Tektronix 524AD Instruction Manual
CATHODE-RAY
OSCILLOSCOPE
TYPE
S24AD
INSTRUCTION
MANUAL
MANUFACTURERS
Sunset
Highway
TEKTRONIX, INC.
OF
CATHODE-RAY
and Barnes Road •
Phone: CYpress
2-2611
AND
VIDEO
P.
0,
Box 831 • Portland
• Cables:
TYPE
TEST
Tektronix
524AD
INSTRUMENTS
7,
Oregon,
SERIAL
NUMBER
U.S.
---
A.
TYPE
S24AO
CATHOOE-tA Y OSClllOSCOPf
•
B
GENERAL DESCRIPTION
General
The
'fektronix
contained
designed
vision
vision
frames
one
ed
time
wide-band
network
high-frequency
by
ardized
switch
tion
within
transient
10
centimeter,
lOX ac-coupled
centimeter.
brator
as
cludes
composite-video-signal
variable
de
for
transmitters
With
this
picture
to
of
the
and
observed
markers
that
the
IRE
pulse-level
position
to
make
one
response.
The
vertical
megacycles, a
aids
The
sweep
fast
as
a
delayed
coupled.
Type
cathode-ray
maintenance
and
oscilloscope,
can
small
525 lines in
vertical
per
and
in pulse-level
0.1
3X
be
portions
in detail.
facilitate
amplifier
can
be
response
Standards
adds
flat
frequency
cent,
amplifier
de
an
ac
preamplifier
A built-in
system
microsecond
and
lOX magnifier, a television
sweep.
Characteristics
SWEEP
Hard-tube
tion
as
Continuously
centimeter
type,
desired.
to
triggered
SWEEP-TIME
variable,
0.01
second
524AD is a
oscilloscope specifically
and
studio
any
observed,
of
the
picture
sync-pulse
switched
to
Committee
measurements.
high-frequency
but
at
has a bandwidth
sensitivity
sensitivity
variable-duty-cycle
measurements.
provides
sync
The
CIRCUIT
RANGE
0.1
per
portable,
adjustment
equipment.
portion
individual lines.
Internally-generated
is
that
the
to
per
unblanking
or
of
from
complete
can
be
timing.
provided
in
to
limit
recommended
for
A second
response
separator,
compensa-
sacrifice
to
0.15
volts
increased
0.015
volts
calibrated
centimeter,
recurrent
microsecond
centimeter.
of
the
select-
with
stand-
to
5 me,
of
by
cali-
sweeps
and
pulse
opera-
selftele-
teleAny
The
the
best
to
per
per
in-
is
per
External
potentiometer
100-k
amplifier,
zontal
positioning
SINE-WAVE,
This
sine-wave
tude
and
degrees. Applied via
a
cludes
sweep-magnifier
ing
circuits.
Five
0.1
markers
a
slowest
intensity
a
from
is a
An
in for
0.015
centimeter
peak.
time
µsec, 0.05 µsec, 0.318 µsec
The
de-coupled
Four
0.15
three-section
ac-coupled lOX
highest
volts
AC
Continuously
DC
EXTERNAL
sweep
with
the
phase
intervals
and
40
sweeps
throughout
VERTICAL
de-coupled
volts
sensitivity,
per
centimeter.
VERTICAL-DEFLECTION
to
50
VERTICAL-DEFLECTION
SWEEP
voltage
magnification, if desired.
included.
60-CYCLE
sweep
TIME
markers
DC
unblanking
to
per
push-pull
variable
volts
can
through
PHASED
is
adjustable
can
be varied
the
sweep
and
MARKERS
are
provided
per
UNBLANKING
be used
the
sweep.
AMPLIFIER
stages
provide
centimeter.
preamplifier
distributed
giving
from
per
centimeter,
INPUT
be
coupled
de-coupled
amplifier.
horizontal-position-
and
1.59 µsec. (200
television line.)
pulse
with
uniform
Output
can
a sensitivity
SENSITIVITY
0.015
SENSITIVITY
in via
sweep
Hori-
SWEEP
in ampli-
through
permits
sensitivities
be
150
In-
of
1 µsec,
the
spot
stage
amplifier.
switched
volts
per
peak
of
to
TV
composite
and
15
volt
to
peak.
Magnifier
of
center,
speed limited
@
either
TRIGGER
video
peak,
or
SWEEP
expands
3X
to
0.1
REQUIREMENTS
signal
pulses 0.15
MAGNIFICATION
the
or
microsecond
between
to
trace
to
lOX. Magnified
per
GENERAL
0.5
15
volts
right
and
centimeter.
Continuously
centimeter
volt
peak
left
sweep
DESCRIPTION -PAGE
peak.
VERTICAL-AMPLIFIER
DC
to
10
of
0.15
10
for
meter.
volts
megacycles
sensitivity
variable
to
50
volts
megacycles
per
centimeter.
with
increased
1
from
per
centimeter,
FREQUENCY
at a maximum
the
ac-coupled
to
0.015
0.15
volts
RESPONSE
sensitivity
Two
cycles
preamplifier
volts
per
TYPE
peak
centi-
@
624AD
per
to
to
Over-compensation
selected
response,
some
with a switch
within I per
overshoot
on
of
high
to
provide
cent,
transient
frequencies
flat
to
frequency
5 me,
response.
bnt
can
be
with
rcctly
within
cycle is
cent.
from
the
three
per
variable
Frequency
dial
settings
cent
of
full scale.
between I per
varies
with
duty
with
cent
an
The
and
cycle.
accuracy
duty
99
per
VERTICAL-AMPLIFIER
Rise
time
10
0.04
per
points
value.
VERTICAL-AMPLIFIER
One
megohm
PROBE
Ten
megohms
tion.
SIGNAL-DELAY
A <lelay
0.25
microsecond
fier
to
system
he
to
displayed.
seconds.
A
variable-duty-cycle
Seven
full-scale
SO
volts,
continuously
microseconds
cent
and
shunted
INPUT
shunted
network
of
delay
permit
Total
CALIBRATOR
ranges
TRANSIF.NT
90
per
INPUT
by
IMPEDANCE
by
15
NETWORK
supplies
to
the
triggering
signal
delay
square
between
variable,
RESPONSE
between
cent
of
IMPEDANCE
45
µµf
capacitance.
µµf;
!OX
an
the
vertical-ampli-
is
0.34
wave
is
0.05
can
be
response
the
final
attenua-
additional
waveform
micro-
provided.
volts
and
read
di-
CATHODE-RAY
A
type
with
specified
CATJIODE-RAY
Four
Welded
panel
25"
61
105
60 cycles. 500
5ABP1
the
Type
524AD
as
the
optional
Tum;
kilovolts.
aluminum
and
blue
wrinkle
long, 13" wide, 16¼" high.
pounds.
POWER
to
125
volts
watts
TUBE
cathode-ray
unless
choice.
ACCELERATING
(-+·2.5
and
-1.5
CONSTRUCTION
alloy, with
case.
DIMENSIONS
\VEIGHT
REQUIREMENTS
or
210
to
at
117
or
tube
a P7
kv.)
photo-etched
250
volts
234 volts.
is
supplied
or
a
Pll
VOLTAGE
ac,
SO
is
to
@
TYPE
524AD
GENERAL
DESCRIPTION-
PAGE 2
®
Front-Panel
Controls
and
Connectors
VOLTS/CM
INPUT
SELECTOR
INPUT
INPUT
1,
2
GND
VARIABLE
ATTEN.
CAL.
VOLT-
AGE RANGE
VARIABLE
ATTEN.
BAL.
CAL.DUTY
CYCLE
Seven-position
the
vertical
Six-position
vertical
Coaxial
switch.
Binding
Variable
Varying
stage
Eight-position
ranges,
Adjusts
cathode-coupled
the
VARIABLE
Variable
stant
shortened.
limits.
amplifier,
connectors
post
resistor
this
gain.
and
turns
grid
resistor
of
one-half
Permits
amplifier
switch
connected
bias
VERTICAL
gang
connects
and
to
between
resistor
switch
the
of vertical
stage
ATTEN.
adjusting
of
AMPLIFIER
switch. Selects
to
select
vertical-deflection
INPUT
inserts
or
the
vertical-amplifier
to
the
instrument
cathodes
varies
the
selects
calibrator
are
multivibrator
duty
attenuators
off.
variable-gain
at
equal
control
time
cycle
to
attenuators
1,
INPUT
removes a capacitor
case.
of
the
coupling
stage.
voltage,
is
adjusted.
constants
is
be
of
lengthened
varied
or
sensitivity.
2,
system
cathode-coupled
between
providing
When
no
vertical
calibrator
while time
between
preamplifier
or
the
calibrator
for ac
via
the
INPUT
stages
and
seven
the
positioning
multivibrator.
one
per
at
the
or
output
de coupling.
SELECTOR
variable-gain
varies
calibrator
two
cathodes
occurs
constant
cent
and
of
99
input
the
Time
other
per
to
to
the
stage.
overall
voltage
of
this
when
con-
is
cent
CAL.
VOLTAGE
CAL.OUTPUT
PROBE
POWER
SCALE
ILLUMINA-
TION
FOCUS
INTENSITY
ASTIGMATISM
VERTICAL
POSITION
®
Calibrated
output.
Coaxial
same
Connector
Potentiometer
Potentiometer
Potentiometer
intensity.
Potentiometer
supplying
Potentiometer
stage.
varies
potentiometer
Gives
connector
voltage
to
astigmatism-grid
Since
the
average
GENERAL
continuously
as
is applied
provide
in
the
varying
adjusting
adjusting
setting
the
amplifier is de coupled,
across
variable
from
arm
of
to
vertical amplifier input.
plate
and
CRT
CONTROLS
graticule
the
de
voltage
DESCRIPTION -PAGE
the
the
voltage
the
grid
light
control-grid
grid
voltage
voltage
between
the
CAL VOLTAGE RANGE
voltage
CAL VOLTAGE
filament
circuit
of
bias
on
within
power
for a
to
vary
the
focusing
bias
on
of a
cathode-follower
cathode-ray
of
one-half
variation
the
vertical-deflection
3
the
potentiometer.
cathode-follower
brightness
anode
cathode-ray
tube.
of
the
of
step
range.
of
scale illumination.
of
the
cathode-ray
tube
voltage
phase-inverter
the
de level
plates.
step-attenuator
Provides
to
adjust
at
probe.
tube.
spot
regulator
amplifier
this
stage
the
@
TYPE
524AD
HORIZONTAL
POSITION
EXT
MARKER
(CRT
CATH)
Pocentiometer
is de coupled,
horizontal-deflection plates.
