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INSTRUCTION
MANUAL
S.W.
Millikan
Way
•
P.O.
Box
500
•
Beaverton,
Oregon
•
Phone
MI
4-0161
•
Ca les:
Tektro
nix
[
E
E
WARRANTY
E
E
'n
All
Tektronix
instruments
are
warranted
against
de ective
materials
and
workman

ship
or
one
year.
Tektronix
trans ormers,
manu actured
in
our
own
plant,
are
war

ranted
or
the
li e
o
the
instrument.
Any
questions
with
respect
to
the
war

ranty
mentioned
above
should
be
taken
up
with
your
Tektronix
Field
Engineer.
Tektronix
repair
and
replacement-part
service
is
geared
directly
to
the
ield,
there

ore
all
requests
or
repairs
and
replace

ment
parts
should
be
directed
to
the
Tek

tronix
Field
O ice
or
Representative
in
your
area.
This
procedure
will
assure
you
the
astest
possible
service.
Please
include
the
instrument
Type
and
Serial
number
with
all
requests
or
parts
or
service.
Speci ications
and
price
change
priv

ileges
reserved.
■
Copyright
©
1960
by
Tektronix,
Inc.,
Beaverton,
Oregon.
Printed
in
the
United
States
o
America.
All
rights
reserved.
Con

tents
o
this
publication
may
not
be
repro

duced
in
any
orm
without
permission
o
the
copyright
owner.
CONTENTS
E
2
E
J
Section
1
Specifications
Section
2
Operating
Instructions
Section
3
Circuit
Description
Section
4
Maintenance
Section
5
Cali ration
Procedure
Section
6
Plug-In
Characteristics
Section
7
Parts
List
and
Schematics
Section
8
Accessories
E
J
L
2
£
J
Type
532
AA
L
2
:
j
AA
Type
532
ON
1
General
Type
532
AA
The
Tektronix
Type
532
Oscilloscope
is
a
high-performance
medium-speed,
la oratory
instrument
with
plug-in
preamplifiers.
It
is
specially
engineered
to
get
extra
dependa ility
through
circuit
simplicity
and
conservative
tu e
loading.
While
achieving
the
extra
depend

a ility
o taina le
with
fewer
tu es
more
con

servatively
loaded,
the
Type
532
has
retained
the
same
precision
and
sta ility
expected
of
Tektronix
oscilloscopes,
com ined
with
per

formance
characteristics
that
will
take
care
of
most
of
the
demands
of
a
la oratory.
Letter
Series
plug-in
units
fit
the
Type
532.
All
the
versatility
of
these
plug-in
units
is
thus
availa le,
limited
only
y
the
5
-megacycle
pass
and
of
the
Type
532.
Vertical
Deflection
System
Output
Amplifier
Frequency
Response
-
de
to
5
me.
Risetime
-
.06
microseconds.
Linear
Deflection
-
8
cm.
Horizontal
Deflection
System
Sweep
Range
Twenty
-one
cali rated
speeds
from
1
µsec/cm
to
5
sec/cm.
Accuracy
-
3
per
cent.
Continuously
varia le,
uncali rated,
etween
ranges
and
to
12
sec/cm.
Magnifier
Expands
sweep
5
times
to
right
and
left
SPECIFICATIONS
of
screen
center.
Extends
fastest
sweep
speed
to
.2
µsec/cm.
Accuracy
-
5
per
cent.
Un lanking
-
DC
coupled.
Trigger
Requirements
Internal
-
2
mm
of
deflection.
External
-
.2
volts
to
40
volts.
Frequency
range
-
de
to
5
me.
Horizontal
Input
Deflection
Factor
Continuously
varia le,
.2
v/cm
to
20
v/cm.
Frequency
Response
-
de
to
300
kc.
Other
Characteristics
Cathode-Ray
Tu e
Type
T52P2
Pl,
P7
and
Pll
phosphors
optional.
Accelerating
Potential
-
4,000
volts.
Deflection
Factor
at
Plates
Vertical
-
9
v/cm.
Horizontal
-
22
v/cm.
Voltage
Cali rator
Eighteen
fixed
voltages
from
.2
milli

volts
to
100
volts,
peak-to-peak.
Accuracy
-
3
per
cent.
Waveform
-
square
wave
at
a out
1
kc.
AA
Specifications
-
Type
532
1-1
Output
Waveforms
Availa le
Power
Supply
Positive
gate
of
same
duration
as
sweep,
20
volts.
Sweep
Sawtooth
waveform,
150
volts.
Delayed
gate
with
delay
adjusta le
throughout
the
period
of
the
sweep
and
lasting
for
the
duration
of
the
sweep,
20
volts.
A
sample
of
the
vertical
signal,
pass-
and
de
to
2.5
me
with
a
50
µµf
capac

itive
load.
Output:
.9
volts
per
cm
of
deflection.
Vertical
Beam-Position
Indicators
Indicator
lights
show
direction
of
eam
when
it
is
positioned
off
the
screen
vertically.
Electronic
Regulation
Power
Requirements
-
105
to
125,
or
210
to
250
V,
50-60
cycles,
475
watts
with
the
Type
D
Plug-In
Unit.
Mechanical
Specifications
Ventilation
-
filtered
forced-air
ventilation.
Finish
-
photo-etched,
anodized
panel,
lue
wrinkle
enameled
ca inet.
Dimensions
-
25
”
long,
13"
wide,
16
3/4"
high.
Weight
-
52
pounds.
Fonctions
o
Controls
and
Connectors
TRIGGERING
MODE
(red
kno )
Four-position
switch
arranges
trigger
circuits
for
four
kinds
of
triggering:
AUTOMATIC,
AC
FAST,
AC
SLOW
and
DC.
TRIGGER
SLOPE
Six-position
switch
selects
source
of
trigger
signal
and
converts
to
negative-going
output,
either
negative-going
or
positive
going
input.
TRIGGER
INPUT
Coaxial
connector
to
triggering
circuits
through
EXT.
positions
of
TRIGGER
SLOPE
switch.
STABILITY
Control
for
adjusting
the
sta ility
of
the
sweep
circuits
for
a
sta le
supply.
The
control
has
a
PRESET
position
suita le
for
most
triggering
applications.
TIME/CM
Eight-position
switch
selects
timing
capacitors
to
determine
sweep
speeds,
and
determine
duration
of
trigger
-holdoff
period.
MULTIPLIER
Six-position
switch.
Three
positions
place
precision
charging
resistors
in
series
with
timing
capacitors
to
determine
sweep
speeds
in
conjunction
with
selected
timing
capacitor.
Three
positions,
marked
in
red,
place
adjusta le
charging
voltages
in
series
with
timing
capacitors
for
continuous
control
of
sweep
speeds.
5X
MAGNIFIER
(red
kno )
Two-position
switch
removes
or
inserts
attenuator
in
sweep
amplifier
to
change
sweep
speeds
y
a
factor
of
five.
HORIZONTAL
DISPLAY
Three-position
switch
connects
sweep
amplifier
to
internal
sweep
generator
in
one
position,
or
to
front
panel
connector
directly
or
through
10-1
fixed
attenuator
in
second
and
third
positions.
1-2
Specifications
-
Type
532
AA
EXTERNAL
SWEEP
ATENUATOR,
10-1
Continuously
adjusta le
gain
control
on
horizontal
amplifier.
Switched
out
of
circuit
for
internal
sweeps.
EXTERNAL
SWEEP
IN
Front-panel
connector
to
horizontal
amplifier
through
HORIZ

