Tektronix 53C User manual
DUAL-TRACE
CALIBRATED
PREAMP
TYPE
53/54C
INSTRUCTION
MANUAL
TEKTRONIX,
INC.
MANUFACTURERS
OF
CATHODE-RAY
AND
VIDEO
TEST
INSTRUMENTS
Sunset
Highway
and
Barnes
Road
•
P.
O.
Box
831
•
Portland
7,
Oregon,
U.
S.
A.
Phone:
CYpress
2-2611
•
Cables:
Tektronix
GENERAL
DESCRIPTION
GENERAL
The
Type
53/54C
Dual-Trace
Unit
contains
two
identical
amplifier
channels
that
can
be
elec
tronically
switched
either
by
the
oscilloscope
sweep
or
at
a
free-running
rate
of
approximately
100
kc.
When
amplifier
switching
is
triggered
by
the
oscilloscope
sweep,
the
two
signals
to
be
compared
appear
on
alternate
sweeps.
Because
the
sweeps
are
identical,
and
time-delay
charac
teristics
of
the
two
amplifier
channels
are
closely
controlled,
time
comparisons
accurate
within
1
mµsec
can
be
made.
Stationary
display
of
two
signals
unrelated
in
frequency
can
be
accomplished
by
internal
trig
gering
of
the
sweep
alternately
by
the
two
sig
nals.
In
free-running
operation,
switching
oc
curs
at
a
rate
of
approximately
100
kc,
making
it
possible
to
view
two
simultaneous
transients.
Transients
of
as
little
as
one-millisecond
duration
can
be
well
delineated,
with
about
one
hundred
elements
in
each
trace.
For
many
purposes,
shorter
transients
can
be
adequately
observed.
Either
amplifier
channel
can
be
used
separately
without
electronic
switching,
making
the
Type
53/54C
also
useful
in
all
single-trace
applications
within
its
frequency-response
and
sensitivity
capabilities.
Maximum
flexibility
is
obtained
by
providing
separate
positioning,
sensitivity,
and
polarity-inverting
controls
for
each
channel.
TYPE
53/S4C
SPECIFICATIONS
Operating
Modes
The
two
amplifier
channels
can
be
displayed
alternately
at
a
rate
of
approximately
100
kc,
alternately
every
other
sweep,
or
either
channel
can
be
used
separately.
Amplifier
Sensitivity
Basic
deflection
factor
—
.05
v/cm,
ac
or
d
c
.
Nine
calibrated
sensitivities
—
.05
v/cm
to
20
v/cm,
accurate
within
3%
when
set
on
any
one
step.
Amplifier
Transient
Response
With
541
or
545,
rise
time
.015
µsec.
With
531
or
535,
rise
time
.032
µsec.
With
532,
rise
time
.070
µsec.
Amplifier
Frequency
Response
With
541
or
545,
3
db
down
at
approximately
24
me.
With
531
or
535,
3
db
down
at
approximately
11
me.
With
532,
3
db
down
at
approximately
5
me.
Input
Impedance
1
megohm
shunted
by
20
µµi;
with
P410
probe
10
megohms,
7.5
µµf
Physical
Characteristics
Construction
—
Aluminum
alloy
chassis.
Fin
ish
—
Photo-etched
anodized
panel.
Weight
—
4½
lbs.
FUNCTIONS
OF
CONTROLS
AND
CONNECTORS
CHANNEL
A
CHANNEL
B
Signal
input
to
the
A-channel
or
B-channel
amplifier.
DC
—
AC
Slide
switch
to
provide
either
ac
or
de
coupled
input
into
the
amplifiers.
VOLTS/CM
Nine-position
switch
used
to
select
the
calibrated
vertical-deflection
sensitivities.
VARIABLE
Potentiometer
concentric
with
the
VOLTS/CM
switch
to
provide
continuously
variable
attenuation
between
the
calibrated
sensitivities
and
to
extend
the
attenu
ation
to
a
sensitivity
of
50
v/cm.
POLARITY
Two-position
switch
to
provide
optional
in-phase
or
out-of-phase
output.
VERTICAL
POSITION
Potentiometer
to
provide
for
shifting
the
position
of
the
trace
vertically.
GAIN
ADJ.
Screwdriver
adjustable
potentiometer
to
permit
the
gain
of
the
amplifier
to
be
accurately
set.
DC
BAL.
Screwdriver
adjustable
potentiometer
to
provide
for
setting
the
VARIABLE
attenuator
d
c
levels
so
the
trace
does
not
shift
position
when
the
attenuation
is
varied.
MODE
Four-position
switch
to
allow
either
amplifier
to
be
used
independently,
to
provide
for
switching
the
two
amplifiers
at
an
arbitrary
rate,
or
to
synchronize
the
switch
ing
with
the
oscilloscope
’
s
sweep.
53/54C
—
GENERAL,
DESCRIPTION
—
PAGE
1
OPERATING
INSTRUCTIONS
FIRST-TIME
OPERATION
Plug
the
unit
into
a
540-
or
530-Series
Oscil
loscope
and
turn
the
power
on.
Allow
the
instru
ment
to
reach
operating
temperature,
about
2
to
3
minutes
and
free-run
the
sweep
at
1
millisec-
ond/cm.
Turn
the
MODE
switch
to
A
ONLY
and
the
A-channel
POLARITY
and
AC-DC
switches
to
NORMAL
and
DC
respectively.
Position
the
trace
to
about
+2
cm
with
the
A-
channel
VERTICAL
POSITION
control.
Turn
the
MODE
switch
to
B
ONLY
and
the
B-channel
POLARITY
and
AC-DC
switches
to
NORMAL
and
DC
respectively.
Position
the
trace
to
about
—
2
cm
with
the
B-channel
VERTICAL
POSITION
control.
Now
turn
the
MODE
switch
to
CHOPPED.
Two
traces
will
appear
on
the
crt
screen.
Notice
that
the
A-channel
VERTICAL
POSITION
control
moves
the
upper
trace
and
the
B-channel
VERTICAL
POSITION
control
moves
the
lower
trace.
Increase
the
sweep
speed
to
100
microsecond/cm
and
notice
that
each
trace
is
composed
of
many
short-duration
elements.
The
two
channels
are
being
switched
at
approxi
mately
100
kc
so
that
each
channel
conducts
for
about
5
µsec
and
then
is
cut
off
while
the
other
channel
conducts
for
an
equal
time.
Now
turn
the
MODE
switch
to
the
ALTER
NATE
position.
There
are
still
two
traces
on
the
crt
screen
but
the
traces
are
no
longer
chop
ped
into
small
bits.
For
each
sweep
cycle
one
channel
is
conducting
and
the
other
is
cut
off.
The
channels
are
switched
at
the
end
of
each
sweep
cycle.
GENERAL
OPERATION
Either
of
the
two
identical
amplified
channels
can
be
used
independently
by
turning
the
MODE
Switch
to
A
ONLY
or
B
ONLY
and
connecting
the
signal
to
be
observed
to
the
ap
propriate
input.
The
following
remarks
apply
equally
well
to
either
amplifier
channel.
