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Tektronix 7704A User Manual

Tektronix 7704A
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sq
uare
wave
.
T
he negative-going
p
ulses
have
no
effect
on
Q1011
.
T
h
e
positive-going
pulses
turn
on
Q1011
to
prod
uce
negative-going
pulses
at
its
collector,
w
h
ic
h
are
of
sufficient
level
and
am
p
litu
de to
drive
t
h
e
Cloc
k input of
U
1010
.
U
1010
is
α
triggere
d
set-clear
(
J
-K)
flip-flo
p
connecte
d
as
α
triggere
d
(toggle)
fli
p
-flop
.
T
he negative-going
p
ulses
from
Q1011
trigger
U
1010
so
t
h
at
t
h
e
ou
t
p
uts
c
h
ange
state
with
each
negative
input
pulse
to
provide
α
one-
k
ilo
h
ertz
output
.
Out
p
ut
Am
p
lifier
T
h
e
one-
k
ilo
h
ertz
out
put of
t
h
e
Cali
b
rator
Count
d
own
stage
is
connecte
d
t
h
roug
h
Q1021
and
Q1023
to control
t
he
conduction
of
Q1025
an
d
Q1027
.
Transistors
Q1025
and
Q1027
are
connected
as
α
comparator
.
T
h
e
reference
level
at
t
he base of
Q1027
is
d
etermine
d
by
t
he
networ
k
R
1037-
R
1039-
R
1038-
R
1034-
R
1035-Q1031
.
T
he
0
.4
V
olts
a
d
j
ustme
n
t,
R1037,
is
set
to p
rovi
de acc
u
rate
output
voltage
at
t
he 0
.4
V
Calibrator
pin-
j
ack
.
T
h
e
voltage
at
t
he
collector
of
Q1027
c
h
anges
at
α
one-k
ilo
h
ertz
repetition
rate
b
etween
zero volt
and
α
level
establis
h
ed by
t
he
reference
level
at
its
b
ase
.
Outp
ut
V
oltage
Divi
d
er
T
h
e
o
u
tput
voltage
d
ivider,
ma
d
e
up
of
resistors
R1043
t h
roug
h
R
1058,
is
d
esigned
to
provi
d
e
a
low-impedance
out
put
for
all
ra
n
ges
except
40
V,
w
h
ile
provid
i
n
g
accurate
output
voltages
b
etween
four
millivolts
and
40
volts
.
(
F
our-millivolt
and 40-volt
outputs
are availa
b
le
on
internal
circuit-
boar
d
pins
.)
T
he
output
resistance
at
t
h
e
40
V
pin,
is
about
15
kilo
h
ms,
as
determine
d
by
R1041
an
d
t
h
e
equ
ivalent
resistance
of
t
he
divi
d
er
networ
k
.
T
h
e
remaining
outp
u
t
voltages
are
accurate
wit
h
α
one-mego
h
m
loa
d
or,
at
re
d
uced
output,
α
50-o
h
m
loa
d
.
2-
kH
z
CAL
Ι
BR
ATO
R
OSCI
LL
ATOR
CO
UN
TDO
WN
QI001
-Q1009
WW
I
-
U
1010
REV
.
M
A
R
1974
Switc
hL
ogic
Fig
.
2-2
.
Cali
b
rato
r
circ u
it
detaile
d b
loc
k d
iag
r
am
.
Circuit
Description
-7704A
Service
T
h
e
VER
TICA
L
M
OD
E
an
d
H
O
RIZON
TA
L
M
OD
E
switch
es
d
etermine
t
h
e
o
p
erating
mode
of
t h e
V
ertical
Interface
an
d
H
orizontal
Interface
circuits
res
p
ectively
.
Each of
t
h
ese
switch
es
is
self-canceling
; i
.e
.,
only
one
b
utton
can
b
e pressed
at
α
time
.
Specific
o
p
eration
of
t
h
ese
switc
h
es
is
descri
b
e
d
in
connection
with
t
he
circuits
t
h
ey
control
.
T
h
e
Α
and
Β
T
RIGG
ER
SO
UR
C
E
switc
h
es
con
trol
t
h
e
operation
of the Trigger Selector
circuit
.
T
h
ese
switch
es
are
also
self-canceling,
so
only
one
of
t
h
e
b
uttons
can
be
presse
d
at
α
time
.
Operation
of
t
h
ese switc
h
es
is
d
isc
u
sse
d
in
connectio
n
wit
h
t
h
e
Trigger
Selector
circ
u
it
.
In
d
icator
L
ig
h
ts
T
h
e
indicator
lig
h
ts s
h
own
in
connection
wit
h
t
h
e
mo
d
e
switch
es
indicate
w
h
ic
h
mo
d
e h
as
been
selected
.
Wh
en
one
of
t h e
p
us
hbu
ttons
is
pressed,
it
completes
t
h
e
circuit
between
t
he
associate
d
bulb and
t
h
e
+5-
V
olt
L
ig
h
ts
supply
.
Α
separate b
ul
b
is
used
for each
mode
switch pushb
u
tton
.
T
he
Α
an
d Β
TRIGG
ER
SO
UR
C
E
switc
h
es
are
also
illuminate
d to
indicate
t
h
e
trigger
source, b
u
t
only
one
bul
b
is
u
se
d
for
each switch
assem
b
ly
.
L
ig
h
t
guides
are used, so
t
h
at
t h e
button
pressed
receives
lig
h
t,
but
t
h
e
remaining
b
uttons
are
not
illuminate
d
.
T
he
power
for
t
h
e in
d
icator
lig
h
ts
is
controlle
d
b
y
t
he
rear-panel
CO
N
T
R
O
L
I
LLUM
switch
(s
h
own
on
diagram
9)
.
O
U
T
PU
T
A
MPL
I
F
I
E
R
QI021
-Q1023
Q
ιο
25
-
Q
ιο
2
7
,"
Q
ιο
3
ι
MAIN
I
N
T
ERF
AC
E
Diagram
2
s
h
ows
t
h
e
plug-in
interface
an
d
t
h
e
interconnections
b
etween
t
h
e
p
lug-in
com
p
artments,
circuit
boards,
etc
.
of
t
h
is
instrument
.
O
UT
PU
T
V
OL
TAG
E
DI
V
ID
E
R
[E
4V
O
.4
V
40
rn
V
G
ND
2-7

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Tektronix 7704A Specifications

General IconGeneral
BrandTektronix
Model7704A
CategoryTest Equipment
LanguageEnglish

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