ONTAL
DISPLAY
switch.
Magnifier
must
e
switched
to
ON
for
undistorted
10
-cm
deflection.
HORIZONTAL
POSITION
Positions
trace
along
horizontal
axis.
SQUARE
-WAVE
CALIBRATOR
( lack
kno )
Nine-position
switch
selects
nine
taps
on
precision
voltage
divider
in
cali rator
circuit.
Provides
accurate
voltages
of
.2,
.5,
1,
2,
5,
10,
20,
50,
and
100
volts
in
VOLTS
position,
or
milli

volts
in
the
MILLIVOLTS
position
of
the
red
concentric
control
kno .
MILLIVOLTS
-
VOLTS
1000
-to-
1
voltage
divider
to
give
either
volts
or
millivolts
output.
CAL
OUT
UHF
coax
front-panel
connector
from
the
cali rator.
VERT
SIG
OUT
Front-panel
inding
post
supplies
a
sample
of
the
vertical
signal
for
operation
of
auxiliary
equipment.
+
GATE
OUT
Front-panel
inding
post
supplies
positive
20-volt
square
pulse,
de
coupled
through
cathode
follower,
synchronized
with
the
internal
sweep.
SAWTOOTH
OUT
Front-panel
inding
post
supplies
150-volt
positive-going
saw

tooth
de
coupled
through
cathode
follower,
synchronized
with
the
internal
sweep.
GATE
DELAY
Front-panel
control
adjusts
delay
time
of
delayed
gate.
Delay
is
adjusta le
y
any
percentage
of
the
sweep-sawtooth
time.
DELAYED
GATE
Front-panel
connector
de
connected
to
cathode-follower
output
delivers
20-volt
positive-going
gate
delayed
according
to
the
setting
of
the
GATE
DELAY
control.
POWER
On-off
switch
primary
of
power
transformer
and
ventilating-
fan
lead.
FOCUS
Adjusta le
voltage
for
the
cathode-ray
tu e
focusing
grid.
INTENSITY
Bias
adjustment
to
cathode-ray
tu e
control
grid.
ASTIGMATISM
Adjusta le
voltage
for
the
astigmatism
grid
of
the
cathode

ray
tu e.
SCALE
ILLUM
Adjusta le
series
resistor
controls
the
voltage
across
the
graticule
lights.
Beam-position
indicators,
unla eled,
marked
with
arrows.
The
arrow
nearest
the
illuminated
indicator
shows,
which
way
the
eam
is
off
the
screen
if
it
cannot
e
seen.
AA
Specifications
-
Type
532
1-3
Rear
of
Ca inet
CRT
CATHODE
Binding
post
connects
to
crt
cathode
through
high-voltage
capacitor.
Input
impedance
8k
to
15k.
Discharge
time
constant
a out
15
milliseconds.
Preliminary
Instructions
Cooling
e
used
to
convert
deflections
in
centimeters
into
volts
and
seconds.
Vertical
sensitivities
are
cali rated
in
volts
per
centimeter,
and
horizontal
sweep-times
are
cali rated
in
sec-
The
Type
532
Oscilloscope
is
cooled
y
filtered,
forced-air
ventilation.
The
instrument
must
therefore
e
placed
so
the
air
intake
is
not
locked,
and
the
filter
must
e
clean
enough
to
permit
adequate
air
circulation.
If
the
interior
temperature
does
rise
too
high
for
some
reason,
a
thermal
cutout
switch
will
disconnect
the
power
and
keep
it
disconnected
until
the
temperature
drops
to
a
safe
value.
Cathode-Ray
Tube
Controls
The
Tektronix
Type
T52
Cathode-ray
tu e
in
this
instrument
has
a
total
accelerating
voltage
of
4,000
volts.
The
spot
intensity
with
this
amount
of
acceleration
can
e
right
enough
to
damage
the
screen
if
the
spot
is
left
in
one
place.
Be
careful
not
to
leave
a
fixed
right
spot
on
the
screen.
Turn
the
INTENSITY
control
counterclockwise
so
that
the
spot
is
dim
whenever
you
leave
the
instru

ment
unattended.
The
separate
FOCUS,
ASTIGMATISM
and
INTENSITY
controls
are
somewhat
interdepend

ent,
and
may
require
readjustment
for
different
INTENSITY
control
settings.
onds
per
centimeter
which
if
multiplied
y
centimeters
of
deflection
,
give
volts
andseconds.
The
graticule
can
e
mounted
in
either
of
two
positions
rotated
180
degrees
from
each
other.
In
one
position,
the
graticule
illumination
is
colored
red,
and
in
the
’
other
position
in
white.
The
white
will
reproduce
well
photo

graphically.
First-Time
Operation
First
get
a
trace
on
the
screen
y
the
simplest
method,
and
then
proceed
with
the
presentation
you
want
after
you
get
an
idea
of
the
functions
of
the
controls.
To
get
a
trace
on
the
screen,
insert
a
preamplifier,
for
example
the
Type
D,
and
proceed
as
follows
:
Turn
the
POWER
switch
to
OFF.
Connect
the
power
cord
to
a
source
of
117
-volt,
60-
cycle
power.
Then
set
the
front-panel
controls
as
follows:
INTENSITY
Counterclockwise
(CCW)
Illuminated
Graticule
FOCUS
center
The
adjusta le
graticule-lighting
control,
la eled
SCALE
ILLUM.
,
can
e
adjusted
to
suit
the
lighting
conditions
of
the
room.
The
colored
filter
supplied
is
colored
to
provide
the
maximum
trace
contrast
for
the
P2
phosphor
in
the
presence
of
room
light;
The
graticule
is
accurately
scri ed
in
centi

meters
and
fifths
of
centimeters.
These
scale
markings
and
the
cali rated
fixed
vertical

