Tektronix 7A24 Instruction Manual

TEKTRONIX®
INSTRUCTION
MANUAL
Tektronix,
Inc.
P.O. Box
500
Oregon
97005
Serial
Number
070-1485-00
873
WARRANTY
All
Tektronix
instruments
are
warranted against defective
materials
and workmanship
for one year.
Additionally,
all
Tektronix
Computer Display Terminals
and related
computer peripheral
equipment are fully
warranted
against
ANY trouble
for the first 90
days.
Any
equipment
trouble
occurring
to your Tektronix computer
terminal
or related
products during the
90 day period will
be repaired
by Tektronix
personnel
at no charge.
Questions
regarding warranty should
be discussed with your
Applications
Engineer.
Specifications
and price
change privileges reserved.
Copyright
©
1973
by Tektronix, Inc.,
Beaverton, Oregon.
Printed
in
the Unit^ States
of
America.
All rights reserved.
Contents of
this publication
may not
be reproduced in any
form
without
permission of Tektronix,
Inc.
U.S.A.
and foreign
Tektronix
products covered
by U.S. and
foreign
patents
and/or patents
pending.
TEKTRONIX
is
a registered
trademark of Tektronix,
Inc.
TABLE
OF
CONTENTS
Page
LIST OF ILLUSTRATIONS
iii
LIST OF TABLES
iii
SECTION 1 OPERATING
INSTRUCTIONS
PRELIMINARY
INFORMATION
1-1
Installation
1-1
GENERAL OPERATING
INFORMATION
1-1
Introduction
1-1
Signal
Connections 1-1
Vertical Gain Check and Adjustment 1-1
input Coupling 1-1 Input Protection Fuse
1-3
VOLTS/DIV
and VARIABLE Controls
1-3
CH 2 POLARITY Switch 1-3
DISPLAY MODE Switch
1-3
TRIGGER SOURCE Switch
1-3
Trace identification 1-4
BASIC
APPLICATIONS 1-4
General
1-4
Peak-to-Peak Voltage
Measurements 1-4
Instantaneous Voltage
Measurements 1-5
Comparison Measurements
1-5
Dual Trace Phase Difference
Measurements
1-6
High Resolution
Phase Measurements
1-7
Common Mode
Rejection
1-7
SECTION
2
SPECIFICATION
introduction
2-1
Electrical
2-1
Environmental
2-2
Physical
2-2
SECTION
3 THEORY OF OPERATION
INTRODUCTION
3-1
BLOCK DIAGRAM
3-1
CH 1 AND CH 2 ATTENUATORS
3-1
CH 1 AND
CH 2 AMPLIFIERS
3-2
DISPLAY SWITCHING
AND OUTPUT
3-3
CH 1 AND
CH 2 READOUT
3-3
TABLE
OF
CONTENTS
(cont)
SECTION
4
MAINTENANCE
Page
INTRODUCTION
4-1
PREVENTIVE
MAINTENANCE 4-1
General
4-1
Cleaning
4-1
Lubrication
4-1
TROUBLESHOOTING
4-1
General
4-1
Troubleshooting
Aids
4-1
Troubleshooting
Equipment 4-1
Troubleshooting
Procedure 4-2
CORRECTIVE
MAINTENANCE
4-3
General
4-3
Obtaining
Replacement
Parts
4-3
Soldering
Techniques
4-3
Component
Replacement
4-4
Circuit
Board Removal
4-4
Switch
Replacement
4-5
Recalibration
After
Repair 4-6
SECTION
5
CALIBRATION
PRELIMINARY
INFORMATION
5-1
Calibration
Interval
5-1
Tektronix
Field Service
5-1
Using
This Procedure
5-1
TEST EQUIPMENT
REQUIRED 5-1
General
5-1
Special Calibration
Fixtures 5-1
Calibration
Equipment
Alternatives 5-1
Preliminary
Procedure
5-3
PART
I
-
PERFORMANCE
CHECK
5-4
Introduction
5-4
Outline
for Part
1
-
Performance
Check
5-4
Performance
Check
5-4
PART
II
-
SHORT-FORM
PROCEDURE 5-7
Introduction
5-7
Short-
Form
Procedure
5-7
PART
III
-
CALIBRATION
PROCEDURE
5-10
Introduction
5-10
Outline
for Part
3
-
Calibration
Procedure
5-10
Calibration
Procedure
5-10
SECTION
6 ELECTRICAL
PARTS
LIST
Parts
Ordering
Information
Abbreviations
SECTION
7
DIAGRAMS
AND CIRCUIT
BOARD
ILLUSTRATIONS
Symbols
and Reference
Designators
7A24
TABLE
OF
CONTENTS
(cont)
SECTION 8
MECHANICAL
PARTS
LIST
Parts
Ordering
Information
Abbreviations
CHANGE
INFORMATION
LIST
OF
ILLUSTRATIONS
Number
Page
T1
7A24 Dual-Trace
Amplifier.
1-2
Release Latch.
1-1
1-3
7A24 Front-Panel
Controls
and Connectors. 1-2
1-4
Measuring
the peak-to-peak
voltage
of a waveform.
1-4
1-5
Measuring
instantaneous
voltage
with respect
to
some
reference.
1-5
1-6
Measuring
phase
difference
between two
signals.
1-7
1-7
High
resolution
phase
measurement
using
time-base
magnifier.
1-7
1-8
Using the
ADD mode for
common-mode
rejection. 1-8
5-1
Test circuit for
Input
Resistance
Check/Adjust.
5-3
5-2
Location
of pins 1
and
13,
U1550.
5-7
5-3
-(-Signal
Output location.
5-8
7-1
Semiconductor
Electrode
Configurations.
7-2
Circuit
Board
Locations.
7-3
A1
and A2
Attenuator
Board.
7-4
A5 Amplifier
Board.
7-5
A5
Amplifier
Board.
7-6
A5 Amplifier
Board.
7-7
A2 and
A4 Readout
Board.
7-8
Adjustment
Locations.
LIST
OF
TABLES
2-1
Electrical
Specifications.
2-1
2-2
Environmental
Specifications.
2-2
2-3
Physical
Specifications.
2-2
5-1
Test
Equipment.
5-2
5-2
Vertical
Deflection
Check.
5-5
5-3
Vertical
Deflection
Adjust.
5-11
iii
mi
@
PUSH
VAHiaBLE
(
CAL INI
VOLTS/DIV
5VRMS
MAX
INTERNALLV
FUSED
TiiiCCIIiR
SOURCS
SPLAY
>09E
CH
2 POLARITY
raa
@
PUSH
VARIABLE (CAL INI
VOLTS/DIV
6VRMS MAX
INTERNAUY
FUSED
tektROMxc
DUAL
TRACE
AMPLIFIER
7A24
7A24 FEATURES
The
7A24 is
a (jual-channel,
wiide-bancjwidth
amplifier
plug-in unit
(designed for use
with Tektronix 7000-series
Oscilloscopes. Each
channel has
an input
impedance of
50 ohms and
is internally fused.
Internal attenuators
and gain circuits
are switched
to
correspond
to
the settings
of the
VOLTS/DIV switches.
Channel
2 can
be
inverted and added
to channel 1 for
differential
measurements.
Fig. 1*1.
7A24 Dual-Trace
Amplifier.
7A24
Section
1—
7A24
OPERATING
INSTRUCTIONS
PRELIMINARY
INFORMATION
Installation
The
7A24 is calibrated
and ready for
use as received.
It
can be installed
in
any compartment
of Tektronix
7000-series oscilloscopes,
but is principally
used
in
vertical
plug-in
compartments.
To install,
align
the upper and
lower
rails of the
7A24 with the
oscilloscope
tracks and
fully
insert
it. The
front is
flush
with the front
of the
oscilloscope when
the
7A24 is fully
inserted,
and the latch
at the
bottom-left
corner
of the
7A24 will
be in place
against the
front panel.
See
Fig.
1-2.
To remove the
7A24,
pull on
the latch
(which
is
inscribed
with the unit
identification
"7A24") and the
7A24
will unlatch.
Continue
pulling on
the latch
to slide
the
7A24 out of the
oscilloscope.
RELEASE
LATCH
Fig. 1-2.
Release
Latch.
GENERAL
OPERATING
INFORMATION
Introduction
For
single-trace
operation,
either of the
two
identical
amplifier
channels
can be
used independently
by
setting the
DISPLAY
MODE
and TRIGGER
SOURCE switches
to
CH 1
or
CH 2
and
connecting
the signal
to
be observed
to
the
appropriate
input.
In
the
discussions to
follow,
single-trace
using
CH 1 only
apply
equally to
CH 2 only.
Signal
Connections
The
50-ohm
input
impedance
of
the
7A24
is
ideally
suited for
making
waveform
measurements
on 50-ohm
systems, in
that
50-ohm
coaxial
cables
can be
connected
directly
to
the
input
of the
7A24. The
7A24,
however,
should not
be connected
directly
to
a power
supply,
power
line, or
other voltage
source
that would
exceed the input
voltage
limits
of
the
7A24
(see
Specification
section. Table
2-1).
Probes
recommended
for
use with the
7A24 are the
P6056
(10X)
and P6057
(100X). Both probes
are
com-
patible
with
50-ohm
systems,
and will
allow
optimum
frequency
response.
These
probes
also
contain
trace
IDENTIFY
and
readout
encoding
functions,
A one-
megohm
imput
impedance
may
be achieved
by using the
P6051
FET
Probe.
Vertical
Gain
Check
and
Adjustment
To
check
the gain
of
either
channel,
set
the
VOLTS/D
IV
switch to
5 mV and
connect
a
40-millivolt,
one-kilohertz
signal
(20-millivolts
when
terminated
by
50-ohms)
from
the
oscilloscope
calibrator
to the
input
connector
of
the
channel
being
checked.
The
vertical
deflection
should
be
exactly
four
divisions.
If not,
adjust
the
front-panel
GAIN
for
exactly
four
divisions
of deflection.
The
GAIN
adjustment
is
engaged
by pressing
in the
GAIN
control
knob
and
turning
the
knob
with
a
narrow-blade
screwdriver
(see
Fig.
1-3,
Front-Panel
Controls
and
Connectors).
Turn
the
knob
clockwise,
then
counterclockwise,
until
the GAIN
control
is
engaged.
When
the
GAIN
control is
engaged,
the
vertical
deflection
will change
as the
knob is
turned.
Turn
the
GAIN
control
knob with
the
screwdriver
until the
deflection
is
set to exactly
four
divisions,
then
remove
the
screwdriver.
Input
Coupling
The
Channel
1
and
Channel
2
Input
(OFF-DC)
switches
select
the
signal
input
coupling
mode.
DC. The
DC position
couples
both
ac
and dc
compo-
nents
of the
signal
into
the
input
amplifier.
A
50-ohm
impedance
is
presented
to the
signal
source.
1-1
Operating
Instructions—
7A24
CH
1 POSITION
Controls position
of the
CH 1 trace
and
ADD display
mode trace.
CH 1 input
connector
provides
signal
connection
to CH
1.
CH
2 POLARITY
Provides
means of inverting
the
CH
2
display.
CH
2 POSITION
Controls the position of
the CH 2
trace
only. Disabled in ADD.
IDENTIFY (same
as CH
1)
Deflects trace
about 0.2 division
for
trace identification,
in instruments
with readout also
replaces readout
with
the word IDENTIFY.
CH 2 input
connector
Provides
signal connection
to CH
2.
TRIGGER SOURCE
Selects
source of the trigger
signal.
DISPLAY
MODE
Selects the
mode
of
operation.
VARIABLE
VOLTS/DIV (same
as
CH
1)
Provides
continuously
variable
uncalibrated
settings between
caii*
brated steps.
GAIN adjustment
When the
VARIABLE control is
pushed in,
it becomes
a
front-panel
screwdriver
adjustment for
calibra-
tion of
deflection
factor.
VOLTS/DIV
(same
as CH
1)
Selects
calibrated deflection
factors
from
5 mV/div to 1 V/div; eight
steps in
a
1-2-5
sequence.
Input
(same
as
CH
1
)
Selects signal input
mode.
Fig.
1-3.
7A24 Front-Panel
Controls
and Connectors.
Operating Instructions—7A24
OFF.
The
OFF
position disconnects the signal
source
from
the amplifier
and connects
it to a resistive 50-ohm
termination.
Input
Protection
Fuse
A fuse in the
input of
each channel protects
the
7A24
from
damage
due to excessive
signal voltages.
If this fuse is
open, no display
can be obtained.
If no waveform
can be
displayed, but
the
POSITION control
will move the
trace
on the
crt, check
the
condition of the
fuse.
The thick
film,
ceramic fuse is
located on the front
of
the
Attenuator
circuit
board.
A spare fuse is stored
on the
rear
of
the
board.
(See the
Maintenance
section of
this
manual
for fuse
replacement
instructions.) If fuse
replace-
ment is
necessary,
order a new
fuse to replace the
spare.
VOLTS/D
IV and
VARIABLE
Controls
The
amount
of vertical
deflection
produced by
a signal is
determined
by the
signal amplitude,
the attenuation
factor
of the
probe,
the setting
of the
VOLTS/D
IV switch, and
the setting
of the
VARIABLE
control.
Calibrated deflec-
tion
factors
indicated
by the
settings of
the VOLTS/DIV
switch
apply only
when the
VARIABLE control
is in the
calibrated
(CAL IN)
position.
The
VARIABLE
control provides
variable,
uncalibrated
settings
between the
calibrated
steps of the
VOLTS/DIV
switch.
With the
VARIABLE control
fully
counter-
clockwise
and
the
VOLTS/DIV
switch
set to
1 volt/division
the
uncalibrated
vertical
deflection
factor
is
extended
to at
least
2.5 volts/division.
By applying
a calibrated
voltage
source
to the
input
connector,
any
specific
deflection
factor
can
be set
within
the range
of the
VARIABLE
control.
CH
2
POLARITY
Switch
The
CH 2 POLARITY
switch
may be used
to invert the
displayed
waveform
of the signal
applied
to
the
CH 2
input.
This is
particularly
useful
in added
operation of the
7A24
when
differential
measurements are
to be made. The
CH 2
POLARITY
switch has
two positions,
-HJP and INVERT.
In
the -tUP
position,
the
displayed
waveform will have
the
same polarity
as the applied
signal and
a positive dc
voltage
will move the
crt
trace
up.
In
the
INVERT position,
a
waveform
at the
CH
2
input will
be displayed
on the
crt in
inverted
form
and a positive
dc voltage
will move
the trace
down.
DISPLAY
MODE
Switch
For
single-trace
operation,
apply the signal
either to
the
CH
1 input
or the
CH 2
input
and set the
DISPLAY MODE
switch
to the
corresponding
position:
CH 1 or
CH
2.
To display
a signal in
one channel
independently
when a
signal is also applied
to
the other
channel, simply select
the
desired channel
by setting
the
DISPLAY
MODE switch
to
the
appropriate
CH 1 or
CH
2
position.
Alternate
Mode.
The
ALT position
of the DISPLAY
MODE
switch produces
a display
which
alternates between
Channel 1
and Channel
2
with
each
sweep on the
crt.
Although
the
ALT mode can
be used
at all sweep rates,
the
CHOP
mode provides
a
more satisfactory
display at
sweep
rates below
about
0.5 millisecond/division.
At slow sweep
rates, alternate
mode
switching
becomes visually
perceptible.
Add Mode.
The
ADD position
of the
DISPLAY
MODE
switch can
be used
to display
the
sum or difference
of two
signals, for
common-mode
rejection
to remove
an undesired
signal, or for
dc
offset
(applying a
dc voltage
to one channel
to offset the
dc
component
of a signal
on the
other
channel).
The
overall
deflection
factor in the
ADD mode
with both
VOLTS/DIV
switches set
to the same
position is
the deflection
factor
indicated
by either
VOLTS/DIV
switch.
However,
if the
CH
1 and
CH 2 VOLTS/DIV
switches are
set
to different
deflection
factors,
the resultant
amplitude
is difficult
to
determine from
the
crt display. In
this case,
the voltage
amplitude
of the resultant
display
can
be
determined
accurately
only
if the
amplitude
of the signal
applied
to one
channel
is known.
In
the ADD mode,
positioning
of
the
trace
is controlled
by
the
Channel
1
POSITION control
only.
Chop
Mode. The
CHOP position of
the
DISPLAY
MODE switch
produces
a display
which
is electronically
switched
between
channels
at
approximately
a
500 kilo-
hertz
rate
(controlled
by
mainframe).
In
general the
CHOP
mode provides
the
best display
at sweep
rates slower
than
about
0.5
millisecond/division
or whenever
dual-trace,
non-repetitive
phenomena
is to
be displayed.
TRIGGER
SOURCE
Switch
CH
1. The
CH
1
position
of the
TRIGGER
SOURCE
switch
provides
a trigger
signal
obtained
from
the signal
applied
to the
CH 1 input
connector.
This
provides
a stable
display
of the signal
applied
to the
CH
1
input
connector.
CH 2. The
CH
2
position
of
the
TRIGGER
SOURCE
switch
provides
a trigger
signal
obtained
from
the signal
applied to the
CH 2 input
connector.
This
provides
a
stable
display of the
signal
applied
to
the
CH 2
input
connector.
MODE.
In this
position
of the
TRIGGER
SOURCE
switch,
the trigger
signal for
the
time-base
unit is dependent
Operating
Instructions—
7A24
on the
setting
of the
DISPLAY
MODE switch.
The
trigger
source
for
each
position
of the
DISPLAY
MODE
switch
is
as
follows:
mode
trigger
signal
source
CH 1
Channel 1
CH
2 Channel
2
ADD
Algebraic
sum of
Channel
1
and
Channel
2
CHOP
Algebraic
sum of
Channel
1
and Channel
2
ALT
Alternates
between
Channel
1
and
Channel
2
Trace
Identification
When the
IDENTIFY
button is
pressed,
the trace
is
deflected
about
0.3 division
to
identify
the
7A24 trace.
This
feature is
particularly
useful when
multiple
traces
are
displayed.
In
instruments
with
readout,
pressing
the
IDENTIFY
button
also
replaces
the
deflection
factor
readout
with the
word
"IDENTIFY",
BASIC
APPLICATIONS
General
The
following
information
describes
the
procedures and
techniques
for
making
basic
measurements
with
a 7A24
and
the
associated
Tektronix
oscilloscope
and
time-base.
These
applications
are not
described
in
detail since
each applica-
tion
must
be adapted
to
the
requirements
of the
individual
measurements.
This
instrument
can also
be
used for many
applications
not
described
in
this
manual.
Contact
your
local
Tektronix Field
Office
or
representative
for
assistance
in making
specific
measurements
with this
instrument.
Peak-to-Peak
Voltage
Measurements
To make
peak-to-peak
voltage
measurements,
use the
following
procedure:
6.
Turn the
7A24 POSITION
control
so
the
lower
portion
of the
waveform
coincides with
one of the
graticule
lines
below the
center horizontal
line,
and the
top of
the
waveform
is
within the
viewing
area. With
the time-base
Position
control,
move the display
so one of the
upper
peaks lies
near the center
vertical
line
(see Fig.
1-4).
Fig. 1-4.
Measuring
the
peak-to-peak
voltage of
a waveform.
7.
Measure
the
divisions
of vertical
deflection
peak-to-
peak.
Check
that the
VARIABLE
(VOLTS/DIV) control is
in the
CAL IN position.
NOTE
This
technique
can also
be
used to make
measure-
ments
between
two
points
on the
waveform, rather
than peak
to
peak.
8.
Multiply
the
deflection
measured in
step 7
by the
VOLTS/DIV
switch setting.
Include
the
attenuation
factor
of the
probe
if used.
1
.
Apply
the signal
to either input
connector.
2. Set the
DISPLAY
MODE and
TRIGGER
SOURCE
switches
to display
the
channel
used.
3. Set the
Input
switch
to
DC.
EXAMPLE:
Assume that
the
peak-to-peak
vertical
deflection
is
4.5 divisions
(see Fig. 1-4)
using
a
10X
attenuator
probe,
and the
VOLTS/DIV switch
is set to
1
V.
Volts
Peak to
Peak
vertical
=
deflection
(divisions)
X
VOLTS/DIV
setting
probe
X
attenuation
factor
4.
Set
the
VOLTS/DIV
switch
to display
about five
Substituting
the given
values:
divisions
of the
waveform
vertically.
Volts
Peak-to-Peak
=
4.5
X 1
X
10
5. Set
the
time-base
Triggering
controls for
a stable
display.
Set the
time-base
unit to
a sweep
rate that
displays
several
cycles
of the
waveform.
The
peak-to-peak
voltage
is
45 volts.
1-4
Operating
I
nstructions—
7A24
Instantaneous Voltage Measurements
To measure the dc level at
a
given point
on a waveform,
proceed as follows;
1
,
Connect the signal to either input
2.
Set the DISPLAY
MODE and TRIGGER SOURCE
switches to display the channel
used.
3.
Set the
VOLTS/DIV
switch
to display about five
divisions
of
the waveform.
4.
Set the Input switch
to OFF and position the trace to
the bottom
graticule line
or other reference line.
If
the
voltage
is
negative
with respect to
ground, position the
trace to the
top
graticule
line.
Do
not move the
POSITION
control after this
reference line has
been
established.
NOTE
To measure
a
voltage level
with respect to a
voltage
other than ground, make the following changes to
step 4. Set the Input switch to DC and apply the
reference voltage to the input connector. Then
position the trace to
the
reference line.
Fig.
1-5.
Measuring instantaneous
voltage with respect
to
some
reference.
EXAMPLE;
Assume the vertical
distance measured
is
3.6
divisions
(see Fig. 1-5)
and the
waveform is
above the
reference
line
using
a
10X
probe
with a VOLTS/DIV
setting
of
,5 V.
Using the formula;
Instan-
vertical
VOLTS/
probe
taneous
=
distance
X
polarity
X DIV
X attenuation
Voltage
(divisions)
setting
factor
5. Set the Input switch
to DC. The ground reference line
can be checked at
any time by switching
to
the
OFF
position.
Substituting the
given
values:
Instantaneous
Voltage
=
3,6
X
+1
X 0.5 V X 10
6.
Set the
time-base
Triggering controls for a
stable
display.
Set
the
time-base
sweep
rate
for an optimum
The
instantaneous
voltage
is 18 volts,
display of the
waveform.
7.
Measure the distance
in divisions between the
refer-
ence line and the
point on
the waveform at which
the dc
level
is to be measured.
For example,
in Fig.
1-5
the
measurement is between
the reference line
and point
A.
8.
Establish
the polarity
of the waveform. With
the
CH 2
POLARITY switch
in the
+UP position, any point
above
the
reference line
is positive.
9.
Multiply the
distance
measured
in step 7
by
the
VOLTS/DIV
setting. Include
the attenuation
factor
of
the
probe, if
used.
Comparison
Measurements
In some
applications it
may
be desirable
to establish
arbitrary
units
of
measurement
other
than those
indicated
by the
VOLTS/DIV
switch.
This
is particularly
useful when
comparing
unknown
signals
to a reference
amplitude.
One
use for
the
comparison-measurement
technique
is to
facilitate
calibration
of equipment
where the
desired
amplitude
does not
produce
an exact number
of divisions
of deflection.
The adjustment
will
be easier
and
more
accurate if
arbitrary
units
of measurement
are established
so that
the correct
adjustment is
indicated
by an
exact
number
of divisions
of
deflection.
The following
procedure
describes
how to establish
arbitrary
units
of measure for
comparison
measurements.
1-5
Operating
Instructions—
7A24
To establish
an arbitrary
vertical
deflection
factor
based
upon
a specific
reference
amplitude,
proceed
as
follows:
Vertical
Conversion
=
Factor
3
V
4
X ,5 V
1.5
1.
Connect
the
reference
signal
to the
input
connector.
Set the
time-base
unit
sweep
rate
to display
several
cycles
of
the signal.
2. Set the
VOLTS/DIV
switch
and
the
VARIABLE
control
to produce
a display
which
is an
exact number
of
vertical
divisions
in
amplitude.
Do not
change
the
VARI-
ABLE control
after
obtaining
the
desired
deflection.
Then with
a
VOLTS/DIV setting
of
.2
V,
the
peak-to-
peak amplitude
of an
unknown
signal
which
produces
a
vertical
deflection
of five divisions
can be
determined
by
using
the
signal amplitude
formula
(step
6):
Signal
Amplitude
.2
V X 1.5
X
5
=
1.5
volts
3.
To
establish
an arbitrary
vertical
deflection
factor
so
the
amplitude
of
an
unknown
signal
can
be
measured
accurately
at any
setting
of the
VOLTS/DIV
switch,
the
amplitude
of the
reference
signal
must
be known.
If it is
not known,
it
can
be
measured
before the
VARIABLE
VOLTS/DIV
control is
set in
step
2.
4.
Divide
the
amplitude
of
the
reference
signal
(volts)
by
the
product
of the
vertical
deflection
(divisions)
established
in
step
2 and the
setting
of
the
VOLTS/DIV
switch.