Front-panel
switch
and
setting
change
connector
through
bias
in de level
TIME
connected
a .015-µf
of
first sweep-amplifier V218A. Since
at
this
point
MARKER
through
capacitor
to
the
affects
the
EXT
cathode-ray
average
position of
tube
sweep
voltage
the
time
cathode.
amplifier
between
marker
Time
Marker
Switch
PHASE
AMPLITUDE
+GATE
-GATE
MAG.
POS.
µSEC/CM
MULTIPLIER
Six-position
and
connects
positions.
cathode-ray
Control
Variable
marker
Front-panel
30
Front-panel
tor.
Screwdriver
stage
sweep
Ganged
timing
by
circuit.
Dial
ing
to
resistor
pips.
volts
de coupled
Peak
to
permit
centers
variable
circuit.
equal
increments
Tenths
is calibrated in
and
tenths-dial
gang
marker
In
sixth
tube
delay
the
setting
binding
binding
voltage
front-panel
adjustment
at
the
resistors
Units
dial
switch
to
cathode-ray
position
cathode
start
SWEEP
post
to
binding
post
about
30 volts.
center
dial
in
controls
conjunction
reading
selects circuit
switch
to
external
of
the
markers
bias
of
clipper amplifier
GENERATOR
to
cathode
post.
to
plate
of
control
both
adjusts
fo magnified-sweep position
of
the
in
timing-capacitor
controls
timing-capacitor
dual variable
with
gives sweep-time
constants
tube
cathode
turns
off
time-marker
binding
of
gate-output
screen.
ten-position
post.
up
to
gate-output
bias
of
charging
resistors
variable resistors.
multiplying
gang
for
time-mark
circuit in five
1.5
and
amplifier
phase-inverter
circuit
generator
µsec.
thereby
amplifier. Peak
through
so
circuit
switch
and
in series
Sum
factor.
time
of
setting
that
and
increasing
multivibrator-timing
with
of
intervals
the
six switch
and
connects
amplitude
voltage
0.047-µf capaci-
sweep-amplifier
the
multivibrator-
step
units-dial read-
about
magnified
resistance
resistors.
of
SWEEP
DELAY
SWEEP
OUTPUT
FIELD
SHIFT
EXTERNAL
SWEEP
INPUT
@
TYPE
524AD
Three-tum
mines
Triggered
gering
Front-panel
sawtooth
40 volts, de coupled
Extends
pulse is missed,
External
through
potentiometer
point
on
triggered
sawtooth
sweep
on
any
connector
voltage
duration
and
front-panel connection
EXT
SWEEP
GENERAL
setting
sawtooth
has
maximum
line
of
television field.
from
simultaneously
to
of
sawtooth
cathode-follower
binding
one
ATTEN
DESCRIPTION -PAGE
with
post.
delay-timing
thereafter
to
potentiometer.
grid
bias
of
at
which delayed
repetition
the
sawtooth
synchronizes
the
sweep amplifier, de coupled
voltage-comparator
rate
sweep.
trigger
of
30
per
amplifier provides a positive-going
Fixed
so
that
with
4
voltage
second.
peak
voltage
an
extra
alternate
tube.
Deter-
is
generated.
Permits
vertical sync
field.
of
to
amplifier
trig-
about
TIME
Seven-position
circuit
and
In
remaining
or
internally-developed
multivibrator
corresponding
two
off
ganged
positons,
to
unblank
switch.
five sizes of
connects
60-cycle
cathode-ray
Selects
EXTERNAL
sine
wave
five sizes
capacitors
to
sweep
tube.
of
timing
in
multivibrator
SWEEP
amplifier,
capacitors
timing
INPUT
and
biases
in
sweep
circuit.
connector
gating
STABILITY
(EXT.
SWEEP
ATTEN.)
AMPLITUDE
(INT
60'v
SWEEP
PHASE)
SELECTOR
EXTERNAL
TRIGGER
INPUT
POWER
Ganged
for
external
Potentiometer
point.
phase
SWEEP
Ten-position
ger-amplifier
of
phase
positions
and
ger
Coaxial
Toggle
dual
recurrent
Ganged
of
input
pulse.
changer
are
arranged
delayed
connector
switch
sweeps.
sine-wave
position.
marked
potentiometer.
operation.
setting
bias
with
variable
sweep
switch
selects
output
circuit
In
the
is applied
by
in
UNDELA
in
red
to
trigger a sawtooth
an
adjustable
to
EXT
primary
Adjusts
Second
TRIGGER
on
trigger-amplifier
resistor
when
various
to
maintain
to
sweep
on
the
panel,
time
position
circuit
bias
potentiometer
SWEEP
YED
of
on
in 60-cycle
TIME
sources
of
positive
SWEEP
circuit directly.
input
triggers
generator
after
the
first
of
trigger
SELECTOR
power
transformer.
gating
provides
tube
trigger
trigger
trigger.
multivibrator
amplitude
to
adjust
phasing
switch
is
voltage
output
positions,
In
the
pass
through a sync
which
produces a second
switch.
in
region
adjustment
gain
and
circuit
in
output
which
INTERNAL
and
arranges
for
either
of
DELAYED
operating
polarity
the
trigger-
SWEEP
separator
of
bias
for
varies
60'v
trig-
trig-
GENERAL
DESCRIPTION -PAGE
@
TYPE
6
524AU
OPERATING
INSTRUCTIONS
Preliminary
COOLING
The
Type
filtered,
must
therefore
blocked,
permit
temperature
a
thermal
er
and
drops
Keep
excessive
operating
The
instrument
this
of
about
eration,
age
the
careful
left
so
the
instrument
Individual
INTENSITY
panel.
dent,
and
INTENSITY
The
SCALE ILLUM.,
beled
the
lighting
filter supplied is colored
mum
trace
presence
The
meters,
flection
To
find
therefore,
from
the
meter
settings.
meters
the
sweep time
sweep-dial
The
positions,
In
one
524AD Oscilloscope is cooled
forced-air
and
adequate
cutout
keep
it
back
to
the
dampness,
it.
CATHODE-RAY
Type
4000 volts.
the
screen
to
turn
that
the
ventilation.
be
placed
the
filter
air
does rise
instrument
spot
circulation.
switch
disconnected
a safe value.
let it
SABP
cathode-ray
has a total
With
can
if it is left
the
INTENSITY
spot
is dim
unattended.
must
too
be
FOCUS, ASTIGMATISM,
These
may
ILLUMINATED
adjustable
conditions
contrast
of
room
graticule
and
the
factors
volts
from
multiply
graticule
indicated
Similarly,
along
the
settings.
graticule
rotated
position,
controls
controls
require
control
are
graticule
for
light.
is
accurately
sweep
given in
the
centimeters
reading
by
the
to
time axis
per
centimeter
can
be
180
the
are
readjustment
settings.
of
find time,
mounted
degrees
graticule
Instructions
The
so
the
be
high
will
disconnect
until
dry.
If
dry
TUBE
CONTROLS
deflection
this
bright
long
whenever
available
are
slightly
GRATICULE
lighting
can
be
the
room.
to
provide
the
Pl
times
units
amplitude
by
the
vertical-amplifier dial
of
instrument
air
intake
clean
enough
If
the
for
some
the
temperature
is it
exposed
thoroughly
tube
amount
enough
in
one
place. Be
control
you
on
interdepen-
for
control
adjusted
The
the
phosphor
scribed
and
vertical-de-
per
centimeter.
of deflection,
of
deflection
volts
per
multiply
the
graticule
indicated
in
either
from
each
illumination
interior
reason,
the
used in
potential
of accel-
to
the
different
colored
in
by
of
by
is
not
pow-
before
dam-
to
the
leave
and
front
la-
to
suit
maxi-
in
the
centi-
centicenti-
by
the
two
other.
to
to
is
and
in
colored red,
The
red
white is
contrasts
more
the
well
satisfactory
First Time Operation
To
place
the
the
first time,
gested:
I.
2.
Connect
125 v power
connections
ing
ment
Set
INPUT
Type
the
following
to a source
(or
the
directions
Section
have
of
as
to
controls
SELECTOR CAL.,
VOLTS/CM
VARIABLE
ATTEN.
CAL. VOLTAGE RANGE
CAL.
DUTY
CAL.VOLTAGE
SELECTOR
AMPLITUDE
STABILITY
TIME
TIME
MULTIPLIER
MAGNIFIER
TIME
MARKER
3.
Turn
POWER
about
60 seconds.
4.
Set
INTENSITY
clockwise rotation.
5.
Adjust
VERTICAL
ZONTAL
TISM,
cussed
of
the
CAUTION
THIS
SIVELY
FOR
TION.
and
spot
screen.
-
SPOT
BRIGHT
LONG
POSITION,
FOCUS
is
other
position it is white.
with
the
green
photographically.
524AD in
procedure
of
210-250 v if T401
this
indicated below.
50-60 cycle, 105-
been
changed
shown
manual).
CYCLE
+SIG,
UNDELAYED
Counterclockwise
Counterclockwise
switch
to
ON
control
POSITION,
until a sharply
obtained
DO
TO
IN
NOT
BE
OR
ONE
at
the
ALLOW
EXCES-
REMAIN
filter.
operation
is
primary
accord-
in
the
Adjust-
Clockwise
Mid
range
SWEEP
100
µsec/cm
EXT
and
at
about
HORI-
ASTIGMA-
left
center
POSI-
The
for
sug-
AC
15-50
50
0
5.0
OFF
wait
¼
fo-
@
OPERATING
INSTRUCTIONS-
PAGE
@
'l'YPE
1
524AlJ
6.
Advance
trol
until a
back
until
7.
Set
the
(50
v).
8.
Advance
trol
to
wave
The
oscilloscope is
wave
calibrating
waveforms,
PUT
2
cordingly.
ABLE
cal deflection,
sweep
µSEC/CM
and
Adjust
ATTEN
time
MULTIPLIER
the
sweep
sweep
the
sweep
CAL.
VOLTAGE
the
trigger
obtain a stable
(about
connect
by
set
and
voltage.
the
the
for
then
means
3½
now
to
either
INPUT
VOL
the
of
ST
ABILITY
appears,
just
disappears.