deflection
sensitivities
and
sweep
times,
can
ASTIGMATISM
POWER
TRIGGERING
LEVEL
STABILITY
(red
kno )
TRIGGER
SLOPE
center
ON
CCW
CW
(S/N
101-5419)
CCW
(S/N
5420-5665)
PRESET
(S/N
5666-up)
+
INT.
1-4
Specifications
-
Type
532
AA
AA
Operating
Instructions
-
Type
532
2-1
TRIGGERING
MODE
(red)
AUTOMATIC
TIME/CM
100
MICROSEC
MULTIPLIER
2
HORIZONTAL
DISPLAY
INTERNAL
SWEEP
HORIZONTAL
POSITION
center
SQUARE-WAVE
CALIBRATOR
2
VOLTS,
MILLIVOLTS,
OFF
VOLTS
Connect
a
lead
from
the
INPUT
A
terminal
of
the
Type
D
Preamp
to
the
CAL.
OUT
terminal.
INPUT
SELECTOR
INPUT
A,
AC
MILLIVOLTS/CM
100
VERTICAL
POSITION
center
MV/CM
MULTIPLIER
50
VARIABLE
Clockwise
(CW)
When
the
POWER
switch
has
een
turned
on
for
a out
one
minute,
turn
the
INTENSITY
control
clockwise
until
you
can
see
a
trace
on
the
screen.
Now
ack
off
the
red
STABILITY
kno
at
the
top
center
of
the
oscilloscope
until
the
waveform
is
sta le
(S/N
101-5419).
Adjust
the
FOCUS,
INTENSITY
and
ASTIG

MATISM
controls
for
a
sharp
line.
Position
the
trace
near
the
screen
center
with
the
HORIZONTAL
POSITION
and
the
VERTICAL
POSITION
controls.
Triggering
Mo es
Automatic
You
are
now
displaying
the
cali rator
wave

form,
whose
repetition
rate
is
a out
one
kilo

cycle,
and
whose
amplitude
is
two
volts,
peak-
to-peak,
with
the
AUTOMATIC
mode
of
trigger

ing.
This
is
the
simplest
mode
of
triggering.
It
is
useful
for
general
purpose
viewing,
and
will
operate
satisfactorily
for
a
wide
variety
of
trigger
signals
whose
repetition
rates
are
etween
sixty
cycles
and
a out
two
megacycles.
AC
Slow
When
you
have
a
good,
well
focused
trace
of
the
cali rating
waveform
y
the
AUTOMATIC
mode
of
triggering,
try
the
other
three
TRIG

GERING
MODE
switch
positions.
Turn
the
switch
to
the
AC
SLOW
position.
Leave
the
STABILITY
control
where
you
had
it
set
for
the
AC
AUTO
triggering
or
advance
it
until
the
sweep
starts
and
ack
it
off
a out
ten
degrees
(S/N
101-5665).
Advance
the
TRIGGER

ING
LEVEL
control
clockwise
until
you
get
a
sta le
trace
again.
There
may
e
a
con

sidera le
range
of
the
TRIGGERING
LEVEL
control
over
which
you
can
get
a
sta le
trace,
and
the
start
of
the
trace
will
move
up
and
down
the
edge
of
the
square
wave
within
this
range.
Notice
that
the
trace
starts
on
the
upgoing
part
of
the
cali rator
square
wave.
Now
turn
the
TRIGGER
SLOPE
switch
to
the
-INT.
position,
and
readjust
the
TRIGGERING
LEVEL
to
o tain
a
sta le
trace
again.
Notice
now
that
the
trace
starts
on
the
down-going
portion
of
the
trace
and
that
the
position
of
the
start
can
again
e
changed
somewhat
with
the
TRIGGERING
LEVEL
control.
DC
Triggering
Now
turn
the
TRIGGERING
MODE
switch
to
DC.
Adjust
the
LEVEL
control
for
straight
triggering,
and
then
position
the
trace
with
the
VERTICAL
POSITION
control.
You
will
notice
that
triggering
occurs
at
a
vertical
level
on
the
screen
selected
y
the
LEVEL
control
and
that
the
triggering
point
changes
relative
to
the
waveform
as
the
waveform
is
positioned
vertically.
This
effect
will
e
more
noticea le
if
you
look
at
a
low-frequency
sine
wave.
This
triggering
position
is
most
useful
for
low-frequency
signals.
It
is
not
suita le
for
applications
where
the
de
level
is
changing
such
as
when
the
Type
CA
Dual-Trace
Unit
is
eing
used.
AC
Fast
In
the
AC
FAST
position
of
the
TRIGGERING
MODE
switch,
the
circuit
is
quite
similar
to
that
in
the
AC
SLOW
position,
and
you
will
notice
no
difference
when
displaying
the
cali rator
waveform.
The
only
difference
is
that
an
rc
filter
is
inserted
in
the
circuit,
making
it
insensitive
to
low
frequencies,
and
allowing
it
to
recover
quickly
from
de
level
changes.
This
is
the
position
to
use
when
there
is
low-frequency
hum
present
or
when
you
are
using
the
alternate
sweep
feature
of
the
Type
CA
Dual-Trace
unit,
and
you
are
looking
at
high-frequency
signals.
General
Triggering
Instructions
The
triggering
system
is
very
flexi le
and
sta le.
Once
you
get
the
feel
of
the
instrument
you
will
find
it
will
trigger
successfully
on
the
most
difficult
triggering
waveforms.
It
will
pro a ly
help
if
you
go
through
the
four
procedures
again
a
time
or
two.
If
you
are
already
familiar
with
the
Tektronix
Type
315
Oscilloscope
triggering
system,
you
will
know
how
to
operate
the
controls
of
the
Type
532.
If
you
have
not
had
experience
with'
this
kind
of
triggering
system,
however,
you
will
pro a ly
need
some
explanation,
partic

ularly
if
you
have
een
using
Tektronix
Type
511,
512,
513
or
524
Oscilloscopes.
In
the
new
triggering
circuits
,
the
TRIGGER

ING
LEVEL
control
determines
at
what
point
on
the
instantaneous
triggering
voltage
trigger

ing
will
occur.
This
control
is
therefore
not
a
sensitivity
control.
For
small
trigger
signals
and
with
ac
coupling,
the
TRIGGERING
LEVEL
control
will
need
to
e
set
near
zero.
Settings
elow
zero
will
cause
triggering
at
a
time
when
the
triggering
voltage
is
negative,
with
respect
to
its
average
level.
Positive
set

tings
will
cause
triggering
only
at
a
time
when
the
triggering
voltage
is
positive.
The
red
STABILITY
control
kno
controls
the
ias
on
the
sweep
multivi rator.
It
there

fore
performs
a out
the
same
function
as
the
sta ility
controls
in
other
Tektronix
oscillo