This is
the
vertical
conversion
factor.
reference
signal
Vertical
amplitude
(volts)
Conversion
=
vertical
VOLTS/DIV
Factor
deflection
X
switch
(divisions)
setting
5.
To measure
the
amplitude
of an
unknown
signal,
disconnect
the
reference
signal
and connect
the
unknown
signal
to the
input
connector.
Set the
VOLTS/DIV
switch
to
a setting
that
provides
sufficient
vertical
deflection
to
make an
accurate
measurement.
Do not
re-adjust
the
VARIABLE
control.
Dual-Trace
Phase
Difference
Measurements
Phase
comparison
between
two
signals
of the
same
frequency
can
be
made using the
dual-trace
feature of
the
7A24.
This method
of
phase-difference
measurement
can
be used
up to the
frequency
limit
of the
oscilloscope
system.
To make
the
comparison,
use the
following
procedure:
1
.
Set the
CH 1
and CFI
2 Input
switches to
DC.
2. Set the
DISPLAY
MODE to
ALT or
CHOP. In
general,
CHOP
is more suitable
for low
frequencies
and
ALT is
more
suitable for
high frequencies.
Set
the
TRIGGER
SOURCE to
CH
1.
3.
Connect
the
reference signal
to the
CH 1 input
and
the
comparison signal
to
the
CH 2 input.
Use coaxial
cables
or probes
which have
similar
time-delay
characteristics
to
connect the
signals to the
input
connectors.
4.
If the
signals are
of opposite
polarity,
set the
CH 2
POLARITY
switch
to invert
the Channel
2 display.
(Signals
may be
of opposite
polarity
due to
180°
phase
difference;
if
so, take this
into account
in the final
calculation.)
6.
Measure
the
vertical
deflection
in
divisions
and
calculate the
amplitude
of the
unknown
signal
using
the
following
formula.
5.
Set the
VOLTS/DIV
switches and
the VARIABLE
controls
of the
two channels
so the displays
are equal and
about five
divisions in
amplitude.
Signal
^
VOLTS/DIV
Amplitude
setting
vertical
vertical
X
conversion
X deflection
factor
(divisions)
6. Set the
time-base unit
to a sweep
rate which displays
about
one cycle
of the
waveforms.
Set the
Triggering
controls
for
a
stable
display.
EXAMPLE:
Assume
a reference
signal
amplitude
of
3
volts,
a
VOLTS/DIV setting
of
,5
V
and
the
VARIABLE
control
adjusted
to
provide
a vertical
deflection
of four
divisions.
Substituting
these
values
in the
vertical
conver-
sion factor
formula
(step
4):
7.
Center the
waveforms
on the
graticule with
the
7A24 POSITION controls.
8.
Adjust
the time-base
Variable
Time/Div
control until
one cycle
of the
reference signal
occupies
exactly eight
1-6
Operating
Instructions—
7A24
horizontal
divisions
between
the second
and tenth vertical
lines
of the graticule
(see Fig. 1-6).
Each division
of
the
graticule
represents
45°
of
the cycle
(360°
^
8 divisions
=
45°/division).
The sweep rate
can now
be stated
in
terms
of
degrees
as 45°/division.
9. Measure the
horizontal
difference
between
corre-
sponding
points
on the
waveform.
High
Resolution
Phase
Measurements
More
accurate
dual-trace
phase
measurements
can be
made by increasing
the
sweep rate
(without changing
the
Variable
Time/Div
control).
One of the
easiest ways
to
increase the
sweep rate
is with
the time-base
Magnifier
switch.
Set the
Magnifier
to
X10
and determine
the
magnified
sweep rate
by dividing
the
sweep rate obtained
previously
by the amount
of
sweep magnification.
10.
Multiply the
measured
distance
(in
divisions)
by
45°/division
to
obtain the
exact
amount of
phase
difference.
EXAMPLE:
Assume
a
horizontal difference
of
0.3
division
with
a sweep
rate
of
45°/division as shown
in
Fig.
1-6.
Using the formula:
EXAMPLE:
If the
sweep
rate is
increased
10 times
by
the Magnifier,
the
magnified
sweep
rate is
45°
/division
T
io
=
4.5 /division. Fig.
1-7
shows
the same
signals
as used
in
Fig.
1-6
but with
the
Magnifier
set
to
X10. With a
horizontal
difference
of
3 divisions, the
phase difference
is:
horizontal
magnified
Phase
Difference
=
difference
X sweep rate
(divisions)
(degrees/division)
Phase
Difference
horizontal
difference
X
(divisions)
sweep
rate
(degrees/division)
Substituting
the given
values:
Phase
Difference
=
0.3
X
45°
The
phase
difference
is
13,5°.
Fig. 1-6.
Measuring
phase
difference
between
two
signals.
Substituting the
given values:
Phase
Difference
=
3
X
4.5°
The phase
difference
is
13.5°.
Fig. 1-7.
High
resolution
phase
measurement
using
time-base
magnifier.
Common
Mode
Rejection
The
ADD feature
of
the
7A24 can
be used
to display
signals which
contain
undesirable
components.
These
1-7
Operating
Instructions—
7A24
undesirable
components
can
be
eliminated
through
common-mode
rejection.
The
procedure
is as follows:
1
.
Set the
DISPLAY
MODE
switch
to
ALT or
CHOP
and
the
TRIGGER
SOURCE switch
to MODE,
2.
Connect the
signal
containing
both the
desired and
undesired
information
to the
CH
1 input
connector.
3.
Connect
a signal
similar
to the unwanted
portion
of
the
CH 1
signal
to the
CH
2 input
connector. For
example,
in
Fig.
1-8
a line-frequency
signal is
connected
to channel
2
to
cancel
out the
line-frequency
component of the
channel
1 signal.
4.
Set
both Input
switches
to the
DC position.
5.
Set
the
VOLTS/D
IV switches
so the signals
are
about
equal in
amplitude.
6.
Set the
DISPLAY
MODE
switch
to
ADD.
Set the
CH
2 POLARITY
switch
to INVERT
so the
common-mode
signals
are
of
opposite polarity.
7.
Adjust the
Channel
2 VOLTS/D IV
switch and
VARIABLE
control for
maximum
cancellation of
the
common-mode
signal.
The signal which
remains
should
be
only the
desired
portion of the
channel
1 signal.
EXAMPLE:
An example
of
this
mode of
operation is
shown in
Fig.
1-8.
The
signal
applied
to Channel
1 contains
unwanted
line-frequency
components
(Fig.
1-8A).
A corre-
sponding
line-frequency
signal
is
connected
to Channel
2
(Fig.
1-8B). Fig.
1-8C
shows
the
desired
portion of
the
signal
as displayed
when
common-mode
rejection is
used.
(A)
CHANNEL
1 SIGNAL.
-
m
1
m
^
^
'
«
•m
(C)
RESULTANT
DISPLAY.
The
above
procedure
can
also
be used
for examining
a
signal
superimposed
on some
dc level.
A
dc
voltage
of the
proper
polarity
applied
to Channel
2 can
be used
to
cancel
out the
dc
portion of
the
signal
applied
to Channel
1.
Fig. 1-8.
Using the
ADD mode for
common-mode rejection.
(A)
Channel
1 signal
contains desired
information
along with line-
frequency
component.
(B) Channel 2 contains line
frequency only.
(C) Resultant
CRT display
using
common-mode rejection.
Section
2—
7A24
SPECIFICATION
Introduction
The
following
electrical
characteristics
are valid
over
the
stated
environmental
range for
instruments
calibrated
at
an
ambient
temperature
of
+20°C to
+30°C,
and
after
a
twenty-minute
warmup
unless
otherwise
noted.
TABLE
2-1
Electrical
Characteristic
Performance
Requirement
Supplemental
Information
Deflection
Factor
Calibrated
Range
5 mV/Div
to 1 V/Div;
eight
steps
in a
1,
2,
5 sequence.
Gain Ratio
Accuracy
Within 2% of
indicated
deflection
factor
with
GAIN
adjusted
at
5 mV/Div.
Uncalibrated
(VARIABLE)
Continuously
variable
between
calibrated
steps;
extends
deflection
factor
to at
least
2.5 volts
per
division.
GAIN Range
Permits
adjustment
of
deflection
factor
for
calibrated
operation
with all
7000
-series
oscilloscopes.
Frequency
Response
Bandwidth
Depends upon
oscilloscope
used.
See the
oscilloscope
mainframe
specifica-
tions
or
the
current
Tektronix
catalog.
Maximum
Input
Voltage
5
volts
(0.5 watts).
Up to 10
volts
(2 watts)
can
be applied
to
the input
without
damage
to the instru-
ment.
Input
Characteristics
DC Resistance
VSWR
50.0 ohms,
within
2%.
Equal
to,
or less
than
1.25
at
5 mV
and
10
mV; equal
to,
or less
than
1.15
at
20 mV to 1
V;
from dc to
350
MHz.
Overdrive
Recovery
Time
0.1
millisecond
or less
to
recover
to
within
one
division
after
removal
of
over-drive
signal
of
up to
+lb divisions
or
—75
divisions
regardless
of
overdrive
signal
duration.
2-1
Specification—
7A24
Characteristic
Performance
Requirement
Supplemental
Information
Delay
Time Difference
Between
Channels
200
picoseconds
or less.
Channel
Isolation
50:1 display
ratio up
to 200 megahertz.
Common
Mode Rejection
Ratio
At least 1 0:
1 ,
dc to
50 MHz.
Chop Frequency
See the
oscilloscope
mainframe
specifi-
cations.
Display
Modes
Channel 1 only.
Dual-trace,
alternate
between
channels.
Added
algebraically.
Dual-trace,
chopped
between
channels.
Channel
2 only.
Trigger
Source
Selection
Channel 1
only.
Follows
DISPLAY
MODE
selection.
Channel 2 only.
TABLE
2-2
Environmental
Refer
to
the
specification for
the
associated
mainframe.
TABLE
2-3
Physical
Size
Fits all
7000-series
plug-in
compartments.
Weight
2 Pounds
9 Ounces
(1.2
Kilograms).
2-2
Section
3—
7A24
THEORY
OF OPERATION
INTRODUCTION
This section
of the manual
contains a
description
of the
circuitry
used in the
7A24. The
7A24 description
begins
with a
discussion
of the instrument
using the block
diagram
shown in
the
Diagrams section.
Then, each
circuit
is
described in
detail
using the block
diagram to
show the
interconnections
between
stages in each
major circuit
and
the
relationship
of the
front-panel
controls to the
individual
stages.
Complete
schematics
of each circuit are given
in the
Diagrams
section. Refer
to these
schematics throughout
the
following
circuit
description for
electrical values
and
relationship.
BLOCK
DIAGRAM
The
Channel
1 Amplifier
circuit
provides
gain setting,
variable
gain
control, and
trace positioning.
The Channel
2
Amplifier
provides
signal-polarity
inversion
in addition
to
gain setting,
variable
gain
control, and trace
positioning.
The signal
to
be displayed
on the crt
is applied
to the
CH 1 or
CH 2 input
connector. The
signal passes
through
the Input
switch,
where
it is either
connected
to the
attenuators
or
to a 50-ohm
dummy load.
The
VOLTS/DIV
switch selects
the
correct amount of
attenuation,
and
the
signal is
passed
to the
Switched-Gain Amplifier.
When the
VOLTS/DIV
switch is
set to the
5 mV and
10
mV
positions,
the
signal connected
to the input
connector
is
passed through
the
attenuators
without
attenuation.
When the
VOLTS/DIV
switch is
set in the
5 mV position, the
Switched-Gain
Amplifier
operates at
full
gain.
In all other
positions
of the
VOLTS/DIV
switch,
the
gain of
the
Switched-Gain
Amplifier
is
reduced by two.
Internal
gain
and balance
adjustments
are included
in the
Switched-Gain
Amplifier.
Overall
GAIN
and
VARIABLE
gain
are adjusted in
the
Gain
Amplifier.
Variable
Balance
and high-frequency
adjustments
are
also
controlled
in the
Gain Amplifier.
The
output
of
the
Gain
Amplifier is
connected
to the
Positioning
circuitry
where
the
POSITION and
IDENTIFY
functions
are
controlled.
Channel
2
is identical to
Channel
1,
with
the
exception
of the
polarity-inversion
function
in
Channel
2.
The Display and
Trigger
Channel
Switching
Amplifiers
provide differential
signal
outputs
for the
signal and trigger
lines,
from each
channel,
to
a common display
and trigger
output.
The
output of
the
Display
and Trigger Channel
Switching
Amplifiers
are
connected
to the oscilloscope
mainframe
via
the interface
connector.
Readout
encoding
circuitry
used
in the
7A24
is
standard
to the
7000-series.
CH 1
AND CH
2
ATTENUATORS
NOTE
The
CH 1 and
CH 2
amplifier
circuits are
identical
with
the exception
of the CH
2 GAIN stage
U2450,
which includes
a POLARITY
inverting
circuit. Oniy
CH
1 is described
in detail
throughout
this discussion.
Delay Line
and
Fuse
Signals
connected
to the
input
connector
passthrough
a
delay line
and a
0.2 amp.
fuse
(F100)
before
reaching the
Input
switch.
The
delay line
is
used to
produce
a
standardized
time
delay
through
the plug-in.
The fuse
protects
the
attenuators
and
amplifier
by
preventing
excessive
voltages
from reaching
these
components.
Input
Switch
Input
signals
can
be dc-coupled
or internally
discon-
nected.
S100A is a
cam-type
switch;
a contact
-closure
chart
showing
the
operation
is
given
on the schematic
diagrams.
When
the
Input
switch is
in
the DC
position, the
input
signal
is
connected
to the
attenuators.
The
OFF
position
opens
the signal
path
to
the attenuators
and connects
the
input
to
an internal
50-ohm
dummy
load. This
provides
a
ground
reference
without
the
need to
disconnect
the
applied
signal from
the input
connector, while
presenting
a
constant
50-ohm
load at
the input
connector.
Input
Attenuator
The
effective
overall
deflection
factor
of the
7A24 is
determined
by the setting
of
the
VOLTS/DIV switch,
S100B.
The basic
deflection
factor
is
5 millivolts
per
division of crt
deflection.
To increase
the deflection
factor
3-1
Theory
of
Operation—
7A24
to
the
values
indicated
on
the
front
panel,
precision
attenuators
are
switched
into
the
circuit.
S100B is
a
cam-type
switch.
The
dots on
the
contact-closure
chart
(see
Diagram
1
)
indicate
when
the
associated
contacts
are in
the
position
shown
(open
or
closed).
In
the
5 mV/Div
and
lOmV/Div
positions,
the
attenuators
are not
used;
the
input
signal
is
connected
directly
to
the
Switched-Gain
Amplifier.
The
lOmV/Div
position
decreases
the
gain
of
the
Switched-Gain
Amplifier.
For
switch
positions
above
lOmV/Div,
the
attenuators
are
switched
into
the
circuit,
singly
or
stacked,
to
produce
the
deflection
factor
indicated
on the
front
panel.
The
hybrid
attenuators
are
constant
impedance,
T-pad
dividers.
In
addition
to
providing
constant
attenuation
at all
frequencies
within
the
band-
width
of
the
instrument,
the
input
attenuators
are
designed
to maintain
the
same
input
impedance
(50
ohms)
for
all
settings
of the
VOLTS/D
I
V switch.
CH
1
AND
CH
2
AMPLIFIERS
Switched-Gain
Amplifier
The
coax
coupler
between
the
Attenuator
circuit
board
and
the
Main
Amplifier
circuit
board
acts
as a
balun
transformer
to
provide
differential
drive to
U1350 at
high
frequencies.
U1350 is
a
paraphase-type
amplifier
with
dual
differential
outputs.
In
the
5 mV
position,
full
drive
is
provided
from
pins
5
and
9
of
U1350
to the
U1450
load
resistors,
R1401
and
R1403.
In all
other
attenuator
positions,
the
signal-path
drive
current
through
the
load
resistors
is
divided
in
half.
The
other
half
is
diverted
through
pins
6
and
8
of
U1350
and is
dissipated
in
dummy-load
resistors
R1341
and
R1343.
R1337
sets
the
basic
gain
of
amplifier
U1350.
R1317
is
used
to
divide the
basic
gain
by
a factor
of
two
for ail
positions
of the
VOLTS/DIV
switch
except
5 mV.
CR1319
and
R1319
maintain
proper
collector
voltage
while
switching
between
the
5 mV
and
10
mV
positions.
Cl
332 and
R1332
are
thermal
compensations.
R1336
and
Cl 336
are
high-frequency
adjustments.
Fixed
length
inductors
and
capacitors
are
part
of the
Amplifier
etched
circuit
board
and
provide
T-coil
peaking
at the
input
of
U1350.
Gain
Amplifier
U1450 is
a
variable-gain
cascode
amplifier
which
sets
the
overall
channel
gain. The
GAIN
(R1423A)
and
VARIABLE
(R1423B)
controls
determine
the
ratio
of
base
currents
through
pins
11
and
12 of
U1450. The
base-current
ratio
determines
the
shared
collector
output
levels
between
pins
5,
6
and
8,
9.
R1436
provides
adjustable
low-frequency
compensation.
R1434,
C1436, and
RT1437
compensate
for
temperature
variations.
R1435,
C1435,
R1445,
and
L1445 are
adjust-
able
high-frequency
compensations.
U1450
input
T-coil
peaking
inductors
and
capacitors
are
part
of the
etched
circuit
board.
Dc
balance
over
the
variable
range
is
adjusted
by R1353.
Position
Circuit
Positioning
current
is
added
to
the
signal
current
of
111450
output
from
current
sources
Q1470
and
Q1490.
R1465
controls
the
voltage
at
the
bases
of
the current
sources,
which
in turn
determines
the
amount
of
position-
ing
current
added.
R1467,
R1465,
and
CR1465
provide
trace
shift
current
for the
IDENTIFY
function.
Display
Channel
Switching
Amplifier
The
third
cascode
amplifier,
U1550, is
used for
controlling
the
Channel
1
display
modes.
When
the
DISPLAY
CH 1
ON level
at pin 11
is HI,
the Channel
1
signal
passes
through
the
transistor
pair with
outputs
at pins
6
and
8 to
the
level
shifters.
At the
same time
the
DISPLAY
CH
1 OFF
level
at pin
12 is
LO, turning
off
the
second
transistor
pair
collectors,
pins
5 and 9. When
pin 11
is Hi,
Channel
1 is
displayed
and when
pin 12
is HI
Channel
1 is not
displayed.
Pins
11
and 12
are always
in
opposite
states, the
levels
being
selected
by the
DISPLAY
MODE
switch
S30A.
Trigger
Channel
Switching
Amplifier
U1750
is
a cascode
amplifier
used
as the
trigger switch,
and
operates
similarly
to the
Display
Channel
Switching
Amplifier,
U1550. The'
TRIGGER
SOURCE switch,
S30B
determines
the
base levels
on
pins 11
and
12 of
U1750 for
trigger
selection.
Output
Level
Shifting
Zener
diodes,
VR850,
VR854,
VR860,
and VR864
are
used
to
return
the display
signal
dc level
to zero volts
at the
plug-in
interface.
C850 and
C860 provide
a high-frequency
path
around the
zener
diodes.
R894
balances the
differen-
tial
output,
and
R896
sets the
common-mode
level
to zero
volts.
These
adjustments
compensate
for
variations in
the
zener
diodes.
Trigger
Output
Amplifier
Common
base
transistors
Q920
and
Q940 are
used as
Trigger
Output
dc level
shifters
to
return the
dc
level
to
zero volts
at the
plug-in
interface.
3-2
Theory
of Operation—
7A24
Channel
2 Gain-Polarity
Amplifier
CH
2
operation is the
same as
CH 1.
For
circuit number
reference
the prefix
number for
CH 1 is 1 and
CH 2 is 2.
For instance,
U2350 functions in
CH
2
the
same as does
U1350 in
CH
1, In
CH
2 a Polarity
feature is included
in
the
second cascode
amplifier,
U2450. S22A allows base
drives to
be reversed
to
U2450. Polarity Gain
R2411,
matches
the gain in both
polarity
positions.
DISPLAY
SWITCHING
AND OUTPUT
Translator
The
Translator,
Q1050
and
Q1070,
increase the
CHOP
and ALT
control
logic levels
from the
mainframe to
a
usable level in
the
7A24. CR1060
and CR1062
keep Q1050
and
Q1070 from going
into
saturation.
CH 1 AND
CH 2
READOUT
Readout
Encoding
The Readout
Encoding
circuit
consists
of switching
resistors
and
probe sensing
stage
Q620. This circuit
encodes
the
Channel 1
and
2,
Row and
Column output lines for
readout of deflection
factor,
uncalibrated
deflection
factor
(VARIABLE)
information,
and signal
inversion (Channel
2
only).
Data
is
encoded
on these
output
lines
by
switching
resistors between
them
and the time-slot
input
lines, or by
adding current
through
Q620.
R647-CR647 are
switched
between time-slot
three
(TS-3) and Column
output
line when
the
CAL
IN
switch is
in the uncal
position. This
results in the
symbol
>
(greater
than)
being displayed
preceding
the deflection
factor
readout.
R648 (Channel
2 only)
is switched between
TS-2
and the Column
output line
when the
CH 2 POLARITY
switch
is in the
INVERT
position. This
results in
the
symbol
4-
(inverted)
being
displayed
preceding the
deflec-
tion factor readout.
Switching
resistors
are used
to indicate
the setting of
the
VOLTS/DIV
switch
to the
mainframe
readout system.
The
VOLTS/DIV switch
is
a cam-type
switch.
The dots on the
contact-closure
chart
(see
Diagram
5)
indicate
when
the
associated
contacts
are closed.
R633,
R634, and R635
select the
number
1,
2,
or
5 depending
on the resistor
combination
that is
switched in.
R637 selects
the m (milli-)
prefix and
R639 selects
the
symbol
V
(volts)
in the
5 mV
through
.5
V (500 mV) positions
of
the
VOLTS/DIV
switch.
R638 selects
the symbol
V
in the
1
V
position.
R630,
R631, and the
output of
the probe
sensing stage
(Q620)
select
the decimal
point
(number of
zeroes) again
depending
on the
resistor
combination
switched in
by the
VOLTS/DIV switch.
Probe
sensing
stage
0620 identifies
the attenuation
factor
of the probe
connected
to the input
connector
by
sensing the
amount
of current
flowing
from the
current
sink through
the
probe
coding
resistance. The
output of
this circuit
corrects
the
mainframe
readout
system to
include the
probe
attenuation
factor. The
third contact
of
the input
connector
provides
the input
to the probe
sensing
stage from
the
probe
coding resistance
(coded probes
only;
see Operating
Instructions).
The third
contact
is also
used
for
the
IDENTIFY
input.
The coding
resistor
forms a
voltage divider
with
R621 through
CR621
to
the
—15
V
supply. The resultant
voltage
sets the
bias on
Q620 and
determines, along
with
emitter
resistor
R622, the collector
current.
When the —15
volt time-slot
pulse
is applied
to
Interface
Connector
B33,
Q620 is interrogated
and
its
collector
current
is added
to the
Column current
output
through
Interface
Connector
A37.
With
a IX probe
(or no
probe)
connected to the
input
connector,
Q620
is turned
off.
The deflection
factor
readout
is determined
by
the
VOLTS/DIV
switch position.
With a
10X
probe
connected,
the bias
on Q620 will
allow
100 microamperes
of collector
current
to flow.
This
increases
the deflection
factor
readout
by
a
factor of 10.
The IDENTIFY
button
(S1465
on Diagram
2 or
S2465
on
Diagram
3)
does two
things when
pressed:
1. It causes
the
trace
representing
the
appropriate
channel
of the
7A24 to
move
about
0.3 division
(see the
Front-Panel
Controls
and
Connectors, Fig. 1-3).
2. It forward
biases
CR621
and
Q620 to result
in a
sufficient
amount
of collector
current which,
when
added
to the
Column
current
output,
replaces the
deflection
factor
readout
with
the word
"IDENTIFY”.
These
two
actions
aid in
identifying
the
7A24 trace
when
multiple
traces
are
displayed.
When the IDENTIFY
button
is released,
the
deflection
factor readout
and
trace
position
are
restored.
CR1465
in CH
1,
and
CR2465 in
CH
2 isolate
readout
circuitry
from the
position
circuitry. For
further
informa-
tion
on
the
operation
of the
readout
system,
see the
oscilloscope
instruction
manual.
3-3
Section
4—
7A24
MAINTENANCE
INTRODUCTION
This section
of
the manual
contains
maintenance
information
for use in preventive
maintenance,
corrective
maintenance,
and troubleshooting
of
the 7A24.
Further
maintenance
information
relating
maintenance
can
be found in
the instruction
manuals
for
the
7000-series
oscilloscopes.
PREVENTIVE
MAINTENANCE
General
Preventive
maintenance,
consisting
of cleaning,
visual
inspection, etc.,
performed
on a regular
basis, will
improve
the reliability
of this
instrument.