AMPLITUDE
trace
cm
vertical
displaying
To
observe
INPUT
SELECTOR ac-
TS/CM
desired
select
the
sweep
controls.
amount
the
then
control
con-
turn
to
con-
of a square
deflection).
the
square-
other
1
or
IN-
and
VARI-
of
verti-
appropriate
TIME
and
it
5
This
be
(601\/),
and
connector.
divided
marked
of
cuit.
tions
trigger
the
trigger
marked
protion.
positions,
and
trigger
control
used
the
the
EXTERNAL
into
trigger
The
as
circuits.
sweep
15
volts
voltages
FUNCTION
from
three
vertical
The
two
in black,
signals
other
the
first sector,
starts
impluse.
(-),
the
For
satisfactory
trigger
peak
OF TRIGGER SELECTOR
selects
the
sources:
amplifier
trigger
the
(+SIG.
TRIGGER
trigger
sectors
sector
When
should
of
provides
without
provides
but
using
during
the
When
sweeps
amplitudes
should
be
SELECTOR
rotation.
positions
the
delayed-trigger
includes
those
rising
using
start
during
operation
between
be
provided.
attenuated
impulses
line
or
INPUT
One
for all
the
same
the
marked
portion
the
in
externally.
frequency
-SIG.)
coax
switch
sector,
types
cir-
posi-
delayed
( +
of
the
positions
the
falling
the
EXT
.5
volts
Larger
to
is
),
The
sweep
flexible
frequencies.
as
the
be
sired.
multivibrator
whether
wait
for
when
the
cedure
ing
clockwise,
a
just
and
10
me
can
sweep
made
to
ADJUSTMENT
The
sweep
the
for a trigger
triggered
the
STABILITY
point
where
is
to
the
trigger
sweep
appears,
disappears.
STABILITY
advance
NOTE-
(
+SIG.
to
view
quencies
will
STABILITY
above
secure a stable
The
dials
on
the
eration
STABILITY
be
readjusted
PLIER
Sweep Operation
GENERAL
circuit
is
run
of
capable
Fundamental
be
observed
recurrently
OF
STABILITY
bias
and
sweep
will
impulse.
operation
oscillation
remove
the
AMPLITUDE
the
STABILITY
and
then
When
or
-SIG.)
signals
be
the
at
of
about 2 me
necessary
control
normal
pattern.
µSEC/CM
also
may
of
dials
have
the
multivibrator.
control
when
are
critical bias
the
Type
of
control,
SWEEP
operate
is
control
trigger
using
trigger
fundamental
to
operating
524AD
synchronizing
frequencies
easily.
therefore
takes
By
the
or
triggered
STABILITY
control
recurrently
Correct
therefore
is
set
place.
source
control
decrease
the
internal
impulses
or
higher,
advance
somewhat
point
MULTIPLIER
some
effect up-
for
triggered
may
need
the
changed.
MULTI-
is
very
at
high
as
high
adjusting
sweep
can
as
de•
varies
the
determines
functioning
just
knob
it until it
fre-
the
op-
The
obtained
under
The
pro-
by
turn-
counter-
until
it
to
to
or
ADJUSTMENT
The
trigger
bias in
the
the
multivibrator.
set as
LECTOR
advance
stable
a
source
wave
TUDE
nal relative
In
trigger
amplitude
described
switch
the
trigger
trace
is a
slowly
or
sawtooth,
setting
to
general, it is
of
AMPLITUDE
stable
trace.
If
poor
the
signals
as
are
be possible
by
the
ing
should
and
synchronizing
Type
524AD is
containing
produced
to
use of
circuits.
then
connection
be
auxiliary
The
N AL TRIGGER
ADJUSTMENT
The
µSEC/CM
operator
marked
ered
approximate
horizontal
easily
sum
tiply
required
the
combination
to
portion
in
any
by
multiplying
of
the
this
figure
to
graticule
deflection of 1
MULTIPLIER
vary
time
number
MULTIPLIER
sweep
which
OF TRIGGER
AMPLITUDE
amplifier
the
After
previously,
is
impulse
the
sweep
set
to
and
which
and
the
AMPLITUDE
is
obtained.
changing
adjustment
will
change
the
start
desirable
setting
used
erratic
by
vibrating
form a stabilized
trigger
set
to
should
INPUT
the
of
the
from
the
by
ten
the
is
When
wave
the
of
the
to
required
is
experienced
to
observe
peak
limiting
SELECTOR
the
proper
be
made
connector.
OF
SWEEP
of
sweep
controls
sweep
time
graticule ( 10
.1
sec
to
of
microseconds
cm
can
TIME
dial
to
determine
entire
calibrated
10-cm
AMPLITUDE
control
thereby
reaches
sets
adjusts
STABILITY
the
trigger
correct
of
phase
sweep.
use
contacts,
and
to
control
the
such
the
AMPLI-
of
the
minimum
to
insure
repetitive
voltages,
trigger
differentiat-
EXT
the
EXTER-
TIME
position,
trigger
as a sine
the
it
switch
polarity,
TIME
allows
so
that
cm)
1 microsec.
be
setting
readings.
in
is cov-
determined
by
the
portion
centimeters.
the
the
SE-
until
sig-
when
such
may
signal
and
the
the
The
for
the
Mul-
time
of
is
a
a
TYPE
524AD
OPERATING
INSTRUCTIONS-PAGE
2
®1
The
MULTIPLIER
trol
and a continuously
the
step-control
for
the
readings
number.
for
The
overall
linearity
sweep
adjustments
J n
case
any
hand-calibrated
are
each
and
precise
accuracy
is
dependent
of
tube,
will
time
at
for
can
be
inside
section.
RECURRENT
it is
desirable
sort
dial
plying
vided
indication
sible.
bration
ing
cathode-ray
10-cm
indicated
Compensation
tubes, etc.,
adjustments
these
tenance
using
AMPLITUDE
STABILITY
sweep
is
The
Type
524AD
sweep
operation.
the
trigger
the
sweep.
chanical
between
connector
TOR
switch
because
capacitor
across
the
ward
about
long
time
currence
trigger
AMPLITUDE
The
SWEEP
triggers
control
receipt
of
The
delay
SELECTOR
SWEEP
approximate
When a composite
the
sweep-delay
tracts
the
delay,
operating
every
other
control
obtained.
triggered
inherently
simultaneously
For
contact
the
EXTERNAL
and
ground,
at
-EXT.
of
intermittent
of
.1
µf
contact.
10
volts
constant
of
the
sweep.
no
faster
adjusts
the
trigger
circuit
switch
sector.
indication
60-cycle
vertical-sync
consists
dial
added
Since
10-to-1
the
be
made
of
control
SINGLE
The
single-sweep
or
variable
numbers
variable
to
100 dial
TIME
resetting
of
on
several
sweep
but
the
within
any
setting
variations
by
the
case.
will be
to
trigger,
and
until a stable
SWEEP
sweep
beam
hand
key
determine
the
amplifier
actual
five
caused
means
found
SWEEP
have a sweep
retard
advance
circuit
provides
is
turns
TRIGGER
with
the
If
multiple
or
to
This
will
SWEEP
DELAY
than
the
operates
The
circuitry a sync
field-sync
30
bouncing
1 µf
should
capacitor
through 1 megohm
prevent
Use
minimum
setting.
DELAY
control
30
times
amount
and
the
start
only
is in
panel
of
the
television
times
per
pulse
of
a 10-step
control,
serving
dial.
divisions
range,
are
sweep-time
factors,
time
per
cent
of
the
by
of
screwdriver
Procedure
in
the
used
for
blanked
it
on
operation,
can
be
trigger
sweeps
be
will
an
immediate
dependable
will
per
second.
of
delay
of
when
the
DELAYED
markings
delay.
signal
separator
pulse.
The
second,
and
con-
with
as
indices
These
the
multi-
are
pro-
accurate
made
pos-
cali-
includ-
and
for
of
controls.
different
the
Main-
without
trigger
the
sweep
repetitive
in
single-
out
until
and
starts
a
me-
connected
INPUT
SELEC-
occur
contact,
connected
charge
and
produce
This
between
the
sweep.
the
trigger
give
enters
sweep
accepts
starts
the
the
for
the
to-
the
re-
an
ex-
the
sweep
from
after
the
delay
allows
lines in
ed,
cepted
display
a
of
detail,
long
makes
per
the
is
to
positioning
wave
Then
3X
center
both
fication will be
speeds
crease
moves
one
When
the
other
by
of
Frequenty
the
waveshape
for
pulse.
it
cent
entire
as follows:
OFF.
to
be
move
or
lOX
of
directions.
to
for
If
the
from
MAGNIFIER is
sitions
justment
section.)
for
NOTE:
In
sweep
crosecond
sweep
ity
this
the
TIME
a
SWEEP
amplifier
for
example,
quency-comparison
iliary
slow-sweep
to
the
sweep
tentimeter
control,
external
horizontal-positioning
voltages
sensitivity
the
the
meter,
for
SWEEP
deflection
peak
zero
milliseconds
accepted
the
the
the
instance
possible
or
tube
Adjust
magnified
the
1.0 µSEC/CM.
sweep
portion
magnification,
should
will
value.
full-counterclockwise
INPUT
input.
ganged
sweep.
applied
with
sync
the
field.
FIELD
60-cycle
sweep
other
SWEEP
it is
In
the
IO
per
face.
Turn
the
controls
the
MAGNIFIER
and
the
tube
The
within
speeds
the
center
A
is
amplifier.
result
EXTERNAL
switch a binding
This
for a
amplifier
adjustment
The
at
the
ATTEN.
factor
to
peak.
pulse.
sweep
FIELD
SHIFT
SHIFT
vertical-sync
delay
interlaced
MAGNIFIER
desirable
under
the
rate
524AD,
to
expand
cent
The
the
sweep-time
so
that
is
at
portion
will be
accuracy
five
in
of
the
of
turned
be
reset.
sweep
of
about
Some
if
the
SWEEP
is
connected
connection
sine-wave
measurements,
generator,
is
with
the
of
magnifier
control
this
connector.
MAGNIFIER
control
is
about
to
observation
of
The
wave
to
the
to
25
milliseconds
This
display
circuitry,
to
of
the
the
operating
sweep
the
the
of
magnified
per
excess
the
one
the
(See
10
sweep
INPUT
etc.
made
sweep
the
.25
amount
any
button
is
pulse
field.
examine a portion
fall
sweep
any
sweep
in
of
desired
procedure
MAGNIFIER
and
horizontal-
portion
center
of
control
the
wave
linearly
of
sweep
cent
for
accuracy
of
this
to
be
magnified
screen
of
the
MAG. POS.