scopes.
For
recurrent
operation,
advance
the
control
clockwise
until
a
recurrent
trace
appears.
For
triggered
operation,
retard
the
control
from
this
position
counterclockwise
ten
or
fifteen
degrees.
For
most
triggering
signals,
the
PRESET
position
will
provide
a
sta le
display
without
the
need
for
adjusting
the
STABILITY
control
(S/N
5666
-up).
For
triggered
operation,
you
will
also
need
to
adjust
other
trigger
controls
to
select
the
source
of
trigger
signals,
and
the
level,
speed,
and
direction
of
slope
of
the
triggering
waveform.
The
TRIGGER
SLOPE
switch
selects
the
source
of
trigger
signals
and
determines
whether
triggering
will
occur
on
the
positive-going
or
the
negative-going
portions
of
the
triggering
waveform.
Simplifie
Trigger
Circuit
Diagrams
The
simplified
diagrams
of
the
triggering
circuits
showing
the
method
of
trigger-slope
inversion
and
the
circuit
changes
performed
y
the
TRIGGERING
MODE
switch
may
help
you
to
understand
the
use
of
the
functions
availa le
in
the
Type
532
Oscilloscope.
The
following
descri es
the
circuit
operations
in
terms
of
the
simplified
diagrams:
The
trigger
inverter
stage
is
a
cathode
coupled
amplifier.
The
slope
polarity
of
the
output
pulse
must
e
negative
to
suit
the
rest
of
the
circuits
that
follow,
so
the
trigger
signal
is
connected
to
the
amplifier
so
as
to
produce
inverted
output
for
positive
signals,
or
in-phase
output
for
negative
signals.
The
TRIGGER
SLOPE
switch
determines
whether
inverted
or
in-phase
output
results,
y
con

necting
either
one
grid
or
the
other
to
the
trigger
source.
The
trigger-shaper
circuit
makes
a
sharp
pulse
out
of
the
trigger
signal,
and
determines
at
what
voltage
level
on
the
trigger
signal
the
sharp
trigger
pulse
will
e
generated.
The
trigger
shaper,
shown
on'
the
right,
is
a
two-stage
amplifier
circuit,
with
two
tu es
coupled
together
through
a
common
cathode
resistor.
The
iases
of
the
two
tu es
are
set
so
that
the
input
tu e
is
conducting
while
the
output
tu e
is
not
when
no
triggering
signal
is
preset.
When
the
triggering
signal
pulls
the
input
grid
downward
far
enough
it
passes
the
level
of
the
grid
of
the
output
section.
Then
the
output
section
conducts
and
the
input
section
cuts
off,
as
the
grid
goes
on
elow
the
cathode.
¾
■■
1
The
de
level
of
the
cathode
is
esta lished
y
the
de
input
grid
voltage
when
no
triggering
signal
is
preset.
The
input
grid
voltage
is
determined
y
the
setting
of
the
TRIGGERING
LEVEL
control,
which
sets
the
plate
voltage
2-2
Operating
Instructions
-
Type
532
AA
AA
Operating
Instructions
-
Type
532
2-3
of
the
trigger
inverting
stage
and
there y
sets
the
grid
voltage
of
the
trigger
shaping
stage.
The
trigger
input
signal
to
the
shaper
stage
thus
consists
of
the
de
level
which
can
e
adjusted,
plus
the
amplified
signal
from
the
inverter
stage.
By
adjusting
the
TRIGGERING
LEVEL
control
,
you
can
therefore
choose
what
part
of
trigger
signal
will
operate
the
shaping
stage
and
produce
a
pulse
at
its
output
plate.
Additional
functions
of
the
TRIGGERING
MODE
switch
rearrange
the
circuits
to
accom

modate
dc-coupled
triggering,
and
slow
or
fast
ac-coupled
triggering.
The
trigger
shaper
is
a
type
of
multivi rator
in
which
regeneration
causes
fast
transition
etween
two
sta le
states,
regardless
of
how
slowly
the
triggering
signal
passes
the
triggering
level.
For
de
coupling,
the
trigger-inverter
grid
is
de
coupled
to
the
input
signal.
For
ac
coupling,
the
trigger-inverter
grid
is
coupled
through
a
capacitor.
For
SLOW
AC,
the
time
constant
of
the
coupling
circuit
is
relatively
long,
a out
a
millisecond.
For
FAST
AC,
the
coupling
time
constant
is
much
shorter,
a out
10
microseconds,
so
that
the
circuit
will
not
respond
to
slowly
changing
components
in
the
triggering
waveform.
For
example,
the
AC
FAST
circuit
will
reject
60-cycle
hum
com

ponents,
and
trigger
successfully
on
a
desired
higher
frequency
when
oth
are
present
in
the
triggering
waveform.
For
the
dc-triggering
position,
the
input
grid
of
the
inverter
stage
assumes
the
actual
potential
of
the
input
signal,
including
oth
the
de
component
and
the
ac
component.
The
TRIGGERING
LEVEL
control
will
therefore
need
to
e
set
to
include
the
de
level
of
the
trigger
signal.
When
the
TRIGGERING
MODE
switch
is
in
the
AUTOMATIC
position
(AC
AUTO
position
S/N
101-5419),
the
input
grid
of
the
inverter
stage
is
separated
from
the
de
level
of
the
trigger
signal,
and
the
input
grid
of
the
trigger
shaper
stage
is
separated
from
the
de
level
of
the
inverter
plate
y
capacitors.
There
is
thus
no
de
coupling
etween
the
trigger
input
and
the
shaper.
The
trigger-shaper
stage
has
a
large
(3
-megohm)
resistor
connected
etween
plate
and
grid
in
this
switch
position,
so
that
the
stage
oscillates
at
a out
50
cycles
per
second,
depending
on
the
time
constant
of
the
coupling
capacitor
into
the
input
grid
and
the
3
-megohm
resistor.
The
input
grid
rises
and
falls
a out
five
volts
in
roughly
a
sawtooth
waveform
at
the
fifty-cycle
rate.
Each
time
the
grid
reverts
from
the
negative-going
direction
to
the
positive
-
going
direction,
the
output
plate
triggers
the
sweep
on
the
scope,
so
that
at
least
a
zero-
line
trace
is
present
whether
an
external
source
of
trigger
signal
is
present
or
not.
At
any
time
during
the
negative-going
excur

sion
of
the
sawtooth,
a
superimposed
negative
trigger
signal
can
drive
the
input
grid
of
the
shaper
tu e
to
cut-off
and
start
a
triggered
sweep
at
that
instant.
Recurrent
pulses
etween
sixty
cycles
and
2
me
will
synchronize
the
sweep
in
the
AUTOMATIC
position
(AC
AUTO
position
S/N
101-5419).
This
triggering
mode
is
useful
ecause
it
will
maintain
a
sweep,
so
that
any
signal
appearing
in
the
vertical
amplifier
can
e
displayed
whether
it
triggers
the
sweep
or
not,
and
ecause
it
will
provide
a
synchronized
sweep
over
a
wide
range
of
trigger
repetition
rates
with
no
need
for
readjustment
of
the
controls
.
Triggering
Controls
Sta
b
i
I
ity
This
control
sets
the
sweep
multivi rator
ias
one
side
or
the
other
in
the
region
of
recurrent
operation.
As
you
advance
the
con