Periodic
checks
of the
semiconductor
devices
used in
the unit
are not
recom-
mended as a
preventive
maintenance
measure.
Cleaning
^
CAUTION
^
Avoid
the
use of chemical
cleaning
agents
which
might
damage the
plastics
used in this
instrument.
Do
not
apply any solvent
containing
ketones,
esters
or
halogenated
hydrocarbons.
To
dean,
use only
water
soluble
detergents,
ethyl,
methyl or
isopropyl
alcohol.
Front Panel.
Loose dust may
be removed
with
a soft
cloth
or a dry
brush.
Water and mild
detergent
may
be
used;
however,
abrasive
cleaners should
not
be used.
interior.
Cleaning
the
interior of
the unit should
precede
calibration,
since
the
cleaning
process could
alter
the
settings
of the
calibration
adjustments.
Use
low-velocity
compressed air
to blow
off the
accumulated
dust. Flardened
dirt can
be removed
with
a soft
dry brush,
cotton-tipped
swab,
or
cloth
dampened
with
a mild detergent
and
water
solution.
Lubrication
Use
a cleaning-type
lubricant
on
shaft
bushings, inter-
connecting
plug
contacts,
and switch
contacts.
Lubricate
switch
detents
with a heavier
grease.
A lubrication
kit
containing
the
necessary
lubricating
materials
and
instruc-
tions is
available
through
any Tektronix
Field
Office.
Order
Tektronix
Part 003-0342-00.
TROUBLESHOOTING
General
The following
is
provided
to
augment
information
contained
in other
sections
of this
manual
when
trouble-
shooting
the
7A24. The
schematic
diagrams,
circuit
description,
and
calibration
sections
should
be
used to full
advantage.
The
theory
of
operation
section
gives
detailed
information
on circuit
behavior
and output
requirements.
Troubleshooting
Aids
Diagrams. Circuit
diagrams
are given
on foldout
pages in
Section
7. The circuit
number and
electrical
value of
each
component
in this
instrument
are
shown on
the diagrams.
Circuit
Boards.
The
circuit
boards used in
the 7A24
are
outlined
on the
schematic
diagrams,
and illustrations
of
the
boards are shown
on the
backs
of preceding
diagram
pages.
Each
board-mounted
electrical
component is
identified
on
the illustration
by its circuit
number.
Component
and
Wiring
Color
Code. Colored
stripes
or
dots on
resistors
and
capacitors
signify
electrical
values,
tolerances,
etc.,
according
to
the EIA
standard
color
code.
Components
not
color
coded
usually have
the value
printed
on the
body.
The insulated
wires
used for
interconnection
in
the
7A24 are
color
coded
to
facilitate
tracing
wires from
one
point to
another
in the
unit.
Semiconductor
Lead
Configuration.
The lead
configura-
tions
of the
semiconductor
devices
used in this
instrument
are shown
on
the foldout
page
preceding
the diagrams.
Troubleshooting
Equipment
The
following
equipment
is
useful
for
troubleshooting
the
7A24.
1.
Semiconductor
Tester-Some
method
of
testing the
transistors
and
diodes
used
in this
instrument
is
helpful.
A
transistor-curve
tracer
such
as the
Tektronix
Type 576 will
give the
most
complete
information.
Maintenance—
7A24
2.
DC
Voltmeter
and
Ohmmeter-A
voltmeter
is
re-
quired for
checking
voltages
within
the
circuits,
and an
ohmmeter for
checking
resistors
and diodes.
3.
Test
Oscilloscope—
A
test
oscilloscope
is
required
to
view
waveforms
at
different
points
in the
circuit.
A
Tektronix
7000-series
mainframe
equipped
with
a readout
system,
7D13
Digital
Multimeter
unit,
7B-series Time-Base
unit,
and
a
7A-series
amplifier
unit with
a
10X
probe will
meet the
needs
of both
items
2 and
3.
4.
Plug-in
Extender—
A fixture
that
permits
operation of
the unit
outside
of the
plug-in
compartment
for
better
accessibility
during
troubleshooting.
Order Tektronix Part
067-0589-00.
Troubleshooting
Procedure
This troubleshooting
procedure
is arranged
in an order
which
checks
the
simple
trouble
possibilities before
proceeding
with extensive
troubleshooting.
1.
Check
Control
Settings.
An
incorrect setting of
the
7A24
controls can
indicate a
trouble that
does not exist. If
there is
any question
about the
correct
function
or
operation
of a control
or front-panel
connector, see the
Operating Instructions
section.
2.
Check Associated
Equipment. Before proceeding
with
troubleshooting of
the 7A24 check
that the
equipment
used with this
instrument
is operating
correctly. If
possible,
substitute an
amplifier
unit known
to be operating
correctly into the
indicator
unit and
see if the problem
persists.
Check that the
input signals
are properly
con-
nected and that
the
interconnecting
cables
are not
defective.
3.
Visual Check.
Visually
check the portion of
the
instrument in
which the
trouble is
suspected.
Many
troubles
can be located
by visual
indications,
such as unsoldered
connections,
broken wires,
damaged
circuit boards,
dam-
aged components, etc.
4.
Check Input
Protection
Fuse. If no waveform
can be
displayed,
but
the
POSITION
control will
move the trace
on the crt, check
the
condition of the
input fuse.
(See
Component
Replacement for
fuse replacement
in-
structions.)
5.
Check Instrument
Performance.
Check the calibration
of the unit
or the
affected circuit,
by performing
the
Performance
Check in
Section
5. The apparent
trouble may
only
be a
result of
misadjustment,
and may
be corrected
by
calibration.
Complete
calibration
instructions
are
given in
Section
5.
6. Check Voltages.
Often
the
defective
component
or
stage can
be located
by
checking
the voltage
in the circuit.
7.
Check
Individual
Components.
The following
meth-
ods are
provided for
checking
the
individual
components.
Components
which
are soldered
in place
are
best checked
by
disconnecting
one end
to isolate
the
measurement
from
the effects
of
surrounding
circuitry.
NOTE
To locate
intermittent
or
temperature
sensitive
components,
Quite
Freeze
(Miller
Stephenson,
MS-240, Tektronix
Part
Number 006-0173-01)
is
recommended.
Dry
ice or
dichlordi-fluorremethane
(Freon
12,
Dupont
or
Can-O-Gas)
may also be
used.
A. TRANSISTORS.
The
best check of transistor
opera-
tion
is actual
performance under
operating conditions.
If
a
transistor
is suspected
of being defective,
it can
best be
checked
by substituting
a component
known to
be good;
however,
be sure that
circuit
conditions are not
such that
a
replacement
might
also be damaged. If
substitute
transistors
are not available,
use a dynamic
tester (such as
Tektronix
Type
576). Static-type
testers
may be
used, but since
they
do not check
operation
under simulated
operating
condi-
tions,
some
defects may
go
Be
sure the power
is
off
before
attempting
to remove or
replace any
transistor.
B.
DIODES,
A diode
can be
checked for
an open
or
shorted
condition
by measuring
the resistance
between
terminals.
With
an ohmmeter
scale having
an internal
source
of
between
800
millivolts
and 3 volts, the
resistance should
be very high
in
one direction
and very low when
the leads
are reversed.
'>
CAUTION
<
Do
not use
an ohmmeter scale
that has
a
high
internal
current.
High currents
may
damage the diodes.
C. RESISTORS.
Check resistors
with an ohmmeter.
Resistor
tolerance
is given
in the Electrical
Parts List.
Resistors normally
do not need
to be replaced unless
the
measured
value varies
widely from the
specified value.
D. CAPACITORS.
A
leaky
or shorted
capacitor can
be
detected by
checking resistance
with
an ohmmeter on the
4-2
Maintenance—
7A24
highest
scale.
Use an
ohmmeter
which
will not
exceed
the
voltage
rating
of the
capacitor.
The
resistance
reading
should
be high
after inital
charge of the
capacitor.
An
open
capacitor
can
best
be detected
with
a capacitance
meter,
or
by checking
whether
the
capacitor
passes
ac signals.
E. FUSES.
The
Input
Protection
Fuse
can
be
checked
by
measuring
the
resistance
from
the
center
conductor
of
the
Input
BNC
connector
to ground
(plug-in
frame).
This
resistance
should
be
approximately
50 ohms.
If the
input
appears
open, replace
the
fuse.
(See
Component
Replace-
ment
for fuse
replacement
instructions.)
F.
ATTENUATORS.
The
thick
film
attenuators
are
best
checked
by substitution.
If
only one
channel
of the
7A24 is
not
operating
properly,
and there
is
reason
to believe
an
attenuator
is
defective,
replace
the
suspected
with the
same
attenuator
from
the
other
channel
and check
instrument
operation.
If proper
operation
results,
order
a
new
attenuator,
(See
Component
Replacement
for
replace-
ment
instructions.)
7, Repair
and
Readjust
the
Circuit.
Special
techniques
required
to
replace
components
in this
unit
are given
under
Component
Replacement.
Be
sure
to check
the
perfor-
mance
of any
circuit
that
has
been
repaired
or that
has
had
any electrical
components
replaced.
Recalibration
of
the
affected
circuit
may
be necessary.
CORRECTIVE
MAINTENANCE
General
Corrective
maintenance
consists
of
component
replace-
ment and
instrument
repair.
Special
techniques
required
to
replace
components
in this
instrument
are given
here.
Obtaining
Replacement
Parts
Standard
Parts.
All
electrical
and
mechanical
part
replacements
for
the
7A24
can
be obtained
through
your
local
Tektronix
Field
Office
or
representative.
However,
many
of the
electronic
components
can be
obtained
locally
in
less time
than
is
required
to order
them
from
Tektronix,
Inc.
Before
purchasing
or
ordering
replacement
parts,
check
the
parts
list for
value,
tolerance,
rating
and
description.
NOTE
When
selecting
replacement
parts,
it is
important
to
remember
that
the
physical
size
and
shape
of a
component
may affect
the
performance
of
the
instrument,
particularly
at
high
frequencies.
AH
replacement
parts
should
be
direct
replacements
unless
it is
known
that
a
different
component
will
not
adversely
affect
instrument
performance.
Special
Parts.
In
addition
to the
standard
electronic
components,
some
special
parts
are
used in the
7A24. These
parts are
manufactured
or
selected
by
Tektronix,
Inc. in
accordance
with
our
specifications.
Most
of the
mechanical
parts used
in
this
instrument
have
been
manufactured
by
Tektronix,
Inc.
Order
all
special
parts
directly
from
your
local
Tektronix
Field
Office
or
representative.
Ordering
Parts.
When
ordering
replacement
parts
from
Tektronix,
Inc.,
include
the
following
information:
1
. Instrument
Type.
2. Instrument
Serial
Number.
3. A description
of
the part
(if
electrical,
include
circuit
number).
4.
Tektronix
Part
Number.
Soldering
Techniques.
Disconnect
the
instrument
from
the
power
source
before
soldering.
The
following
rules
should
be
observed
when
removing
or replacing
parts:
1. Use
a
low-wattage
soldering
iron
(not
over
15
watts).
2. Do
not
apply
more
heat,
or apply
heat
for a
longer
time,
than
is
absolutely
necessary.
3.
Use
some
form
of
vacuum
solder
remover
when
removing
multi-lead
devices.
4.
Do not
apply
any
solvent
ketones,
esters
or
halogenated
hydrocarbons.
5.
To clean,
use only
water-soluble
detergents,
ethyl,
methyl
or isopropyl
alcohol.
Circuit
Boards.
The
components
mounted
on the
circuit
boards
in the
amplifier
can be
replaced
using
normal
circuit
Maintenance—
7A24
board
soldering techniques.
Keep the
following
points in
mind when soldering
on the
circuit
boards;
I.Use a pencil-type
soldering
iron with
a
(wattage)
rating from
15 to
50
watts.
2.
Apply heat from
the soldering
iron to
the junction
between the component and
the circuit
board.
3. Heat-shunt the lead
to the
component
by means of a
pair
of long-nose
pliers.
4,
Avoid
excessive heating
of
the junction with the
circuit
board,
as this could
separate the
circuit board
wiring
from the
base material.
5.
Use
electronic
grade
60-40
tin lead
solder.
6.
Clip
off any excess
lead length
extending beyond
the
circuit
board.
Clean
off
any residual
flux with
a
flux-
removing
solvent.
Metal Terminals. When
soldering
metal terminals
(poten-
tiometers, etc.)
use
60-40
tin-lead
solder and
a 15 to
50
watt soldering iron.
Observe the following
precautions
when soldering metal
terminals:
1.
Apply only
enough heat
to make the solder flow
freely.
2.
Apply only enough
solder
to
form
a solid connection.
Excess solder
may impair the
function of
the part.
3.
If
a
wire
extends beyond
the solder joint, clip off the
excess.
4.
Clean the flux
from the solder
joint with a flux-
removing solvent.
Component
Replacement
Disconnect
the equipment from
the power
source
before
replacing components.
Fuse and
Attenuator
Replacement.
To remove fuses or
attenuators,
press
down on both ends of
the spring clip
and
push the
clip towards
the
bottom of circuit
board until the
clip
is disengaged
from
studs.
Remove the clip
and lift the
ceramic
fuse or
attenuator
straight
up and off the board,
being
careful
not to damage
cam switch
contacts.
When reinstalling
fuses or
attenuators,
align the ceramic
with
the
open end
towards the
bottom of the 7A24,
being
careful
not
to damage the
thick film with
mounting studs.
Slide the
open end
of clip
under the
top stud and align the
large
bottom hole
with the
bottom
stud. Press down
on
both
ends of the
spring clip
and push up
until the clip snaps
into
position.
Semiconductor
Replacement.
Transistors
should not
be
replaced
unless
actually defective.
If
removed from their
sockets
during
routing
maintenance,
return them to their
original
sockets.
Unnecessary
replacement
of
transistors
may
affect
the calibration
of this
instrument. When
transistors
are replaced,
check the performance
of the part
of
the
instrument which
may
be affected.
Replacement
semiconductors
should
be of the original
type
or a direct
replacement.
The pullout following
the
schematic
diagram
section
shows the lead configurations
of
the
semiconductors
used in this
instrument. If the
replacement
semiconductor
is
not
of
the original type,
check
the
manufacturer's basing
diagram for proper basing.
Circuit
Board
Removal
In
general, the
circuit boards
used in the
7A24 need
never
be removed
unless they
must
be
replaced.
Electrical
connections
to the
boards
are made by soldered
connec-
tions.
If
it is necessary
to replace
a circuit board
assembly,
use the
following
procedures.
A.
READOUT
CIRCUIT
BOARD
REMOVAL
1.
Disconnect the
wires connected
to the outside
of the
board.
2.
Remove the
screws holding
the board
to
the mounting
surface.
3.
Disconnect
the wires
connected to the inside
of the
board.
4.
Remove the
board from the unit.
5.
To
replace the
board, reverse the order of
removal.
4-4
Mai ntena
nee—
7A24
B. ATTENUATOR CIRCUIT BOARD REMOVAL
1
.
Remove the readout board for either channel
as
outlined in the
previous procedure.
2.
Disconnect the coaxial jumper
and
delay line
mount-
ing bracket from the
rear of the board.
3.
Disconnect the
input cable from the rear of the input
BNC
connector.
4.
Loosen the
front set screw on the VARIABLE control
shaft
coupling
(use a 0.050-inch hex-key wrench).
5.
Remove
the red VARIABLE control knob
and
fiberglass
rod from the control shaft.
6.
Remove the
VOLTS/DIV, and POSITION knobs using
a 1/16
inch
hex-key wrench.
(The IDENTIFY knob
will
pull off
with the
POSITION knob.)
7.
Remove
the
input
BNC connector, and
POSITION
control.
8.
Remove the
two screws from the bracket on the rear
of the board.
9.
Remove the attenuator
board with cam switch from
the
instrument.
10.
Replace
by reversing the removal procedure.
C. AMPLIFIER
CIRCUIT BOARD
REMOVAL
1.
Remove the
plastic plug-in
guide from the rear of the
instrument.
2.
Disconnect
the wires
connected to
the
amplifier
board
from
the
CFI
1
readout
board and all front
panel controls,
with
the
exception of
the TRIGGER
SOURCE/DISPLAY
MODE switch.
3.
Loosen the
hex-socket screw
in the coupling of both
the
VARIABLE
control shafts using
a 0.050-inch hex-key
wrench. Pull
both the
VARIABLE knobs
and
shafts
from
the front
of the
instrument.
4.
Loosen
the
hex-socket screws in both
the TRIGGER
SOURCE and
DISPLAY MODE knobs. Remove
knobs.
5.
Disconnect
the coaxial
jumper
and delay line mount-
ing
bracket from the
front of
the board.
6.
Remove
the screws
and nuts
securing the board
to the
chassis or other
mounting surface.
7.
Remove the
board
from the instrument.
8. To replace,
reverse
the order of
removal.
Switch
Replacement
The following
special
maintenance
information
is pro-
vided for the cam-type
switches.
;;
CAUTION
<
Repair
of cam-type
switches should
be undertaken
only
by experienced
maintenance
personnel.
Switch
alignment
and
spring
tension
of the contacts
must be
carefully
maintained
for
proper
operation of
the
switch.
For this reason,
it
is recommended
that
the
switch
assembly
be
replaced
as a unit.
For assistance
in
maintenance
of
cam-type
switches,
contact your
local Tektronix
Field Office
or representative.
A. CAM-TYPE
SWITCHES
A cam-type
switch
consists
of a
rotating cam, which
is
turned by the
front-panel
knobs, and
a set of
contacts
mounted on
an
adjacent
circuit
board. These
switch
contacts are actuated
by lobes
on the
cam. The
VOLTS/
DIV
and Input
cam-type
switches
can be disassembled
for
inspection,
cleaning,
repair,
or
replacement
as follows;
1.
Remove the
Readout
board
and the
Attenuator
board/switch
assembly
as described
previously.
The front
switch
section
on the
Attenuator
board
is the Input switch
and
the
rear
switch
section is
the VOLTS/DIV
switch.
The
switches
are now
open for
inspection
or cleaning.
2. To completely
remove the
switch
from the
board,
remove
the
two screws
and two
hexagonal
posts which
hold
the
cam-type
switch
to the
circuit board.
3. To
remove the cam
from
the front
support block,
remove
the retaining
ring from
the shaft
on the front of
the
switch
and slide the
cam
out of the
support
block. Be
careful not
to lose
the small
detent roller.
®
4-5
Maintenance—
7A24
4. To
replace
defective
switch
contacts,
follow
the
instructions
given in the
switch
repair kit.
5.
To
re-install
the
switch
assembly,
reverse
the
above
Recalibration
After
Repair
After any
electrical
component
has
been
replaced,
the
calibration
of
that
particular
circuit
should
be
checked,
as
well
as the
calibration
of other
closely
related
circuits.
Refer
to Section
5
for
these
procedures.
Section
5-7A24
CALIBRATION
PRELIMINARY
INFORMATION
Calibration
Interval
To
ensure
instrument
accuracy,
check
the
calibration
of
the
7A24 every
1000 hours
of
operation,
or
every six
months
if used
infrequently.
Before
complete
calibration,
thoroughly
clean
and
inspect
this
instrument
as
outlined
in
the
Maintenance
section
of the
manual.
Tektronix
Field
Service
Tektronix,
Inc.
provides
complete
instrument
repair
and
recalibration
at local
Field
Service
Centers
and the
Factory
Service
Center.
Contact
your local
Tektronix
Field
Office
or
representative
for
further
information.
Using
This
Procedure
Outline.
To aid
in
locating
a
step in
the
Performance
Check or
Calibration
an outline
is
given
preceding
Parti-Performance
Check
and Part
Ill-
Calibration
Procedure.
Performance
Check.
The
performance
of this
instrument
can
be checked
without
removing
the
covers
or
making
internal
adjustments,
by performing
only
Part I—
Perform-
ance
Check.
This
procedure
does not
check every
facet
of
the
instrument’s
calibration;
rather
it is
concerned
primarily
with those
portions
of the
instrument
essential
to
measure-
ment
accuracy
and
correct
operation.
Short-Form
Procedure.
A
short-form
calibration
pro-
cedure is
provided
for the
technician
experienced
with
the
7A24 as
a guideline
for the
calibration
of
this instrument,
in Part
1
1—Short-Form
Procedure.
Calibration
Completion
of
each step
in
Part
ill— Calibration
Procedure,
ensures that
this
instrument
meets the
electrical
specifications
given
in the front
of
this
manual.
Where
possible,
instrument
performance
is
checked
before
an
adjustment
is made.
For
best overall
instrument
performance
when
performing
a
complete
calibration
make
each
adjustment
to the
exact setting,
even
if
the
CHECK—
is within
the
allowable
tolerance.
Partial
Procedures.
A partial check
or
adjustment
is
often
desirable
after
replacing
components
or to touch
up
the
adjustment
of a portion
of the
instrument
between
major
recalibrations.
To
check
or adjust
only
part
of the
instrument,
set the
controls
as given
under
the
nearest
Control
Settings
and
use the
Equipment
Required
list
preceding
the
desired
portion
of
the step.
To
prevent
unnecessary
recalibration
of
other
parts of
the
instrument,
re-adjust only
if
the
tolerance
given
in the
CHECK-
part
of
the
step is not
met.
TEST
EQUIPMENT
REQUIRED
General
The
following
test
equipment
and
accessories,
or its
equivalent,
are
required
for
complete
calibration
of the
7A24.
Specifications
given
for
the
test
equipment
are the
minimum
necessary
for
accurate
calibration.
Therefore,
some of
the
specifications
listed
here
may differ
from
the
actual
performance
capabilities
of the
test equipment.
All
test
equipment
is assumed
to be
correctly
calibrated
and
operating
within
the
listed
specifications.
Detailed
oper-
ating
instructions
for
the
test
equipment
are
not given
in
this
Refer
to the
instruction
manual
for
the test
equipment
if
more
information
is
needed.
If
only
a
Performance
Check
procedure
is performed,
not all
of the
listed
test
equipment
will
be
required.
Items
used only
for
the
Calibration
procedures
are
indicated
by
footnote
1. The
remaining
pieces
of
equipment
are
items
common
to
both
the
Performance
Check
and
the Calibra-
tion
Special
Calibration
Fixtures
Special
Tektronix
calibration
fixtures
are
used only
where they
facilitate
instrument
calibration.
These
special
calibration
fixtures
are
available
from
Tektronix,
Inc.
Order
by part
number
through
your
local
Tektronix
Field
Office
or
representative.
Calibration
Equipment
Alternatives
All of the
listed
test
equipment
is
required
to
completely
check
and
calibrate
this
instrument.
However,
complete
checking
or
calibration
may
not
always
be
necessary.
The
user may
be
satisfied
with
checking
only
selected
charac-
teristics,
thereby
reducing
the
amount
of
test
equipment
required.
The
Performance
Check and
Calibration
Procedures
are
based on
the first
item
of
equipment
given
as an example
of
applicable
equipment.
When
other
equipment
is
substi-
5-1
Calibration—
7A24
tuted,
control settings
or
calibration
setup
may need
to be
altered
to
meet the
requirements
of the
substitute
equipment, if
the
exact item of
test
equipment given
as an
example in the
Test
Equipment
list is
not available,
first
check
the Specifications
column
carefully
to see if
any
other
equipment is available
which might
suffice. Then
check the
Usage column
to see what this
item
is used for. If
used for
a check
or adjustment
that is
of little
or
no
importance
to
your measurement
requirements,
the item
and corresponding
step(s) can
be deleted.
TABLE
5-1
Test Equipment
Description
Minimum
Specifications
Usage
Examples
1. Test Oscilloscope
Tektronix
7000-series.
500
MHz
bandwidth
required for
complete
procedure.
Used throughout
the
procedures
to provide
display.
a. Tektronix
7904
oscilloscope.
2. Time
Base
Plug-in
Unit
Tektronix
7B-series
time-base
unit. Fastest
sweep,
0.5 ns
required for
complete
procedure.
Used
throughout
the
procedures
to provide
sweep.
a. Tektronix
7B92 Time
Base.
3. Amplifier Plug-in
Unit^
Tektronix
7A-series
Differential
Amplifier unit.
Sensitivity,
at least
0.5 mV/div.; CMRR,
at least
10,000:1
Used
for Input
Resistance
Check
and Adjust.
a. Tektronix
7A22 Differential
Amplifier.
b. Tektronix
7A13
Differential
Comparator.
4. 50-Ohm Amplitude
Calibrator
Amplitude
accuracy, within
0.25%;
range,
30 mV to
2
V
into
50
Ohms; frequency,
1 kHz.
Used for
Gain Check
and
Adjust
and Display Mode,
Trigger
Source
Checks.
a. Tektronix
Calibration
Fixture
067-0508-00.
5.
High
Amplitude
Square-
Wave
Generator
3
Amplitude,
at least
100 V;
frequency,
at least
1 kHz.