Use
of
Probe
The
Type
P410
probe,
furnished
with
the
540-
Series
Oscilloscopes,
is
designed
to
preserve
the
transient
response
of
this
unit.
This
probe
in
troduces
no
ringing
but
causes
an
additional
fre
quency-response
loss
of
less
than
1
db
at
24
me.
The
Type
P410
probe
has
a
10-to-l
attenuation
ratio.
The
Type
P510A
probe
is
not
suitable
for
use
with
the
Type
53/54C
Plug-In
Unit
and
540-
Series
Oscilloscope
combination
to
observe
fast
rising
pulses.
This
probe
tends
to
ring
at
about
50
me
and
the
wide
passband
of
the
53/54C
—
540-Series
combination
will
display
any
ringing
that
may
occur.
Be
sure
to
check
the
adjustment
of
the
probe
when
you
first
connect
it
to
a
plug-in
unit
or
oscilloscope.
The
probe
compensation
is
a
func
tion
of
the
shunt
input
capacitance
of
the
par
ticular
plug-in
unit
or
oscilloscope
that
you
use
the
probe
with.
If
the
compensation
is
incorrect
the
frequency
response
will
be
affected.
Touch
the
probe
tip
to
the
calibrator
output
connector
and
display
several
cycles
of
the
calibrator
wave
form.
If
the
top
and
bottom
of
the
displayed
square
wave
are
not
flat,
adjust
the
trimmer
ca
pacitor
located
either
inside
the
probe
body
or
inside
the
box
at
the
other
end
of
the
cable
to
achieve
correct
square-wave
response.
Input
Coupling
It
is
sometimes
undesirable
to
display
the
de
level
of
the
waveform
being
observed.
Placing
the
AC-DC
switch
in
the
AC
position
inserts
a
capacitor
in
series
with
the
input
so
the
de
com
ponent
of
the
waveform
is
blocked
and
only
the
ac
component
is
displayed.
The
low-frequency
response
is
about
2
cps
when
ac
coupling
is
used.
Output
Polarity
It
will
be
desirable
to
invert
the
displayed
waveform
at
times,
particularly
when
using
the
dual-trace
feature
of
the
53/54C.
The
POLAR
ITY
switch
has
two
positions.
In
the
NORMAL
position
the
displayed
waveform
will
have
the
same
polarity
as
the
input
signal.
In
the
IN
VERTED
position
the
displayed
waveform
will
be
turned
upside
down;
that
is,
a
positive-going
pulse
will
be
displayed
as
a
negative-going
pulse.
DC
Balance
Adjustment
After
the
plug-in
unit
has
been
in
use
for
a
period
of
time
you
will
notice
that
the
trace
will
change
position
as
the
VARIABLE
control
is
rotated.
This
is
caused
by
tube
ageing
and
the
resultant
shift
in
operating
potentials.
To
cor
rect
this
condition
rotate
the
VARIABLE
con
trol
back
and
forth
and
adjust
the
DC
BAL
con
trol
until
the
trace
position
is
no
longer
affected
by
rotation
of
the
VARIABLE
control.
Gain
Adjustment
Ageing
of
the
tubes
will
also
affect
the
gain
of
the
plug-in
unit.
Display
a
calibrator
wave
form
of
0.2
volt
peak
to
peak
with
the
VOLTS/CM
switch
in
the
.05
position.
Adjust
the
GAIN
ADJ
control
until
the
displayed
waveform
is
4
graticule
divisions
in
amplitude.
Make
sure
the
VARIABLE
control
is
turned
full
right
to
the
CALIBRATED
position
before
making
this
adjustment.
53/54C
—
OPERATING
INSTRUCTIONS
—
PAGE
1
Positioning
Adjustment
The
VERT
POS
RANGE
control
balances
the
de
output
level
so
the
full
range
of
the
front
panel
positioning
controls
can
be
utilized.
This
control
is
accessible
when
the
left
side
panel
is
removed.
Center
the
trace
in
both
the
A
ONLY
and
B
ONLY
positions
of
the
MODE
switch.
Note
the
settings
of
the
VERTICAL
POSI
TION
controls.
Adjust
the
VERT
POS
RANGE
control
so
both
the
A-channel
and
B-channel
VERTICAL
POSITION
controls
are
approxi
mately
centered
when
the
displayed
trace
is
cen
tered.
DUAL-TRACE
OPERATION
Generally,
two
types
of
operation
will
be
per
formed
using
the
dual-trace
function
of
the
53/54C;
the
observation
of
repetitive
waveforms
and
the
observation
of
single
transients.
The
two
types
of
operation
are
fundamentally
differ
ent
so
we
will
examine
them
in
the
order
stated.
Repetitive
Signals
Connect
the
two
signals
to
be
compared
to
the
two
signal
inputs
and
turn
the
MODE
switch
to
A
ONLY.
Set
the
sweep
up
for
trig
gered
operation
and
adjust
the
VOLTS/CM
and
VERTICAL
POSITION
controls
as
neces
sary
to
display
the
waveform.
Turn
the
MODE
switch
to
B
ONLY
and
adjust
the
correspond
ing
controls
as
necessary
to
display
the
other
waveform.
Now
turn
the
MODE
switch
to
ALTERNATE.
If
necessary,
touch
up
the
oscil
loscope
’
s
sweep
triggering
controls
to
obtain
a
stable
image.
Both
waveforms
will
now
be
dis
played
on
the
ert
screen.
As
the
control
of
each
amplifier
is
independent
you
can
position,
atten
uate,
or
invert
the
signals
as
necessary
to
com
pare
their
shape,
relative
amplitudes,
etc.
Use
the
AC
FAST
triggering
mode
and
AL
TERNATE
sweeps
for
INTernal
triggering
on
signals
having
components
above
10
kc.
For
low
er-frequency
signals,
use
the
AC
SLOW
trigger
ing
mode.
In
the
AC
FAST
position,
an
rc
filter
is
inserted
into
the
circuit
allowing
it
to
recover
quickly
from
the
de
level
changes
encountered
with
the
ALTERNATE
sweep.
To
compare
the
phase
difference
between
two
signals,
you
should
trigger
externally
using
the
reference
signal
as
the
trigger
signal.
Single
Transients
When
it
is
necessary
to
observe
a
single
tran-
ient
at
two
parts
of
a
circuit
another
procedure
must
be
followed.
In
the
foregoing
case,
one
of
the
signals
triggers
the
sweep
and
that
amplifier
remains
conducting
for
the
sweep
duration.
At
the
end
of
the
sweep
the
amplifiers
are
switched
and
the
other
signal
then
triggers
the
sweep
and
that
amplifier
remains
conducting
for
the
sweep
duration.
Each
of
the
signals
is
being
displayed
every
other
sweep
cycle.
If
you
at
tempted
to
observe
a
single
transient
in
this
manner
the
transient
will
pass
through
which
ever
amplifier
happens
to
be
conducting
and
will
trigger
the
sweep.
