
l t i vi br at or
st age
t o
r eset
t
h
e
‘
swee
p at
t
h
e
end
of
t
h
e
’
sweep
f or
maxi m
u
m
del aye
d
sweep
r e
p
et i t i on
r at e
.
Swee
p
St ar t
Am
p
l i f i er
I n
al l
p
osi t i ons
of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
exce
p
t
M
I X
E
D,
t
h
e
oper at i o
n
of
t
h
e
’ Swee
p
St ar t
Am
p
l i f i er
Q938A
i s
t
h
e
same
as
descr i be d
f or
t
h
e
‘
Swee
p
St ar t
Am
p
l i f i er
st age
.
I n
t
h
e
M
I X
E
D
posi t i on,
t
h
e
Swee
p
St ar t
cont r ol
R
943
i s
di scon
n
ect ed
f r om
t
h
e base of
t
h
e
am
p
l i f i er
and
t
h
e
‘ Sweep
sawt oot
h
i s
ap
p
l i ed
.
Now,
t
h
e p
oi nt
at
w
h
i c
h
t
h
e
’
Swee
p
Gener at or
wi l l
st ar t
gener at i ng
i t s
saw-
t oot
h
wavef or m
i s
const ant l y
b ei ng
c
h
anged
by
t
h
e
‘
Swee
p
sawt oot
h
.
T
he
out
p ut
wavef or m
f r om
t
h
e ’
Swee
p
Gener at or
t a
k
es
t
he
f or m
of
±
com
p
osi t e
sawt oot
h
wave-
f or m
wi t
h
t
h
e
f i r st
and
l ast
p
ar t s
occur r i ng
at
±
r at e
d
et er -
mi ned
b y
t
h
e
‘
Swee
p
Gener at or
( l ast
p
ar t
of
com
p
osi t e
swee
p b
l an
k
e
d
out ) an d t
h
e
mi
dd
l e
p
ar t
occur r i ng
at
±
r at e
d
et er mi ne
d
by
t
h
e
’
Swee
p
Gener at or
.
t i ons of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
exce
p
t
§
- Y,
t
h
e
h
or i zont al
def l ect i on
si gnal
i s
±
sawt oot
h
f r om
t
h
e
‘
Swee
p
Gener at or
ci r cui t ,
t
h
e ’
Swee
p
Gener at or
ci r cui t ,
or ±
com-
posi t e
sawt oot
h
f r om
bot
h
.
I n
t
h
e
§
-
¥
p
osi t i on,
t
h
e
h
or i -
zont al d
ef l ect i on
si gnal
i s
obt ai ned
f r om
t
h
e
C
h
annel
1
V
er t i cal
P
r eam
p t
h
r oug
h
t
h
e
Tr i gger
P
r eam
p
ci r c
u
i t
.
I n
a
dd
i t i on,
t
h
i s
ci r cui t
cont ai ns
t
h
e
h
or i zont al
magni f i er
ci r -
c u
i t
and
t
h
e
h
or i zont al
p
osi t i oni ng
n
et wor
k
.
F
i g
.
3- 16
s
h
ows
±
d
et ai l e
d bl oc
k
d
i agr am
of
t
h
e
H
or i zont al
Am
p
l i f i er
ci r c
u
i t
.
‘
sc
h
emat i c
of
t
h
i s
ci r cui t
i s
s
hown
on
d
i agr am
11
at
t
h
e b ac
k
of
t
h
i s
manual
.
I n
p
ut
P
ar a
p
h
ase
Am
p
l i f i er
T
h
e
I n
p ut
P
ar a
p
h
ase
Am
p
l i f i er
i s
± cur r ent d
r i ven
st age
wi t
h
±
l ow
i n
p
ut
i m
p
e
d
ance
.
I t
conver t s
±
si ngl e- en
d ed
i n
p
u
t
si gnal
t o ±
push- pul l
o
u
t
p
u
t
si gnal
w
h
i c
h
i s
necessar y
t o
d
r i ve
t
h
e
h
or i zont al
d
ef l ect i on
p
l at es
of
t
h
e
C
R
T
.
I n
t
h
e
‘
and
‘
™• ¤• •
D
UR
I
N
G ’ p
osi t i ons
of
t
h
e
H
O
R
I Z DI S-
PL
AY
swi t c
h
,
t
h
e
sawt oot
h
f r om
t
h
e
‘
Swee
p
Gener at or
ci r c
u
i t i s
connect e
d t o
t
h
e base
of
Q1012
t
h
r ou
g
h
R1005
.
T
h
e
’
sawt oot
h
i s
bl oc
k
ed
by
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c h
i n
t
h
e ’
Sweep
Gener at or
ci r cui t
.
I n
t
h
e
’
( D
EL
AY
E
D
S
WEEP)
p
osi t i on
of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c h
,
t
h
e ’
sawt oot
h
i s
connect e
d t o
Q1012
an
d t
h
e
‘
sawt oot
h
i s
b
l oc
k
ed
i n
t
h
e
‘
Sweep
Gener at or
ci r cui t
.
I n
t
h
e
M
I X
E
D
posi t i on
of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
,
±
com
p
osi t e