Used (with
Tunnel
Diode
Pulser)
for High
Frequency
Compensation Check
and
Adjust.
a.
Tektronix
Type 106
Square-Wave
Generator.
b. Tektronix
Calibration
Fixture 067-0502-01.
c. See footnote
3.
6.
Tunnel
Diode Pulser^
Amplitude,
200 mV; Risetime,
less
than
100
pico-seconds;
Aberration,
less than
1%.
Used (with High
Amplitude
Square-Wave
Generator)
for
High
Frequency
Compensation Check
and
Adjust.
a. Tektronix
Calibration
Fixture 067-0554-00.
b. See footnote
3.
7.
Medium
Frequency
Constant-Amplitude
Signal
Generator
Frequency
range, to at least
50 MHz;
reference frequency,
50 kHz;
output amplitude,
at
least
50
millivolts
into
50
Ohms; amplitude
accuracy,
within
3%.
Used for
Common Mode
Rejection
Ratio Check
and
Display
Mode, Trigger
Source
Checks.
a.
Tektronix
Type 191
Constant-Amplitude
Signal
Generator.
b.
General
Radio 121
1-C
with
1263-C
Amplitude
Regulating
Power
Supply.
8.
High
Frequency
Constant-Amplitude
Signal
Generator
Frequency
Range, to
at
least
375 MHz; reference
frequency,
3 MHz; output
amplitude,
at
least
3 volts into
50 Ohms; amplitude
accuracy,
within
5%.
Used for
Bandwidth
Check.
a. Tektronix
Calibration
Fixture 067-0532-01.
b.
General
Radio
1362 with
1263-C
Amplitude
Regulating
Power Supply.
9. Dc Voltmeter
1
(VOM)
Sensitivity, less
than 2 volts
full
scale.
Used for
Output
Balance
Adjust
and Output
Level
Adjust.
a. Triplett
630-NA.
b. Simpson
262.
10. Plug-in
Extender*
Rigid plug-in
extender for
7000-series plug-ins.
Used for Trigger
adjustments
i
and checks.
a. Tektronix
Calibration
Fixture 067-0589-00.
11.
Cable
{two required)
Connectors, BNC; impedance,
50 Ohms;
length, 42 inches.
Used throughout
the
procedures.
a.
Tektronix
Part
012-0057-00.
5-2
Calibration—
7A24
TABLE 5-1
(cont)
Description
Minimum
Specifications
Usage
Examples
12.
Adapter
BNC male
to GR.
Used with
191,
106,
and
50
Ohm
Amplitude
Calibrator.
a.
Tektronix
Part
017-0064-00.
13. Adapter
BNC female
to
GR.
Used
with
Constant-
Amplitude
Signal
Generator
(067-0532-00).
a.
Tektronix
Part
017-0063-00.
14. 2X Attenuator
Connectors,
BNC;
impedance,
50 ohms.
Used
with
Tunnel
Diode
Pulser
(067-0554-00).
a.
Tektronix
Part
011-0069-01.
15. Dual-Input
Coupler (two
required)
Connectors,
BNC;
matched
signal
transfer
to each
input.
Used for
Common
Mode
Rejection
Ratio
Check
a.
Tektronix
Calibration
Fixture
067-0525-00.
16. Screwdriver
^
Three
inch
shaft,
3/32-inch
blade.
Used
for
adjusting
potentiometers.
a.
Xcelite
R-3323,
17.
L o w
-
C
apa c i t a n
c
e
Screwdriver
^
1 1/2-inch
shaft.
Used for
adjusting
variable
capacitors.
a.
Tektronix
Part
003-0000-00.
'Used for calibration
only: NOT
used for
performance
check.
^Any method of accurately
(40.5%) measuring
resistance
may be
substituted
for
this piece
of
equipment
and the
test circuit
shown
in
Fig. 5-1.
3Any pulse generator
that meets
the
specifications
for the Tunnel
Diode
Pulser
may
be substituted
for
these
two instruments.
50-OHM
AMPLITUDE
CALIBRATOR
OUTPUTS
TO DIFFERENTIAL
AMPLIFIER
PLUG-IN
Fig.
5-1.
Test circuit
for
Input Resistance
Check/Adjust.
Preliminary
Procedure
1.
Remove
left
side
covers
from
the
7A24 and the
test
oscilloscope
(only if
Short-Form
Procedure
or
Calibration
Procedure
is
to
be performed).
2.
Insert
the
7A24 into
the
test oscilloscope
Left
Vertical
compartment.
3. Insert
the
differential
amplifier
plug-in
unit
into
the
Right
Vertical
compartment.
4. Insert
the
time-base
plug-in
unit
into a
horizontal
compartment.
5.
Set the
7A24 front
panel controls
as follows:
CH 1 and
CH 2 POSITION
midrange
CH 1 and
CH 2
VOLTS/D
IV
5 mV
CH
1
and
CH 2 VARIABLE
VOLTS/DIV
CAL IN
CH
1 and
CH
2
Input
switches
DC
CH
2 POLARITY
4-UP
DISPLAY
MODE
CH 1
TRIGGER
SOURCE
MODE
6.
Apply
power
and allow
at least
20
minutes
warm-up
before
proceeding.
5-3
Calibration—7A24
PART
1
-
PERFORMANCE
CHECK
Introduction
The
following
procedure
is
intended
to be
used for
incoming
inspection
and periodic
calibration
checks
to
confirm
that the
7A24 is operating
within
acceptable
limits.
This
procedure
is
concerned
with
those
portions of
the
instrument
calibration
that
are
essential to
measurement
accuracy
and
correct
operation.
Removal
of the
side
covers
is not
necessary
to perform
this
procedure
in that
all checks
are
made from the
front
panel.
Outline
for Part
1
-
Performance
Check
1. Check
Input
Resistance
Page
5-4
2. Check
Offset
Current
Page
5-4
3. Check
2X Balance
Page
5-4
4. Check DC Balance
Page
5-4
5. Check
Vertical
Deflection
Accuracy
Page
5-4
6. Check
TRIGGER
SOURCE
and DISPLAY
MODE
Operation
Page
5-5
7. Check
High
Frequency
Compensation
Page
5-5
8.
Check
Common
Mode
Rejection
Ratio
Page
5-6
9. Check
Bandwidth
Page
5-6
10.
Check
Readout
and
IDENTIFY
Operation
Page
5-6
Performance Check
1.
Check Input
Resistance
a.
Set
the
test-oscilloscope
Vertical
Mode switch
to
Right.
b. Connect the
test circuit,
as shown in
Fig. 5-1, to the
CH
1 input.
c. Connect the
test circuit
outputs to the
differential
plug-in
-t
and
inputs.
d. Set the differential
plug-in
for
0.5
millivolts
per
division, ac
coupled.
e. Check
for less than
1.2 divisions
of display amplitude
(0.6
mV).
f. Remove the
test circuit
from the
CH 1 input.
g.
Connect
the test circuit
to
the CH 2 input.
h.
Repeat parts
e
and f,
substituting
CH 2
controls.
i. Remove all
connections
from the
test circuits.
2.
Check Offset
Current
a.
Set
the
test-oscilloscope
Vertical
Mode to Left.
b. Set the
7A24
CH
1
POSITION
control
to center the
trace
on the
graticule.
c. Check for
0.1 division,
or less,
trace shift while
switching
the
CH 1 Input
switch
between
the OFF and
DC
positions.
d. Set the
DISPLAY
MODE
switch to
CH 2.
e. Repeat
parts
b
and
c, substituting
CH 2 controls.
3.
Check
2X Balance
a.
Check for
0.5
division,
or less,
trace shift
while
switching
the
CH
2 VOLTS/D
IV switch
between the
5 mV
and
10
mV positions.
b.
Set
the
DISPLAY
MODE switch
to
CH 1
.
c. Repeat
part a, substituting
CH 1
controls.
4.
Check
DC Balance
a.
Set the
CH 1
VOLTS/DIV
switch
to 5 mV.
b. Engage the
CH 1 VARIABLE
gain control
by pushing
in, and
then releasing
the
VARIABLE knob.
c. Check
for
0.5 division,
or less, trace shift
while
rotating
the
VARIABLE
knob.
d. Reset the
CH 1
VARIABLE to the
CAL IN position
by again
pushing in
the
VARIABLE knob
and releasing.
e.
Set the
DISPLAY
MODE switch
to CH 2.
f.
Repeat
parts
a, b, c, and d,
substituting
CH 2
controls.
5.
Check Vertical
Deflection Accuracy
a. Connect
a 0.03-volt signal from the 50-ohm Ampli-
tude
Calibrator (067-0508-00)
to the CH 2 input.
b. Check, using the
VOLTS/DIV switch and 50-ohm
Amplitude Calibrator settings given
in Table 5-2, that the
vertical
deflection is within
2% for each position.
c. Remove the connection
from the
CH 2
input.
d.
Set the DISPLAY MODE switch to
CH
1
.
e. Repeat
parts
a
through
c, substituting CH 1 controls.
5-4
Calibration—
7A24
TABLE
5-2
Vertical
Deflection
Check
VOLTS/DIV
switch
setting
50 ohm
Amplitude
Calibrator
Vertical
Deflection
(divisions)
Maximum
Error
(divisions)
5 mV
.03 volts
6
1.2
10
mV
.06 volts
6
1.2
20
mV
0.1
2 volts
6
1.2
50 mV
0.30 volts
6
1.2
0.1
V
0.60 volts
6
1.2
0.2
V
1
.2 volts
6
1.2
0.5
V
2.0
volts
4
0.8
1
V
2.0 volts
2
0.4
6. Check
TRIGGER
SOURCE
and
DISPLAY
MODE
Operation
a.
Set the
CH 1
and CH
2
VOLTS/D
IV
switches
to
10
mV.
b.
Set the
DISPLAY
MODE
switch
to
ALT.
c.
Connect
the
medium-frequency
signal
generator
to
the
CH
2 input
and
set for
three
divisions
of
display
at
50 kHz.
d. Connect
a
0.03-volt
signal
from
the
50-ohm
Ampli-
tude
Calibrator
to the
CH 1 input.
e. Set
the
TRIGGER
SOURCE switch
to
CH 1.
f.
Check
that
both
signals
are
displayed,
but only
the
square wave
is
triggered.
g.
Set the
TRIGGER
SOURCE
switch
to MODE.
h.
Check that
both
signals
are
displayed
and
triggered.
i.
Set the
TRIGGER
SOURCE
switch
to CH
2.
j.
Check that
both
signals
are
displayed,
but
only
the
sine wave
is
triggered.
k. Set the
TRIGGER
SOURCE
switch
to
MODE.
l.
Set the
DISPLAY
MODE
switch
to
CH 1.
m.
Check that
only
the
square
wave
is
displayed
and
triggered.
n.
Set the
DISPLAY
MODE
switch to
ADD.
o. Set the
CH 1 Input
switch
to OFF.
p.
Check
that
only
the
sine
wave
is displayed
and
triggered.
q.
Set the
CH
1
Input
switch
to DC
and the
CH
2
Input
switch
to OFF.
r.
Check that
only
the
square
wave is
displayed
and
triggered.
s. Set the
DISPLAY
MODE
switch
to
CHOP.
t.
Check
that
the
square
wave
and
a straight
line
are
displayed
and
that
the
square
wave
is
triggered.
u.
Set the
CH
2 Input
switch
to
DC and
CH 1 Input
switch
to OFF.
V. Check
that
the
sine
wave
and
a straight line
are
displayed
and
that
the sine
wave
is
triggered.
w.
Set the
DISPLAY
MODE
switch
to CH
2.
X. Check
that only
the
sine
wave
is
displayed
and
triggered.
y.
Set
both
Input
switches
to DC.
z.
Remove
the
signals
from
the
CH 1
and
CH 2 inputs.
7.
Check
High-Frequency
Compensation
a.
Set the
7 A24
DISPLAY
MODE
switch
to CH 1
.
b. Set the
CH 1 and
CH 2
VOLTS/DIV
switches
to
20 mV.
c.
Connect
the
high-amplitude
square-wave
generator
to
the
Tunnel
Diode
Pulser
(067-0554-00)
input.
d.
Set the
time-base
for
10
ns/division.
e.
Connect
the
Tunnel
Diode
Pulser
output,
through
a
2X, 50-ohm
(011-0069-01),
to the
CH 1 input.
f.
Set the
pulser
level
control
to the
minimum
setting
which
will
produce
a
fast-rise
output.
g.
Set
the
top
of the
waveform
two
divisions
above
the
graticule
center
with
the
CH 1
POSITION
control.
h.
Check
for
peak-to-peak
aberration
of
6%
or
less.
i.
Remove
the
2X attenuator
and Tunnel
Diode
Pulser
from
the
CH 1
input.
j.
Repeat
parts
e, f,
g,
h,
and i,
substituting
CH
2
controls.
Calibration—
7A24
8. Check
Common
Mode
Rejection
Ratio
a. Set both
VOLTS/D
IV switches
to
5
mV,
b.
Set the
CH
2 POLARITY
switch
to
INVERT.
c. Connect
a
50
MHz
signal from
the
medium-frequency
signal
generator
to the
CH 1 and
CH 2 inputs through
a
Dual Input
cable (067-0525-00).
d. Set
the
signal
generator
amplitude
for eight
divisions
of display.
e. Set the
DISPLAY MODE
switch
to
ADD.
f.
Check for
0.8
divisions
of display,
or less.
g.
Remove the
connections
from the
7A24 inputs.
9. Check
Bandwidth
a. Set both
VOLTS/D
IV
switches
to 0.5 V.
b.
Set
the
CH
2
POLARITY
switch
to
-rUP.
c. Set the DISPLAY
MODE
switch
to CH
1
.
d. Connect the high
frequency
signal
generator
to the
CH 1 input.
e. Set the signal
generator
for six divisions
of display
at
its reference
frequency.
f.
Set the signal
generator frequency
to
375 MHz.
g.
Check
for at least
4.2 divisions
of display amplitude.
h.
Remove the
connection from
the
CH 1 input.
i.
Repeat parts
c, d, e, f,
g,
and h, substituting
CH
2
controls.10.
Check
Readout and
IDENTIFY
Operation
a. Set the
DISPLAY
MODE
switch to
ALT.
b. Check that
the channel
1
(upper) readout corre-
sponds
to the
CH
1
VOLTS/DIV
switch settings,
and that
the
channel
2
(lower) readout
corresponds to
the
CH 2
VOLTS/DIV
switch settings
for all
positions of
the
VOLTS/DIV switches.
c. Press the CH 1 IDENTIFY button,
d. Check that the
channel 1 readout
is replaced by the
word
“IDENTIFY",
and that the channel
1 trace moves
up
0.2 to 0.4 divisions.
e.
Release the
CH 1 IDENTIFY
button.
f.
Repeat parts
c, d, and e, substituting
CH 2 controls.
Calibration—
7A24
PART II
-
SHORT-FORM
PROCEDURE
BEFORE
YOU BEGIN,
see
ADJUSTMENT
LOCATIONS
in the Diagrams
section.
Introduction
The
following
procedure
is
intended
to be used
as a
guide
for
calibration
of the
7A24 by
experienced
techni-
cians familiar
with
the instrument.
All
steps are
in the same
order
as
in
the main
Calibration
Procedure. Only
essential
information
is
given. If
more information
is required,
consult the
Calibration
Short-
Form
Procedure
1. Adjust
Input
Resistance (DC,
5012,
±112)
a. Set both
VOLTS/DIV
switches
to
5 mV and
both
Input switches
to
DC.
b. Connect
the
test circuit,
as shown
in Fig.
5-1, to
the
CH
1
input.
c. Set
the differential
plug-in unit
for
0.5
mV per
division,
ac coupled.
d.
ADJUST
The
CH 1 Input
R
(R 1
307)
for
minimum
display
amplitude
(1.2 divisions
maximum).
e. Repeat
for
CH
2
(R2307).
2. Adjust
Offset
Current
(0.1 division
maximum
trace
shift)
a.
Set the
DISPLAY
MODE switch
to
CH 1.
b. ADJUST- The
CHI Offset
Null (R1305) for
minimum trace shift while
switching
the
CH
1 Input switch
between the OFF
and
DC
positions.
c. Repeat for
CH
2
(R2305).
3. ADJUST
2X
Balance
(0.5
division
maximum
trace shift)
a.
ADJUST
The
CH 1
2X
Bal
(R1324) for
minimum
trace shift
while switching
the
CH 1 VOLTS/DIV switch
between the
5 mV and 10
mV positions.
b.
Repeat for
CH
2
(R2324).
4. Adjust DC
Balance
(0.5 division, maximum
trace shift)
a. ADJUST
The CH 1
Dc Bal
(R1353) for
minimum
trace
shift while
rotating
the
CH
1
VARIABLE.
b. Repeat
for
CH
2
(R2353).
c.
Reset
VARIABLE
knobs
to
CAL IN.
5. Adjust Output
Balance
(within
0.5 division
of graticule
center)
a.
Set
the
DISPLAY
MODE
switch to CH 1.
b. Set the
CH 1 POSITION
for zero
volts between pins
1
and 13 of
U1550 (see Fig. 5-2).
Fig.
5*2.
Location
of
pins 1 and
13,
U1550.
Calibration—
7A24
c.
ADJUST
The
Out Bal
(R894)
to
center the
trace
on the
graticule.
6. Adjust
Output
Level
(0
volts,
±50
millivolts)
a. ADJUST
The
Out
Lev (R896)
for zero
volts from
the
+Signal
Output
(see Fig.
5-3)
to ground.
7.
Adjust
GAIN
(±2%)
a.
Set both
VOLTS/D
IV
switches
to
5 mV.
b. Connect
a
0.03
volt signal
from
the
50-ohm
Amplitude
Calibrator
to the
CH
1
input.
c.
ADJUST
The
CH
1 GAIN for
six
divisions
of
display
amplitude.
d. NOTE
If
the
CH 1
GAIN
cannot
be set
to six
divisions,
see the
main
Calibration
Procedure.
e. Engage
the
CH
1
VARIABLE
and
turn fully
counter-
clockwise.
f.
CHECK
The
display
amplitude
should
be
2.4
divisions
or less.
g.
Reset the
CH 1
VARIABLE
to CAL
IN.
h.
Set the
CH 1
VOLTS/DIV
to 10
mV and the
50-ohm
Amplitude
Calibrator
for
0.06 volts.
i.
ADJUST—
The
CH 1
2X Gain
(R1317) for
six
divisions
of display
amplitude.
j.
CHECK
That
the
gain is within
±2%
for all
positions
of the
CH 1 VOLTS/DIV
switch.
k. Repeat for
CH
2
(R2317).
8. Adjust
CH
2 POLARITY
Gain
a.
Set the
DISPLAY
MODE
switch to
CH 2 and
the
CH
2 VOLTS/DIV
switch
to
5 mV.
b. Connect
a
0.03-volt signal
from
50-ohm
Amplitude
Calibrator
to the
CH 2 input.
c. ADJUST— The Pol
Gain
(R2411) for
minimum
amplitude
change while
switching
the
CH 2 POLARITY
from H-UP
to
INVERT.
d. Recheck the
CH
2
gain for six
divisions
of display in
the +UP position.
9. Check
TRIGGER
SOURCE
and
DISPLAY
MODE
Operation
a.
Set both
VOLTS/DIV switches
to 10
mV.
b.
Connect
a 0.03-volt signal
from the 50-ohm
Ampli-
tude Calibrator
to the
CH 1 input.
c. Connect a
50-kHz signal
from the
medium-frequency
signal
generator
to the
CH 2
input
and
set for
three
divisions
of display.
d. CHECK
For proper
operation
of
the
DISPLAY
MODE and
TRIGGER
SOURCE
switches.
Fig. 5-3. +
Signal
Output
location.
5-8
Calibration—
7A24
10. Adjust
Low
Frequency
Compensation
a. Set the
time-base
for
0.2 milliseconds
per division.
b.
Connect a
0.06-volt signal
from
the 50-ohm
Ampli-
tude
Calibrator
to the
CH 1 input.
c. Set the
CH 1
VOLTS/D
IV to 10 ms.
d.
ADJUST—
The
CH
1
Lf (R1436)
for
minimum
long-term
tilt.
e. Repeat for
CH
2
(R2436).
11.
Adjust High
Frequency
Compensation
(6% aberration,
maximum)
a.
Set both
VOLTS/D
IV
switches
to 20 mV.
b. Connect
the Tunnel
Diode Pulser to the
CH
1 input
through a
2X attenuator.
c.
ADJUST-
The CHI
Hf adjustments
(C1336,
R1336,
C1435, R1435,
C1445, and R1445) for
the best
front corner
and flat
top.
d.
Repeat
for
CH
2
(C2336, R2336, C2435,
R2435,
C2445,
R2445),
12. Check
Bandwidth
(at least 375 MHz.)
a.
Set both
VOLTS/DIV switches
to 0.5
V.
b.
Connect the
high-frequency
signal generator
to the
CH 1 input
and set for
six divisions
of display
at its
reference
c. Set the
signal
generator frequency
to 375
MHz.
d.
CHECK
The display
amplitude should
be at least
4.2
divisions.
e. Repeat for
CH 2.
13. Check
Common
Mode
Rejection Ratio
(at least
10;
1)
a. Set both
VOLTS/DIV
switches
to 5 mV.
b. Set the
DISPLAY
MODE to
CH
2 and the
CH 2
POLARITY
switch
to INVERT.
c. Connect a
50-MHz
signal
from the
medium-frequency
signal
generator
to the
CH
1
and
CH 2
inputs
through a
Dual-Input cable
and set for eight
divisions of display.
d. Set
the
DISPLAY
MODE to
ADD.
e.
CHECK
The display
amplitude
should be
0.8
division,
or less.
f.
Reset the
CH 2 POLARITY switch
to +UP.
14.
Adjust
Trigger
Gain
(±10%)
a.
Exchange the
Plug-in
Extender cables
A-11 with
A-13
and
B-1 1
with
B-1 3.
b. Remove the
7A24
from
the test
oscilloscope, install
the Plug-in
Extender
into the
test oscilloscope
and install
the
7A24
into the
Plug-in
Extender.
c. Set the
CH 1
VOLTS/DIV
switch to 10
mV
and
the
DISPLAY
MODE
switch
to CH 1
.
d. Connect a
0.06-volt signal
from the 50-ohm
Ampli-
tude Calibrator
to
the CH 1
input.
e.
ADJUST
The
Trig
Gain (R946)
for six divisions
of
display
amplitude.
15.
Adjust
Trigger High
Frequency
Compensation
(15%
aberration
maximum)
a.
Set both
VOLTS/DIV
switches
to
20 mV.
b. Connect the
Tunnel
Diode
Pulser
to the CH 1 input
through
a
2X
attenuator.
c. ADJUST—
The
CHI Trig
adjustments
(C1721,
R1721
)
for the
best front
corner
and flat
top.
d.
Repeat for
CH
2.
16.
Check
Readout
and IDENTIFY
Operation
a.
CHECK
The channel
1 crt readout
should
corre-
spond to the
CH 1
VOLTS/DIV switch
settings,
and the
channel
2 readout
should
correspond
to the CH 2
VOLTS/
DIV switch
settings for
all switch
positions.
b. CHECK
The channel
1 readout
should be
replaced
by the word
"IDENTIFY"
and
the channel
1 trace should
move
up 0.2 to
0.4 divisions when
the
CH 1 IDENTIFY
button is
pushed.
c.
Repeat
part
b
for
CH 2.
5-9
Calibration—
7A24
PART
IN
-
CALIBRATION
PROCEDURE
BEFORE
YOU
BEGIN,
see
ADJUSTMENT
LOCATIONS in
the
Diagrams
section.
Introduction
The following
procedure
returns
the
7A24 to
correct
calibration.
All limits
and
tolerances
given in
this
procedure
are calibration
guides
and
should
not
be interpreted
as
instrument
specifications
except
as
specified in
the
Specifi-
cations
section
of this
manual.
Where
possible,
instrument
performance
is
checked
before
an
adjustment
is made.
For
best overall
instrument
performance
when
performing
a
complete
calibration
procedure,
make
each
adjustment
to
the
exact
setting
even
if the
CHECK- is within
the
allowable
tolerance.
Outline for
Part
3
-
Calibration
Procedure
1.
Adjust Input
Resistance.
Page
5-10
2. Adjust
Offset
Current.
Page
5-10
3. Adjust
2X Balance.
Page
5-10
4.
Adjust
DC Balance,
Page
5-10
5. Adjust
Output
Balance
Page
5-1
1
6. Adjust
Output
Level.
Page
5-1
1
7.
Adjust GAIN.
Page
5-1
1
8. Adjust CH
2 POLARITY
Gain.
Page
5-1
1
9, Check
TRIGGER
SOURCE
and
DISPLAY
MODE
Operation.
Page
5-12
10.
Adjust
Low Frequency
Compensation,
Page
5-12
11.
Adjust High
Frequency
Compensation,
Page
5-12
12.
Check
Bandwidth.