This
will
display
the
trans
ient
as
seen
by
whichever
amplifier
is
conduct
ing
but
when
the
amplifiers
are
switched
at
the
end
of
that
sweep
there
will
be
no
further
signal
to
trigger
another
sweep
until
the
next
transient
occurs.
The
problem
here
is
to
be
able
to
ob
serve
the
transient
using
both
amplifiers
during
a
single
sweep
cycle.
Turn
the
MODE
switch
to
CHOPPED.
Now
the
two
amplifiers
are
being
switched
on
and
off
independently
of
any
signal.
The
switching
rate
is
approximately
100
kc
so
each
amplifier
is
conducting
for
about
5
µsec
and
then
is
cut
off
while
the
other
amplifier
conducts
for
an
equal
length
of
time.
In
this
case
the
sweep
is
being
triggered
by
the
switching
waveform,
particu
larly
if
the
two
traces
are
positioned
very
far
apart,
as
the
switching
waveform
is
equivalent
to
a
100-kc
square
wave.
It
will
usually
be
very
difficult
if
not
impossible
to
trigger
the
sweep
internally
from
the
signal
so
the
sweep
controls
should
be
set
for
external
triggering.
Review
the
OPERATING
INSTRUCTIONS
section
of
the
oscilloscope
’
s
instruction
manual
for
the
proper
procedure
for
external
triggering
of
the
sweep.
Now
the
two
signals
to
be
observed
can
be
connected
to
the
two
inputs
and
both
wave
forms
will
be
displayed
during
one
sweep
cycle.
Transients
as
short
as
1
msec
duration
can
be
well
delineated,
with
about
100
elements
in
each
trace.
As
before,
the
independent
control
of
each
amplifier
will
allow
you
to
position,
attenu
ate,
or
invert
the
waveforms
so
they
can
be
easily
compared.
53/54C
—
OPERATING
INSTRUCTIONS
—
PAGE
2
CIRCUIT
DESCRIPTION
AMPLIFIERS
The
Type
53/54C
Plug-In
Unit
consists
of
two
identical
amplifier
channels
and
a
channel
switching
multivibrator.
The
following
descrip
tion
of
the
amplifiers
applies
equally
well
to
either
channel.
Input
Coupling
and
Attenuation
The
signal
to
be
displayed
is
applied
to
the
input
cathode
follower
V3
0
53
(V4053)
by
way
of
the
AC-DC
switch
and
the
VOLTS/CM
switch.
The
AC-DC
switch
is
a
two-position
slide
switch
that
shorts
out
C3003
(C4003)
in
the
DC
position
so
the
input
is
d
c
coupled.
In
the
AC
position
of
this
switch
the
signal
must
pass
thru
C3003
(C4003)
so
the
d
c
component
of
the
signal
is
blocked.
The
VOLTS/CM
switch
is
a
9-position
rotary
switch
that
selects
the
various
frequency-com
pensated
rc
attenuator
sections.
The
basic
sen
sitivity
of
the
unit
is
.05
volts/cm.
This
sensi
tivity
is
reduced
by
the
eight
individually
se
lected
attenuator
sections
to
give
nine
fixed
cali
brated
sensitivities.
Input
Stage
The
input
stage
consists
of
the
cathode
fol
lower
V3053
(V4053)
and
the
cathode-coupled
phase
inverters
V3083
and
V3263
(V4083
and
V4263).
The
control-grid
d
c
level
of
V3083
(V4083)
is
established
by
the
d
c
connection
to
the
cathode
of
V3053
(V4053).
The
control
grid
dc
level
of
V3263
(V4263)
is
adjustable
by
means
of
the
DC
BAL
control
so
that
the
d
c
level
of
the
cathodes
of
V3083
and
V3263
(V4083
and
V4263)
can
be
made
equal.
Any
d
c
level
difference
between
these
two
cathodes
would
act
as
a
signal
and
cause
the
trace
to
shift
posi
tion
when
the
VARIABLE
control
is
rotated.
The
VARIABLE
gain
control
establishes
the
amount
of
cathode
coupling
and
thus
allows
the
stage
gain
to
be
varied
over
about
a
2½
to
1
range.
The
GAIN
ADJ
control
permits
the
basic
gain
of
the
unit
to
be
accurately
set
to
agree
with
the
front-panel
calibration.
Polarity
and
Positioning
With
the
POLARITY
switch
in
the
NOR
MAL
position
the
displayed
waveform
will
have
the
same
polarity
as
the
input
signal.
Placing
the
POLARITY
switch
in
the
INVERTED
position
reverses
the
signal-grid
connection
of
V3303
and
V3343
(V4303
and
V4343)
and
turns
the
displayed
waveform
upside
down.
Rotation
of
the
VERTICAL
POSITION
control
forces
one
plate
of
the
input
stage
toward
a
higher
potential
and
the
opposite
plate
toward
a
lower
potential.
The
resulting
dc
level
shift
moves
the
trace
vertically.
Amplifier
Stage
and
Output
CF
The
signal
is
further
amplified
by
V3303
and
V3343
or
V4303
and
V4343,
depending
on
which
channel
is
conducting.
V3303
and
V4303
have
a
common
plate
load
and
likewise
V3343
and
V4343.
Since
one
amplifier
is
always
cut
off
while
the
other
is
conducting,
the
shunt
loading
effect
is
negligible.
V3503
is
the
output
cathode
follower
that
pro
vides
a
low-impedance
source
for
driving
the
oscilloscope
’
s
vertical
amplifier.
The
POSI
TIONING
ADJ
control
located
in
the
grid
circuit
of
the
output
cf
permits
the
trace
to
be
centered
vertically
under
no-signal
conditions.
SWITCHING
CIRCUIT
A
Only,
B
Only
V37
0
3
is
a
multivibrator
that
is
controlled
by
the
MODE
switch.
With
the
MODE
switch
in
the
A
ONLY
or
B
ONLY
position
the
multi
vibrator
is
held
in
one
of
its
two
possible
states
by
returning
one
grid
to
a
positive
voltage
and
the
other
grid
to
a
negative
voltage.
For
ex
ample,
in
the
A
ONLY
position
the
grid
of
V3703A
is
held
positive
and
this
half
of
the
multivibrator
conducts
while
the
grid
of
V3703B
is
held
negative
and
this
half
is
cut
off.
While
V3703A
is
conducting
the
cathode
is
above
ground
which
causes
V3903A
to
conduct
and
in
turn
pulls
the
grid
of
V3953B
toward
ground
lowering
the
plate
voltage
of
V4083
and
V4263.
This
reduced
plate
voltage
cuts
off
the
following
stage
(V4303
and
V4343)
and
the
B-channel
amplifier
is
held
in
a
non-conducting
state.
The
converse
is
true
of
the
A-channel
amplifier.
The
grid
of
V3903B
is
near
ground
potential
and
with
reduced
plate
current
the
plate
of
V3903B
and
consequently
the
grid
of
V3953A
are
per
mitted
to
become
more
positive
providing
plate
voltage
for
V3083
and
V3263
and
the
A-channel
amplifier
then
conducts.