trol
from
the
counterclockwise
position,
you
will
pass
a
setting
at
which
a
trace
will
appear
in
the
a sence
of
any
triggering
wave

form.
Usually
you
will
want
to
trigger
the
sweep,
and
for
triggered
sweeps
you
should
ack
the
STABILITY
control
counterclockwise
from
this
point
five
or
ten
degrees.
Or
turn
the
control
to
the
PRESET
position
(S/N
5666-
up).
If
you
want
to
stop
the
sweep
from
eing
triggered
at
all,
you
can
turn
this
control
counterclockwise
to
the
stop.
Triggering
Level
This
control
selects
the
point
on
the
trigger

ing
waveform
at
which
triggering
will
occur.
Turning
the
TRIGGERING
LEVEL
control
clock

wise
toward
the
+
sign
causes
the
sweep
to
e
triggered
during
positive
amplitudes
of
the
triggering
waveform.
Turning
the
TRIGGER

ING
LEVEL
control
in
the
-
direction
causes
the
sweep
to
e
triggered
during
negative
amplitudes.
Trigger
Slope
This
control
selects
the
source
of
triggering
signals,
and
determines
whether
the
sweep
is
triggered
during
positive-going
or
negative

going
portions
of
the
triggering
waveform.
Used
in
conjunction
with
the
TRIGGERING
LEVEL
control
the
polarity
functions
of
this
switch
permit
you
to
select
any
part
of
a
triggering
waveform
for
triggering
the
sweep.
How
far
you
must
turn
the
LEVEL
control
to
trigger
at
the
peak
of
a
triggering
wave

form
depends
on
the
amplitude
of
the
signal.
For
small
signals,
the
LEVEL
control
setting
will
always
need
to
e
near
zero,
or
near
the
de
level
if
there
is
a
de
component.
Increas

ing
the
amplitude
of
the
trigger
waveform
while
the
LEVEL
control
remains
constant
will
cause
the
triggering
point
to
phase
along
the
triggering
waveform.
Triggering
Mode
This
switch
arranges
the
circuits
for
single

sweep
triggering
on
three
kinds
of
triggering
waveforms,
and
for
recurrent
sweeps
which
can
e
synchronized.
The
AC
SLOW
position
is
suita le
for
signals
with
a
risetime
of
around
a
microsecond
or
slower.
The
DC
position
is
the
same
except
that
it
includes
the
de
component
of
the
triggering
waveform.
The
AC
FAST
position
is
suita le
for
rise

times
faster
than
10
microseconds,
although
there
is
considera le
overlap
etween
the
capa

ilities
of
the
circuits
in
the
SLOW
and
FAST
switch
positions.
The
AUTOMATIC
position
(AC
AUTO
position
S/N
101-5419)
makes
a
recurrent
trigger
signal
at
a out
a
50
-cycle
rate.
However,
it
will
synchronize
easily
with
recurrent
trigger
sig

nals
from
60
cycles
to
2
megacycles.
It
is
a
useful
function
for
displaying
signals
differ

ing
widely
in
amplitude
and
triggering
speed,
for
example,
in
signal-tracing
techniques,
and
also
for
maintaining
a
ase
line
to
show
that
the
oscilloscope
is
functioning
when
there
is
no
signal.
(In
this
mode,
the
STABILITY
con

trol
is
not
used.
Instead,
an
internal
control
is
connected
into
the
circuit
that
has
een
preset
for
optimum
triggering
over
a
wide
range
of
triggering
signals.
S/N
5666
-up).
(The
STABILITY
control
should
e
set
the
same
for
this
function
as
for
other
triggered
operation,
a out
five
or
ten
degrees
counter

clockwise
from
the
point
where
the
multi

vi rator
runs
recurrently.
At
the
fastest
sweep
speeds
the
ase
line
will
e
just
discerni le
when
there
is
no
signal
ecause
of
the
low
duty
cycle.
S/N
101-5665).
Sweep
Operation
Time/CM
and
Multiplier
The
TIME/CM
and
MULTIPLIER
controls
determine
the
speed
of
the
horizontal
trace.
The
time
per
centimeter
of
horizontal
deflection
is
equal
to
the
produce
of
the
MULTIPLIER
setting
and
the
TIME/CM
setting.
Times
per
centimeter
from
1
microsecond
to
1
second
in
steps
of
10
can
e
selected,
with
the
TIME/
CM
switch,
and
accurate,
fixed
multipliers
of
1,
2,
and
5
times
can
e
selected
with
the
MULTIPLIER
switch.
The
sweep
times
so
selected
can
e
depended
on
within
3
per
cent
of
their
indicated
value.
Mag
nl
ier
The
MAGNIFIER
control
inserts
or
removes
a
feed ack
network
in
the
sweep
amplifier
that
changes
the
gain
five
times.
The
linearity
of
the
amplifier
is
somewhat
etter
when
the
feed ack
circuit
is
included.
The
center
one
fifth
of
the
trace
is
extended
to
fill
the
graticule
when
the
magnifier
is
switched
on.
When
the
sweep
magnifier
is
on,
the
fastest
sweep
speed
is
increased
to
.2
microseconds
per
centimeter.
The
intensity
of
the
trace
is
reduced
when
the
magnifier
is
on
ecause
of
the
reduced
duty
cycle.
External
Sweep
In
the
X10
and
XI
positions
of
the
HORI

ZONTAL
DISPLAY
switch,
the
EXTERNAL
SWEEP
IN
inding
post
is
connected
to
the
horizontal
amplifier.
In
oth
of
these
positions
the
5X
MAGNIFIER
must
e
switched
to
ON
to
keep
the
input
amplifier
within
its
linear
range.
The
EXTERNAL
SWEEP
ATTENUATOR
10-1
can
e
used
in
conjunction
with
the
step
attenuator
to
give
a
100-1
attenuation
range.
2-4
Operating
Instructions
-
Type
532
AA
AA
Operating
Instructions
-
Type
532
2-5
+
3OOV
Auxiliary
Functions
Square
Wave
Calibrator
Accuracy
of
the
open-circuit
voltage
of
the
cali rator
is
within
3
per
cent
of
the
indicated
voltage.
However,
since
the
output
impedance
at
the
CAL.
OUT
terminal
varies
with
the
setting
of
the
voltage-selector
switch,
you
must
e
careful
that
the
load
impedance
you
connect
it
to
does
not
change
the
output
voltage.
The
output
impedance
reaches
a
maximum
of
a out
5,000
ohms
at
the
50
-volt
tap.
The
frequency
of
the
cali rator
multivi rator
is
nominally
1,000
cycles,
ut
may
vary
30
per
cent
either
way.
Vertical
Signal
Out
The
signal
applied
to
the
vertical
amplifier
is
availa le
at
the
front-panel
VERT.
SIGN.
OUT
inding
post.
A
signal
which
will
cause
one
centimeter
of
deflection
will
produce
a
signal
of
a out
.9
volts,
peak-to-peak,
at
the
inding
post.
The
pass and
is
dependent
on
the
external
load.
With
a
capacitive
load
of
50
µµf,
it
extends
from
de
to
2.5
megacycles
at
the
3
d
point.
Trace-Bri
g
htness
Modulation
To
couple
markers
or
the
signals
into
the
ert
cathode
for
rightness
information,
dis