Page
5-13
13. Check
Common
Mode
Rejection
Ratio.
Page
5-13
14.
Adjust Trigger
Gain
Page
5-13
15. Adjust
Trigger
High Frequency
Compensation
Page
5-13
16. Check
Readout and
IDENTIFY
Page
5-14
Calibration
Procedure
1.
Adjust
Input
Resistance
(DC,
50fi ±112)
a. Set the
test
oscilloscope
to
display the
differential
plug-in
unit's
output.
b.
Connect
the
test circuit,
as
shown
in
Fig.
5-1, to the
CH 1
input
connector.
c.
Connect
the
test circuit
outputs
to the
+
and
-
inputs
of the
differential
plug-in
unit.
d. Set the
differential
plug-in
for
0.5 mV
per division,
ac
coupled.
e.
Set both
VOLTS/D
IV
switches
to
5
mV.
f.
Set the
CH
1 Input
switch
to
DC.
g.
Check
-
The
display
should
be
1.2 divisions
or less.
h.
ADJUST
The
CH 1 Input
R
(R1307)
for minimum
display
amplitude.
i.
Remove
the
test circuit
from
the
CH 1 input.
j.
Connect
the test
circuit
to the
CH
2
input.
k.
Repeat
parts f through
i,
substituting
CH
2 controls
(R2307).
2.
Adjust
Offset
Current
(0.1 division,
maximum
trace
shift)
a.
Set
the
test
oscilloscope
to display
the
7A24 output.
b. Set
the DISPLAY
MODE
switch
to
CH
1
.
c. Set the
CH
1
POSITION
control
to center
the
trace
on the
graticule.
d.
CHECK
The
trace
should
not move
more than
0.1
division
vertically
while
switching
the
CH 1 Input
switch
between
the
OFF and
DC
positions.
e.
ADJUST-
The
CHI Offset
Null
(R1305)
for
minimum
trace shift.
f.
Repeat
parts
b through
k, substituting
CH 2 controls
(R2305).
3. Adjust
2X Balance
(0.5
division,
maximum
trace
shift)
a. Set the
DISPLAY
MODE switch
to CH 1.
b. CHECK
The
trace
should
not move more
than
0.5
division vertically
while switching
the
CH 1
VOLTS/DIV
between the
5 mV and 10
mV positions.
c. ADJUST
-
The
CH 1
2X Bal (R1324) for
minimum
trace shift.
d.
Repeat parts
a, b, and
c, substituting
CH
2
controls
(R2324).
4. Adjust
dc Balance
(0.5 division,
maximum
trace shift)
a.
Set
the
DISPLAY
MODE switch
to CH 1
.
5-10
Calibration—
7A24
b. Engage the
CH 1
VARIABLE
VOLTS/DIV
by
push-
ing
in
and releasing
the knob.
c. CHECK
The trace
should
not
move more
than
0.5
division
while
rotating
the
CH 1
VARIABLE
from
fully
clockwise
to fully
counterclockwise.
d. ADJUST
The
CH 1
dc Bal
(R1353) for
minimum
trace shift.
e. Reset
the
CH 1
VARIABLE
to the
CAL IN
position.
f.
Repeat parts
a through
e,
substituting
CH 2 controls
(R2353).
5.
Adjust
Output
Balance
a.
Set the
DISPLAY
MODE
switch to
CH 1
.
b. Connect
a voltmeter
between
pins 1
and 13 of
U1550
(see Fig. 5-2).
c.
Set
the
CH 1
POSITION
control for
zero
volts on the
voltmeter.
d.
CHECK
The trace
should be
within
0.5 division
of
the
center
graticule
line.
e.
ADJUST
The
Out Bal
(R894)
to center
the
trace
on the graticule.
f.
Remove the
voltmeter
connections.
6.
Adjust
Output
Level
a. Connect
the
voltmeter
between
ground
and the
-r
Signal
Output
(see Fig. 5-3).
b. CHECK
The
voltmeter
should
read zero volts, ±50
millivolts.
c. ADJUST
The
Out
Lev (R896) for
zero
volts on
the
voltmeter.
d. Remove
the
voltmeter
connections.
7.
Adjust
GAIN
(±2%)
a.
Set both
VOLTS/DIV switches
to
5 mV.
b.
Connect
a
0.03-volt signal
from
the
50-ohm Ampli-
tude
Calibrator
to the
CH
1
input.
c. CHECK
The
Display
should
be six
divisions
in
amplitude,
within
2% (0.12 division).
d.
ADJUST
The
CH 1
GAIN by
pushing
in on
the
knob
with a
screwdriver
and
turning
it until
the
control
engages.
Set the
CH 1
GAIN for
exactly
six divisions
of
display
amplitude.
e. NOTE
If
the
CH 1 GAIN
cannot
be
adjusted for
six
divisions
of
display,
it
will
be necessary
to adjust
the
channel
1
internal
Gain
(R1337).
To do this,
set the
front
panel
CH 1
GAIN
to the center
of
its range
and
adjust the
channel
1
internal
Gain
for
as close
to six
divisions
of
display
amplitude
as
possible.
Repeat
step
d.
f.
Set the
CH
1 GAIN
knob
to the
VARIABLE
(out)
position
and
turn fully
counterclockwise.
g.
CHECK
The display
amplitude
should be
2.4
divisions
or less.
h.
Set the
CH 1
VARIABLE
to the
CAL IN position.
i.
Set the
CH 1
VOLTS/DIV
switch
to 10
mV.
j.
Set the
50-ohm
Amplitude
Calibrator
for
0.06 volts.
k. CHECK
The
display
should
be
six divisions
in
amplitude,
within
2% (0.12 divisions).
l. ADJUST-
The CHI
2X Gain (R1317)
for
six
divisions
of display
amplitude.
m.
CHECK
Using
Table
5-3, check
that gain is
within
±2%
for all
positions
of the
CH
1
VOLTS/DIV
switch.
n.
Remove the
connection
from
the
CH 1 input.
o. Repeat
parts
b through
n,
substituting
CH 2 controls
(R2337,
R2317).
TABLE
5-3
Vertical
Deflection
Adjust
VOLTS/DIV
!
50
ohm
Vertical
Maximum
switch
Amplitude
Deflection
Error
setting
Calibrator
(divisions)
(divisions)
5
mV
.03
volts
6
1.2
10 mV
.06 volts
6 1.2
20 mV
0.12
volts
6 1.2
50 mV
0.30 volts
6 1,2
0.1
V
0.60 volts
6 1.2
0.2
V
1 .2 volts
6
1.2
0.5
V
2.0 volts
4
0.8
1
V
2.0 volts
2
0.4
8.
Adjust CH
2 Polarity
Gain
a. Set the
DISPLAY
MODE
switch to
CH 2.
Cal ibration—
7A24
b. Connect
a 0.03
volt signal
from
the 50-ohm
Amplitude
Calibrator
to the
CH 2 input.
c. Set
the
CH 2 VOLTS/D
IV switch
to
5
mV.
d. Set the
CH 2
POLARITY switch
to INVERT.
e.
CHECK
The display
amplitude
should match
that
of the
-HJP
mode.
f.
ADJUST— The
Pol Gain
(R2411) for minimum
amplitude
change while
switching
between
the
INVERT
and +UP positions.
g.
Reset
the
CH 2 POLARITY
switch
to the h-UP
position.
h.
Recheck the
CH 2 GAIN
for six
divisions of display
amplitude
and reset
if necessary.
9.
Check
TRIGGER
SOURCE and
DISPLAY
MODE
Operation
a.
Set both
VOLTS/DIV
switches
to 10
mV.
b.
Set the
DISPLAY
MODE switch
to ALT.
c.
Connect
a 50-kHz signal
from the
medium-frequency
signal
generator
to
the
CH
2
input
and set
the generator
for
three
divisions of display.
d.
Connect
a 0.03-volt
signal from
the 50-ohm
Ampli-
tude Calibrator
to the
CH 1 input.
e. Set the TRIGGER
SOURCE
switch to
CH
1
.
f.
CHECK
Both signals
should
be
displayed,
but only
the
square wave should
be triggered.
g.
Set the
TRIGGER SOURCE switch
to MODE.
h. CHECK
Both
signals
should be displayed
and
triggered.
i. Set the TRIGGER
SOURCE switch
to CH 2.
j.
CHECK
Both signals
should
be displayed, but only
the sine wave should
be triggered.
k. Set
the
TRIGGER
SOURCE switch
to MODE.
l. Set the
DISPLAY MODE
switch to
CH
1
.
m.
CHECK
The square wave only
should be displayed
and triggered.
n. Set the
DISPLAY MODE
switch to
ADD.
o. Set
the
CH 1 Input switch
to OFF.
p.
CHECK
The sine
wave only
should
be displayed
and
triggered.
q.
Set the
CH 1 Input
switch to
DC
and
CH
2 Input
switch
to OFF.
r.
CHECK
The
square
wave only
should be displayed
and
triggered.
s.
Set the
DISPLAY
MODE
switch
to CHOP.
t.
CHECK
The
square
wave
and
a straight line
should
be
displayed and
the
square
wave
should be
triggered.
u. Set the
CH
2
Input
switch
to
DC and the
CH 1 Input
switch
to OFF.
V.
CHECK
The sine
wave
and a straight
line
should be
displayed
and
the sine
wave should
be triggered.
w.
Set the
DISPLAY
MODE
switch to
CH 2.
X.
CHECK
The sine
wave only
should
be
displayed
and
triggered.
y.
Set both
input
switches to
DC.
z.
Remove the
connections from
the
CH 1 and CH
2
inputs.
10.
Adjust Low
Frequency
Compensation
a. Set the
time-base for
0.2 milliseconds per division.
b. Set both
VOLTS/DIV switches
to 10 mV.
c. Connect
a 0.05-volt
signal from the 50-ohm
Ampli-
tude
Calibrator to the
CH 1 input.
d. Set the
DISPLAY
MODE switch to
CH
1.
e.
ADJUST— The
CHI Lf
(R1436)
for
minimum
long-term
tilt
of the
square wave flat-top.
f.
Repeat parts
c, d, and e, substituting
CH 2
controls
IR2436).
11.
Adjust
High Frequency
Compensation
(6%
aberration,
maximum)
a. Set the
time-base for 10
nanoseconds per division.
b. Set both
VOLTS/DIV switches
to
20
mV.
c. Set the
DISPLAY
MODE
switch
to CH 1
,
d. Connect the Tunnel
Diode Pulser (067-0554-00)
to
the
CH 1 input through
a 50-ohm,
2X
Attenuator
(011-0069-01).
5-12
Calibration—
7A24
e.
Connect
a 100-volt
square
wave
source
to the Tunnel
Diode Pulser
and
adjust the
Pulser
Level
to the minimum
setting
that
will
produce
a fast-rise
output,
f.
Position the
top
of the
waveform
to two
divisions
above the
graticule
center.
g.
CHECK
The
aberration
should
not
exceed ±4%
or
6%
peak-to-peak.
h.
ADJUST
The
Hf
compensations
(C1336,
R1336,
Cl
435,
R1435,
Cl
445,
and
R1445) for
the best
front
corner and flat
top.
i.
Remove
the
connection
from
the
CH 1 input.
j.
Repeat
parts
c through
i,
substituting
CH 2 controls,
(C2336,
R2336,
C2435,
R2435,
C2445,
and R2445).
12.
Check
Bandwidth
(at least
375 MHz)
a. Set both
VOLTS/DIV
switches
to
0.5 V.
b.
Set
the
DISPLAY
MODE
switch
to CH
1.
c. Connect
the
high-frequency
signal generator
to the
CH 1 input.
d. Set the signal
generator
for six
divisions
of display
at
its reference
frequency.
e.
Set the signal
generator
frequency
to 375 MHz.
f.
CHECK
The
display
amplitude
should be
at least
4.2
divisions.
g.
Remove the
connection
from
the
CH 1 input.
h.
Repeat
parts b through
g,
substituting
CH
2
controls.
13.
Check
Common
Mode
Rejection
Ratio
(at
least
10:1)
a.
Set both
VOLTS/DIV
switches
to
5 mV.
b. Set the
DISPLAY
MODE switch
to CH 2.
c.
Set the
CH
2 POLARITY
switch
to INVERT.
d. Connect
a
50-MHz signal
from
the
medium-frequency
signal
generator
to the
CH 1
and
CH 2 inputs
through
a
Dual
Input
cable
(067-0252-00),
e.
Set the
signal-generator
amplitude
for eight
divisions
of display.
f.
Set
the
DISPLAY
MODE to
ADD.
g.
CHECK
The
display
amplitude
should
be
0.8
division,
or less.
h.
Remove
the
connections
from
the
7A24 inputs.
i.
Reset
the
CH 2
POLARITY
switch
to -tUP.14.
Adjust
Trigger
Gain
(±10%)
a.
Exchange
the
Plug-in
Extender
(067-0589-00)
cables
A-11 with
A-13and
B-11 with
B-13.
b.
Remove
the
7A24 from
the
test
oscilloscope
and
install
the
Plug-in
Extender
into
the test
oscilloscope.
c. Install
the
7A24 into
the Plug-in
Extender.
d. Set the
CH 1
VOLTS/DIV switch
to 10 mV.
e.
Connect
a
0.06-volt
signal
from
the
50-ohm
Ampli-
tude
Calibrator
to the
CH 1
input.
f.
CHECK
The
display
amplitude
should be
six
divisions,
±0.6
division.
g.
ADJUST
The
Trig
Gain
(R946) for
six divisions
of
display
amplitude.
h.
Remove the
connection
from the
CH 1
input.
15.
Adjust
Trigger
High
Frequency
Compensation
(15%
aberration,
maximum)
a.
Set
the
time-base
for
10
nanoseconds
per
division.
b.
Set both
VOLTS/DIV
switches
to
20 mV,
c.
Set
the
DISPLAY
MODE
switch
to
CH 1.
d.
Connect
the
Tunnel
Diode
Pulser
(067-0554-00)
to
the
CH 1
input
through
a
50-ohm,
2X
Attenuator
(011-0069-01).
e.
Connect
a
100-volt
square
wave
source
to the
Tunnel
Diode
Pulser
and
adjust
the
pulser
level
to the
minimum
setting
which
will
produce
a fast-rise
output.
f.
Position
the top
of
the
waveform
to two
divisions
above
the
graticule
center.
g.
CHECK
The
aberration
should
not
exceed
15%
peak-to-peak.
h.
ADJUST—
The
CHI
Trig
adjustments
(C1721,
R1721
)
for
the
best
front
corner
and flat
top.
i. Remove
the
connection
from
the
CH 1 input.
j.
Repeat
parts
c through
i,
substituting
CH 2 controls.
k. Remove
the
Plug-in
Extender
and
insert
the
7A24
directly
into
the
test
oscilloscope.
5-13
Cal
ibration—7A24
16. Check
Readout and
IDENTIFY
Operation
a. Set the
DISPLAY
MODE switch
to ALT.
b. Rotate both
VOLTS/D
IV
switches
through their
range.
c. CHECK
The channel
1
(upper) crt readout
should
correspond
to
the
CH
1
VOLTS/DIV
switch settings,
and
the
channel
2
(lower) readout
should
correspond
to the
CH 2 VOLTS/DIV switch
settings
for all switch
positions.
d. Press the
CH 1 IDENTIFY
button.
e.
CHECK
The
channel
1 readout
should be replaced
by the
word "IDENTIFY"
and the
channel 1 trace should
move
up 0.2 to 0.4 division.
f.
Release
the
CH
1 IDENTIFY
button.
g.
Repeat
parts d,
e,
and f,
substituting
CH
2 controls.
5-14
Section
6—
7A24
ELECTRICAL
REPLACEABLE
PARTS
LIST
PARTS
ORDERING
INFORMATION
Replacement
parts
are
available
from or
through
your
local
Tektronix,
Inc.
Field
Office
or
representative.
Changes
to
Tektronix
instruments
are
sometimes
made
to
accommodate
improved
components
as
they become
available,
and
to
give
you the
benefit
of the
latest
circuit
improvements
developed
in our
engineering
department.
It is therefore
when
ordering
parts,
to include
the
following
information
in
your
order:
Part
number,
instrument
type
or number,
serial number,
and
modification
number
if
applicable.
If
a part
you
have
ordered
has been
replaced
with
a new
or
improved
part,
your
local
Tektronix,
Inc,
Field
Office
or
representative
will
contact
you
concerning
any
change
in part
number.
Change
information,
if
any, is
located
at the rear
of
this
manual.
SPECIAL
NOTES
AND
SYMBOLS
XOOO
Part first
added
at this serial
number
OOX
Part
removed
after
this serial
number
ITEM
NAME
In
the
Parts
List,
an Item Name
is
separated
from
the
description
by
a
colon
(:).
Because
of
space
limitations,
an Item
Name
may
sometimes
appear
as
incomplete.
For
further
Item Name
identification,
the
U.S.
Federal
Cataloging
Handbook
H6-1
can
be
utilized
where
possible.
ABBREVIATIONS
ACTR
ACTUATOR
PLSTC
PLASTIC
ASSY
ASSEMBLY
QTZ
QUARTZ
CAP
CAPACITOR
RECP
RECEPTACLE
CER
CERAMIC
RES
RESISTOR
CKT
CIRCUIT
RF
RADIO
FREQUENCY
COMP
COMPOSITION
SEL
SELECTED
CONN
CONNECTOR
SEMICOND
SEMICONDUCTOR
ELCTLT
ELECTROLYTIC
SENS
SENSITIVE
ELEC
ELECTRICAL
SEP
SEPARATELY
FXD
FIXED
VAR
VARIABLE
INCAND
INCANDESCENT
WW
WIREWOUND
LED
LIGHT
EMITTING
DIODE
XFMR
TRANSFORMER
NONWIR
NON
WIREWOUND
XTAL
CRYSTAL
6-1
CROSS INDEX
MFR.
CODE
NUMBER
TO MANUFACTURER
MFR.CODE
MANUFACTURER
ADDRESS CITY.STATE.ZIP
01121
01295
03508
07263
07910 12697 14193 18796
19701
24931 56289 71590
72982 73138 74970
75042
76854
78488 79727
80009 80294 81483
91637
Allen-Bradley
Co.
Texas
Instruments,
Inc.,
Components
Group
General
Electric
Co.,
Semi-Conductor
Products
Dept.,
Electronics
Park
Fairchild
Semiconductor,
A Div.
of
Fairchild
Camera
and
Instrument
Corp.
Teledyne
Semiconductor
Clarostat Mfg.
Co., Inc.
Cal-R,
Inc.
Erie
Technological
Products,
Inc.
State College
Division
Electra/Midland
Corp., A
North
American
Phillips
Co.
Specialty
Connector
Co., Inc.
Sprague
Electric
Co.
Centralab
Electronics,
Div.
of
Globe-Union,
Inc.
Erie
Technological
Products,
Inc.
Beckman
Instruments,
Inc.,
Helipot
Div.
Johnson
,
E .
F
. ,
Co
.
TRW
Electronic
Components,
IRC
Philadelphia
Div.
Oak Mfg.
Co.,
Division
of
Oak
Electro/Netics
Corp.
Stackpole
Carbon
Co.
Continental-Wirt
Electronics
Corp.
Tektronix,
Inc.
Bourns,
Inc.
International
Rectifier
Corp.
Dale
Electronics,
Inc.
1201
2nd St.
P. O.
Box
5012
464
Ellis
St.
12515
Chadron Ave
.
Lower
Washington
St
.
1601
Olympic
Blvd.
P.
O. Box 760
3560
Madison Ave.
5757
N. Green
Bav Ave.
644 W.
12th St.
2500 Harbor
Blvd.
299
10th Ave.
S.
W.
401 N. Broad
St.
S. Main
St.
P.
0.
Box 500
1200
Columbia Ave.
9220
Sunset Blvd.
P.
0. Box
609
Milwaukee,
WI
53212
Dallas,
TX
75222
Syracuse,
MY
13201
Mountain View,
CA
94040
Hawthorne,
CA 90250
Dover,
NH
03820
Santa
Monica,
CA 90404
State
College, PA
16801
Mineral
Wells,
TX 76067
Indianapolis,
IN
46227
North Adams, MA
01247
Milwaukee,
WI 53201
Erie,
PA
16512
Fullerton,
CA 92634
Waseca,
MN
56093
Philadelphia,
PA 19108
Crystal
Lake, IL 60014
St. Marys, PA
15857
Warminster, PA
18974
Beaverton, OR
97005
Riverside,
CA 92507
Los Angeles,
CA
90069
Columbus,
NB
68601
6-2
©
Electrical
Parts
List-7A24
Ckt No.
Tektronix
Part No.
Serial/Model
No.
Eff
Dscont
Name &
Description
Mfr
Code Mfr Part Number
A1
670-2464-00
CKT BOARD
ASSY:
CHI ATTENUATOR
80009
670-2464-00
A2
670-2310-00
CKT BOARD
ASSY: CHI READOUT
80009
670-2310-00
A3
670-2464-00
CKT BOARD ASSY:
CH2
ATTENUATOR
80009
670-2464-00
A4
670-2310-00
CKT BOARD ASSY:—
CH2
READOUT
80009 670-2310-00
A5
670-2710-00
CKT BOARD
ASSY: AMPLIFIER
80009
670-2710-00
C621
283-0000-00
CAP ,FXD,CER
DI:0.001UF, +100-0%,
500V
56289
40C626
C630
283-0000-00
CAP ,FXD,CER
DI:0.001UF, +100-0%, 500V
56289
40C626
C634
283-0000-00
CAP ,FXD,CER
DI:0.001UF,+100-0%,500V
56289
40C626
C635
283-0000-00
CAP ,FXD,CER
DI:0.001UF, +100-0%
,500V
56289
40C626
C638
283-0000-00
CAP ,FXD,CER
DI:0.001UF,
+10
0-0%
,500V
56289
40C626
C643
283-0000-00
CAP
,FXD,CER
DI:0.001UF, +100-0%,
500V
56289
40C626
C647
283-0000-00
CAP ,FXD,CER DI:0.001UF, +100-0%
,500V
56289
40C626
C648
283-0003-00
CAP ,FXD,CER
DI:0.01UF,+80-20%,150V
56289
20C205A1
C649
283-0000-00
CAP ,FXD,CER
DI:0.001UF, +100-0%,
500V 56289
4CC626
C850
283-0309-00
CAP ,FXD,CER DI:150PF,10%,50V
72982
CC1210C0G151K
C860
283-0309-00
CAP ,FXD,CER DI:150PF,10%,50V
72982
CC1210C0G151K
CS66
281-0603-00
CAP ,FXD,CER
DI:39PF,5%,500V
72982
308-OO0C0GO39OJ
C920
283-0010-00
CAP ,FXD,CER
DI:0.05UF, +100-20%, 50V
56289
273C20
C940
283-0010-00
CAP ,FXD,CER
DI:0.05UF, +100-20%, 50V
56289
273C20
C1012
283-0002-00
CAP ,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1014
283-0002-00
CAP ,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1018
283-0002-00
CAP ,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1022
283-0002-00
CAP ,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1024
283-0002-00
CAP ,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1028
283-0002-00
CAP
,FXD,CER DI:0.01UF,500V
72982
811-546F103Z
C1327
283-0000-00
CAP ,FXD,CER D1:0.001UF, +100-0%,
500V
56289
40C626
C1332
283-0203-00
CAP ,FXD,CER DI:0.47UF,20%,50V
72982
8131-050651474M
C1334
281-0629-00
CAP ,FXD,CER
DI:33PF,5%,600V
71590
TCZ33
C1336
281-0158-00
CAP ,VAR,CER
D1:7-45PF,50V
18796
518-000-G7-45
C1432
283-0083-00
CAP
,FXD,CER DI:0.0047UF,20%,500V
56289
33C154A1
C1435
281-0158-00
CAP ,VAR,CER D1:7-45PF,50V
18796 518-000-G7-45
C1436
283-0058-00
CAP
,FXD,CER DI:0.027UF,10%,100V
72982
8131N147C271K
C1445
281-0186-00
CAP ,VAR,PLSTC:1.1-3.5PF,100V
74970
273-0005-005
C1721
281-0123-00
CAP
,VAR,CER DI:5-25PF,100V
72982
518-000A5-25
C2327
283-0000-00
CAP ,FXD,CER
DI:0.001UF, +100-0%,
500V
56289
40C626
C2332
283-0203-00
CAP ,FXD,CER DI0.47UF,20%,50V0V
72982
8131-050651474M
C2334
281-0629-00
CAP ,FXD,CER
DI:33PF,5%,600V
71590 TCZ33
C2336
281-0158-00
CAP ,VAR,CER
D1:7-45PF,50V
18796
518-000-G7-45
C2413
283-0000-00
CAP ,FXD,CER
DI:0.001UF,+100-0%,500V
56289
40C626
C2432
283-0083-00
CAP ,FXD,CER
DI:0.0047UF,20%,500V
56289
33C154A1
C2435
281-0158-00
CAP ,VAR,CER
D1:7-45PF,50V
18796
518-000-G7-45
C2436
283-0058-00
CAP ,FXD,CER
DI:0.027UF,10%,100V
72982
8131N147C271K
C2445
281-0186-00
CAP ,VAR,
PLSTC : 1
.