Chopped
Turning
the
MODE
switch
to
the
CHOP
PED
position
returns
both
grids
of
the
multivi
brator
to
a
positive
voltage
and
the
multivibra
tor
free
runs
at
a
rate
determined
by
the
time
constant
of
the
grid
circuits.
The
two
ampli
fiers
are
alternately
cut
off
and
allowed
to
con
duct
at
the
free-running
rate
of
the
multivi
brator.
TYPE
5
3/54C
—
CIRCUIT
DESCRIPTION
—
PAGE
1
Alternate
Turning
the
MODE
switch
to
the
ALTER
NATE
position
returns
both
grids
of
the
multi
vibrator
to
a
negative
potential
and
it
is
then
bistable.
At
the
end
of
each
sweep
cycle
a
nega
tive-going
trigger
is
generated
and
is
coupled
to
the
multivibrator
through
the
Trigger
Coup
ling
Diode
V3803.
Each
trigger
causes
the
multi
vibrator
to
“
flip
”
from
one
stable
state
to
the
other.
This
alternately
switches
the
amplifiers
on
and
off
but
now
the
switching
rate
is
deter
mined
by
the
sweep
repetition
rate.
TYPE
53/54C
—
CIRCUIT
DESCRIPTION
—
PAGE
2
MAINTENANCE
PARTS
ORDERING
AND
REPLACEMENT
Instruction
Manual
A
Tektronix
instruction
manual
usually
con*
tains
hand-made
changes
to
diagrams
and
parts
lists,
and
sometimes
text.
These
changes
are
in
general
appropriate
only
to
the
instrument
the
manual
was
prepared
for.
These
hand-made
corrections
show
changes
to
the
instrument
that
have
been
made
after
the
printing
of
the
manual.
There
is
a
serial
number
on
the
frontispiece
and
on
the
warranty
page
of
this
manual.
This
is
the
serial
number
of
your
instrument.
Be
sure
the
manual
number
matches
the
instrument
number
when
you
order
parts.
NOTE
Always
include
the
instrument
type
AND
SERIAL
NUMBER
in
any
cor
respondence
regarding
the
instrument.
Standard
Components
Tektronix
will
supply
replacement
compo
nents
at
current
net
prices.
However,
since
most
of
the
components
are
standard
electronic
and
radio
parts
you
can
probably
obtain
them
locally
faster
than
we
can
ship
them
to
you
from
the
factory
in
Portland,
Oregon.
Be
sure
to
consult
the
instruction
manual
to
see
what
tolerances
are
required.
Selected
Components
We
specially
select
some
of
the
components,
whose
values
must
fall
within
prescribed
limits,
by
sorting
through
our
regular
stocks.
The
components
so
selected
will
have
standard
RETMA
color
coding
showing
the
value
and
tolerance
of
the
stock
they
were
selected
from,
but
they
will
not
in
general
be
replaceable
from
dealer
’
s
stocks.
Checked
Tubes
To
obtain
maximum
reliability
and
perform
ance
we
check
some
of
the
vacuum
tubes
in
our
instruments
for
such
characteristics
as
micro
phonics,
balance,
transconductance,
etc.
We
age
other
tubes
to
stabilize
their
characteristics.
Since
there
are
no
well
defined
standards
of
tube
performance
we
have
established
our
own
arbitrary
standards
and
have
developed
equip
ment
to
do
this
checking.
These
checked
tubes
can
be
purchased
through
our
local
Field
Engi
neering
Offices
or
directly
from
the
factory
in
Portland,
Oregon.
Tektronix
Manufactured
Parts
Tektronix
manufactures
almost
all
of
the
me
chanical
parts
and
some
of
the
components
used
in
the
instrument.
If
you
‘
order
a
mechanical
part
be
sure
to
describe
the
part
completely
to
prevent
any
unnecessary
delay
in
filling
your
order.
When
you
have
any
questions
about
me
chanical
parts
or
Tektronix
manufactured
com
ponents
contact
our
nearest
Field
Engineering
Office
or
write
to
the
Field
Engineering
De
partment
at
the
factory
in
Portland,
Oregon.
GENERAL
INFORMATION
Color
Coding
We
use
color
coded
wires
in
the
instruments
to
help
identify
the
various
circuits.
These
wires
will
be
either
a
solid
color
or
will
be
a
solid
color
(including
black
and
white)
with
one
or
more
colored
stripes.
The
colored
stripes
are
“
read
”
in
the
same
manner
as
the
RETM
A
resistor
color
code.
In
the
case
of
multiple
stripes
the
wide
stripe
is
read
first.
Wires
carrying
positive
regulated-power-sup
ply
voltages
are
white
and
the
stripes
indicate
the
supply
voltage.
For
example,
the
+225-V
supply
bus
will
be
coded
red-red-brown
(2-2-1)
giving
two
significant
figures
and
the
decimal
multiplier.
The
negative-supply
bus
wires
are
black
and
the
stripes
indicate
the
supply
voltage.
For
ex
ample,
our
most
common
negative-supply
volt-
tage
is
—
150v
and
is
carried
by
a
black
wire
coded
brown-green-brown
(1-5-1).
The
mains-voltage
leads
to
the
power
trans
former
are
yellow
and
coded
brown-brown-
brown
(1-1-1).
The
tube
heater
leads
are
white
and
coded
6-1,
6-2,
6-3,
etc.,
not
to
indicate
that
the
voltages
are
different
but
to
differentiate
between
cir
cuits.
In
other
respects
the
color
coding
will
vary
from
instrument
to
instrument.
In
general
all
signal-carrying
leads
are
white
and
coded
with
a
single
colored
stripe.
In
a
few
places
where
the
number
of
leads
exceeded
the
capabilities
of
single-stripe
coding
we
have
used
solid-color
leads.
Soldering
Precaution
The
solder
used
on
the
ceramic
terminals
of
this
instrument
must
contain
a
small
percentage
of
silver.
Repeated
use
of
ordinary
tin-lead
solder
will
dissolve
the
fused
bond
of
silver
that
makes
the
solder
adhere
to
the
porcelain,
especially
if
the
soldering
iron
is
quite
hot.
A
quantity
of
the
silver-bearing
solder
that
we
use
at
the
factory
is
attached
to
each
major
instrument
having
ceramic
strips.
This
solder,
containing
approximately
3%
silver,
is
not
readi
ly
available
through
regular
channels.
If
you
need
additional
silver-bearing
solder
for
main
tenance
purposes
you
can
purchase
it
from
Tek
tronix
in
one-pound
spools.
51/54C
—
MAINTENANCE
—
PAGE
1
ADJUSTMENT
PROCEDURE
The
following
outline
is
based
on
the
adjust
ment
procedure
used
in
our
test
department
here
at
the
factory.
Ordinarily,
adjustment
in
the
field
will
consist
of
touching
up
some
of
the
dc
level
and
balance
controls
as
outlined
in
the
OPERATING
INSTRUCTIONS,
but
if
a
re
adjustment
of
the
transient
response
is
ever
necessary
there
is
a
certain
sequence
that
should
be
followed.