Maintenance
cm
per
limit
post
oscillator
mi-
of
non-linear-
exceeds
position
labeled
to
the
can
for
The
connection
through
STABILITY
amplitude
circuits
operate
At
maximum
at
full clockwise,
volts
per
of
of
the
depress-
is ac-
allowing
greater
a fairly
magnifier
33.3
to
cover
of
the
the
tube.
to
either
in
the
in
magni-
sweep
will de-
amount.
when
the
two
poad-
the
of
the
EXT
sweep-
be
used,
for fre-
an
aux-
a po-
of
the
and
the
on
sweep
lOX
and
centi-
®J
OPERATING
INSTRUCTIONS-PAGE
@
TYPE
3
524AD
INT
601'\,
This
counterclockwise
circuit is
switch.
facilitate
teristics
tion
which
The
the
of
with
can
sine-wave
be
varied
a
ganged
control
by
over
control
knob,
means
STABILITY
to
plied
fier
ventional
the
and
positioning
manner.
provided
position
principal use
determination
filters, amplifiers, etc., in
swept-frequency
be
swept
at
is
provided
a 60-cycle
sweep
a ISO-degree
on
whose
the
ganged
control
the
knob.
amplifier
and
of
sweep
circuits function in
Vertical Amplifier
The
risetime
so
that
microsecond
time
that
the
rise will
centimeter
a
trace
of
limit
at
per
centimeter
The
use
fier
makes
and
ac
The
components
ability
it possible
bias
or
grid
cathode
drop,
and
VARIABLE
After a warm-up
it
should
ATTEN.
positions
of
tion
should
occur,
control
should
ABLE ATTEN.
and
forth
of
at
the
a sine
10
of
the
the
fastest
per
centimeter
vertical
take
place in a little less
of
horizontal
wave
near
megacycles
of
horizontal
de
coupling
it possible
of
to
to
cutoff
voltage
such
ATTEN
include
observe,
occurs,
the
plate
similar
BAL,
the
period
be
possible
control
to
back
without a change
the
no-signal trace.
the
VARIABLE ATTEN. BAL.
be
readjusted
control
until
no
such
Type
sweep
amplifier
will
to
a signal
for
characteristics.
FRONT-PANEL
rotate
tion occurs.
SIGNAL
The
sweep
tenth
microsecond
to
get
the
a
trigger
crosecond
circuit
crt
signal. A
occurs
beam
in
requires
of
time
unblanked
total
the
vertical
ing a quarter-microsecond
SWEEP
in
the
of
the
of
this circuit is
of
bandpass
signal
whose
range
trigger
amplitude
control
The
so
that
524AD is
time
at
the
distance,
the
upper-frequency
appear
distance.
in
the
display
de
component
example,
or
how
voltage
of
several
the
and
forth
in
the
If
while
is
being
change
in vertical posi-
DELAY
approximately
to
get
signal
delay
amplifier, includ-
delay
second
sweep
most
TIME
to
charac-
conjunc-
generators
rate.
A 60-cycle
phase
means
can
of
by
AMPLITUDE
can
be
varied
on
the
sweep
signal is ap-
the
magni-
the
con-
designed
of
one-tenth
fastest
capable
than
and
one
ampli-
the
rise-
of,
half
the
cycle
de
is
as
vertical
both
simultaneously.
makes
when
close
of a tube
zero
to
CONTROL
the
can
minutes,
VARIABLE
to
different
vertical
such a change
rotated
underway
after
in a signal de-
the
receipt
of
0.34
posi-
VARI-
back
and
of
mi-
lay line.
very
sharp
er-microsecond
before
the
the
triggering
rise,
an
appreciable
before
an
In
practice
quarter-microsecond
the
optimum
of a slower-rising
CONNECTION
Banana
to
tions
with
low
located
opening
marked
marked
factors
at
cm
are
the
horizontal-plate
at
the
A switch
to
tions
ways
labeled IRE, NORMAL,
EXT. : IRE for
with IRE
normal
response, FLAT for
tion
some
nection
nectors
tion,
tion
one-megohm
The
of
desired,
average
beam.
flection plates
approximately
should
when
to
nal
ing
and
the
TAL
positioning
a
switch
prevent
through
anced
plate
10-mc
to
5 me, flat
overshoot,
to
on
the
plates
one-megohm
the
vertical position
If
direct
The
be
they
the
horizontal
connection
the
inserting
horizontal-signal
POSITION
should
input is
should
When
the
rise,
therefore,
of
sweep
waveform
waveform
portion
adequate
it
has
to
trigger
been
permit
waveform.
TO
jacks
made
stray
the
the
is
is
the
are
directly
capacitances.
left
back
the
right-hand
be
at
in
Y2
X2
approximately
vertical-plate
on
the
the
access panel
vertical-deflection
bandwidth
minimum
response
within
and
the
deflection plates
the
access panel.
external
signal is applied
through
resistors
resistors
connection
it
is
important
potential
to
average
(measured
160
maintained
are
de
coupled.
plates
may
jumper
plugs
blocking
control
the
external
be
turned
internal-sweep
the
I-megohm
not
desired,
be
bypassed
triggering
waveform
approximately a quart-
shows
of
However,
the
on
with a slower
wave
appears.
begins
voltage
found
that
of
delay
the
DEFLECTION
provided
to
provided
display
to
permit
the
deflection
the
PLATES
These
rear,
accessible
of
the
case.
top
plate
The
and
plate. Deflection
25
volts
jacks,
and
jacks.
makes
plates
reduced
standards,
NORMAL for a
with
optimum
high-frequency
one
per
EXT. for
by
In
cent,
external
means
the
to
blocking
to
capacitors
the
vertical amplifier.
retain
control.
to
the
horizontal
to
maintain
prevent
potential
volts
on
defocusing
of
from
and
this
the
horizontal
the
the
When
is
not
be
accomplished
with
capacitors
source.
necessary,
I-megohm
The
will
then
in series
signal.
to
EXT
signals
from
resistors.
the
unused
to
ground.
has
the
screen
when
may
pass
can
develop.
additional
is
about
of
the
start
cvnnec-
plates
jacks
through
are
an
terminal
the
terminal
per
cm
volts
de
per
15
connecin
to
four
and
comply
FLAT
transient
compensa-
but
with
con-
of con-
EXT. posi-
the
deflec-
with
the
function
plates
the
correct
of
the
vertical-de-
chassis)
same
value
plates
de
coupling
exter-
by
replac-
resistors
with
HORIZON-
function for
The
TIME
SWEEP,
coupling
When
bal-
deflection
a
is
is
to
@
TYPE
524AD
OPERATING
INSTRUCTIONS -PAGE
4
The
SWEEP
available
the
ode
the
the
approximately
either
marked
signal
amplifier
the
coupled
plifier
wave.
fication pips
of
40
PHASE
up
be
control
This
mum
the
cathode
binding
position,
within
plate
follower
effects
binding
A
thirty-volt
polarity
is
de
at
Time
1 µsec,
or
to
1.5
phased
should
sweep
EXT.
The
and
first
the
the
of
of
+GATE
taken
through
component.
from
provides a good
the
markers
0.1
200
control
microseconds,
along
varies
position
is
capacitively
post
but
2-per-cent
Special Television
The
full
generally
ments
equipment.
level
that
sirable,
with
The
CAL
panel
quency
as
recommended
mittee.
bandwidth
be
or
maintenance
of
an
restricted
with
satisfactory
IRE-response
AMPLIFIER
has
been
response
Miscellaneous
SWEEP
OUTPUT
sawtooth
the
sweep-generator
isolates
the
external
post.
The
30 volts,
GATE
peak-to-peak
is available
and
from
the
a 0.05-µf
The
the
cathode
slowest
on
µsec,
per
be
distortion
marker
desired
However,
existing
bandwidth
sweep
TIME
are
the
cathode-ray
and
television line.
delays
the
sweep.
the
brightness
kept
as
of
labeled
EXT.
pip
all
subsequent
IRE
for all
facility
high-frequency
readings
provided
for signal-level
by
the
OUTPUT
binding
waveshape
the
sweep
loads
sawtooth
peak
OUTPUT
at
-GATE.
plate
capacitor
+GATE
of
the
flat-topped
speeds.
MARKERS
inserted
0.05 µsec,
the
start
allowing
The
low
as
and
trace
the
marker
coupled
MARKER.
may
timing
accuracy.
Instructions
RESPONSE
of
the
engineering
of
television
for
monitoring
it
as
low
of
position
switch
to
limit
IRE
post
appearing
tube. A cath-
generator
connected
amplitude
to
peak.
squarewave
the
binding
The
of
as
-GATE
the
gate-output
to
signal
gate-output
beam
tube
at
intervals
or
pips
The
of
the
markers
the
markers
AMPLITUDE
of
the
marker
possible
to
be
pips will
Type
signal
of
on
Standards
for
defocusing.
switch,
the
front-panel
slightly
be
524AD
measure-
circuits
the
has
been
response
as
is
consistent
levels.
the
VERTI-
the
crt
the
high-fre-
measurements,
makes
at
from
to
of
posts
remove
is de
am-
square-
intensi-
spaced
marker
to
pip.
mini-
In
the
crt
out
of
well
will
or
signal
found
is de-
access
Com-
provides
1
pulses.
sync-separator
is
particularly
usefulness
sweep
by
cal-sync
sweep
Thus,
in
trol
any
lines
gered
of
ond
30
the
ingly
viewing
tionably
uring
sync
generator.
adjusting
served
hood,
on a selected
length
spected
cation.
the
sync
+SIG
PLITUDE
is
10
lower
od,
marker
potential
and
time
pips
The
FLAT-response
flat-frequency
per
cent,
but
with
SWEEP
The
524AD
delay
establishing a coarse
from a selected
by
conjunction
and
particular
can
When
30
0.1
microsecond
for
microseconds
time.
dim
Time
markers
and
and
Individual
with
the
which
A
much
sweep
pulses
or
obtained.
microsec/cm.
marker
giving
vertical-deflection
of
from
sweep-delay
circuit
to
television
for
other
is
obtained
pulse
and
operating
with
selecting
horizontal-sync
be
observed.
using
sweep
times
per
10
cm)
the
The
resulting
and
should
hood
when
bright.
adjusting
blanking
They
the
vertical
horizontal-sync
sweep
best
technique
sync
allows
with
time
brighter
is
triggered
without
-SIG
control
Sweep
amplitude
better
amplitude
sufficiently
each
marker
their
proper
the
of
TIME
are
are
and
This
may
position
response
attendant
DELAY
which
applications.