1-3
.
5PF
, lOOV
74970 273-0005-005
C2721
281-0123-00
CAP ,VAR,CER DI:5-25PF,100V
72982
518-OOOA5-25
CR621
152-0141-02
SEMICOND
DEVICE:SILICON,30V,150MA
07910
CD8220
CR631
152-0141-02
SEMICOND DEVICE:
SILICON, 30V, 150MA
07910 CD8220
CR647
152-0141-02
SEMICOND DEVICE
: SILICON ,30V, 150MA
07910
CD8220
CR1050
152-0141-02
SEMICOND
DEVICE
:
SILICON,
30V, 150MA
07910 CD8220
CR1052
152-0141-02
SEMICOND DEVICE
:
SILICON,
30V, 150MA
07910 CD8220
CR1058
152-0141-02
SEMICOND
DEVICE
:
SILICON
, 30V ,
150MA
07910 CD8220
CR1060
152-0141-02
SEMICOND DEVICE : SILICON, 30V
,
150MA
07910 CD8220
CR1062
152-0141-02
SEMICOND DEVICE
:
SILICON, 30V, 150MA
07910
CD8220
CR1301
152-0141-02
SEMICOND DEVICE :SILICON, 30V, 150MA
07910 CD8220
CR1303
152-0141-02
SEMICOND DEVICE
: SILICON ,30V,
15
OMA
07910 CD8220
CR1319
152-0141-02
SEMICOND DEVICE
:
SILICON
,30V, 150MA
07910 CD8220
CR1465
152-0141-02
SEMICOND DEVICE : SILICON ,30V,
1501LA
07910 CD8220
CR1541
152-0141-02
SEMICOND DEVICE
:SILICON, 30V, 150MA
07910 CD8220
CR1543
152-0141-02
SEMICOND DEVICE
:
SILICON ,30V,
150MA
07910 CD8220
CR2301
152-0141-02
SEMICOND DEVICE : SILICON, 30V, 150MA
07910
CD8220
6-3
Electrical
Parts
List-7A24
Ckt
No.
CR2303
CR2319 CR2465
CR2476 CR2496
CR2541
CR2543
DLIO
FlOO
JIO
JlOO
J175 J830 J840
J850
J860
J1301
J2301
L1445
L2445
LRlOlO
LR1014 LR1020 LR1024
Q620 Q920 Q940
Q1050 Q1070
Q1470
Q1490 Q2470
Q2490
RlOO
RlOl
R106 RllO R119
R621
R622
R630 R631
R6
3 3
R634
R635
R636
R639
R640
R642
R643
R645
R646
R647
R648
R806 R808
R810
Tektronix
Part
No.
Serial/Model
No.
Eff
Dscont
Name
&
Description
Mfr
Code
Mfr Part
Number
152-0141-02
SEMICOND
DEVICE:
SILICON,
30V,
150MA
07910
CD8220
152-0141-02
SEMICOND
DEVICE
: SILICON
,30V,
150MA
07910
CD8220
152-0141-02
SEMICOND
DEVICE
: SILICON
,30V,
150MA
07910
CD8220
152-0141-02
SEMICOND
DEVICE
: SILICON,
30V,
150MA
07910
CD8220
152-014
1-02
SEMICOND
DEVICE
: SILICON,
30V,
150MJ\
07910
CD8220
152-0141-02
SEMICOND
DEVICE
:
SILICON,
30V,
150MA
07910
CD8220
152—014
1“
02
SEMICOND
DEVICE :
SILICON
,
30V,
150M.A
07910
CD8220
119-0419-00
DELAY LINE,
ELEC:
80009 119-0419-00
159-0118-00
FUSE,
THERMAL:
50 OHM
80009 159-0118-00
131-1171-00
CONN,
RCPT,
ELEC :BNC,
50 OHM
24931
28JR231-1
131-1003-00
CONN,
RCPT,
ELEC:
CKT BD MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC: CKT
BD MT
, 3 PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC:
CKT BD MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC: CKT
BD MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC: CKT BD MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC: CKT
BD MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,
RCPT,
ELEC: CKT BD
MT,3
PRONG
80009 131-1003-00
131-1003-00
CONN,RCPT,
ELEC
:
CKT
BD MT,3
PRONG
80009 131-1003-00
108-0420-00
COIL, FIXED
:60NH
80009
108-0420-00
108-0420-00
COIL,FIXED:60NH
80009 108-0420-00
108-0184-00
COIL,FIXED:3.2UH
80009 108-0184-00
108-0184-00
COIL, FIXED:
3.
2UH
S0009 108-0184-00
108-0184-00
COIL,FIXED:
3 .2UH
80009 108-0184-00
108-0184-00
COIL, FIXED:
3 .2UH
80009 108-0184-00
151-0254-00
TRANSISTOR
: SILICON
, NPN
03508
2N5308
151-0271-00
TRANSISTOR:SILICON,PNP
01295
SRA4504
151-0271-00
TRANSISTOR:
SILICON, PNP
01295
SRA4504
151-0341-00
TRANS
I
STOR
: S ILICON
, NPN
07263
2N356 5
151-0341-00
TRANSISTOR:
SILICON, NPN
07263
2N35
65
151-0341-00
TRANSISTOR:
SILICON, NPN
07263
2N3565
151-0341-00
TRANSISTOR:
SILICON, NPN
07263
2N3565
151-0341-00
TRANSISTOR
: SILICON,
NPN
07263
2N356 5
151-0341-00
TRANS
I
STOR:
SILICON,
NPN
07263
2N3565
315-0392-00
RES.,FXD,COMP:3.9K
OHM,5%,0.25W
01121
CB3925
305-0510-00
RES.,FXD,COMP:51
OHM,5%,2W
01121 HB5105
307-1020-00
ATTEN
STRIP
:2X
80009
307-1020-00
307-1023-00
ATTEN STRIP
:5X
80009
307-1023-00
307-1024-00
ATTEN
STRIP
:10X
80009
307-1024-00
321-0223-00
RES
.
,FXD
,FILM:
2 . 05K OHM,
1%
, 0
.
125W
75042
CEAT0-2051F
321-0299-00
RES.
,FXD,FILM:12.7K
OHM,
1%
, 0 . 125W
75042
CEAT0-1272F
315-0154-00
RES
.
,FXD,COMP
: 150K OHM,
5%
,
0
. 25W
01121
CB1545
315-0753-00
RES.
,FXD, COMP:
75K OHM,5%,0.25W
01121
CB7535
315-0753-00
RES.,FXD,COMP:75K
OHM,5%,0.25W
01121
CB7535
315-0154-00
RES.,FXD,COMP:150K
OHM,5%,0.25W
01121
CB1545
321-0344-00
RES.
,FXD,FILM:37.4K
OHM
,
1%
, 0 . 125W
75042
CEAT0-3742F
315-0154-00
RES.,FXD,COMP:150K
OHM,5%,0.25W
01121
CB1545
315-0753-00
RES.,
FXD, COMP
:75K OHM,5%,0.25W
01121 CB7535
315-0753-00
RES. ,FXD,COMP:75K
OHM,5%,0.25W
01121
CB7535
315-0513-00
RES
.
,FXD,COMP:5lK
OHM,5%,0.25W
01121
CB5135
321-0344-00
RES. ,
FXD, FILM
:37.4k OHM
,
1%
, 0 .
125W
75042 CEAT0-3742F
315-0154-00
RES.
, FXD, COMP:
150K OHM,5%,0.25W
01121 CB1545
315-0154-00
RES.
,
FXD, COMP:
150K
OHM,5%,0.25W
01121
CB1545
315-0133-00
RES.
,FXD,COMP:13K
OHM,5%,0.25W
01121
CB1335
315-0154-00
RES.
,FXD,COMP:150K
OHM,5%,0.25W
01121
CB1545
323-0099-00
RES
.
,FXD,FILM:105
OHM,1%,0.50W
75042 CECT0-1050F
323-0099-00
RES. ,
FXD, FILM: 105 OHM,1%,0.50W
75042 CECT0-1050F
315-0111-00
RES.,
FXD, COMP:
110
OHM,5%,0.25W
01121
CB1115
6-4
0
Electrical
Parts
List-7A24
Tektronix
Serial/Model
No.
Mfr
Ckt
No.
Part No.
Eff
Dscont
Name &
Description
Code
Mfr Part Number
R811 315-0111-00
RES. ,FXD,COMP:110
OHM,5%,0.25W
01121
CB1115
R850
315-0100-00
RES, ,FXD,COMP:10
OHM,5%,0.25W
01121
CB1005
R854
315-0100-00
RES,
,FXD,COMP:10
OHM,5%,0.25K
01121
CB1005
R860 315-0100-00
RES.
,FXD,COMP:10
OHM,5%,0.25W
01121
CB1005
R864 315-0100-00
RES.
,FXD,COMP:10
OHM,5%,0.25W
01121
CB1005
R866 315-0241-00
RES.
,FXD,COMP :240 OHM,5%,0.25W
01121
CB2415
R890
301-0471-00
RES.
,FXD,COMP:470
OHM,
5%,
0. SOW
01121 EB4715
R892 301-0471-00
RES.
,FXD,COMP:470
OHM,
5%,
0. SOW
01121
EB4715
R894
311-1262-00
RES. , VAR
, NONWIR : 7 5
0
OHM
, 10
%
, 0 . 5 OW
73138
62PT-3620-751K
R896 311-1260-00
RES. ,VAR,NONWIR;
250 OHM
,
10%
, 0
.
SOW
73138
62PT-345G-251K
R902 315-0111-00
RES.
,FXD,COMP:110
OHM,5%,0.25W
01121
CB1115
R904
315-0111-00
RES
.
,FXD, COMP:
110
OHM,5%,0.25W
01121
CB1115
R906 323-0094-00
RES
. ,FXD,FILM:93.1
OKM,1%,0.50W
19701
MF7CD93R10F
R908 323-0094-00
RES. ,FXD,FILM:93.1
OHM,1%,0.50W
19701
MF7CD93R10F
R912 315-0390-00
RES. ,FXD,COMP:39
OHM,5%,0.25W
01121
CB3905
R914 315-0390-00
RES
. ,FXD,COMP:39
OHM,5%,0.25W
01121
CB3905
R916 321-0167-00
RES. ,FXD,FILM:536
OHM,
1%
, 0
.
125W
75042
CEATO-5360F
R918 321-0195-00
RES
.
,FXD,F1LM:1.05K
OHM
,1%, 0
.
12
5W
75042
CEATO-1051F
R920 315-0221-00
RES
.
,FXD,COMP:220
OHM,5%,0.25W
01121
CB2215
R940 315-0221-00
RES.
,FXD,COMP:220
OHM,5%,0.25W
01121
CB2215
R946
311-1260-00
RES
.
, VAR
,
NONVJI
R:250 OHM,
10%,
0.
SOW
73138
62PT-3450-251K
R990 323-0193-00
RES.
,FXD,FILM:1K OHM,1%,0.5W
75042
CECTO-IOOIF
R992
323-0193-00
RES. ,FXD,FILM:1K
OHM,1%,0.5W
75042
CECTO-IOOIF
RIOIO
315-0470-00
RES. ,FXD,C0MP:47
OHM,
5%
,
0 .
25Vt
01121
CB4705
R1012 315-0470-00
RES.
,FXD,C0HP:47
OHM,5%,0.25W
01121
CB4705
R1050 315-0103-00
RES
.
,FXD,COMP:10K
OHM,5%,0.25W
01121
CB1035
R1052
315-0101-00
RES.
,FXD,COMP:100
OHM,5%,0.25W
01121
CB1015
R1060 315-0272-00
RES. ,FXD,COMP:2
.7K OHM,5%,0.25W
01121
CB2725
R1062
315-0103-00
RES
. ,FXD,COMP:10K
OHM,5%,0.25W
01121
CB1035
R1063 315-0751-00
RES. ,FXD,COMP:750
OF>l
,
5%
,
0 . 25W
01121
CB7515
R1065 315-0241-00
RES.
,FXD,COMP:240
OKM,5%,0.25W
01121
CB2415
R1070 315-0302-00
RES.
,FXD,COMP:3K
OHM,5%,0.25W
01121
CB3025
R1072 315-0623-00
RES.
,FXD,COMP:62K
OHM,5%,0.25W
01121
CB6235
R1081
315-0241-00
RES.
,FXD,COMP:240
OHM,5%,0.25W
01121
CB2415
R1083
315-0621-00
RES.
,FXD,COMP:620
OHM,5%,0.25W
01121 CB6215
R1085 315-0392-00
RES . ,FXD,COMP:3.9K
OHM,5%,0.25W
01121
CB3925
R1301 323-0073-00
RES
.
,FXD,FILM:56
.2
OHM,1%,0.50W
91637
MFF1226G56R20F
R1303 315-0123-00
RES. ,FXD,COMP:12K
OHM,5%,0.25W
01121
CB1235
R1305 311-1268-00
RES
. ,VAR,NOtJWIR:
lOK OHM
,
10%
,
0
. 5
OW
73138
62PT-351-0-103K
R1307 311-1263-00
RES.
,VAR,N0N1>JIR;1K
OHM
,
10
%
,
O .
SOW
73138
62PT-347-0-102K
R1311
315-0512-00
RES .
,FXD,COMP:5.1K
OHM,
5%
,
O . 25V;
01121
CB5125
R1313 315-0512-00
RES.
,FXD,C0MP:5.1K
QHM,5%,0.25W
01121
CB5125
R1315
315-0392-00
RES
.
,FXD,COMP:3.9K
OHM,5%,0.25W
01121
CB3925
R1317 311-1265-00
RES. ,VAR,NONl'IIR;
2K OHM,
10%
,
0 .SOW
80294
3326P-L58-202
R1319
315-0472-00
RES. ,FXD,COMP:4
,7K OHM
,
5%
,
0 . 25V?
01121
CB4725
R1320
323-0176-00
RES
.
,FXD,
FILM: 665
OHM,1%,0.50W
75042
CECT0-6650F
R1323
323-0176-00
RES. ,FXD,FILM:665
OFJM
,
1%
,
0
.
SOW
75042
CECT0-6650F
R1324
311-1259-00
RES.
,
VAR
,
NOm^IR : 1
0 0
OHM
,
1
0
%
,
0 . 5 0 W
80294
3326P-L58-101
R1327
315-0822-00
RES
.
,FXD,COMP:8
,2K OHM,5%,0.25W
01121
CB8225
R1329
315-0822-00
RES
.
,FXD,COMP:8.2K
OHM,5%,0.25W
01121
CB8225
R1332 315-0432-00
RES
.
,FXD,COMP:4
,3K OHM,5%,0.25W
01121 CB4325
R1334 315-0471-00
RES. ,FXD,COMP:470
OHM,5%,0.25W
01121
CB4715
R1336 311-1260-00
RES.
,
VAR, NONWIR:
2 50 OHM
,
10
%
,
0
. 5
OV?
73138
62PT-3450-251K
R1337
311-1261-00
RES. ,VAR,NONWIR:500
OHM,
10%
,
0 . 5 0V\’
80294
3326P-L58-501
R1338
315-0470-00
RES.
,FXD,COMP:47
OHM,
5%
, 0
. 25W
01121
CB4705
R1339 315-0470-00
RES
. ,FXD,COMP:47
OHM,5%,0.25W
01121
CB4705
R1340
315-0181-00
RES
. ,FXD,COMP:180
OHM,
5%
, 0 . 25K
01121
CB1815
R1341
321-0076-00
RES
.
,FXD,FILM:60.4
OHM,
1%
, 0 . 125W
75042
CEAT0-60R40F
R1343 321-0076-00
RES. ,FXD,FILM:60.4
OHM,
1%
, 0
.
125W
75042
CEAT0-60R40F
R1347
323-0140-00
RES.
,FXD,FILM:280
OHM,1%,0.50W
75042
CECT0-2800F
Electrical
Parts List—
7A24
Ckt No,
Tektronix
Part No.
Serial/Model
No.
Eff Dscont
Name &
Description
Mfr
Code Mfr
Part Number
R1351
315-0472-00
RES.,FXD,COMP:4.7K OHM,5%,0.25W
01121 CB4725
R1353
311-1268-00
RES
.
, VAR , NONWIR
: 1 0 K
OHM
, 1 0
%
, 0 . 5 OW 73138 62PT-351-0-103K
R14
01
321-0076-00
RES
.
,FXD,FILM:60.4
OHM,
1%
, 0
.
125W
75042 CEAT0-60R40F
R14 0
3
321-0076-00
P.ES.,FXD,FILM:60.4
OHM
,
1%
,
0
.
125W
75042 CEAT0-60R40F
R1413
315-0332-00
RES.
,FXD,COMP:3.3K OHM,5%,0.25W
01121
CB3325
R1416
315-0470-00
RES. ,FXD,COMP:47 OHM,5%,0.25W
01121 CB4705
R1418
315-0152-00
RES. ,FXD,COMP:1.5K OHM,5%,0.25W
01121 CB1525
R1419
315-0511-00
RES.
,FXD,COMP:510 OHM,5%,0.25W
01121 CB5115
R142 0
323-0190-00
RES
.
, FXD , FILM
: 9 31
OHM
,
1%
, 0 .
50K
75042 CECT0-9310F
R1421
315-0202-00
RES
.
,FXD,
COMP
:2K
OHM,5%,0.25W
01121 CB2025
R1422
323-0190-00
RES. ,FXD,FILM:931
OHM,1%,0.50W 75042 CECTO-9310F
R1423A,B-^3.11-1465-01
RES.,VAR,NON!-JIR:lK OHM
X 2.5K
OHM,
10%
,
0 .
SOW
80009
311-1465-01
R1425
315-0512-00
RES., FXD, COMP;
5. IK
OHM,5%,0.25W
01121 CB5125
R1432
315-0911-00
RES.
, FXD,COMP: 9 10 OHM,5%,0.25W 01121 CB9115
R14 34
315-0101-00
RES
.
,
FXD
,
COMP : 1 0 0 OHM ,
5
%
,0. 2
5W
01121 CB1015
R14
3
5
311-1260-00
RES. ,VAR,NOM4IR:250 OHM ,
10%
, 0
. SOW 73138
62PT-345Q-251K
R1436
311-1269-00
RES. ,VAR,KOtn4IR:20K OHM,
10%
,
0 . 5
OW 73138
62PT-3520-203K
R1438
315-0470-00
RES
.
,FXD,COMP:47
OHM,5%,0.25W 01121
CB4705
R1439
315-0470-00
RES. ,FXD,COMP:47 OHM,5%,0.25W 01121 CB4705
R14 4 5
311-1260-00
RES. ,VAR,NOOT4IR;250 OHM
,
10%
, 0 .
SOW 73138 62PT-3450-251K
R146s2
311-1320-00
RES ., VAR, NONWIR : 5K
OHM,10%,1W 12697 381-CM39700
R1466
315-0273-00
RES.,FXD,COMP:27K OHM,5%,0.25W 01121 CB2735
R1467
315-0273-00
RES. , FXD, COMP; 27K
OHM,5%,0.25W 01121
CB2735
R1470
315-0511-00
RES.
, FXD,
COMP;
510
OHM,5%,0.25W 01121 CB5115
R1472
315-0183-00
RES ., FXD, COMP
: 18K
OHM,5%,0.25W 01121 CB1835
R1474
315-0331-00
RES
.
,
FXD ,
COMP
: 3 3 0
OHM,
5
%
, 0 .
25W 01121 CB3315
R14
9 0
315-0561-00 RES. ,
FXD,
COMP:
560
OHM,5%,0.25W 01121 CB5615
R1492
315-0183-00
RES. ,FXD,COMP:18K OHM,5%,0.25W
01121
CB1835
R1494
315-0331-00
RES ., FXD, COMP: 330
OHM,
5%
,
0. 25K 01121 CB3315
R1498
315-0471-00 RES ., FXD, COMP :470 OHM,5%,0.25W 01121 CB4715
R1501
321-0076-00 RES., FXD, FILM:
6
0.4 OHM,
1%
, 0 .
125W
75042
CEAT0-60P.40F
R1503
321-0076-00 RES., FXD, FILM: 60.
4
OHM,
1%
, 0 . 125W
75042 CEATO-60R40F
R1505
323-0112-00
RES.
,FXD,FILM:143 OHM,1%,0.50W
75042 CECT0-1430F
R1511
315-0202-00
RES ., FXD,
COMP:
2K
OHM,5%,0.25W
01121 CB2025
R1512
315-0202-00
RES. ,FXD,COMP;2K
OHM,5%,0.25W 01121 CB2025
R1514
315-0152-00
RES
.
, FXD ,
COMP
; 1 . 5 K
OHM ,
5%
, 0 . 25W
01121 CB1525
R1516
315-0202-00
RES. , FXD,
COMP:
2K
OHM,5%,0.25W
01121
CB2025
R1517
315-0202-00 RES
.,
FXD,
COMP
:2K
OHM,5%,0.25W
01121 CB2025
R1519
315-0152-00 RES.,FXD,COMP:1.5K OHM,5%,0.25W
01121 CB1525
R1520
323-0206-00
RES.
,FXD,FILM:1.37K OHM,1%,0.50W
75042 CECT0-1371F
R1523
323-0206-00
RES. ,FXD,FILM:1.37K
OHM,1%,0.50W
75042 CECT0-1371F
R1525
315-0101-00
RES. , FXD,
COMP:
100
OHM,5%,0.25W
01121 CB1015
R1527
315-0101-00 RES
.
,
FXD
,
COMP : 100
OHM.
,
5%
,
0 . 25W
01121
CB1015
R1711
315-0202-00 RES .,
FXD,
COMP
:2K
OHM,5%,0.25W
01121 CB2025
R1712
315-0202-00 RES.,FXD,
COMP
:2K
OHM,5%,0.25W
01121 CB2025
R1714
315-0152-00 RES. , FXD,COMP: 1.5K
OHM,5%,0.25W
01121 CB1525
R1716
315-0202-00 RES., FXD,
COMP
:2K
OHM,5%,0.25W
01121 CB2025
R1717
315-0202-00 RES.
,FXD,COMP:2K OHM,5%,0.25W
01121
CB2025
R17.19
315-0152-00 RES.,FXD,COMP:1.5K
OHM,5%,0.25W
01121 CB1525
R1720
323-0206-00
RES. ,
FXD, FILM: 1.37K
OHM,1%,0.50W
75042
CECT0-1371F
R1721
311-1259-00
RES. ,
VAR, NONWIR: 100
OHM,
10%
,
0
. SOW
80294
3326P-L58-101
R1723
323-0206-00 RES.,FXD,Fm4:1.37K
OHM,1%,0.50W
75042
CECT0-1371F
R2301
323-0073-00 RES
.
, FXD ,
FILM
: 56 . 2
OHM,
1%
, 0 .
SOW
91637
MFF1226G56R20F
R2303
315-0123-00 RES. , FXD,
COMP: 12K
OHM,5%,0.25W
01121 CB1235
R2305
311-1268-00 RES.
,VAR,NOm«R:10K
OHM
,
10%
,
0 .
SOW
73138
62PT-351-0-103!
R2307
311-1263-00 RES
.
,
VAR
,
NOW4IR :
IK
OHM
,
10
%
,
0 . 5 0
W
73138
62PT-347-0-102]
R2311
315-0512-00 RES
.
,FXD,COMP :5 . IK
OHM,5%,0.25W
01121 CB5125
R2313
315-0512-00 RES. , FXD,
COMP:
5. IK
OHM,5%,0.25W
01121 CB5125
R2
315
315-0392-00 RES.
,FXD,COMP;3.9K
OHM,5%,0.25W
01121 CB3925
R2317
311-1265-00 RES
.
,VAR,NOOT'IIR:2K OHM,
10%
,
0
.SOW
80294 3326P-L58-202
^Furnished as
a unit
with S1423A,B.
^Furnished as
a unit
with S1465.
6-6
0
Electrical Parts List— 7A24
Ckt No.
Tektronix
Part No.
Serial /Model No.
Eff
Dsconf
Name &
Description
Mfr
Code Mfr Part Number
R2319
315-0472-00
RES. ,FXD,COMP:4
.7K
OHM,5%,0.25K
01121
CB4725
R2320
323-0176-00
RES.
,FXD,FILM:665
OHM,1%,0.50W
75042
CECTO-6650F
R2323
323-0176-00
RES
. ,FXD,FILM:665 OHM,1%,0.50W
75042
CECT0-6650F
R2324
311-1259-00
RES
.
, VAR , NOimiR
:100 OHM,10%,0.50V7
80294 3326P-L58-101
R2327
315-0822-00
RES
. ,FXD,COMP:8.2K OHM,5%,0.25W
01121
CB8225
R2329
315-0822-00
RES
.