The
input
capacitance
of
the
unit
is
accurately
set
to
20
µµf
at
the
factory.
This
insures
that
a
properly
adjusted
probe
can
be
used
interchange
ably
with
other
units
having
20-µµf
input
capaci
tance.
To
preserve
this
feature,
you
will
need
to
do
one
of
these
things:
(1)
use
a
CS-20
Input-
Capacitançe
Standardizer,
(2)
calibrate
a
P400-
Series
probe
against
a
plug-in
unit
known
to
be
in
correct
adjustment,
or
(3)
measure
the
input
capacitance
with
a
Type
130
L,C
meter
or
with
a
capacitance
bridge.
Peaking
Coils
As
a
preliminary
adjustment,
set
all
peaking-
coil
slugs
so
that
the
top
of
each
slug
is
flush
with
the
bottom
turn
of
the
winding.
(As
an
emergen
cy
measure,
these
settings
alone
are
adequate
for
approximately
correct
results.)
For
complete
calibration
of
the
peaking
coils,
plug
the
Type
53/54C
unit
into
a
540-Series
oscil
loscope
known
to
be
in
correct
adjustment.
Have
the
cabinet
or
side
panels
removed.
If
the
oscillo
scope
is
not
of
recent
manufacture,
you
will
have
to
drill
the
side
panel
of
the
plug-in-preamplifier
compartment
within
the
oscilloscope,
to
provide
access
to
the
adjustments
of
the
Type
53/54C
unit.
A
source
of
square
waves
or
pulses
having
a
rise
time
not
longer
than
3
millimicroseconds
is
needed.
The
repetition
rate
should
preferably
be
1
kc
or
more.
It
is
essential
that
this
source
be
terminated
in
accordance
with
the
manufacturer
’
s
specifications.
Turn
the
MODE
switch
to
A
ONLY,
the
VOLTS/CM
switch
to
0.05,
and
the
VARI
ABLE
control
full
right
to
the
CALIBRATED
position.
The
peaking
coils
affect
the
rise
and
leading
corner
of
the
square
wave
and
should
be
ad
justed
for
a
square
comer
with
no
overshoot.
1.
Adjust
L3523
and
L4413.
2.
Adjust
L3313
and
L3353.
3.
Adjust
L3073
and
L3253.
Move
the
square-wave
source
to
the
CHAN
NEL
B
input
connector
and
set
the
B-channel
controls
as
you
previously
set
the
A-channel
controls.
1.
Adjust
L4313
and
L4353.
2.
Adjust
L4073
and
L4253.
If
after
adjustment
one
channel
seems
to
have
a
better
response
than
the
other
try
a
slightly
different
setting
of
L3523
and
L4413,
which
are
common
to
both
channels,
and
then
repeat
steps
2
and
3
of
the
A-channel
adjustment
and
steps
1
and
2
of
the
B-channel
adjustment.
You
will
have
to
experiment
with
the
settings
of
L3523
and
L4413
to
find
which
setting
will
give
the
best
balance
of
response.
Input
Attenuators
There
are
two
types
of
adjustments
to
be
made.
Each
adjustment
requires
a
Type
105,
or
other
square-wave
source
having
a
rise
time
not
longer
than
0.025
µsec.
The
source
must
be
terminated
according
to
the
manufacturer
’
s
specifications.
One
type
of
adjustment
is
made
to
compensate
the
attenuators
so
the
ac
attenuation
is
equal
to
the
dc
attenuation.
This
involves
a
moderately
short
time
constant.
Misadjustment
can
be
rec
ognized
as
a
slight
rounding
or
overshoot
at
the
leading
corner
of
the
square
wave.
The
other
type
of
adjustment
is
made
to
get
equal
input
capacitances
at
all
positions
of
the
at
tenuator.
Misadjustment
can
be
recognized
as
a
downward
or
upward
slope
over
about
the
first
one-quarter
of
the
square
wave.
First
compensate
the
A-channel
attenuators.
Connect
the
probe
to
the
CHANNEL
A
input
connector
and
connect
the
square-wave
source
to
the
probe.
Display
four
or
five
cycles
of
a
1-kc
square
wave.
Set
the
VOLTS/CM
switch
to
.05
and
adjust
C3023
for
a
flat
top
on
the
square
wave.
Remove
the
probe
and
connect
the
square-wave
source
to
the
input
connector.
Adjust
the
listed
capacitors
for
a
square
corner
on
the
square
wave.
VOLTS/CM
Capacitor
.1
C4823C
.2
.5
1
2
5
C4833C
C4843C
C4853C
C4863C
C4873C
10
C4883C
20
C4893C
Connect
the
probe
to
the
CHANNEL
A
input
connector
and
connect
the
square-wave
source
to
the
probe.
Adjust
the
input
capacitance
with
the
VOLTS/CM
switch
in
the
positions
shown.
VOLTS/CM
.1
.2
.5
1
Capacitor
C4823B
C4833B
C4843B
C4853B
5S/54C
—
MAINTENANCE
—
PAGE
2
2
C4863B
5
C4873B
10
C4883B
20
C4893B
Repeat
the
above
operations
with
the
B-chan-
nel
amplifier.
Move
the
square-wave
source
to
the
CHANNEL
B
input
connector
with
the
probe
in
place
and
adjust
C4023
for
a
flat
top
on
the
square
wave.
The
VOLTS/CM
switch
should
be
in
the
.05
position.
Remove
the
probe
and
compensate
the
attenuator.
VOLTS/CM
.1
.2
.5
1
Capacitor
C4923C
C4933C
C4943C
C49S3C
2
C4963C
5
C4973C
10
C4983C
20
C4993C
Insert
the
probe
and
adjust
the
input
capaci
tance.
VOLTS/CM
.1
.2
.5
1
2
5
10
20
Capacitor
C4923B
C4933B
C4943B
C4953B
C4963B
C4973B
C4983B
C4993B
53/54C
—
MAINTENANCE
—
PAGE
3
ABBREVIATIONS
Cer.
ceramic
m
milli
or
IO"
3
Comp.
composition
Ω
ohm
EMC
electrolytic,
metal
cased
Poly.
polystyrene
EMT
electrolytic,
metal
tubular
Prec.
precision
f
farad
PT
paper
tubular
h
henry
Tub.
tubular
k
kilohm
or
10
3
ohms
V
working
volts
de
meg
megohm
or
10
“
ohms
Var.
variable
A*
micro
or
10"
“
w
watt
micromicro
or
10"
“
WW
wire
wound
GMV
guaranteed
minimum
value
DUAL
TRACE
PREAMP
Capacitors
C3
00
3
.l
µf
PT
Fixed
600
v
20%
285547
C3013
.01
µf
Cer.
Fixed
250
v
GMV
283003
C3023
.7-3
µµf
Tub.
Var.
500
v
281027
C3033
150
µµf
Cer.
Fixed
500
v
10%
281524
C3223
.005
µf
Cer.
Fixed
500
v
GMV
283001
C3253
47
µµf
Cer.
Fixed
500
v
20%
281518
C3633
.005
µf
Cer.