with
time
then
actually
horizontal-sync
the
FIELD
the
SWEEP
appropriate
Hooo
delay
second.
per
centimeter
beam
each
display
be
the
ambient
MARKER
useful
the
timing
pulses
normally
pulse
delay
being
pulse
and
the
markers
picture
directly
sweep
advance
until a
speed
display
than
marker
change
to
affect
sensitivities
pip,
positions
of
to
5 me,
overshoot
system
adapts
signals
but
television
delay
from a verti-
triggering
SHIFT
DELAY con-
sweep
pulse, line,
the
sweep
With a sweep
is
second
viewed
for
generated
and
next
delay.
stable,
should
( 1
on
the
or
is
correspond-
through
light
accurately
of
the
not
group.
and
thus
required
pulses
may
with
the
to
start
to
choose a sweep
pulse
sweep
will
be
by
the
Trigger
the
trigger
clear
be
requires
for
the
accuracy.
the
the
horizontal-
displacing
on
the
switch
within
for
contains
the
system
limits
Jitter-free
signals
pulse.
button
speed,
is
trig-
speed
microsec-
screen
only
0.00003 of
is
objec-
meas-
horizontal
in
the
sync
be
viewing
the
sweep
to
be
magnifi-
obtained
horizontal
from
AM-
display
about 6 to
much
first
meth-
A
high
crt
cathode
during
the
screen.
fast
a
its
the
or
the
for
ob-
in-
if
the
the
OPERATING
INSTRUCTIONS-
PAGE
@
TYPE
6
624AD
The
.005H
useful in
sync
give
the
pulse
time
time
adjusting
between
proximately
marker
15.75 kc,
cent
to
to
pickup
direct} f
is
thus
of
H.
630 kilocycles.
RADIO-FREQUENCY
In
some
the
video
into
into
of difficulty
shielded
husky,
probe,
est
connections,
short
be
sure
possible
probe body.
Proper
operation
somewhat
and
vertical-amplifier
of
the
probe
calibrator
time
marker
and
timing, since
measurements
horizontal
63.5
set
microseconds.
to
3.15
producing
Similarly
the
transmitter
trace
may
the
station
the
oscilloscope
can
be
reduced
ground
at
all
times
ground
PROBE
connection
ADJUSTMENT
of
upon
correct
can
be
checked
VOLTS/CM
will
measuring
the
F.C.C.
in
terms
sync
megacycles,
markers
0.025 H
INTERFERENCE
locations
be
experienced
video
equipment
input.
by
use
short
signal
straps.
the
to
maintain
sweep
wh·en
adjustment
attenuators
by
waveform
be
found
horizontal-
standards
of
H.
pulses, ap-
The
200
each
marker
rf
interference
This
of
completely
leads,
using
the
directly
delay
of
the
..
Adjustment
observing
through
very
H is
.005 H
times
.5
per
is set
from
itself
or
type
and
the
short-
to
the
depends
probe
the
the
rf
probe
with
0.5
volts/cm.
the
attenuators
ance
section.
In
the
a
particular
the
524AD Oscilloscope, a
may
be
VIDEO
to
determine
the
desired
appearing
during
bandwidth
somewhat
the
LINE
event
horizontal
connected
output
that
portion
on
the
the
time
of
the
restricted
Further
it is found
purpose.
The
used
television
scope
from
524AD
indicating
the
width
whose
of
line-indicating
to
determine
system
test-chart
the
as
test
chart
wedges
frequency
the
wedges
test
chart
signal-voltage
video
being
provide
being
switch
at
instructions
are
contained
INDICATING
necessary
line
spare
to
the
jack
LINE-INDICATING
at
the
the
oscilloscope is
of
the
picture.
monitor
of
the
524AD
line-indicating
but
is
video
the
range
which
is
signal.
transmitting a mono-
Grey-scale
will
be
level,
system
depicts
scanned.
squarewave
is
determined
scanned.
0.15
in
VIDEO
or
other
picture
rear
of
will be
sweep
video
adequate
technique
and
resolution
displayed
while
the
Test-chart
by
volts/cm
for
tuning
the
Mainten-
to
observe
detail
monitor
the
cabinet
displaying
The
picture
brightened
gate.
circuit
for
can
information
by
the
portion
band-
test
signals
the
portion
to
with
The
is
this
be
of a
the
line-
of
@
TYPE
624AD
OPERATING
INSTRUCTIONS -PAGE
6
®
CIRCUIT
DESCRIPTION
.5WEEP BLOCK DIAGRAM DESCRIPTION
The
trigger
source
and
determines
SELECTOR
polarity
whether
of
input
delayed
vided.
The
trigger
quired
positive
the
sync
trigger
ing
delaying
able
sync
nization
vision frame.
trigger
wave
tube
time-marker
indicator.
sawtooth
which is applied
the
age
through a cathode-follower
square
the
with
provide
negative
grid.
tive
panel
the
positioning
cation
three,
right
inversion
sweep
DI
the
voltage.
The
sync
pulses
The
sweep-delay
amount
pulse.
The
FIELD
The
trigger
signal
The
multivibrator
signal
sweep
The
clamp
sweep
is
also
The
wave
beam
The
floating
the
The
external-gate
and
connectors
sweep.
The
magnifier
of
or
and
The
sweep
voltage
and
VERTICAL
The
INPUT
vertical-amplifier
phase
input
separator
from
the
for
separator
the
circuit
initiation
of
time
SHIFT
of
the
sweep
amplifier raises
for
triggering
used
in
generator,
voltage
amplifier.
available
unblanking
during
output
the
bias
negative
control. A switch
the
one.
to
and
D2,
several
circuit,
and
de
of
through a cathode
to
the
cathode-ray
the
power
of
the
unblanking
to
the
square-wave
which
circuit
sweep
The
left
of
screen
output
amplified
at
the
of
horizontal-deflection
the
cathode-ray
AMPLIFIER
SELECTOR
inverter
to
the
either
extracts
television
provides a means
of a sweep
after
receipt
switch
to
either
provides
circuits:
unblanking,
and
the
restorer
constant
The
sweep
at a front-panel
impedance
circuit applies a positive
period
supply
unblanking
pulse
cathode-ray
circuit
are
includes
speed
trace
is
center.
amplifier
BLOCK DIAGRAM
system
switch
trigger
trigger
the
video
of
provides
synchronized
by a factor
magnified
push-pull
selects
voltage
triggering
provides
amplifier
polarity
the
synchroniz-
composite
by
of
the
changes
field
the
level
multivibrator.
a basic
The
external
monitor
provide
de
starting
follower
sawtooth
tube
to
the
sweep.
is
added
amplifier
at
high-voltage
tube
both
pulses
the
horizontal-
selects
a multipli-
provides
tube.
switch
to
either
the
and
is
pro-
the
re-
of
input
signal.
an
adjust-
vertical
synchro-
of
a tele-
of
the
square-
clamp-
gate,
line
a linear
level
volt-
connector
converter.
turn
on
in
series
control
posi-
at
front-
with
of
ten,
both
phase
sawtooth
plates,
connects
of
two
front-panel
brator
A vertical-deflection-sensitivity
a
preamplifier
and
tions
of
tions
or
for
The
the
VOLTS/CM
the
overall
put
attenuator.
of
to
to
to
A
cathode
changing
variable-gain
Gain
ing
cathode-coupling
from
the
nal
through
from
the
the
triggering
tor
switch.
The
justs
the
sets
the
so
that
control
the
trace.
The
¼
microsecond
the
sweep
and
well
applied
Single-ended
is
converted
cathode-coupled
includes
The
for
the
fier.
Cathode-follower
distributed-amplifier
drives
The
cated
on
provides
deflection
for
normal,
width
mum
standards,
sation
4 - for
plates
access panel.
connectors
circuit.
for
selects
less sensitivity.
preamplifier
of
various
two
most
switch.
gain
follower
input
cathode-coupled
this amplifier is
grounded-grid
the
input
half supplies
circuit
VARIABLE
cathode-follower
de level
adjustment
will
not
delay
network
which
to
be
triggered
under
to
the
current
operating
the
IRE-NORMAL-FLAT-EXT
four
reduced
to
external
by
way
the
deflection plates.
output
to
balanced
phase-inverter
vertical-positioning
regulator
vertical
the
access
circuit
plates
10-mc
to
3 - for
5 me,
but
means
or
to
the
two
most
attenuators
provides a gain
sensitive
In
is
reduced
capacitance
delay
the
by
reduces
with
amplifier.
adjusted
resistors.
half feeds vertical sig-
network.
vertical
through
ATTEN.
of
of
affect
point
drivers
deflection plates.
panel
of
the
comply
connection
of
grid
the
cathode-coupled
the
VARIABLE
the
vertical position of
provides
is
long
by
the
before
the
from
the
push-pull
provides
of
the
drive
output
stage
on
connections
bandwidth,
with
connectors
the
cathode-ray
with
high-frequency
slight
to
the
BAL.
enough
an
internal
switch
sensitive posi-
positions
second
means
the
voltage
selects
for
the
of
ten
of
position
of
effects of
gain
in
by
switch-
Plate
output
Plate
output
signal
trigger-selec-
control
ATTEN.
a signal
stage,
push-pull
delay
to
network
output
which
adjustment
the
push-pull
which
switch
rear
the
vertical
tube:
IRE
compen-
deflection
permit
ampli-
in
on
observed
signal itself is
delay
control.
an
left
for
2 - for
the
overshoot,
the
located
cali-
posi-
times
the
an
in-
the
to
ad-
which
stages
of
signal
by
also
turn
lo-
panel
I -
band-
mini-
and
the
a
@
TYPE
@
CIRCUIT
DESCRIPTION -PAGE
l
624AD
AUXILIARY
The
time-mark
spaced
time
cathode-ray
ductance-capacitance
The
waves
calibrator
of
adjustable
amplitude
The
line-indicating video circuit
video signal
a positive
scope sweep,
monitor
line , n
posit
Type
provides
for
the
.!
video signal
524AD Oscilloscope.
The
internal
a 6.3-volt 60-cycle
approximately
markers
beam
set
by
output
gate
to
the
purpose
monitor
150
CIRCUIT
generator
by
intensity
with
oscillators.
oscillator
duty
calibrated
on
synchronized
apply
of
raster,
being
60-cycle
degrees
Detailed Circuit Description,
TRIGGER SELECTOR
The
trigger-selector
section, ten-position
control
ranges
tive
the
or
selects
circuits
positive
switch, SW201 is a
front-panel
the
source
to
accommodate
trigger
signals,
removes a delayed-trigger
is divided
tor
signals
other
first
into
provides
without
sector
sector
two
positions
the
provides
but
includes
sectors
for
delay-trigger
the
cuits.