connect
the
ground
strap
at
the
rear
of
the
instrument
and
connect
the
signal
to
the
CRT
CATHODE
inding
post.
The
input
impedance
is
a out
15,000
ohms.
The
circuit
is
ac
coupled
through
a
high-voltage
capacitor
with
an
rc
time
constant
of
a out
15
milliseconds.
Direct
Connection
to
De lection
Plates
(SN
5666
up)
A
plastic
plate
and
mounting
racket
is
availa le
from
the
factory
for
making
direct
connections
to
the
ert
vertical-deflection
plates.
The
mounting
racket
is
designed
to
clamp
around
the
neck
of
the
ert
shield,
adjacent
to
the
deflection-plate
connections.
When
mounted
correctly,
the
plate
will
e
accessi le
through
the
ert
deflection-plate
access
hole
in
the
left
side-panel.
The
racket
and
plate
may
e
ordered
with
or
without
the
necessary
parts
for
vertical-positioning
voltages.
Specify
part
num er
013-008
for
the
unwired
unit,
or
part
num er
013-007
for
the
wired
unit.
Holes
can
e
drilled
in
the
plastic
plate
for
mounting
coaxial
or
other
connectors.
The
two
pins
on
the
left-hand
side
of
the
ert
neck
are
the
vertical-deflection
plates.
S/N
101-5665
the
plastic
cover
on
the
side
of
the
case
allows
low
capacitance
direction
connection
to
the
deflection
plates.
Wire
guides
in
the
center
hold
the
leads
away
from
the
case.
The
two
pins
on
the
side
of
the
ert
are
the
vertical
deflection
plates
and
the
two
on
the
top
are
the
horizontal
deflection
plates.
To
avoid
distortion,
the
average
de
potential
on
the
vertical-deflection
plates
should
e
etween
150
and
250
volts.
If
you
use
a
different
voltage,
the
distortion
can
e
minimized
y
adjusting
the
GEOM.
ADJ.
control
at
the
rear
of
the
sweep
chassis.
(Unless
de
coupling
is
required,
connect
coupling
capacitors
in
series
with
the
leads
to
the
deflection
plates
and
connect
one-megohm
resistors
from
the
deflection
plates
to
the
leads
from
the
vertical
amplifier.
With
this
connection
the
plates
are
maintained
at
the
proper
operating
potential,
and
positioning
con

trol
is
retained
for
the
front-panel
VERTICAL
POSITION
control.)
S/N
5420-up.
Block
Diagram
The
Block
Diagram
shows
interconnections
of
the
functional
parts
of
the
oscilloscope,
except
the
power
supplies.
Functions
of
the
switches
are
shown
instead
of
their
actual
connections.
Vertical
Amplifier
Plug-In
Preampli iers
In
the
upper
left
of
the
Block
Diagram
is
shown
the
vertical-deflection
system.
The
lock
la eled
"plug-ins"
represents
one
of
the
several
plug-in
preamplifiers
availa le.
Units
are
availa le
with
a
wide
pass
and,
with
reduced
pass
and
and
higher
sensitivity
,
with
differential
input,
with
channel
switching
for
alternate
trace
presentation,
etc.
These
units
have
cali

rated
gain
controls
and
vertical
position
con

trols.
Connections
for
power
in
and
signal
out
are
made
through
a
multiple-contact
mating
plug
and
socket.
Output
from
these
units
is
push-pull
at
low
impedance.
Main
Unit
The
main
unit
contains
all
the
power
supplies,
the
sweep
system,
the
high-level
portions
of
the
vertical
amplifier
and
its
associated
circuits
,
the
cali rator,
and
the
cathode-ray
tu e.
The
driver
stage
feeds
the
vertical-deflection
signal
to
the
trigger-pickoff
circuits
that
supply
an
internally
derived
trigger
signal
to
trip
the
sweep
circuits
with
thé
o served
signal.
Trigger
Picko /
The
pickoff
circuit
supplies
a
sample
of
the
vertical-deflection
signal
to
the
TRIGGER
SLOPE
switch
for
triggering
purposes.
SECTION
3
CIRCUIT
DESCRIPTION
Vertical
Output
Ampli ier
This
amplifier
raises
the
signal
to
the
level
needed
for
the
vertical-deflection
plates
at
low
impedance.
Calibrato
r
The
cali rator
has
no
internal
connection
to
the
vertical-amplifier
system.
It
consists
of
a
symmetrical
multivi rator
with
a
cathode
-
follower
output
tu e
whose
cathode
resistor
is
a
cali rated
voltage
divider.
Sweep
Trigger
Mode
and
Trigger
Slope
Selectors
At
the
left
of
the
diagram
are
shown
the
functions
of
the
switches
that
select
the
source
and
slope
of
trigger
signals
and
arrange
the
circuits
to
accommodate
the
trigger
character

istics.
Trigger
Phase
Inverter
This
stage
provides
either
in-phase
or
inverted
output
so
as
to
provide
negative

going
output
for
either
negative-going
or
posi

tive-going
input
trigger
signals.
Trigger
Sha
per
The
trigger
-shaper
amplifier
makes
a
sharp
pulse
from
the
trigger
signal
at
a
time
during
the
sloping
part
of
the
trigger
signal
determined
y
the
setting
of
the
triggering-level
control.
A
sharpened
negative-going
pulse
triggers
the
multivi rator.
M
ultivibrator
The
multivi rator
turns
on
the
sweep
gen

erator
and
generates
the
ert-tu e
un lanking
pulse
when
it
is
switched
from
its
quiescent
2-6
Operating
Instructions
-
Type
532
AA
AA
Circuit
Description
-
Type
532
3-1
state.
The
sharp
negative-going
trigger
signal
from
the
trigger-shaper
circuit
trips
the
multi