saw-
t oot
h
wavef or m
d
er i ve
d
f r om
t
h
e
o u
t
p
ut s
of
b
ot
h
t
h
e
‘
a
n
d
’ Swee
p
Gener at or
ci r cui t s
i s
connect e
d t o
t
h
e
base
of
01012
.
W
h
i c
h
ever
sawt oot
h
si gnal
i s
connect e
d t o
t
h
e
H
or i zont al
Am
p
l i f i er
pr od uces ±
cur r ent
c
h
ange
at
t
h
e
base
of
01012,
w
h
i c
h
i s
am
p
l i f i e
d t o
pr o
d
u
ce ± p
osi t i ve- goi ng
sawt oot
h
vol t age
at
t
h
e
col l ect or
.
At
t
h
e
same
t i me,
t
h
e
emi t t er of
Ÿ
1012
goes
negat i ve
an
d t
h
i s
c
h
ange
i s
con-
nect ed
t o
t
h
e
emi t t er
of
Q1016
.
I n
al l
posi t i ons
of
t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
exce
p
t
§
- Y,
t
h
e
b
ase
of
01016
i s
gr o
u
n
d e
d
so
t
h
at
Q1016
o p
er at es
as
t
h
e
emi t t er - dr i ven
sect i on
of
±
p
ar a
p
h
ase
am
p
l i f i er
.
T
h
en
t
h
e
negat i ve- goi ng
c
h
ange
at
i t s
emi t t er
i s
am
p
l i f i e
d t o pr od
uce
±
negat i ve-
goi ng
sawt oot
h
si gnal at
t
h
e
col l ect or
.
T
hu
s
t
h
e
si ngl e-
en d ed
i n
p
u
t
si gnal
h
as
been
am
p
l i f i e
d
,
an
d
i s
avai l abl e
as
±
push- pul l
si gnal at
t
h
e
col l ect or s
of
01012
an d
Q1016
.
Swee
p
Out
p
ut
B
uf f er
T
h
e
h
or i zont al
P
OSI TI O
N
cont r ol ,
R
1000A,
an
d
F
I
NE
I n
t
h
e
‘
,
‘
™• ¤• •
D
UR
I
N
G
’
an
d
§
-
¥
p
osi t i ons
of
t
h
e
cont r ol ,
R
1
00013,
ar e
al so
connect e
d t o
t
h
e b
ase
of
Q1012
.
H
O
R
I Z
DI S
PL
AY
swi t c
h
,
- 12
vol t s
i s
connect ed
t o
t
h
e
These
cont r ol s var y
t
h
e
qu
i escent
DC
l evel
at
t
h
e
base of
emi t t er
of
Q929
t
h
r oug
h
R
929
t o b
l oc
k
t
h
e
’
swee
p out -
01012,
w
h
i c
h
i n
t ur n
set s
t
h
e
q
u
i escent
DC
l evel
at
t
h
e
put
si gnal
.
I n
t
h
e ’ ( D
EL
AY
E
D
S
WEEP)
an d
M
I X
E
D
p
osi -
hor i zont al d
ef l ect i on
p
l at es
t o
det er mi ne
t
h
e
h
or i zont al
t i ons,
t
h
i s
st age
pr ovi
d
es
t
h
e
out
p ut
sawt oot
h
cur r en
t
t o
p
osi t i on
of
t
h
e
t r ace
.
t
h
e
H
or i zont al
Am
p
l i f i er
ci r cui t
.
Ci r c u
i t
o p
er at i on
i s
t
h
e
same
as
d
escr i be
d
f or
t
h
e
‘
Sweep
Am
p
l i f i er
st age
.
F
or
§
-
¥
oper at i on, t
h
e
H
O
R
I Z
DI S
PL
AY
swi t c
h
Å·
-
gr o
u
n d
s t
h
e
b
ase
of
Ÿ
1016
an
d
connect s
t
h
e
base of
Q1012
H
O
R
I ZO
N
TA
L
A
MPL
I
F
I
ER
t o
gr ound
.
T
h
i s
al l ows
t
h
e
C
h
annel
1
si gnal
f r om
t
h
e
Tr i gger
P
r eamp
ci r c
u
i t
t o be
connect e
d t o
01016
t
h
r oug
h
Gener al
R
1007
( T
R
I GG
ER
swi t c
h
set
t o
C
H
1
O
NL
Y O
R
§
- Y)
.
T
he
H
O
R
I Z
DI S
PL
AY
swi t c
h
connect s
±
vol t age
l evel
t o
T
h
e
H
or i zont al
Am
p
l i f i er
ci r c
u
i t
p
r ovi
d
es
t
h
e
out
p
u
t
t
h
e
V
er t i cal
Swi t c
h
i ng
ci r cui t
al so,
t o
l oc
k
t
h
e
Di ode
Gat e
si gnal
t o
t
h
e
C
R
T
h
or i zont al
d
ef l ect i on
p
l at es
.
I n
al l
p
osi -
st age
i n t
h
e
C
H
2
mo
d
e
( see
V
er t i cal
Swi t c
h
i ng
d
i scussi on)
.

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Tektronix 454A Specifications

General IconGeneral
BrandTektronix
Model454A
CategoryTest Equipment
LanguageEnglish

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