In
the
marked
in-phase
verter
undelayed-trigger
in
black
or
inverted
stage
feeds
on
the
output
directly
fier.
In
the
marked
phase
stage
to
cuits
V201A is
positive
trigger
ed
signal
the
cathode
Internal
delayed
TOR
switch. In
60-cycle
inverter
plied
directly
DELAYED
in
red
or
inverted
is applied
the
trigger
the
trigger
input
polarity
from
of
60-cycle
and
undelayed· positions
ac
is applied
tube
V201A,
to
SWEEP
on
the
front
output
through
amplifier.
TRIGGER
signal is
the
V201A.
CIRCUITS
trigger-inverter
by
plate
triggering
the
undelayed
to
and
trigger
BLOCK
DIAGRAM
provides
modulating
shaped
pulses
produces
cycle
with
peak-to-peak
controls.
provides
which
is
superimposed
with
to
the
the
television video
indicating,
the
line
of
displayed
phased-sweep
ac
voltage
in
phase.
control.
of
trigger
either
and
circuit.
of
all
the
includes
The
rotation.
types
circuit.
same
positions as
the
delayed-trigger
sector
front
panel,
of
the
to
the
trigger
sector
panel,
of
the
either
the
trigger-inverter
trigger-delay
amplifier. A
obtained
selecting
or
in-phase
is
provided
of
regardless
either
signal
the
position, 6.3-volt,
the
grid
of
cathode
the
output
amplifier V207
accurately
the
from
in-
square
oscillo-
by a bright
the
com-
on
the
circuit
adjustable
three-
This
signal, ar-
nega-
or
switch
One
sec-
of
trigger
The
the
cir-
positions,
either
the
trigger-in-
ampli-
positions,
the
in-
cir-
of
invert-
from
in
both
SELEC-
trigger-
is
ap-
on
the
sweep
60-cycle
V201A is applied
circuits
sync-separator
signal. V202 is
ped
and
square
phantastron
a
state
of V205A, so
the A section
starts
the
the
B section
grid
from
is
generated
of
the
labeled
which
at
any
triggering
observing
signal.
signal,
means
signal.
The
portion
purpose
connected
grid
pulses of
well
gardless
amplifier
grid
of V203B is
R215
near
positive
clamped
of
the
off
of
amplitude
Between
+120
is
present
volts.
through
V204,
pulses
cathode
ferentiated
the
grid
at
the
tive-going
the
rundown
chassis.
voltage
to
trigger
circuits
In
taken
to
the
the
the
delayed position
from
television
phantastron,
will
over-driven
waveform
C210
the
its
grid
voltage
the
can
to
the
wave
at
rundown
grid
that
is
phantastron
of
V205B
of
of
B to
at
A-section
SWEEP
be
adjusted
point
on
is
not
is applied
the
grid
of
grid
through
of
action.
of V20SB is held above
the B section
cut
off.
When
rundown
with
V205
the
the
the
it.
has
dropped
A section,
A section
B-section
grid
is
determined
DELAY
to
the
sufficiently
cause
sawtooth.
a line of a television
For
observing
triggering
of
the
sync
sync-separator
of
the
of
triggering
a single line
should
pulses
SYNC
SEPARATOR
circuits
composite
the
of
V201B establishes a bias level
of V202B
within
of
the
and
cathode,
composite
V203B because
volts.
The
the
are
phantastron
through
the
composite
the
of
amplify,ing region
the
signal
whose
in-phase
sync-separator
returned
limited
by
which
peaks
to
of
ground
sign;,! is
,of several
pulses
the
During
at
V203.B
vertical
R217, V203A
phantastron,
not
transmitted
of
V203A
because
by
C209
of
V205B.
grid.
waveform
R212
video
amplitude.
output
tube
to
grid
is
at
ground
the
pulses
potential.
the
volts
at.
plate
the
period
grid,
the
sync
pulses
and
while
and
R218,
The
vertical
are
of
several
action.
the
cathode
sync-separator
V204.
also
accept
that
a 60-cycle
a,
flat-top-
so
V203B, V203A,
V204.
The
triggers
the
quiescent
negative
V204
In
the
conducts
the
plate
action,
When
current
and
plate.
of
it
the
grid
down
near
transfers
a positive
The
voltage
by
on
the
front
current
Internal
stable
transfer
60-cycle
to
use for
composite
of
be
the
a television
accomplished
composite
separate
the
video signal for
sweep
delay. Diode-
such
that
the
signal
are
of
V202 re-
V202 is a pulse
is applied
V203B.
+120
cmrent
The
volts
through
to a voltage
potential.
are
video
pulses
point.
V.203B
effectively
portion
below
have
rests
The
therefore
sync
this
of
that a sync
plate
drops
are
C210
the
through
of C208,
and
pulses
formed
volts
several
transmitted
to
the
grid
horizontal
R217
but
are
applied
arriving
into a nega-
to
trigger
the
of
The
the
grid
while
V204
carries
of
the
step
R230,
panel,
video
by
video
sync
the
at
the
sync
kept
to
the
grid
The
cut-
an
at
pulse
of
to
the
dif-
to
TYPE
624AD
CIRCUIT
DESCRIPTION
-PAGE
2
@
PHANTASTRON
In
the
of
tastron
tial
which
is
rent
R224,
-150
V203A
driven
screen
rises,
C211
current
flow,
plate-current
phantastron
voltage
total
state
flowing
age
positive.
connected
plate
+115
fore initially
rent
momentarily,
down
which
to
R22L
R221
which
cause
the
amplifier
versely
grid
responding
always
because
ground
main
the
become
and
restoring
so
current
R221,
quiescent
the
phantastron,
is held
by
grid
connect
held
below
flowing in
which
volts.
arrives
toward
As
the
current
carrying
to a voltage
to
the
The
grid
source
several
before
in
from
current
volts.
When
the
begins
with
is still
discharge
The
determines
in
during
phantastron
but
voltage
The
charge
be
the
but
within
voltage
too
the
plate
as
to
maintain
Since
the
from
determines
grid
plate
rising
One
turn
in
the
state
at
approximately
current
to
+120
plate-current
voltage
is
connected
When
at
the
screen-current
approaches
is
rapidly
the
flow.
When
begins
voltage
rundown
of V204 is
through
megohms,
the
phantastron
these
resistors
more
end
to
the
plate
flowing,
The
timing
charged
rundown
to
flow,
a few volts,
it
the
same
charged
into
+120
discharge
the
determines
the
rundown
tube
which
linearily
therefore
plate
voltage.
voltage
slightly
grid
above
the
linear
across
small,
voltage
grid
the
voltage
C210,
larger
end
the
SAWTOOTH GENERATOR
just
before
the
control
flowing
volts,
cutoff
divider, R223, R222,
the
negative
grid
screen-current
reduced
suppressor
high
enough
plate
to
drop
of
+120
action
connected
R220
so
that
prevents
than a fraction
of
timing
of
V204
rests
capacitor
to
about
is
initiated
the
amount
to
115
volts
current
voltage
the
acts
the
plate
with
grid
exactly
remaining
than
must
plate-current
region.
C210
were
the
grid
would
end
to
discharge
drop
flowing
grid
voltage
the
grid
of
ground
in R220
and
the
suppressor
by
screen
between
of
commences.
is
capacitor
plate
carrying
volts. C210
through
through
of
phase
as a class A linear
voltage
be
voltage
therefore
its
from
through
+225
pulse
V204,
the
cutoff.
and
the
with
it
to
allow
current
from
volts
to
and
R221
in
the
tripped,
the
which
at
approximately
C210, is
115 volts.
and
voltage
through
the
grid
plate
voltage,
of
voltage. A given
determines a cor-
on
C210
the
plate
slightly
cutoff,
If,
for
momentarily
would
proper
current
the
of
operation
the
phan-
poten-
and
R221
cur-
and
through
grid
cutoff,
screen
through
plate
begins
to
its
zero-
and
the
a positive
which
quiescent
current
grid
volt-
of a volt
C210 is
with
no
there-
plate
cur-
drops
the
grid
C210,
begins
R220
and
R220
and
of V204,
be-
operation
varies
in-
must
voltage
below
to
re-
example,
to
rise
drop,
thus
potential
constant.
discharge
R220
and
the
phan-
tastron, a change
resistors,
current
in
grid
pose
if C210
sistor,
ponentially
charge
in R220
rise. V204
control-grid
is
to
increase
to
maintain
stant
voltage
and
remains
also falls linearly.
When
V204
rent,
the plate,
screen
with
current
When
mediately
C210
through
and
and
the
phantastron
tive
V205 is
a
trigger
prescribed
the
quiescent
of
comparator
mately
cathode
just
of
the
te1·mined
DELAY
tween
When
the
carries
closely follows
proaches
which
B
section
The
riving
C209
sawtooth
rundown
tal
sync
current
resulting
from
voltage
the
change
were
the
discharge
with
current
and
R221
plate
end
the
it
discharge
across
since
the
near
C210 is
nears
cathode
which
has
suddenly
voltage
it,
and
from
plate
returns
can
charge,
C210,
R221
prevents
the
original
triggering
the
pulse
percentage
115
volts
of
the
above
the
comparator,
by
the
on
ground
the
sawtooth
phantastron
the
grid
the
time
cathode
to
differentiated
at
the
are
of
greater
voltage
action
pulses.
from
in
voltage
from a change
C210, will
simply
would
discharge
at a constant
this
righthand
ground
thereby
V204.
current
until
voltage.
comparator
state
tube
comparator
grid.
setting
the
and
voltage
of V20SB
the
grid
the
B-section
during
the B section
therefore
in
the
correct
in
voltage
to
discharge
current
time.