vi rator,
which
thereafter
stays
in
the
second
state
until
the
sweep
generator
reverts
it
to
its
quiescent
state.
Sweep
Generator
The
sweep
generator
is
a
Miller
integrator
that
produces
a
positive-going
sawtooth
a out
150
volts
peak-to-peak.
The
sweep
generator
turns
itself
off
when
it
reaches
a
prescri ed
level
determined
y
the
sweep-length
control,
y
transmitting
a
signal
through
the
trigger-
holdoff
circuits
to
the
multivi rator.
Trigger
Holdo
The
trigger-holdoff
circuit
transmits
the
sweep
turn-off
signal
to
the
multivi rator
ut
riefly
holds
off
su sequent
trigger
signals
from
starting
the
sweep
again
until
all
parts
of
the
circuit
have
reached
their
quiescent
states.
Swee
p
Amp
li ier
The
sweep
amplifier
converts
the
sawtooth
output
of
the
sweep
generator
into
push-pull
output
at
low
impedance
at
the
level
required
to
sweep
the
eam
across
the
crt-tu e
screen.
The
amplifier
gain
can
e
increased
y
a
factor
of
five
for
sweep
magnification.
The
horizontal-positioning
control
operates
on
this
stage.
Unblanking
The
multivi rator
generates
the
positive

going
un lanking
pulse
at
the
same
time
it
turns
on
the
sweep
generator.
The
positive
pulse
is
transmitted
y
means
of
two
cathode
followers
through
a
floating
high-voltage
nega

tive
supply
to
the
control
grid
of
the
crt
tu e.
Delayed-Gate
Circuit
The
delayed-gate
circuit
is
a
ista le
multi

vi rator
which
changes
state
when
its
input
grid
is
raised
a ove
the
triggering
point
y
the
sawtooth
wave
of
the
sweep
generator..
An
adjusta le
ias
added
to
the
sawtooth
can
move
the
triggering
point
to
any
position
along
the
sawtooth.
A
positive
pulse
generated
y
the
multivi rator
is
transmitted
to
a
front
-
panel
connector
y
means
of
a
cathode-folio
wer.
The
positive
pulse
is
terminated
when
the
sawtooth
returns
negative.
External-Sweep
Ampli ier
The
external-sweep
amplifier
provides
a
means
of
using
external
sweep
voltage.
It
includes
a
fixed
attenuator
and
an
adjusta le
attenuation
control.
Choice
of
internal
or
external
sweep
can
e
made
y
means
of
the
HORIZONTAL
DISPLAY
switch.
The
sweep
magnifier
must
e
used
with
external
sweeps.
Power
Supply
Plate
and
Heater
Power
The
60-cycle
117-234-volt
transformer
has
four
separate
high-voltage
windings.
AC
output
from
each
winding
is
rectified
y
means
of
full

wave
rectifiers.
Rectified
de
output
is
filtered
with
capacitors
and
regulated
y
means
of
series
regulator
tu es.
Three
positive
voltages
of
350,
225
and
100
volts
are
referred
to
-150
volts
for
their
regulation.
The
negative
150
-volt
supply
is
referred
to
a
60
-volt
glow
tu e
for
its
regulation.
Catho e-Ray
Tube
High-Voltage
A
60-kc
vacuum-tu e
oscillator
has
the
primary
of
a
step-up
transformer
for
its
oscillator
inductance.
A
sample
of
the
rectified
secondary
voltage
is
compared
to
a
sta le
de
source,
and
the
difference
is
kept
constant
y
an
electronic
circuit
that
adjusts
the
oscillator
amplitude
of
oscillation
in
the
direction
to
reduce
any
change.
Three
vacuum
diodes
rectify
stepped-up
vol

tages
at
three
secondary
windings.
Two
recti

fiers
supply
positive
and
negative
accelerating
potentials
to
the
crt
tu e.
The
third
supplies
a
nearly
equal
negative
potential
to
the
control
grid
of
the
crt
tu e.
This
supply
floats
on
top
of
the
un lanking
pulse,
which
is
connected
in
series
with
it
to
ground
at
its
positive
end.
Color
Coding
We
use
color
coded
wires
in
this
instrument
to
help
you
identify
the
various
circuits.
The
ac
power
leads
are
yellow
and
coded
1-1-0
( rown- rown- rown)
following
the
RETMA
resistor
color
code.
The
+350-volt
us
is
white
and
coded
3-5-0
(orange-green- rown
eginning
with
the
widest
stripe).
The
-150-
volt
us
is
lack
and
coded
1-5-0.
The
heater
leads
are
coded
6-1,
6-2,
etc.,
not
to
indicate
that
the
voltages
are
different
ut
to
differentiate
etween
the
leads.
All
signal
leads
have
a
single
stripe.
A
few
wire
colors
are
indicated
y
small,
lower
case
letters
on
the
diagrams.
Air
Filter
The
Type
532
Oscilloscope
is
cooled
y
filtered
forced
air.
If
the
filter
gets
too
dirty
it
will
restrict
the
flow
of
cooling
air
and
may
cause
the
instrument
to
overheat.
The
filter
should
e
inspected
every
three
or
four
months
and
cleaned
or
replaced
if
necessary.
Two
types
of
air
filters
can
e
used
with
your
Tektronix
equipment.
A
washa le
air
filter
constructed
of
aluminum
wool
coated
with
an
adhesive
is
usually
supplied
with
your
instrument.
A
disposa le
glass-wool
is
availa le
through
your
local
Tektronix
field
office
or
direct
from
the
factory.
If
you
are
replacing
an
aluminum-type
filter
with
the
disposa le
glass-wool
type,
it
is
est
to
order
No.
378-009,
which
includes
two
ack-up
screens
that
help
to
prevent
damage
to
the
filter.
For
future
replacements
of
the
glass-wool
filter
only,
order
No.
378-012.
To
clean
the
aluminum
filter,
run
hot
water
through
it
from
the
side
that
was
inside.
Or
slosh
it
around
in
hot
soapy
water
and
rinse
it
in
clean
water.
Then
dry
it
thoroughly
and
coat
it
with
”
Filter
Coat
”
,
a
product
of
the
Research
Products
Corporation.
Pint
SECTION
4
MAINTENANCE
cans
are
availa le
under
the
name
"
Handi-
Koter"
from
some
air-conditioner
suppliers.
Other
adhesive
materials
are
no
dou t
satis

factory.
Fan
Motor
The
fan
motor
earings
will
require
oiling
every
few
months
or
every
thousand
hours
of
operation.
Use
a
good
grade
of
light
machine
oil,
and
apply
only
a
drop
or
two.
Soldering
and
Ceramic
Strips
Many
of
the
components
in
your
Tektronix
instrument
are
mounted
on
ceramic
terminal
strips.
The
notches
in
these
strips
are
lined
with
a
silver
alloy.
Repeated
use
of
excessive
heat,
or
use
of
ordinary
tin-lead
solder
will
reak
down
the
silver-to-ceramic
ond.
Occa