,FXD,COMP:8.2K
OHM,5%,0.25W
01121 CB8225
R2332
315-0432-00
RES
. ,FXD,COMP:4
. 3K
OHM,5%,0.25K
01121
CB4325
R2334
315-0471-00
RES
.
,FXD,COMP:470
OHM,5%,0.25K
01121 CB4715
R2
3 36
311-1260-00
RES
.
,
VAR
,
NONX4IR : 2
5 0
OHM
,
1 0
% ,
0 .
5
OK
73138
62PT-3450-251K
R2337
311-1261-00
RES
. ,
VAR
, NOMWIR
; 5 0 0
OHM
, 1 0
%
,
0.5
OK
80294 3326P-L58-501
R2338 315-0470-00
RES
.
,FXD,COMP:47
OHM,5%,0.25K
01121 CB4705
R2339 315-0470-00
RES
.
,FXD,COMP:47
OHM,5%,0.25K
01121
CB4705
R2340
315-0181-00
RES
.
, FXD, COMP :
180 OHK,
5%
,
0
.
25V!
01121 CB1815
R2341
321-0076-00
RES. ,FXD
, FILM : 60 .
4 OHM ,
1%
, 0
.
125W
75042
CEAT0-60R40F
R234
3
321-0076-00
RES.
,FXD,FILM:60.
4 OHM,
1%
, 0.
125K
75042
CEAT0-60R40F
R2347 323-0140-00
RES
.
,FXD,FILM:280
OHM,1%,0.50K'
75042
CECTO-2800F
R2351
315-0472-00
RES
.
,FXD,COMP:4
.7K
OHM,5%,0.25K
01121
CB4725
R2353
311-1268-00
RES
.
, VAR
,
NONWIR
: lOK OHM ,
10
%
, 0 . 5
OK
73138
62PT-351-0-103K
R2401
321-0076-00
RES
.
,
FXD
,
FILM : 60 . 4 OHM
, 1%, 0 . 12 5K
75042
CEATO-60R40F
R2403
321-0076-00
RES
.
, FXD, FILM
: 60 . 4 OHM ,
1%
,
0 .
125W
75042
CEAT0-60R40F
R2410
315-0162-00
RES
.
,
FXD ,
COMP
: 1 .
6K OHM
,5%, 0 . 2
5K
01121
CB1625
R2411
311-1263-00
RES
.
,
VAR
,
NONV7IR :
IK OHM
,
10
%
,
0 . 5
OK
73138
62PT-347-0-102K
R2413
315-0470-00
RES
.
,FXD,COMP:47
OKM,5%,0.25W
01121
CB4705
R2415
315-0102-00
RES. , FXD, COMP
:1K. OHM,
5%
,
0 .
257.'
01121
CB1025
R2416
315-0470-00
RES
.
,FXD,COMP:47
OHM,5%,0.25W
01121
CB4705
R2418
315-0152-00
RES
.
, FXD, COMP
:1.5K OHM,5%,0.25K
01121
CB1525
R2419 315-0511-00
RES
.
,
FXD,
COMP
: 510 OHM,5%,0.25W
01121 CB5115
R2420
323-0190-00
RES . , FXD, FILM:
931
OHM
,
1%
,
0 .
5077
75042 CECT0-9310F
R2421
315-0202-00
RES,
,FXD,COMP:2K OHM
,
5%
,
0 . 257;
01121 CB2025
R2422
323-0190-00
RES. , FXD, FILM:
931 OHM,1%,0.50W
75042
CECT0-9310F
R2423A,
.B^311-1465-01
RES . ,VAR,KONKIR:lK
OHM X
2.5K OHM
,
10%
,
0 . 5
077
80009
311-1465-01
R2425
315-0512-00
RES . ,FXD,COMP :
5 . IK
OHK
,5%,
0 .
2577
01121
CB5125
R2432
315-0911-00
RES
.
,
FXD
,
COMP : 9
1 0
OHM
,
5
%
,
0 .
2
5K
01121 CB9115
R24
34
315-0101-00
RES. , FXD, COMP :
100 OH.M
,
5
%
,
0 .
257'
01121
CB1015
R2435 311-1260-00
RES.
,
VAR
,
NON77IR
:
2 5 0 OHM
,
10%
,
0 .
SOW
73138
62PT-3450-251K
R2436
311-1269-00
RES
. ,VAR,r70N7\’IR:
20K
OHM,
10%
,
0 .
5077
73138
62PT-3520-203K
R2438
315-0470-00
RES, ,FXD,COMP:47
OHM,
5%
,
0 . 257?
01121 CB4705
R2439
315-0470-00
RES
.
,
F XD
,
COMP : 4 7 OHM
,
5
%
,
0.2
577
01121
CB4705
R2445
311-1260-00
RES.
,
VAR
,
NON7V IR :
2 5 0 OHM
,
1 0
%
,
0 . 5 OK
73138
62PT-3450-251K
R24652
311-1320-00
RES. ,VAR,N07A'7IR:5K
OHM,
10%
,
177
12697
381-CM39700
R2466
315-0273-00
RES. ,
FXD, COMP
:27K
OHM,5%,0.25W
01121
CB2735
R2467
315-0273-00
FES
.
,FXD,COMP:27K
OHM,5%,0.25K
01121
CB2735
R2470
315-0511-00
RES
.
,
FXD,COMP : 5
1 0
OHM
,
5
%
,
0 . 2 577
01121
CB5115
R2472
315-0183-00
RES
. ,FXD,COMP:18K OHM, 5
%
,
0 . 2 577
01121
CB1835
R2474
315-0331-00
RES. ,FXD,COMP:330
OHM,
5%
,
0 . 2577
01121
CB3315
R2476 315-0202-00
RES. ,FXD,COMP:2K
OHM,5%,0.25K
01121
CB2025
R2490
315-0561-00
RES.
,FXD,COMP:560 OHM,
5%
,
0
. 2577
01121
CB5615
R2492
315-0183-00
RES . ,FXD,COMP:18K OHM,
5%
,
0 . 2577
01121
CB1835
R24 94
315-0331-00
RES. ,FXD,COMP:330
OHM,
5%
,
0
. 2577
01121 CB3315
R2496
315-0202-00
RES
.
,FXD,COMP:2K
OHM
,5%,
0 . 2577
01121
CB2025
R2498 315-0911-00
RES, ,FXD,COMP:910
OHM,5%,0.25W
01121
CB9115
R2501
321-0076-00
RES
.
,
FXD, FILM:
6 0.4 OHM,
1%
,
0 .
1257?
75042
CEAT0-60R40F
R2503
321-0076-00
RES.
,FXD,FILM:60.4 OHM
,
1%
,
0 .
12577
75042
CEAT0-60R40F
R2505
323-0112-00
RES . ,FXD,FILM:143 OHM
,
1%
,
0
. 5
07?
75042 CECT0-1430F
R2511
315-0202-00
RES.
,FXD,COMP:2K OHM,5%,0.25W
01121
CB2025
R2512
315-0202-00
RES
.
,FXD,COMP:2K OHM
,
5
% ,
0 . 2
577
01121
CB2025
R2514
315-0152-00
RES. ,
FXD,
COMP
:1.5K OHM,
5%
,
0 . 2577
01121
CB1525
R2516
315-0202-00
RES . , FXD,COMP
:2K
OHM,
5%
,
0 . 257?
01121
CB2025
R2517
315-0202-00
RES. ,FXD,COMP:2K
OHM,
5%
,
0 .
257;
01121 CB2025
R2519
315-0152-00
RES
.
,FXD,CO.MP:1.5K
OHM
,
5
%
,
0 . 2 57?
01121
CB1525
^Furnished as a
unit with S2423A,B.
^Furnished as a unit with S2465.
6-7
Electrical Parts List—
7A24
Ckt
No.
Tektronix
Part
No.
Seria
Eff
/Model No.
Dscont
Name &
Description
Mfr
Code Mfr Part Numbe
R2520 323-0206-00
RES. ,FXD, FILM:
1.37K OHM,1%,0.50W
75042 CECT0-1371F
R2523
323-0206-00
RES.
,FXD,FILM:1.37K OHM,1%,0.50W
75042
CECT0-1371F
R2525 315-0101-00
RES.
,FXD,CO.MP:100 OHM,5%,0.25K
01121 CB1015
R2527
315-0101-00
RES.
,FXD,COMP:100 OHM,5%,0.25W
01121 CB1015
R2711
315-0202-00
RES. ,FXD,COMP:2K
OHM,5%,0.25W
01121
CB2025
R2712
315-0202-00
RES.
,FXD, COMP:
2K
OHM,5%,0.25W
01121 CB2025
R2714 315-0152-00
RES. ,FXD,COMP:1.5K
OHM,5%,0.25W
01121
CB1525
R2716
315-0202-00
RES. ,FXD, COMP:
2K OHM,5%,0.25W
01121 CB2025
R2717 315-0202-00
RES.
,FXD,
COMP:
2K OHM,5%,0.25W
01121 CB2025
R2719
315-0152-00
RES.
,FXD,COMP:1.5K OHM,5%,0.25K
01121
CB1525
R2720 323-0206-00
RES.
,FXD,FILM:1.37K OHM,1%,0.50K
75042
CECT0-1371F
R2721
311-1259-00
RES. ,VAR,NONWIR:100
OHM,
10%
,
0
. SOW
80294 3326P-L58-101
R2723
323-0206-00
RES. ,FXD,FILM:1.37K
OHM,1%,0.50W
75042 CECT0-1371F
RT1437 307-0127-00
RES
.
,
THERMAL
: IK OHM ,10%
14193
2D13-102K
RT2437
307-0127-00
RES.
,
THERMAL:
IK
OHM,
10%
14193 2D13-102K
S22A,
B
260-0816-00
SWITCH, SLIDE :CH 2 POLARITY
79727 G-126MOD6914
S30A1
260-1493-00
SWITCH, ROTARY: DISPLAY
MODE 76854
5-43681-411
S30BI
: TRIGGER
SOURCE
S30A1
262-0965-00
SWITCH ASSY, ROT: DISPLAY
MODE
80009
262-0965-00
S30b1
: TRIGGER
SOURCE
SlOOAj
: COUPLING
SIOOB
1
263-1021-00
ACTR ASSY, CAM S: VOLTS/D IV
80009
263-1021-00
sioocl
:VOLTS/DIV
S1423A,
CHI CAL IN
S14653
CHI IDENTIFY
S2423A,
s'*
CH2 CAL IN
32465=
CH2
IDENTIFY
T1301
119-0418-00
CPLR,XMSN
LINE:BALUN
80009
119-0418-00
T1527
276-0557-00
CORE, TOROID:
78488
57-0131
T2301
119-0418-00
CPLR,XMSN
LINE:BALUN
80009
119-0418-00
T2527
276-0557-00
CORE, TOROID:
78488
57-0131
U1350
155-0078-03
INTEGRATED
CKT :ML, VERTICAL AMPL , SEL
80009
155-0078-03
U1450
155-0078-03
INTEGRATED CKT:ML, VERTICAL AMPL,
SEL 80009
155-0078-03
U1550
155-0078-01
INTEGRATED CKT:
ML,VERTICAL
AMPL,
SEL 80009
155-0078-01
U1750
155-0078-01
INTEGRATED CKT:
ML,
VERTICAL AMPL,
SEL 80009
155-0078-01
U2350
155-0078-03
INTEGRATED CKT:ML, VERTICAL AMPL,
SEL 80009
155-0078-03
U2450
155-0078-00
INTEGRATED CKT: ML, VERTICAL AMPL
80009
155-0078-00
U2550
155-0078-01
INTEGRATED CKT:ML, VERTICAL AMPL, SEL 80009
155-0078-01
U2750
155-0078-01
INTEGRATED CKT: ML, VERTICAL AMPL, SEL 80009
155-0078-01
VR8
50
152-0481-00
SEMICOND DEVICE: ZENER,
IW, 5. IV, 5%
81483
1N3826A
VR8
54
152-0481-00
SEMICOND DEVICE : ZENER
,
IW,
5 .
IV,
5%
81483 1N3826A
VR8 60
152-0481-00
SEMICOND
DEVICE
:
ZENER
, IW, 5 .
IV
, 5
%
814
8 3
1N3826A
VR8
64
152-0481-00
SEMICOND DEVICE:ZENER,1W,5.1V,5% 81483 1N3826A
VR1301
152-0226-00
SEMICOND DEVICE
:
ZENER, 0
.
4W, 5 .
IV
, 5%
81483
69-6584
VR1303
152-0226-00
SEMICOND DEVICE : ZENER,
0
. 4W,
5 .
IV, 5% 81483
69-6584
VR2301
152-0226-00
SEMICOND DEVICE : ZENER
,
0
.
4W,
5 .
IV ,
5%
81483
69-6584
VR2303
152-0226-00
SEMICOND DEVICE : ZENER,
0
. 4W,
5
.
IV
,
5%
81483
69-6584
^See Mechanical
^Furnished as a ^Furnished as a
^Furnished as a
^Furnished as a
Parts List for replacement
unit with R1423A,B.
unit with
R1465.
unit with
R2423A,B.
unit with
R2465.
parts
.
0
6-8
7A24
DIAGRAMS
AND
CIRCUIT BOARD
ILLUSTRATIONS
Symbols and Reference
Designators
Electrical components
shown on the diagrams are in
the following
units
unless noted otherwise;
Capacitors
=
Values one or greater are in picofarads (pF). Values less than one are in microfarads (pF).
Resistors
=
Ohms {SI).
Symbols used on
the diagrams are based on USA Standard
Y32
.2-1967.
Logic
symbology
is
based on MIL-STD-806B in
terms of positive logic. Logic symbols depict the logic function performed
and may
differ from the manufacturer's data.
The following
prefix
letters
are used
as
reference
designators
to
identify components or assemblies on the diagrams.
A
Assembly, separable or
repairable
H Heat dissipating device (heat sink.
RT
Thermistor
(circuit board, etc.)
heat radiator,
etc.)
S
Switch
AT Attenuator,
fixed
or
variable HR Heater
T
Transformer
B
Motor
HY Hybrid circuit TC Thermocouple
BT
Battery
J
Connector, stationary portion
TP
Test point
C Capacitor,
fixed
or
variable
K Relay U
Assembly, inseparable or non-repairable
CB Circuit
breaker L
Inductor, fixed or varis^le (integrated circuit, etc.)
CB
Diode, signal or
rectifier LR
Inductor/resistor combination
V
Electron tube
DL Delay
line
M Meter
VR Voltage regulator (zener diode, etc.)
DS
Indicating device (lamp)
P
Connector, movable
portion
Y
Crystal
E
Spark
Gap
Q Transistor or
silicon-controlled
Z Phase shifter
F Fuse
rectifier
FL
Filter
R
Resistor, fixed or
variable
SECTION
7
DIAGRAMS
GH
E
READOUT
^
«.73
Zi-Jf
BLOCK
DIAGRAM
A1
and
A3
ATTENUATOR
BOARD
7A24
Fig.
7-3.
A1
and A3—
Attenuator circuit board.
CKT
NO
GRID
LOG
CKT
NO
GRID
LOG
FIDO
5B
R100 5B
R101
5B
R106 2B
J100
6B
R110 3B
J175
1 A
R119
4B
4-
7A24
fcHn
(INPUT)
son
CH!
SIGNAL
TO CHI
AMPL^
DIAG
^
fcjTIl
(INPUT)
son.
©
CH
U CH
2
ATTENUATORS
<i>
CH
1
and
CH
2
ATTENUATORS
A5
AMPLIFIER
BOARD
7A24
Fig.
7-4.
A5-Amplifier
circuit
board.
COMPONENT
LOCATION
INDEX
CKT
NO
GRID
LOC
CKT
NO
GRID
LOC
CKT
NO
GRID
LOC
CKT
NO
GRID
LOC
C866 C920
C940
ID
2B
2C
0920
0940
01050
2B
2C 3E
R1323
7B
R1324
7
A
R1327
7C
R1712
R1714
R1716
3B
3B
4B
C1012
3D
01070
3E
C1014
2D
01470
4B
C1018
3D
01490
4B
Cl
022
3D
02470
4E
Cl
024
2D
02490
4E
Cl
028
3D
Cl
327
7C
R806
4D
Cl
332
8B
R808
4D
C1334
7B
R810
4D
Cl
336
7B
R811
5D
Cl
432
6B
R850
2D
Cl
435
6B
R860
2D
Cl
436
7B
R864
ID
Cl
445
6C
R866
2D
C1721
3B
R890
2E
C2213
6E
R892
2E
C2327
7E
R894
2E
C2332
8D
R896
2E
C2334
7D
R902
3B
C2336
7D
C2413
5E
R904
3C
C2432
6D
R906
4C
C2435
6D
R908
4C
C2436
6D
R912
3B
C2445
6E
R914
3C
C2721
3C
R916
2C
R918
2C
CR1060
3D
R920
2C
CR1062
3D
R940
2C
CR1319
7C
CR1465
SB
R946
2C
CR1541
5C
R990
2B
CR1543
5C
R992
2B
CR2319
7E
R1010
2C
CR2476
4E
R1012
2C
CR2465
3E
R1050
4D
CR2496
4E
R1052
4D
CR2541
5D
R1060
3D
CR2543
5D
R1062
2E
R1063
3D
5D
R1065
3D
J840
4D
R1070
3D
2D
R1072
3D
J860
2D
R1301
8C
J1301
8B
R1303
8C
R1305
8C
J2301
8E
LI
445
SB
R1307
8B
L2445
5E
R1311
7C
R1313
7C
LR101C
3D
R1315
7C
LR1014
3D
R1317
8C
LR1020
3D
R1319
7C
LR1024
3D
R1320
7B
R1329
7B
R1717
4B
R1332
8B
R1719
4B
R1334
7B
R1720
2B
R1336
7B
R1721
3B
R1337
7B
R1723
2B
R1338
7B
R2301
8E
R1339
8B
R2303
8E
R1340
7C
R2305
8E
R1341
7C
R2307
8D
R1343
7B
R2311
7E
R1347
7B
R2313
7E
R1351
7C
R2315
7E
R1353
6C
R2317
7E
R1401
6B
R2319
7E
R1403
6C
R2320
7D
R1413
6C
R2323
7D
R1416
6C
R2324
6C
R1418
6C
R2327
7E
R1419
6C
R2329
7D
R1420
6B
R2332
8D
R2334
7D
R1425
6C
R2338
7D
R1432
6B
R2336
7D
R1434
6B
R2337
7D
R1435
6B
R2339
8D
R1436
6A
R2340
7E
R1438
6B
R2341
7E
R1439
6B
R2343
7E
R1445
6B
R2347
7D
R1422
6B
R2351
7E
R1466
4B
R1467
4B
R2353
6E
R1470
4B
R2401
6E
R1472
4B
R2403
6E
R1474
5B
R2410
6E
R1490
4B
R2411
6E
R1492
4B
R2413
6E
R1494
5B
R2415
6E
R1498
5B
R2416
6E
R1501
5C
R2418
6E
R1503
5C
R2419
6E
R1505
5B
R2420
6D
R1511
5C
R2422
6D
R2425
5E
t
R1512
5C
R2432 6D
R1514
5C
R2434 6D
R1516
5C
R2435
6D
R1517
6C
R1519
5C
R2436
6D
R1520
4C
R2438
6D
R1523
4C
R2439
6D
R1525
4C
R2445
6E
R2466
4E
R1527
4C
R2467
4E
R1711
4B
ONENT
DN INDEX
CKT
NO
GRID
LOC
CKT
NO
GRID LOC
R1712 3B
R2470
4E
R1714 3B
R2472
4E
R1716 4B
R2474 5E
R1717 4B
R2476
4E
R1719 4B
R2490
4E
R1720 2B
R2492
4E
R1721
3B
R2494
5E
R1723
2B
R2496
4E
R2301 8E
R2498
3E
R2303 8E
R2501
5D
R23CS
8E
R2503
5D
R2307 8D
R2505
5E
R2311
7E
R2511
4D
R2313
7E
R2512
4D
R2315
7E
R2514
4D
R2317 7E
R2516
4D
R2319
7E
R2517 4D
R2320 7D
R2519 4D
R2323
7D
R2520
5D
R2324
6C
R2523 5D
R2327
7E
R2525 5D
R2329 7D
R2527
5D
R2332
8D
R2711 3C
R2334
7D
R2712 3C
R2338
7D
R2714 3C
R2336
7D
R2716 3C
R2337
7D
R2717 3C
R2339
8D
R2719
3C
R2340
7E
R2720
3D
R2341
7E
R2721
3C
R2343
7E
R2723 3C
R2347
7D
R2854
ID
R2351
7E
R2353
6E
RT1437
6B
R2401
6E
RT2437
6D
R2403
6E
R2410
6E
U1350
7B
R2411 6E
U1450
6B
R2413
6E
U1550
5C
R2415 6E
U1750
3B
R2416
6E
U2350 7E
R2418
6E
U2450 6E
R2419
6E
U2550
5D
R2420
6D
U2750
3C
R2422
6D
R242S
5E
VR850
2E
R2432
6D
VR854
ID
VR860
2D
R2434
6D
VR864 IE
R243S
6D
R2436
6D
R2438
6D
R2439
60
R2445
6E
R2466
4E
R2467
4E
VOLTAGES AND WAVEFORMS
The voltages and waveforms
shown on this diagram were obtained by
using the
recommended test equipment and test set-ups listed
below, except
as noted.
RECOMMENDED TEST EQUIPMENT
ITEM
SPECIFICATIONS RECOMMENDED TYPE
Oscilloscope
system Deflection
factor 10
mV
to 2 V/div. Input
impedance 10
Megohms
Frequency response
dc to
25 MHz.
a.
Tektronix 7000-series oscilloscope equipped
with readout, 7B-series Time-Base, 7A15A Am-
plifier, and
a
10X probe. (7A13
Differential
Comparator used in place of 7A15A for calib-
rated offset voltages.)
Voltmeter
(Non-loading
digital multi-
meter)
Input impedance
10 Megohms Range (full
scale) 2
V
to 20 V
a.
Tektronix
7D13
Digital Multimeter (oscillo-
scope system must have
readout).
b. Fairchild Model
7050,
or equivalent.
Plug-in
extender
Capable
of
extending the 7A24 from the
oscilloscope plug-in compartment
a.
Tektronix Part No. 067-0589-00 (rigid) or
Tektronix
Part
No.
067-0616-00 (flexible).
7A24 Control
Settings
CH 1 andCH 2VOLTS/DIV CH
1
and CH 2 Input switches
CH 1 and CH
2
POSITION
DISPLAY
MODE
TRIGGER SOURCE
CH
2
POLARITY
5 mV
DC
center trace
on
graticule
CH
1
MODE
+
UP
Voltage Conditions
Voltage
measurements are
taken with no signal applied and the trace centered
on
the graticule. The voltmeter
common
is connected to
chassis ground.
The 7A24 is connected
to one
of
the vertical compartments of the oscilloscope mainframe through the plug-in extender. The
7D13, if used, is
inserted into
the
other
vertical compartment.
Waveform Conditions
The
7A24 is connected to one of the vertical compartments of
the oscilloscope mainframe through the plug-in extender. The
amplifier
plug-in, 7A15A or 7A13, is inserted into
the
other
vertical
compartment.
A 1-kilohertz, 40 millivolt (20 mV, into
50
U) signal is applied to the
CH
1 input of the 7A24. The oscilloscope Trigger
Source is set to trigger the time-base unit from the 7A24
output.
If the 7A15A Amplifier
plug-in is used, the input should be ac coupled.
Tolerances of the voltages and waveforms
shown
are
±
20%.