The
result
and
cause
would
of
C210
current
capacitor
voltage,
nearly
discharged
potential,
been
flowing
transfers
drops,
carrying
completely
is
toward
carrying
grid
it
from
quiescent
ready
to
when
the
of
of
phantastron
V20SB is held
through
The
V20SA, is
of
front
panel,
+120
of
grid
voltage
current
A section.
horizontal
amplitude
resulting
the
The
time
then
flowing
volts.
rundown
as
drop
drop.
would
falling
in a
the
fall,
the
requisite
current
value.
will fall
end
of
the
the
to
cut
off
+120
the
current
going
state
accept
tube
sawtooth
its
final value.
resistor
tube
grid
of
set
R230,
at
the
phantastron
down.
it
drops
of
the
transfers
grid
of
than
from
time
between
of
transfer
to
the A section
across
these
in
discharge
cause a change
direction
decreasing
grid
and
from
largely
the
the
cuts
volts
farther
is
another
which
V204,
rests
the
labeled
any
V20SB
sync
V205
the
to
For
example,
through
fall
off
off
of
of V204
dropping
amount
thus
With
a con-
C210
off
linearly,
this
capacitor
plate
of
and
the
cathode
through
screen,
suppressor
off
the
plate
as
fast as
grid
with
through
positive,
resumed
generates
reaches
During
the
at
approxi-
R218,
and
at a point
second
at a bias
SWEEP
point
action
begins,
cathode
until
A section,
it ap-
from
pulses
through
the
drop
phantastron
horizon-
of
cathode
a re-
drop
V204
plate
plate
R220
nega-
plate
op-
ex-
dis-
to
the
tend
the
cur-
the
im-
it
with
a
grid
the
half
debe-
at
the
ar-
in
of
@
TYPE
@
CIRCUIT
DESCRIPTION -PAGE
3
524AD
the
comparator
dent
with a horizontal
of
line
without
ger-delay
again
pulses
tion
tion
that
nate
laced fields
tively
field.
applied
will
synchronized
rundown
the
jitter.
The
rundown
as
so
is
somewhat
rate
the
vertical sync pulses,
to
When
to
synchronize
FIELD
by
extending
proximately
pulses. A
ally closed, is labeled
front
panel. In
the
junction
and
C212 is
When
the
C212 is
which
it
direction.
the
and
that
depressed
actually
ing its
decreases,
equilibrium is
charged
tion
delay caused
mately
pulses,
one,
with
or
ger
the
bias
panel control, R242, labeled
connected
reverses
charged
junction
the
the
grid
rises for a
rundown.
to
of
the
equal
so
and
the
Trigger
from
the
amplifier V207
trigger
of
V207 is
TUDE, a
connected
ative
plate
disconnect diode V208
tube
is
therefore
video
circuit is
long
as
that
the
of
the
pulses.
sweep
will be
can
the
exclusion
the
the
trigger
with
time
is
SHIFT
the
the
momentary
sync
picture
FIELD
SHIFT
time
of
made
the
time
maximum
less
than
This
triggered
therefore
of
composite
circuit
with
one
this
same
momentarily
circuit
time
of
interval
pushbutton
can
the
between
and
of
performs
one
between
FIELD
the
closed position
between
therefore
switch
to
Then,
of
current
of
to
the
110
phantastron
by
to
that
the
rundown
alternate
output
undelayed circuits is applied
SELECTOR
part
between
output
R225
charged
is opened,
to
+225
the
direction
about
100
when
R225
and
through
the
phantastron
the
extent
short
As
the
phantastron
reestablished
volts
as before,
the
temporary
the
time
two
pulses
is
interlaced fields.
SWEEP
CIRCUIT
from
the
by
means
adjustable
of a voltage
-150
of
V207 is coupled
and
and
volts
the
C212 is
R220 is
that
period
reverse
resumes.
between
are
thereafter
trigger
switch
by
volts
always
pulse,
thus
phantastron
approximately
frequency
the
60-cycle repeti-
arrangement
one
be
observed
the
other
video signal is first
the
delayed
the
fields
field unless
changed.
rundown
SHIFT
C212 is
to
about
the
negative
volts
through
of
charge
in
button
grounded
is
the
before
voltage
grid
rises
with
the
runup
skipped
of
the
means
trigger
divider
and
multivibrator
coinci-
and
a single
be displayed
trig-
vertical sync
only
of
this
vertical sync
switch,
of
this
the
is released,
reversed
momentarily
plate
C212 again
rundown
The
vertical sync
synchronized
delay circuits
C section
SW201.
of
half
of
opera-
assures
by
alter-
the
inter-
repeti-
interlaced
trigger
and
stay
the
The
change
by
ap-
norm-
on
the
switch,
grounded
110 volts.
end
R225,
and
leaves
opposite
again
voltage
continu-
of
C212
and
when
ac-
time
is approxi-
instead
to
trig-
The
the
front-
AMPLI-
with
ground.
R243,
Neg-
through
coup!-
ing
capacitor
positive-going
escent
is down.
arrives
grid
trigger
as
amplifier V207.
state,
at
V210
plate
of
V209 plate
down
to
negative-going
still
circuit
this
plate
+225
When
V210 grid,
rises
then
farther.
volts
µSEC/CM MULTIPLIER
R291,
and
is
the
gram
charged
the
plate
coupled
causes the plate
further
quiescent
conducting.
depends
SW202A
During
negative-going
of
of
is
the
held
er
tween
grid
so
that
negative
V213 below
to
by
C231
through
tive
of
appreciably
the
screen,
of
of
final
charges
+450
during
five
ten
is
very
of
At
grid
tive,
brings
the
and
quiescent
to
controlled in its rise
V213 is held below
R264, R263, R240
rise
the
arrive
starts
sweep TIME capacitor. (C225 in
as
drawn.)
so
that
region
at
the
the
gate
beam
per
per
of
same
the
of
drops
and
to
the
raises V210 grid,
state
The
on
the
and
the
sweep-clamp
about
-150
near
ground,
plate
gate
plate-current
toward
charging
to
C235,
R292
to
the
longer
to
sweep across
but
short
timing
voltage
is
only
volts,
and
which
cent
cent
of
nearly
the
termination
clamp
clamp-tube
the
plate
time
sweep circuit is
state
at
the
C221
through
multivibrator
V210 is
the
toward
drops,
Diode
from
the
drops
below
The
through
immediately
When
the
grid
plate-current
the
grid
of V209
to
is
rapidly
length
size of the
B,
and
period of
multivibrator,
tube
ground
volts
and
the
is held
from V209 depresses
+450
rate
charging
and
R293
grid
than
compared
capacitor
to
which
about
the
portion
the
beam
of
this
the
charge
linear.
of
tube
V213,
plate
down
charging
ready
for
multivibrator.
C225
V210.
conducting
negative pulse
plate
current
+225
volts
mu)tivibrator
carrying
V208 disconnects
plate
of V209 as soon
the
grid
of
V210 is
R251
resistor
to
by
the
charging
this
of V210
resulting
rise, and,
the
plate-current
potential
volts
of
voltage.
near
conduction, V210
negative
through
and
the
resumed
of
the
capacitor
size
of
conduction
the
whose
grid
R241
+225
conducts
ground.
cutoff,
at a rate
the
toward
and
V213
the
the
to
resistor,
the
ten
of
is
on
curve
the
negative
the
ground
the
restored
another
by
volts.
timing
R294.
is
time
cathode-ray
the
timing
per
the
the
The
grid
again flows
timing
and
tube
near
of
and
current
to
the
grid
In
the
and
its pljlte
from
is
cut
off
carrying
V209 up.
the
grid
of
plate
of
trigger
returned
and
through
R290
go
positive
rate
the
capacitor
just
gets
step
C226 which
through
original stable
period
R290
voltage
connected
the
chosen
time
cent
charge
screen
of
returns
to
trigger
C225,
with
of
cutoff
selected
and
R291.
of
V209, the
grid
voltage
cutoff. V213
is
normally
divid-
With
heavily
When
the
grid
plate
is
determined
capacitor,
+450
The
negato
required
constant
so
that
capacitor
of
curve
is
first six
a capacitor
gate
at
posi-
potential,
capacitor,
its
original
voltage
of
qui-
V208
and
the
V210
the
and
but
of
dia-
has
into
is
V210
by
be-
this
so
the
of
free
volts
be
for
tube
the
the
only
to
the
and
at
@
TYPE
524AD
CIRCUIT
DESCRIPTION -PAGE
4
@
The
sweep
bias
of
vibrator,
to
ground
to
flow,
a sweep.
termination
retrip
and
just
below
when
it is
trigger-amplifier
The
sweep
grid
of
is
returned
sets
the
fore
each
cathode
age
to
and
to
provides a sawtooth
connector
The
multivibrator.
to
the
so
that
rent
cutoff
cut
off.
speeded
moves
mainder
External
available
labeled
rived
from
plate
of
tween
cutoff
by
connected
-150
volts. C229
grid
of
a
peak
time
rise
impedance
from
the
plate
of
-GATE
ohms.
fore
more
V211A is a
whose
voltage
front
panel,
-150
volts,
second
matism
MAGNIFIER AND
V218A is
to
the
STABILITY
the
normally-cutoff
V209.
If
potential,
tripping
sawtooth
generator
cathode
grid
follower
the
V215A, a
unblanking
grid
it is
The
by
the
of
at
the
When
the
of
one
the
circuit
the
free-run
desired
signal.
follower V215B,
to
-150
of
V215B
sweep.
V215B
sweep
second
labeled
The
of
positive-going
driven
during
rise
L202.
loading
the
unblanking
gate
the
front
+GATE
V211B
positive-going
sweeps
The
grid
the
means
between
V211B.
value
in
of
about
is
approximately
cathode.
V211B is
at
an
wave
susceptible
cathode-follower
voltage
divider
anode
control.
grid
labeled
connected
used
of
an
of V221
of
The
the
impedance
to
the
amplifier.
voltage
is
output
time
signals
and
0.2
shape
control
negative-going
the
bias
plate
multivibrator
multivibrator
sweep
to
trigger
capacitively
volts. V214 is a
Output
SWEEP
waveform
grid
the
Cathode
effects
is
current
it will
will free
voltage
level is
the
from
at
ground
from
supplies
and
magnifier
cathode
run.
OUTPUT.
of
V212A is
multivibrator
negative
same
period
of
the
plate
follower V212B re-
on
V212A of
circuit.
of
both
panel
through
-GATE.
whose
grid
of
V211B is
plate
the
is
divider
multivibrator
grid
voltage
the
speeds
+GATE
vicinity
microseconds.