sional
use
of
tin-lead
solder
will
not
reak
the
ond
if
excessive
heat
is
not
applied.
If
you
are
responsi le
for
the
maintenance
of
a
large
num er
of
Tektronix
instruments,
or
if
you
contemplate
frequent
parts
changes,
we
recommend
that
you
keep
on
hand
a
stock
of
solder
containing
a out
3%
silver.
This
type
of
solder
is
used
frequently
in
printed
circuitry
and
should
e
readily
availa le
from
radio-supply
houses.
If
you
prefer,
you
can
order
the
solder
directly
from
Tektronix
in
one-pound
rolls.
Order
y
Tektronix
part
num

er
251-514.
Because
of
the
shape
of
the
terminals
on
the
ceramic
strips
it
is
advisa le
to
use
a
wedge-shaped
tip
on
your
soldering
iron
when
you
are
installing
or
removing
parts
from
the
strips.
Fig.
4-1
will
show
you
the
correct
shape
for
the
tip
of
the
soldering
iron.
Be
sure
and
file
smooth
all
surfaces
of
the
iron
which
will
e
tinned.
This
prevents
solder
from
uilding
up
on
rough
spots
where
it
will
quickly
oxidize.
3-2
Circuit
Description
-
Type
532
AA AA
Maintenance
-
Type
532
4-1
When
removing
or
replacing
components
mounted
on
the
ceramic
strips
you
will
find
that
satisfactory
results
are
o tained
if
you
proceed
in
the
manner
outlined
elow.
1.
Use
a
soldering
iron
of
a out
75-
watt
rating.
Fig.
4-1.
Soldering
iron
tip
correctly
shaped
and
tinned
2.
Prepare
the
tip
of
the
iron
as
shown
in
Fig.
4-1.
3.
Tin
only
the
first
1/16
to
1/8
inch
of
the
tip.
For
soldering
to
ceramic
terminal
strips
tin
the
iron
with
solder
containing
a out
3%
silver.
4.
Apply
one
corner
of
the
tip
to
the
notch
where
you
wish
to
solder
(see
Fig.
4-2).
Fig.
4-2.
Method
of
applying
heat
to
ceramic
strip.
5.
Apply
only
enough
heat
.
to
make
the
solder
flow
freely.
6.
Do
not
attempt
to
fill
the
notch
on
the
strip
with
solder;
instead,
apply
only
enough
solder
to
cover
the
wires
adequately,
and
to
form
a
slight
fillet
on
the
wire
as
shown
in
Fig.
4-3.
In
soldering
to
metal
terminals
(for
example
,
pins
on
a
tu e
socket)
a
slightly
different
technique
should
e
employed.
Prepare
the
iron
as
outlined
a ove
,
ut
tin
with
ordinary
tin-lead
solder.
Apply
the
iron
to
the
part
to
e
soldered
as
shown
in
Fig.
4-4.
Use
only
enough
heat
to
allow
the
solder
to
flow
freely
along
the
wire
so
that
a
slight
fillet
will
e
formed
as
shown
in
Fig.
4-3.
Dial
Fig.
4-3.
Note
the
slight
fillet
formed
on
a
correctly
soldered
joint.
General
Sol ering
Consi erations
When
replacing
wires
in
terminal
slots
clip
the
ends
neatly
as
close
to
the
solder
joint
as
possi le.
In
clipping
the
ends
of
wires
take
care
the
end
removed
does
not
fly
across
the
room
as
it
is
clipped.
Fig.
4-4.
Soldering
to
a
metal
pin.
Occasionally
you
will
wish
to
hold
a
are
wire
in
place
as
it
is
eing
soldered.
A
handy
device
for
this
purpose
is
a
short
length
of
wooden
dowel,
with
one
end
shaped
as
shown
in
Fig.
4-5.
In
soldering
to
terminals
pins
mounted
in
plastic
rods
it
is
necessary
to
use
some
form
of
"
heat
sink"
to
avoid
melting
the
plastic.
A
pair
of
long-nosed
pliers
(see
Fig.
4-6)
makes
a
convenient
tool
for
this
Fig.
4-5.
A
wooden
dowel
shaped
for
use
as
a
soldering
aid.
Ceramic
Strips
Two
distinct
types
of
ceramic
strips
have
een
used
in
Tektronix
instruments.
The
earlier
type
mounted
on
the
chassis
y
means
of
#4-40
olts
and
nuts.
The
later
is
mounted
with
snap-in,
plastic
fittings.
Both
styles
are
shown
in
Fig.
4-7.
To
replace
ceramic
strips
which
olt
to
the
chassis,
screw
a
#4-40
nut
onto
each
mounting
olt,
positioning
the
olt
so
that
the
distance
etween
the
ottom
of
the
olt
and
the
ottom
of
the
ceramic
strip
equals
the
height
at
which
you
wish
to
mount
the
strip
a ove
the
chassis.
Secure
the
nuts
to
the
olts
with
a
drop
of
red
glyptal.
Insert
the
olts
through
the
holes
in
the
chassis
where
the
original
strip
was
mounted,
placing
a
#4-40
lockwasher
etween
each
nut
and
the
chassis.
Place
a
second
set
of
#4-40
lock

washers
on
the
protruding
ends
of
the
olts,
Fig.
4-6.
Long-nosed
pliers
used
as
a
heat
sink.
and
fasten
them
firmly
with
another
set
of
#4-40
nuts.
Place
a
drop
of
red
glyptal
over
each
of
the
second
set
of
nuts
after
fastening.
Mounting
Later
Ceramic
Strips
To
replace
strips
which
mount
with
snap-
in
plastic
fittings,
first
remove
the
original
fittings
from
the
chassis.
Assem le
the
mount
ing
post
on
the
ceramic
strip.
Insert
the
nylon
collar
into
the
mounting
holes
in
the
chassis.
Carefully
force
the
mounting
post
into
the
nylon
collars.
Snip
off
the
portion
of
the
mounting
post
which
protrudes
elow
the
nylon
collar
on
the
reverse
side
of
the
chassis.
NOTE
Considera le
force
may
e
nec

essary
to
push
the
mounting
rods
into
the
nylon
collars.
Be
sure
that
you
apply
this
force
to
the
upper
ends
of
the
mounting
rods
rather
than
to
the
ceramic
strip.
Fig.
4-7.
Old
and
new
styles
of
ceramic
strips.
The
newer
ceramic
strips
mount
in
nylon
collars.
Trouble
Shooting
If
the
instrument
fails
to
operate
at
all,
including
the
fan
and
the
pilot
light,
check
the
source
of
power
and
determine
that
the
power
cord
plug
is
firmly
in
place.
Then
check
the
5
-amp
fuse
at
the
ack
of
the
instru

ment
near
the
power
receptacle.
If
the
fan
and
pilot
light
operate
ut
there
'is
no
spot
visi le,
there
is
a
possi ility
that
4-2
Maintenance
-
Type
532
AA AA
Maintenance
-
Type
532
4-3