Fixed
500
v
GMV
283001
C3653
.001
µf
Cer.
Fixed
500
v
GMV
283000
C3673
.001
µf
Cer.
Fixed
500
v
GMV
283000
C3713
47
µµf
Cer.
Fixed
500
v
10%
281519
C3743
12
µµf
Cer.
Fixed
500
v
±1.2
µµf
281506
C3753
12
µµf
Cer.
Fixed
500
v
±1.2
µµf
281506
C3763
47
µµf
Cer.
Fixed
500
v
10%
281519
C4003
.1
µf
PT
Fixed
600
v
20%
285547
C4013
.01
µf
Cer.
Fixed
250
v
GMV
283003
C4023
.7-3
µµf
Tub.
Var.
500
v
281027
C4033
150
µµf
Cer.
Fixed
500
v
10%
281524
C4073
47
µµf
Cer.
Fixed
500
v
20%
281518
C4223
.005
µf
Cer.
Fixed
500
v
GMV
283001
C4503
.01
µf
Cer.
Fixed
500
v
GMV
283002
C4513
.01
µf
Cer.
Fixed
500
v
GMV
283002
C4563
.005
µf
Cer.
Fixed
500
v
GMV
283001
C4573
.005
µf
Cer.
Fixed
500
v
GMV
283001
C4583
.005
µf
Cer.
Fixed
500
v
GMV
283001
C4593
.005
µf
Cer.
Fixed
500
v
GMV
283001
Inductors
L3073
.5-1
µh
Var.
114043
L3083
.75
µh
Fixed
108072
L3253
.5-1
µh
Var.
114043
L3263
.75
µh
Fixed
108072
L3303
.75
µh
Fixed
108072
L3313
.9-1.6
µh
Var.
114051
L3343
.75
µh
Fixed
108072
L3353
.9-1.6
µh
Var.
114051
L3523
Special
114042
L3653
0.3
µh
Fixed
108112
L3673
0.3
µh
Fixed
108112
L4073
.5-1
µh
Var.
114043
L4083
.75
µh
Fixed
108072
L4253
.5-1
µh
Var.
114043
L4263
.75
µh
Fixed
108072
TYPE
53/54C
—
CIRCUIT
—
1
of
3
Inductors
(Continued)
L4303
.75
µh
Fixed
108072
L4313
.9-1.6
µh
Var.
114051
L4343
.75
µh
Fixed
108072
L4353
.9-1.6
µh
Var.
114051
L4413
Special
114042
Resistors
R3013
1
meg
½
w
Fixed
Prec.
1%
309014
R3023
1
meg
½
w
Fixed
Comp.
10%
302105
R3033
33
Ω
½
w
Fixed
Comp.
10%
302330
R3043
47
Ω
½
w
Fixed
Comp.
10%
302470
R3053
47
Ω
½
w
Fixed
Comp.
10%
302470
R3063
22
k2
w
Fixed
Comp.
10%
306223
R3083
470
Ω
½
w
Fixed
Comp.
5%
301471
R3093
27
Ω
½
w
Fixed
Comp.
10%
302270
R3113
5.6
k
1
w
Fixed
Comp.
5%
303562
R3123
650
Ω
Special
VARIABLE
311103
R3133
5.6
k
1
w
Fixed
Comp.
5%
303562
R3143
8k
5
w
Fixed
WW
5%
308053
R3153
10
k
2
w
Var.
ww
20%
GAIN
ADJ.
311015
R3213
20
k2
w
Var.
Comp.
20%
DC
BAL.
311018
R3223
22
k
1
w
Fixed
Comp.
10%
304223
R3233
560
Ω
½
w
Fixed
Comp.
10%
302561
R3243
100
k
½
w
Fixed
Comp.
10%
302104
R3263
470
Ω
½
w
Fixed
Comp.
5%
301471
R3303
47
Ω
½
w
Fixed
Comp.
10%
302470
R3313
100
k
½
w
Fixed
Comp.
10%
302104
R3323
2X100
k
2
w
Var.
Comp.
20%
VERTICAL
POSITION
311028
R3343
47
Ω
½
w
Fixed
Comp.
10%
302470
R3353
100
k
½
W
Fixed
Comp.
10%
302104
R35
0
3
1.8
k
1
w
Fixed
Comp.
10%
304182
R3513
8.2
k
1
w
Fixed
Comp.
5%
303822
R3523
400
Ω
Special
310518
R3543
100
k
½
w
Fixed
Comp.
10%
302104
R3603A
6k
5
w
Fixed
WW
5%
308052
R3603B
6k
5
w
Fixed
WW
5%
308052
R3623
5.6
k2
w
Fixed
Comp.
10%
306562
R3633
5.6
k
1
W
Fixed
Comp.
10%
304562
R3643
100
k
½
w
Fixed
Comp.
10%
302104
R3653
8.2
k
1
w
Fixed
Comp.
5%
303822
R3663
2X100
k
2
w
Var.
Comp.
20%
Positioning
Adj.
311051
R3673
8.2
k
1
w
Fixed
Comp.
5%
303822
R3703
33
k
2
w
Fixed
Comp.
10%
306333
R3713
160
k
½
w
Fixed
Comp.
5%
301164
R3723
220
k
½
w
Fixed
Comp.
10%
302224
R3753
220
k
½
W
Fixed
Comp.
10%
302224
R3763
160
k
¼
w
Fixed
Comp.
5%
301164
R3773
33
k
2
w
.
Fixed
Comp.
10%
306333
R3803
470
Ω
½
w
Fixed
Comp.
10%
302471
R3813
100
Ω
½
w
Fixed
Comp.
10%
302101
R3823
200
k
½
w
Fixed
Comp.
5%
301204
R3853
200
k
¼
w
Fixed
Comp.
5%
301204
R3863
100
Ω
½
w
Fixed
Comp.
10%
302101
R3873
470
Ω
½
w
Fixed
Comp.
10%
302471
R3903
4.7
k
½
w
Fixed
Comp.
10%
302472
R3913
100
Ω
½
w
Fixed
Comp.
10%
302101
R3933
68
k
1
w
Fixed
Comp.
10%
304683
©Ï
TYPE
53/54C-
-
CIRCUIT
—
2
of
3
Resistors
(Continued)
R3963
4.7
k
½
w
Fixed
Comp.
10%
302472
R3973
100
Ω
½
w
Fixed
Comp.
10%
302101
R4013
1
meg
½
w
Fixed
Prec.
1%
309014
R4023
1
meg
½
w
Fixed
Comp.
10%
302105
R4033
33
Ω
½
w
Fixed
Comp.
10%
302330
R4043
47
Ω
½
w
Fixed
Comp.
10%
302470
R4053
47
Ω
½
w
Fixed
Comp.
10%
302470
R4063
22
k
2
w
Fixed
Comp.
10%
306223
R4083
470
Ω
½
w
Fixed
Comp.
5%
301471
R4093
27
Ω
½
w
Fixed
Comp.
10%
302270
R4113
5.6
k
1
w
Fixed
Comp.