The
capacitively
to
is
negative
level
of
this
external
set
by
of
300
voltage
means
ASTIGMATISM
between
set
the
voltage
cathode-ray
SWEEP
OUTPUT
Its
through
output
cathode
adjusts
set
near
will
and
resets
immediately
A bias level
normally
sweep
the
clamp-tube
coupled
whose
clamp
potential
the
cathode
sawtooth
follower
to a front-panel
is
gated
below
that
of V212A is
polarities
connectors
Both
coupled
V210. Be-
held
R254, R255
of
V210
rise
time
pulse
output
30
volts
The
ohms
pulse
coupled
of
about
output
circuit
of
+450
of
tube,
AMPLIFIER
the
multi-
enough
commence
initiating
at
the
used
from
the
to
the
cathode
which
be-
of
volt-
section,
which
by
the
connected
V210
plate-cur-
V210 is
the
re-
are
are
de-
to
the
below
and
of
the
has
and
output
coupled
from
the
to
the
10,000
is
there-
effects.
regulator
R268, a
on
the
volts
and
pin
9,
the
for
astig-
is applied
follower
V219B.
V221
V217
networks,
back
the
SW301,
arm
age
plished
in
these
or
lOX
is
driven
V217
from
follower
cathode
of
this
and
rangement,
the
until
When
holds
the
Horizontal
able R303, a
which
point
the
on
duced
trol
V218B is a
supplying
Push-pull
common-cathode
V220.
ray-tube
lowers
neon
a de
a
the
of
quiescent-state
+160
might
cidental
and
these
Screwdriver
AMP
the
the
Screwdriver
POS.
V220
vide
sweep
at
the
A feedback
of
V220, R335, R330,
Feedback
and
the
by
is
feedback-loop
of
division in
eliminates
the
to
cathode,
cathode
of
to
tubes
drop
v. R352
C308
resistors.
size of
quiescent-state
about
horizontal
grid
way
of
R310 A
determined
labeled
the
to
magnified
diode is
+225
grid
this
the
determines
lower
in
the
Plate
V222A
cathode-follower
otherwise
grounding
CURRENT
on
so
same
MAGNIFIER,
voltage
the
produce
ratios.
With
to
grid
current
feedback
whose
of
diode-connected
connected
volts
the
plate
which
current
occurs,
diode
plate
is free
positioning
three-turn
the
grid
end
the
long
sweep
cathode-follower
the
screen
output
output
deflection
and
in series.
of
about
deflection-plate
and
provide
adjustable
the
common-cathode
adjustable
the
front
the
level
that
the
point
loop
between
of
V218A is
frequency-compensated
to
by
voltage
divider, R310,
ratio
net
the
positions,
the
effects
system.
cathode
through
of
follows
starts
grid
to
the
circuit
of
R303
lead
chassis.
is
coupling
is applied
plates
V222B,
150
R357
be excessive in
of
high-requency
ADJ
current
panel,
of
positioning
magnified
as
the
between
the
grid
provided
C.
The
amount
the
voltage
divider, R301, R310.
selects
1,
gain
switch
in
the
is
to
the
diode closely follows
to
current
at
this
rise past.
is
helical
negative
of
V217
bypasses
from
of
V218A.
obtained
through
and
The
volts
cathodes
limit
the
deflection plates. C307
R325,
on
level.
R328,
the
grid
unmagnified
stabilizes
so
3,
or
10
at
the
grid
in
either
the
grid
positive direction.
of
this
V217B is a
provided
the
between
adjusts
grid
connected
V217 A.
the
R305.
the
voltage
neon
below
the
the
The
grid
By
grid
flow in V218A.
through
potentiometer,
voltage
and
V221. C304
voltages
front-panel
voltage
by
to
the
cathode
through
tubes
the
to
potential
current
the
case
bypassing
labeled
chassis
resistor
labeled
the
of
V221
of
the
sweep
will
plate
the
gain
circuit
of
through
resistor
of feed-
division
that
is
of
of
of
level while
by
means
V221
place
the
series
volt-
accom-
of V221
the
3X
V218A
current
cathode
to
the
anode
V218A
this
ar-
V217B,
R305
adjust-
return
in-
con-
regulator
and
cathode-
fol-
two
NEZ
provide
de
level
the
near
which
of
acfor
SWEEP
adjusts
to
set
of
of
MAG.
grid
of
to
pro-
magnified
center
sweep.
and
grid
of
the
@
TYPE
@
CIRCUIT
DESCRIPTION -PAGE
5
524AlJ
amplifier. R330 is a
sistor
labeled
chassis,
back
can
zontal
front-panel
driver
SWEEP
by
C305B,
plate
capacitance
R353
to
ance
ing
operating
form
the
provides
cathode-ray
is
about
The
V602
in a Colpitts
screen
plate
used
inductors
L.F.
by
means
be
adjusted
sentitivity
sweep-time
adjustable
TIME
provides
and
R356,
the
sweep-signal
positive
adjustable
tube.
-400
TIME-MARKER
time
marks
used for
for
electron-coupled
and
screwdriver
SWEEP
of
of
the
TIME
which
the
to
accommodate
cathode-ray
calibrations. A
capacitor, C305A, labeled H.F.
on
the
chassis,
compensation
of
V220.
which
present
voltage
current
for
end
of a voltage
focusing
The
the
voltage
NE2
potential
volts.
GENERATOR
are
generated
the
oscillator
anode
at
circuit
+120
output.
capacitors
provide
intervals. V625 is a de-coupled
with
the
triode
cent
state.
the
pentode
by
the
the
pentode
triode
determines
and
thus
D630 is
not
begin
has
begun
gating
During
conducting
pedance
ing
oscillation.
well below
Magnetic
to
oscillating
limited in
Only
plate.
plied
The
pulses limited
that
positive pulses
in
turn
grid
of
shaped.
means
PLITUDE
applied
brightening
nals
The
grid
time
constants
section
section
the
the
time
cut
off in
to
conduct
its fall.
waveform.
the
quiescent period, V601A
and
loads
cutoff
energy
energy,
amplitude
short-duration
These
to
grid
pulses
V601B
of
V601B is held positive
by
are
shaped
V603
where
The
of
variable
on
to
the
cathode-ray
of
can
be
applied
through a front
MARKER
with
section
is
voltage
the
The
gain
the
the
conducting
positive-gate
to
rise
in
begins
cut
off.
level
at
which
the
quiescent
until
This
the
resulting
grid
circuit
negative
and
cathode
in
the
oscillator
maintained
by
grid
current
are
negative
grid
current
appear
by
they
of
peaked
at
L606
are
V603 is
as
resistor
front
panel.
trace.
to
panel
the
the
connector
time-marker
waveform
at a rate
the
grid
to
conduct
The
PHASE
at
which
the
the
helps
low
of
gate
current
pulses
pips
through
V601B plate.
and
again
R610, labeled AM-
tube
cathode
External
cathode-ray
adjustable
ADJ.
amount
of
the
tube
and
paralleled
for
the
grid-to-
high
while supply-
neon
divider
for
at
this
junction
by
means
with
volts,
and
Switched
the
five timing
multivibrator
in
the
determined
circuit until
and
control
this
markers
state
and
plate
of
to
improve
remains
cathode
V602,
prevent-
drives V601A
current
coil
changes
by
V602
in
this
reach
in L605
and
through
between
R607, so
applied
amplified
adjustable
Marker
pips
to
marker
labeled
control
re-
on
the
feedhori-
to
the
screw-
imped-
tubes,
which
the
of
the
the
quies-
causes
the
occurs
begin.
does
V625A
the
im-
ceases:
and
tube.
the
ap-
C609.
These
to
the
and
by
are
cause
sig-
tube
EXT
set
to
EXT.
The
external
but
must
grounding
connections
be
replaced
link
are
and
must
made
left
connected
times.
CALIBRATOR
The
CAL. VOLTAGE RANGE
power
to
the
plies de
the
desired
The
V41B
sistors
volts.
tive
variable
DUTY
constant
charging
position
tance
from
determines
current
V42A is
plate-current
V41B.
the
voltage
Rl29,
tween
During
plate of V42A
cathode
ground
The
is
tapped
lectable
plates
are
grounded
and
The
with
respect
potentiometer
CYCLE
of
circuits
of
to
one
the
other.
conduction
an amplifier
During
R131
ground
the
of
and
cathode
to
by
tap
of
multivibrator
the
grids
the
the
grid
the
time
cutoff
determined
and
and
conduction
drops
V 42B
approximately
resistor
provide
means
VOLTAGE RANGE
justable
VOLTAGE
brated,
put
potentiometer,
on
continuously-adjustable
to
the
CAL.
multivibrator
on
the
calibrator
through
cathodes
are
to
cathode)
are
returned
R127, labeled CAL.
on
the
front
grid-to-plate
can
be
varied
potentiometer
while
length
the
subtracting
grid
The
during
whose
during
this
period
by
voltage
adjustable
+225
volts.
period
below
therefore
in
cathode
various
of
the D section
switch,
R136, labeled CAL.
the
front
panel,
OUTPUT
sections V41A
their
connected
through
coupling-capacitor
arm
of
is
its
cutoff
grid
the
V42A
R130
cutoff
operates
the
voltage
front-panel
tor.
VERTICAL
The
nects
brator
INPUT
either
to
SELECTOR switch, SW2, con-
INPUT
the
vertical
removes a capacitor
provide
either
The
VOLTS/CM
ac
signal selected
switch
to
the
a
preamplifier
and
tions,
for
the
vertical-amplifier
for
through
positions
AMPLIFIER
1,
INPUT
amplifier,
from
the
de coupling.
switch,
SW3,
INPUT
two
most
by
or
the
the
resistor-capacitor
giving
less sensitivity.
first, full-clockwise position, a
.015 to .05
a
preamplifier
second position, a
per
resistance-capacitance
volts
centimeter
per
which
sensitivity
is
obtained
centimeter
has a gain
of
by
attenuator
be
opened
the
when
cathode,
at
other
to
switch
and
voltage
selects
divider.
and
plate-load
to
to
R125
The
add
-150
(posi-
and
time
the
resis-
to
ground
panel.
by
adjusting
resistance
the
time
kept
constant
below
grid-
period.
is held below
same
period
plate
rests
divider
connected
of
of V42B.
V41 B
Rl28,
be-
the
The
between
divider voltage.
follower V42B
ranges,
of
the
SW40.
provides
squarewave
CAL.
An
a cali-
ad-
out-
connec-
2
or
the
and
input
connects
cali-
inserts
circuit
the
SELECTOR
system
through
sensitive posi-
attenuators
In
the
sensitivity
is
obtained
of
.OS
ten.
to
.15
In
volts
with
the
i11serting a 10/3
in
the
input
ap-
re-
as
at
se-
or
to
of
TYPE
524AD
CIRCUIT
DESCRIPTION-
PAGE
6 @ii
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