5%
303562
R4123
650
Ω
Special
VARIABLE
311103
R4133
5.6
k
1
w
Fixed
Comp.
5%
303562
R4143
8
k
5
w
Fixed
WW
5%
308053
R4153
10k
2
w
Var.
WW
20%
GAIN
ADJ.
311015
R4213
20
k2
w
Var.
Comp.
20%
DC
BAL.
311018
R4223
22
k
1
w
Fixed
Comp.
10%
304223
R4233
560
Ω
½
w
Fixed
Comp.
10%
302561
R4243
100
k
Yz
w
Fixed
Comp.
10%
302104
R4263
470
Ω
¼
w
Fixed
Comp.
5%
301471
R4303
47
Ω
½
w
Fixed
Comp.
10%
302470
R4313
100
k
½
W
Fixed
Comp.
10%
302104
R4323
2X100
k
2
w
Var.
Comp.
20%
VERTICAL
POSITION
311028
R4343
47
Ω
½
w
Fixed
Comp.
10%
302470
R4353
100
k
½
w
Fixed
Comp.
10%
302104
R4413
400
Ω
Special
310518
R4433
8.2
k
1
w
Fixed
Comp.
5%
303822
R4503
27
Ω
½
w
Fixed
Comp.
10%
302270
R4513
27
Ω
½
w
Fixed
Comp.
10%
302270
R4523
3k
5
w
Fixed
WW
5%
308062
Switches
SW3003
2
wafer
9
position
rotary
VOLTS/CM
260146
SW3013
single
pole
double
throw
slide
AC-DC
260145
SW3083
1
wafer
2
position
rotary
POLARITY
260148
SW3703
1
wafer
4
position
rotary
MODE
260147
SW4003
2
wafer
9
position
rotary
VOLTS/CM
260146
SW4013
single
pole
double
throw
slide
AC-DC
260145
SW4083
1
wafer
2
position
rotary
POLARITY
260148
Vacuum
Tubes
V3053
6AK5
I
nput
C.
F.
154014
V3083
12AU6
Input
Amplifier
154040
V3263
12AU6
Input
Amplifier
154040
V3303
6AU6
Output
Amplifier
154022
V3343
6AU6
Output
Amplifier
154022
V3503
12AT7
Output
C.
F.
154039
V3703
12AT7
Switching
Multivibrator
154039
V3803
6AL5
Trigger
Coupling
Diode
154016
V3903
12AT7
Amplifier
154039
V3953
12AT7
Switching
C.
F.
154039
V4053
6AK5
Input
C.
F.
154014
V4083
12AU6
Input
Amplifier
154040
V4263
12AU6
Input
Amplifier
154040
V4303
6AU6
Output
Amplifier
154022
V4343
6AU6
Output
Amplifier
154022
TYPE
53/54C
—
CIRCUIT
—
3
of
3
ABBREVIATIONS
Cer.
ceramic
m
milli
or
10
“
3
Comp.
composition
Ω
ohm
EMC
electrolytic,
metal
cased
Poly.
polystyrene
EMT
electrolytic,
metal
tubular
Prec.
precision
f
farad
PT
paper
tubular
h
henry
Tub.
tubular
k
kilohm
or
10
s
ohms
V
working
volts
de
meg
megohm
or
10
6
ohms
Var.
variable
0
micro
or
IO
-6
w
watt
AA
micromicro
or
10'
12
WW
wire
wound
GMV
guaranteed
minimum
value
ATTENUATOR
Capacitors
C4823B
.7-3
µµf
Tub.
Var.
500
v
281027
C4823C
.7-3
µµf
Tub.
Var.
500
v
281027
C4823D
8
µµf
Cer.
Fixed
500
v
±0.5
µµi
281503
C4833B
.
7-3
µµf
Tub.
Var.
500
v
281027
C4833C
.
7-3
µµf
Tub.
Var.
500
v
281027
C4833D
3.3
µµf
Cer.
Fixed
500
v
¼
µµi
281534
C4833E
3.3
µµf
Cer.
Fixed
500
v
281534
C4843B
.7-3
µµf
Tub.
Var.
500
v
281027
C4843C
.7-3
µµf
Tub.
Var.
500
v
281027
C4843D
2.2
µµf
Cer.
Fixed
500
v
±0.5
µµi
281500
C4843E
22
µµf
Cer.
Fixed
500
v
10%
281511
C4853B
.7-3
µµf
Tub.
Var.
500
v
281027
C4853C
.7-3
µµf
Tub.
Var.
500
v
281027
C4853E
47
µµf
Cer.
Fixed
500
v
10%
281519
C4863B
.7-3
µµf
Tub.
Var.
500
v
281027
C4863C
.7-3
µµf
Tub.
Var.
500
v
281027
C4863E
47
µµf
Cer.
Fixed
500
v
10%
281519
C4863F
47
µµf
Cer.
Fixed
500
v
10%
281519
C4873A
1
µµf
Cer.
Fixed
500
v
±0.2
281538
C4873B
.7-3
µµf
Tub.
Var.
500
v
281027
C4873C
.7-3
µµf
Tub.
Var.
500
v
281027
C4873E
250
µµf
Mica
Fixed
500
v
10%
283539
C4883A
1.0
µµf
Cer.
Fixed
500
v
±0.2
µµi
281538
C4883B
.7-3
µµf
Tub.
Var.
500
v
281027
C4883C
.7-3
µµf
Tub.
Var.
500
v
281027
C4883E
500
µµf
Mica
Fixed
500
v
10%
283541
C4893A
1.5
µµf
Cer.
Fixed
500
v
±0.5
µµi
281526
C4893B
.7-3
µµf
Tub.
Var.
500
v
281027
C4893C
.7-3
µµf
Tub.
V
ar.
500
v
281027
C4893E
750
µµf
Mica
Fixed
500
v
10%
283540
C4923B
.7-3
µµf
Tub.
Var.
500
v
281027
C4923C
.7-3
µµf
Tub.
Var.
500
v
281027
C4923D
10
µµf
Cer.
Fixed
500
v
10%
281504
C4933B
.7-3 µµf
Tub.
Var.
500
v
281027
C4933C
.7-3
µµf
Tub.
Var.
500
v
281027
TYPE
53/54C
—
ATTENUATOR
—
1
of
3
Capacitors
(Continued)
C4933D
3.3
µµf
Cer.
Fixed
500
v
281534
C4933E
3.3
µµf
Cer.
Fixed
500
v
281534
C4943B
.7-3
µµf
Tub.
Var.
500
v
281027
C4943C
.7-3
µµf
Tub.
Var.
500
v
281027
C4943D
2.2
µµf
Cer.
Fixed
500
v
±0.5
µµi
281500
C4943E
22
µµf
Cer.
Fixed
500
v
10%
281511
C4953B
.7-3
µµf
Tub.
Var.
500
v
281027
C4953C
.7-3
µµf
Tub.
Var.
500
v
281027
C4953E
47
µµf
Cer.
Fixed
500
v
10%
281519
C4963A
1
µµf
Cer.
Fixed
500
v
±0.2
µµi
281538
C4963B
.7-3 µµf
Tub.
Var.
500
v
281027
C4963C
.7-3 µµf
Tub.
Var.
500
v
281027
C4963E
47
µµf
Cer.
Fixed
500
v
10%
281519
C4963F
47
µµf
Cer.
Fixed
500
v
10%
281519
C4973A
1.5
µµf
Cer.
Fixed
500
v
±0.5
µµi
281526
C4973B
.7-3
µµf
Tub.
Var.
500
v
281027
C4973C
.7-3
µµf
Tub.
Var.
500
v
281027
C4973E
250
µµf
Mica
Fixed
500
v
10%
283539
C4983A
1.5
µµf
Cer.
Fixed
500
v
±0.5
µµi
281526
C4983B
7-3
µµf
Tub.
Var.
500
v
281027
C4983C
.7-3
µµf
Tub.
Var.
500
v
281027
C4983E
500
µµf
Mica
Fixed
500
v
10%
283541
C4993A
2.2
µµf
Cer.
Fixed
500
v
±0.5
µµi
281500
C4993B
.7-3
µµf
Tub.
Var.
500
v
281027
C4993C
.7-3
µµf
Tub.
Var.
500
v
281027
C4993E
750
µµf
Mica
Fixed
500
v
10%
283540
Resistors
R4823C
500
k-
½
w
Fixed
Prec.
1%
309003
R4823E
1
meg
½
w
Fixed
Prec.
1%
309014
R4833C
750
k
½
w
Fixed
Prec.
1%
309010
R4833E
333
k
½
w
Fixed
Prec.
1%
309053
R4843C
900
k
½
w
Fixed
Prec.
1%
309111
R4843E
111k
½
w
Fixed
Prec.
1%
309046
R4853C
950
k
½
w
Fixed
Prec.
1% 309143
R4853E
52.6
k
½
w
Fixed
Prec.
1%
309137
R4863C
975
k
½
w
Fixed
Prec.
1%
309144
R4863E
25.6
k
½
w
Fixed
Prec.
1%
309136
R4873C
990
k
½
w
Fixed
Prec.
1%
309013
R4873D
10
Ω
½
w
Fixed
Comp.
10%
302100
R4873E
10.1
k
½
w
Fixed
Prec.
1%
309034
R4883C
995
k
½
w
Fixed
Prec.
1%
309146
R4883D
10Ω
%
w
Fixed
Comp.
10%
302100
R4883E
5.03
k
½
w
Fixed
Prec.
1% 309134
R4893C
997.5
k
½
w
Fixed
Prec.
1%
309147
R4893D
10
Ω
½
w
Fixed
Comp.
10%
302100
R4893E
2.51
k
½
w
Fixed
Prec.
1%
309133
R4923C
500
k
½
w
Fixed
Prec.
1%
309003
R4923E
1
meg
½ w
Fixed
Prec.
1%
309014
R4933C
750
k
½
w
Fixed
Prec.
1%
309010
R4933E
333
k
½
w
Fixed
Prec.
1%
309053
TYPE
53/54C
—
ATTENUATOR
—
2
of
3
Resistors
(Continued)
R4943C
900
k
½
w
Fixed
Prec.
1%
309111
R4943E
111
k
½
w
Fixed
Prec.
1%
309046
R4953C
950
k
½
w
Fixed
Prec.
1%
309143
R4953E
52.6
k
½
w
Fixed
Prec.
1%
309137
R4963C
975
k
¼
w
Fixed
Prec.
1%
309144
R4963E
25.6
k
¼
w
Fixed
Prec.
1%
309136
R4973C
990
k
½
w
Fixed
Prec.
1%
309013
R4973D
10
Ω
¼
w
Fixed
Comp.
10%
302100
R4973E
10.1
k
½
w
Fixed
Prec.
1%
309034
R4983C
995
k
½
w
Fixed
Prec.
1%
309146
R4983D
10
Ω
¼
w
Fixed
Comp.
10%
302100
R4983E
5.03
k
½
w
Fixed
Prec.
1%
309134
R4993C
997.5
k
½
w
Fixed
Prec.
1%
309147
R4993D
10
Ω
½
w
Fixed
Comp.
10%
302100
R4993E
2.51
k
½ w
Fixed
Prec.
1%
309133
TYPE
53/54C
—
ATTENUATOR
—
3
of
3
£4963X1
_L
/
"T
C
53/54C
ATTENUATION
NETWORKS
4'19'57
K.
F
ABBREVIATIONS
USED
IN
OUR
PARTS
LISTS
GMV
guaranteed
minimum
value
Cer.
ceramic
m
milli
Comp.
composition
Ω
ohm
EMC
electrolytic,
metal
cased
Poly.
polystyrene
EMT
electrolytic,
metal
tubular
Prec.
precision
f
farad
PT
paper
tubular
h
henry
Tub.
tubular
k
thousands
of
ohms
V
working
volts
d
c
meg
megohms
Var.
variable
M
micro
w
watt
MM
micromicro
WW
wire
wound
ABBREVIATIONS
USED
IN
OUR
CIRCUIT
DIAGRAMS
Resistance
values
are
in
ohms.
The
symbol
k
stands
for
thousands.
A
resistor
marked
2.7
k
has
a
resistance
of
2,700
ohms.
The
symbol
M
stands
for
million.
For
example,
a
resistor
marked
5.6
M
has
a
resistance
of
5.6
megohms.
Unless
otherwise
specified
on
the
circuit
diagram,
capacitance
values
mark
ed
with
the
number
1
and
numbers
greater
than
1
are
in
µµl.
For
example,
a
capacitor
marked
3.3
would
have
a
capacitance
of
3.3
micromicrofarads.
Capacitance
values
marked
with
a
number
less
than
1
are
in
µl.
For
example,
a
capacitor
marked
.47
would
have
a
capacitance
of
.47
microfarads.
Inductance
values
marked
in
mh
are
in
millihenrys.
Inductance
values
mark
ed
in
uh
are
in
microhenrys.
Your
instrument
WARRANTY
appears
on
the
reverse
side
of
this
sheet.
IMPORTANT
Include
the
INSTRUMENT
TYPE
and
the
above
SERIAL
NUMBER
in
any
correspondence
regarding
this
instrument.
The
above
serial
number
must
match
the
instrument
serial
number
if
parts
are
to
be
ordered
from
the
manual.
Your
help
in
this
will
enable
us
to
answer
your
questions
or
fill
your
order
with
the
least
delay
possible.
WARRANTY
All
Tektronix
instruments
are
fully
guaranteed
against
defective
materials
and
workmanship
for
one
year.
Should
replacement
parts
be
required,
whether
at
no
charge
under
warranty
or
at
established
net
prices,
notify
us
promptly,
including
sufficient
details
to
identify
the
required
parts.
We
will
ship
them
pre
paid
(via
air
if
requested)
as
soon
as
possible,
usually
within
24
hours.
Tektronix
transformers,
manufactured
in
our
own
plant,
carry
an
indefinite
warranty.
All
price
revision
and
design
modification
privileges
reserved.
This manual suits for next models
1
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