CH
1
AMPLIFIER
A5
AMPLIFIER
BOARD
CKT
NO
GRID
LOC
CKT
NO
GRID
LOC
CKT
NO
GRID LOC
C866 ID
0920 2B
R1323 7B
C920 2B
0940
2C
R1324 7A
C940
2C
Q1050
3E
R1327 7C
C1012 3D
01070
3E
R1329 7B
C1014 2D
Q1470 4B
R1332 8B
C1018
3D
01490 4B
R1334
7B
C1022
3D
02470 4E
R1336
7B
Cl
024 2D
02490
4E
R1337 7B
Cl028 3D
R1338 7B
Cl 327
7C
R806 4D
R1339 8B
Cl 332 8B
R808
4D
R1340
7C
Cl
334 7B
R810 4D
R1341
7C
Cl
336
7B
R811 5D
R1343
7B
Cl 432 6B
R850
2D
R1347 7B
Cl 435 6B
R860
2D
R1351 7C
Cl 436 7B
R864
ID
R1353
6C
Cl 445 6C
R866
2D
R1401
68
C1721
3B
R890
2E
R1403
6C
C2213
6E R892 2E
R1413
6C
C2327
7E
R894 2E
R1416
6C
C2332
8D
R896
?P
R1418
6C
C2334 7D
3B
R1419
6C
C2336
7D
R902
R1420
6B
C2413
5E
R904
3C
C2432
6D
R906
4C
R1425 6C
C2435 6D
R908 4C
R1432
6B
C2436 6D
R912 3B
R1434 6B
C2445 6E
R914 3C
R1435
6B
C2721 3C
R916 2C
R1436 6A
CR1060
3D
R918
2C
R1438 6B
CR1062
3D
R920 2C
R1439
6B
CR1319
7C
R940
2C
R1445 6B
CR1465
5B
R946 2C
R1422
6B
CR1541
5C
R990 2B
R1466
R1467
4B
48
CR1543 5C
R992 2B
R1470 48
CR2319
7E
R1010
2C
R1472
48
CR2476 4E
R1012
2C
R1474
5B
CR2465 3E
R1050 4D
R1490 48
CR2496
4E
R1052 4D
R1492
48
CR2541
5D
R1060
3D
R1494 5B
CR2543 5D
R1062 2E
R1498
58
R1063 3D
R1501
5C
J830 5D
R1065
3D
R1503 5C
J840 4D
R1070 3D
R1505 58
J850 2D
R1072 3D
R1511 5C
J860
2D
R1301
8C
R1512 5C
J1301 8B
R1303 8C
R1514 5C
J2301
8E
R1305
8C
R1516 5C
LI 445
5B
R1307 8B
R1517 6C
L2445
5E
R1311
7C
R1519
5C
R1313
7C
R1520 4C
LR1010
3D
R1315
7C
R1523
4C
LR1014
3D
R1317
8C
R1525 4C
LR1020
3D
R1319
7C
R1527
4C
LR1024
3D
R1320 7B
R1711 4B
CKT
NO
GRID
LOC
CKT
NO
GRID LOC
VOLTAGES AND WAVEFORMS
The voltages and waveforms shown
on
this diagram were
obtained by using the recommended test equipment and test set-ups listed
below, except as noted.
RECOMMENDED TEST EQUIPMENT
ITEM
SPECIFICATIONS RECOMMENDED TYPE
Oscilloscope
system Deflection factor
10
mV
to
2 V/div.
Input
impedance
10
Megohms Frequency
response
dc to
25 MHz.
a.
Tektronix 7000-series oscilloscope equipped
with readout, 7B-series Time-Base, 7A15A Am-
plifier, and
a
10X probe. (7A13 Differential
Comparator used in place of 7A15A for calib-
rated offset voltages.)
Voltmeter (Non-loading
digital multi-
meter)
Input impedance
10
Megohms
Range (full
scale) 2
V
to 20 V
a.
Tektronix
7D13
Digital Multimeter
(oscillo-
scope system must have readout).
b. Fairchild Model
7050,
or equivalent.
Plug-in extender
Capable of extending the 7A24 from the
oscilloscope plug-in compartment
a. Tektronix Part No.
067-0589-00
(rigid) or
Tektronix Part No.
067-0616-00
(flexible).
o
X
N)
>
m
J3
O
\y
7A24
Control Settings
CH
1 and CH 2 VOLTS/DIV
CH
1 and CH 2 Input switches
CH
1 andCH 2 POSITION
DISPLAY MODE
TRIGGER
SOURCE
CH 2 POLARITY
5 mV
DC
center trace
on graticule
CH 2
MODE
+
UP
Voltage Conditions
Voltage
measurements are
taken with no signal
applied
and the trace centered
on
the
graticule. The voltmeter common is
connected
to
chassis ground. The
7A24 is connected
to
one of the vertical compartments of
the oscilloscope mainframe through the plug-in extender. The
7D13,
if
used,
is
inserted into the other vertical compartment.
Waveform Conditions
The 7A24
is
connected
to one of the vertical compartments of the oscilloscope mainframe through
the
plug-in extender. The amplifier
plug-in, 7A15A
or 7A13, is inserted into the other vertical compartment. A 1-kilohertz, 40 millivolt
(20
mV,
into 50 n) signal is applied to the
CH 1 input of the 7A24. The
oscilloscope Trigger Source is set
to
trigger the time-base
unit
from
the 7A24 output.
If
the 7A15A Amplifier plug-in is
used, the input should be ac coupled.
Tolerances of the voltages and waveforms shown are
±
20%.
CH
2
AMPLIFIER
A5
AMPLIFIER
BOARD
7A24
Fig.
7-6.
A5-Amplifier
circuit
board.
COMPONENT
LOCATION
INDEX
®
IT
DEX
A5
®
VOLTAGES
AND
WAVEFORMS
The voltages and
waveforms shown on this
diagram
were
below, except
as
noted.
obtained by using
the
recommended
test
equipment and
test set-ups
listed
RECOMMENDED
TEST
EQUIPMENT
ITEM
SPECIFICATIONS
RECOMMENDED
TYPE
Oscilloscope
system
Deflection
factor 10
mV
to
2 V/div. Input
impedance 10
Megohms
Frequency response
dc
to 25
MHz.
a.
Tektronix
7000-series oscilloscope
equipped
with readout,
7B-series
Time-Base,
7A15A Am-
plifier, and a
10X probe.
(7A13
Differential
Comparator
used in
place
of 7A15A
for calib-
rated offset
voltages.)
Voltmeter (Non-loading digital
multi-
meter)
Input
impedance 10
Megohms Range
(full
scale) 2
V
to
20 V
a.
Tektronix 7D13
Digital
Multimeter
(oscillo-
scope system
must have
readout)
.
b.
Fairchild
Model
7050,
or
equivalent.
Ptug-in extender
Capable
of extending the 7A24
from the
oscilloscope
plug-in compartment
a.
Tektronix
Part No.
067-0589-00 (rigid) or
Tektronix Part
No.
067-0616-00
(flexible).
7A24
Control Settings
CH 1 and CH 2
VOLTS/DIV
5 mV
CH 1 and
CH 2 Input switches
DC
CH 1 and CH 2
POSITION
center trace on
graticule
DISPLAY MODE
CH 1
TRIGGER
SOURCE
MODE
CH 2
POLARITY
+
UP
Voltage Conditions
Voltage
measurements are taken with no
signal applied
and the trace
centered on the
graticule.
The voltmeter
common is
connected to
chassis ground. The 7A24 is
connected
to
one of the
vertical
compartments of the
oscilloscope
mainframe
through the plug-in
extender. The
7D13,
if
used,
is inserted into the other
vertical
compartment.
Waveform Conditions
The 7A24 is
connected to one
of the vertical
compartments
of
the
oscilloscope
mainframe
through the
plug-in
extender. The
amplifier
plug-in, 7A15A or 7A13,
is inserted into
the other
vertical compartment.
A 1-kilohertz,
40 millivolt (20
mV, into 50
n) signal is
applied to the
CH 1 input
of
the
7A24. The oscilloscope
Trigger Source is
set
to
trigger
the
time-base unit
from the 7A24
output.
If the 7A15A
Amplifier plug-in is used, the
input should
be
ac
coupled.
Tolerances
of the voltages and
waveforms shown
are
±
20%.
CHOP
DRIVE
7A24
DISPLAY SWITCHING
4 OUTPUT
<J>
DISPLAY
SWITCHING
AND
OUTPUT
A2
and
A4
READOUT
BOARD
7A24
+
©
CH I
?
CH
2
READOUT
<S>
CH
1
and
CH
2
READOUT
R946
TRIG
GAIN
R2721
TRIG
C2721
TRIG
R1721
TRIG
C1721
TRIG
R849
OUT BAL
R896
OUT
LEV
2X BAL
HE HF
POL GAIN
Fig.
7-8. Adjustment
locations.
Section
8—
7A24
MECHANICAL
REPLACEABLE PARTS LIST
PARTS
ORDERING INFORMATION
Replacement parts
are available from or through your
local Tektronix, Inc.
Field Office or representative.
Changes
to
Tektronix
instruments are
sometimes made
to accommodate
improved components as
they become
available, and to
give you the
benefit of
the latest
circuit
improvements
developed in our engineering department. It
is
therefore
important, when ordering parts, to include the
following
information
in
your order; Part number, instru-
ment type or
number, serial number, and modification
number
if
applicable.
If
a part you
have ordered has been replaced with a new
or improved part, your
local Tektronix, Inc. Field Office or
representative will contact you concerning
any change in
part number.
Change information,
if any, is located
at
the rear of this
manual,
SPECIAL
NOTES AND
SYMBOLS
XOOO Part first added
at this serial number
OOX Part removed after this serial number
FIGURE AND INDEX
NUMBERS
Items
in this section are referenced
by figure and index
numbers
to
the
illustrations.
INDENTATION SYSTEM
This mechanical parts list is indented
to indicate item
relationships. Following is an example of
the indentation
system used in the description column.
1
2
3 4 5 Name
&
Description
Assembly and/or Component
Attaching parts for Assembly and/or
Component
*
Detail Part of Assembly
and/or Component
Attaching parts for Detail Part
*
Parts of
Detail Part
Attaching parts for Parts of
Detail Part
Attaching Parts always appear in
the same indentation
as
the item it mounts, while the detail
parts
are
indented
to
the right. Indented items are part of,
and included with, the
next higher indentation.
The
separation
symbol
indicates the
end
of
attaching parts.
Attaching
parts
must be purchased
separately, unless
otherwise specified.
ITEM
NAME
In
the Parts
List, an
Item Name
is separated from
the
description
by
a
colon
(:).
Because of
space limitations,
an
Item
Name may sometimes
appear
as
incomplete.
For
further
Item Name
identification,
the
U.S.
Federal
Cataloging Handbook
H6-1 can be
utilized
where
possible.
8-1
ABBREVIATIONS
"
INCH
FLH
FLAT
HEAD FWR
POWER
#
NUMBER SIZE
FLTR
FILTER
RCFT
RECEPTACLE
ACTR
ACTUATOR
FR
FRAME
or
FRONT
RES
RESISTOR
ADPTR
ADAPTER
FSTNR
FASTENER
RDG
RIGID
ALIGN
ALIGNMENT
FT
FOOT
RLF RELIEF
AL
ALUMINUM
FXD
FIXED
RTNR
RETAINER
ASSEM
ASSEMBLED
GSKT
GASKET
SCH SOCKET
HEAD
ASSY
ASSEMBLY
HDL
HANDLE
SCOPE OSCILLOSCOPE
ATTEN
ATTENUATOR
HEX
HEXAGON
SCR
SCREW
AWG
AMERICAN
WIRE
GAGE
HEX HD
HEXAGONAL
HEAD
SE SINGLE
END
BD BOARD
HEX
SOC HEXAGONAL
SOCKET
SECT
SECTION
BRKT
BRACKET
HLCPS
HELICAL
COMPRESSION
SEMICOND
SEMICONDUCTOR
BRS BRASS
HLEXT
HELICAL
EXTENSION
SHLD SHIELD
BRZ BRONZE
HV
HIGH VOLTAGE
SHLDR SHOULDERED
BSHG
BUSHING
IC
INTEGRATED
CIRCUIT
SKT SOCKET
CAB
CABINET
ID
INSIDE
DIAMETER
SL SLIDE
CAP
CAPACITOR
IDENT
IDENTIFICATION
SLFLKG
SELF-LOCKING
CER CERAMIC
IMPLR
IMPELLER
SLVG
SLEEVING
CHAS
CHASSIS
IN
INCH
SPR SPRING
CKT
CIRCUIT
INCAND
INCANDESCENT
SQ SQUARE
COMP
COMPOSITION
INSUL
INSULATOR
SST STAINLESS STEEL
CONN
CONNECTOR
INTL
INTERNAL
STL
STEEL
COV
COVER
LPHLDR
LAMPHOLDER
sw
SWITCH
CPLG
COUPLING
MACH
MACHINE
T TUBE
CRT
CATHODE RAY
TUBE
MECH
MECHANICAL
TERM
TERMINAL
DEG
DEGREE
MTG
MOUNTING
THD THREAD
DWR
DRAWER
NIP
NIPPLE
THK
THICK
ELCTRN
ELECTRON
NON WIRE
NOT WIRE WOUND
TNSN
TENSION
ELEC
ELECTRICAL
OBD ORDER
BY DESCRIPTION
TPG
TAPPING
ELCTLT
ELECTROLYTIC
OD
OUTSIDE
DIAMETER
TRH TRUSS
HEAD
ELEM
ELEMENT
OVH
OVAL
HEAD V
VOLTAGE
EPL
ELECTRICAL PARTS
LIST PH BRZ
PHOSPHOR BRONZE
VAR VARIABLE
EQPT
EQUIPMENT
PL PLAIN
or PLATE w/
WITH
EXT EXTERNAL
PLSTC
PLASTIC
WSHR
WASHER
FIL FILLISTER
HEAD PN
PART NUMBER
XFMR TRANSFORMER
FLEX
FLEXIBLE
PNH
PAN
HEAD
XSTR TRANSISTOR
CROSS
INDEX
MFR.
CODE NUMBER
TO
MANUFACTURER
MFR.CODE
MANUFACTURER
ADDRESS
CITY,
STATE,
ZIP
08261 Spectra-Strip
Corp.
7100 Lampson Ave
.
Garden
Grove,
CA 92642
12327 Freeway
Washer and
Stamping
Co. P.
0. Box 05206
Cleveland, OH
44105
13257
Esna,
Ltd.
P.
0. Box 250 Agincourt
Toronto,
Ontario,
Canada
22526
Berg Electronics,
Inc.
Youk
Expressway
New
Cumberland, PA
17070
23499
Gavitt
Wire and
Cable, Division
of
Amerace
Esna
Corp.
455 N.
Quince St.
Escondido,
CA 92025
24931
Specialty
Connector
Co.,
Inc.
3560 Madison
Ave.
Indianapolis,
IN 46227
25543
Prime
Publications
1160 Terra
Bell Ave.
Mountain View,
CA 94040
26365
Cries
Reproducer
Corp.
125
Beechwood Ave.
New Rochelle,
NY 10802
42838
National
Rivet and
Mfg.
Co.
1-21
East Jefferson St. Waupun,
WI
53963
70276
Allen
Mfg.
Co.
Box
570
Hartford,
CT 06101
70278
Allied
Steel and Conveyors,
Div.
of
Sparton Corp.
17333
Healy
Detroit, MI
48212
73743
Fischer
Special Mfg.
Co.
446 Morgan
St.
Cincinnati, OH 45206
74445
Holo-Krome
Co.
31 Brook
St.
West
Hartford,
CT 06110
76854
Oak Mfg.
Co., Division
of
Oak
Electro/Netics
Corp.
S. Main
St. Crystal
Lake, IL 60014
78189
Illinois
Tool Works,
Inc.
Shakeproof
Division
St. Charles Road
Elgin, IL 60126
79807
Wrought
Washer Mfg.
Co.
2100
S. 0 Bay St
.
Milwaukee, WI
53207
80009 Tektronix,
Inc.
P.
0. Box 500
Beaverton, OR 97005
83385
Central Screw Co.
2530
Crescent Dr.
Broadview, IL 60153
83501 Gavitt
Wire and
Cable, Division
of
Amerace'
Esna Corp.
Central
St. Brookfield, MA
01506
87308 Southern
Screw Co.
123 Barkley Road
Statesvill, NC 28677
97464
Industrial Retaining
Ring
Co.
57 Cordier
St.
Irvington,
NJ 07111
8-2
Mechanical Parts
List—
7A24
FIGURE
1
EXPLODED
Fig. &
Index
No,
Tektronix
Port No.
Seria
Eff
I/Model No.
Dscont
Qty
1 2 3 4 5
Name &
Description
Mfr
Code
Mfr Part Number
1-1
131-1171-00
2 CONN ,
RCPT , ELEC
: BNC
24931
28JR231-1
-2
366-1059-00
2 PUSH
BUTTON:
80009 366-1059-00
-3
366-1077-00
2 KNOB: GRAY
80009
366-1077-00
213-0153-00
1
.
SETSCREW:5-40
X 0.125
INCH
, HEX SOC , STL
74445 OBD
-4
366-1308-00
2
KNOB : RED
80009
366-1308-00
213-0153-00
1 . SETSCREW:5-40
X 0.125
INCH,
HEX SOC
, STL
74445
OBD
-5
366-1299-00
2
KNOB : GRAY
80009
366-1299-00
213-0153-00
2
. SETSCREW:5-40
X 0.125
INCH, HEX
SOC, STL
74445
ODD
-6
366-1163-00
1 KNOB:
LIGHT GRAY WITH
SETSCREW
80009
366-1163-00
213-0153-00
1 . SETSCREW:5-40
X 0.125 INCH,
HEX SOC , STL
74445
OBD
-7
366-1165-00
1 KNOB: GRAY
80009
366-1165-00
213-0153-00
1 .
SETSCREW:5-40
X 0.125 INCH,
HEX
SOC , STL
74445
OED
-8
366-0215-02
2 KNOB: LEVER
SWITCH
80009
366-0215-02
-9
366-1058-43
1 KNOB: LATCH
80009
366-1058-43
(ATTACHING PARTS)
-10
214-1095-00
1
PIN,
SPR, SPLIT:
13257
52-022-094-0187
-11
105-0076-00
1
REL
BAR LATCH:
80009
105-0076-00
-12
214-1280-00
1
SPRING,
HLCPS:
0.14 OD
X 1.126 INCHES
LONG
80009
214-1280-00
-13
214-1054-00
1
SPRING
, DETENT
:
LATCH
80009
214-1054-00
-14
105-0075-00
1 BOLT, LATCH:
80009
105-0075-00
-15
337-1064-04
2 SHLD,
SIDE, ELEC:
80009
337-1064-04
-16
348-0235-00
2
SHLD,GSKT,ELEC:
80009
348-0235-00
-17
333-1592-00
1 PANEL, FRONT:
7A2
4
80009 333-1592-00
-18
384-1165-00
2
EXTENSION,SHAFT:7
.80
INCHES LONG
80009
384-1165-00
-19
358-0216-00
1 BUSHING,
PLASTIC:0.
257 ID X 0.412
INCH
OD
80009
358-0216-00
-20
2 RESISTOR,
VAR:
(ATTACHING
PARTS
FOR EACH)
-21
210-0583-00
1 NUT,
PLAIN, HEX. :0.
25-32
X
0.312 INCH,BRS
73743
2X20319-402
-22
210-0223-00
1 TERMINAL, LUG:
0.2 5 INCH
DIA,SE
78189
2101-14-03-2520N
-23
131-1075-00
1 CONTACT , ELEC
:
GROUNDING
80009
131-1075-00
-24
386-1447-54
1 SUBPAKEL, FRONT:
80009
386-1447-54
(ATTACHING
PARTS)
-25
213-0192-00
4 SCR,TAG,THD FOR:6-32
X 0.50 INCH,PNK
STL
87308 OBD
-26
260-0816-00
1 SV7ITCH, SLIDE:
80009
260-0816-00
(ATTACHING
PARTS)
-27
211-0030-00
2 SCREW,MACHINE:2-56
X
0.25"82
DEG,FLH
STL
83385 OBD
-28
210-0405-00
2 NUT, PLAIN,
HEX. :
2-56
X 0.188
INCH,BRS
7374
3 2X12157-402
-29
119-0419-00
2 DELAY LINE,
ELEC:
80009
119-0419-00
(ATTACHING
PARTS FOR
EACH)
-30
211-0109-00
1
SCREW,MACHINE:4-40
X
0 .
875
" 10 ODEG ,FLH
STL
83385 OBD
-31
407-1172-00
2 BRKT,CKT
BOARD:
80009
407-1172-00
(ATTACHING
PARTS
FOR
EACH)
-32
211-0008-00
2 SCREW,
MACHINE:
4-40
X 0.25
INCH,PNH
STL
83385 OBD
-33
210-0586-00
1 NUT, PLAIN,
EXT
W:4-40
X
0.25 INCH,
STL
78189 OBD
-34
211-0007-00
1
SCREW,
MACHINE:4-40
X 0.188
INCH,PNL
STL
83385 OBD
-35
386-1402-00
1
PANEL
, REAR
:
80009
386-1402-00
(ATTACHING
PARTS)
-36
213-0192-00
4 SCR,TAG,THD FOR:6-32
X
0.50 INCH,PNH
STL
87308
OBD
-37
361-0326-00
1
SPACER, SLEEVE:
0.18
"ID X
0.25"OD X
0.10"
LG
80009
361-0326-00
-38
376-0039-00
2 ADPT, SHAFT,
CPLG: 0.128
AND
0.08
2
"DIA SHAFT
80009
376-0039-00
-
. EACH COUPLING INCLUDES:
213-0075-00
2
.
SETSCREW:4-40
X 0.094
INCH, HEX
SOC STL
70276
OBD
-39
376-0125-00
2 COUPLER,
SWITCH:
80009
376-0125-00
(ATTACHING
PARTS
FOR EACH)
213-0048-00
2 SETSCREW:4-40
X 0.125
INCH HEX
SOC STL
74445
OBD
-40
354-0251-00
4
RING, COUPLING:
80009
354-0251-00
-41
376-0124-00
2 COUPLER, DRIVER:
80009
376-0124-00
(ATTACHING
PARTS
FOR EACH)
213-0048-00
2 SETSCREW:
4
-40 X
0.125 INCH
HEX SOC STL
74445
OBD
8-3
Mechanical Parts List-7
A24
FIGURE
1 EXPLODED
(cont)
Fig. &
Index
No.
Tektronix
Part No.
Serial/Model
No.
Eff
Dscont
Qty
1-42
2
-43
210-0583-00
1
210-0046-00
1
-44
210-0937-00
1
-45
210-0940-00
1
672-0056-00
2
-46
211-0008-00
2
-47
129-0080-00
1
-48
1
-49
211-0116-00
6
-50
136-0252-04
3
-51
210-0779-00
7
-52
131-1031-00
7
-53
407-1262-00
1
-54
211-0097-00
2
-55
210-0004-00
2
-56
129-0299-00
2
-57
210-0004-00
1
-58
210-1002-00
1
-59
-
-60
211-0116-00
2
-61
131-1003-00
2
-62
210-0779-00
8
-63
131-1030-00
8
-64
131-1031-00
8
-65
344-0248-00
5
-66
214-1797-00
10
263-1021-00
1
-67
105-0243-00
1
-68
213-0214-00
1
-69
354-0391-00
2
-70
401-0081-02
2
-71
214-1139-00
_
214-1139-02
-
214-1139-03
-72
214-1127-00
4
-73
210-0406-00
12
-74
105-0436-00
1
-75
401-0115-00
1
-76
105-0437-00
1
-77
1
-78
211-0008-00
2
-79
211-0105-00
4
-80
220-0547-01
4
-81
131-1003-00
6
-82
136-0252-04
150
-83
214-0579-00
1
-84
407-0553-00
2
1 2 3 4
5
Name
&
Description
RES
I STOP,
VAR:
(ATTACHING
PARTS
FOR
EACH)
NUT,
PLAIN,
HEX.
:0.
25-32
X
0.312
INCH,BRS
WASHER,
LOCK :INTL,
0.2
6 ID X
0.40"
OD,STL
WASHER,
NONMETAL:
0.18 8 ID
X
0.312"OD
WASHER,
FLAT
: 0. 25
ID X
0.375
INCH
OD , STL
CKT BOARD
ASSY:
READOUT/ATTENDATOR
(ATTACHING
PARTS FOR
EACH)
SCREW,
MACHINE:
4
-40 X
0.25
INCH,PNH
STL
POST,NONMETALI:4-40
X
0.875 INCH
LONG
.
EACH CKT
BOARD
ASSY
INCLUDES:
. CKT
BOARD
ASSY
:
—READOUT
(SEE
A2&A4 EPL)
(ATTACHING
PARTS)
. SCR,ASSEM
WSHR:4-40
X 0.312
INCH,PNH
BRS
.
EACH CKT
BOARD
ASSY
INCLUDES:
. . SOCKET,
PIN
CONN:
0.18
8 INCH
LONG
.
.
RIVET,
TUBULAR:
0 . 051 OD
X 0.115
INCH
LONG
.
. CONTACT
ASSY:
CAM
SWITCH
TOP
.
BRKT,
ATTENUATOR:
(ATTACHING
PARTS)
. SCREW,
MACHINE
:4-40
X
0.312
INCH,PNH
STL
. WASHER,
LOCK
:INT, 0.12
ID
X0.26"
OD,STL
. POST,
ELEC
-MECH:
HEX,
0.333 INCH
LONG
(ATTACHING
PARTS
FOR
EACH)
. WASHER,
LOCK
:INT,
0.12
ID X0.26"
OD , STL
. WASHER,
FLAT:
0.125 ID
X 0.25
INCH OD,BRS
. CKT BOARD
ASSY:
ATTENUATOR
(SEE
A1&A3
EPL)
(ATTACHING
PARTS)
. SCR,ASSEM
WSHR:4-40
X
0.312 INCH,PNH
BRS
. .
CKT BOARD
ASSY
INCLUDES:
.
.
CONN,
RCPT,
ELEC:
CKT BD MT,3
PRONG
. . RIVET,
TUBULAR:
0.0 51 OD
X 0.115
INCH LONG
. . CONTACT
ASSY:
CAM SWITCH
,
BOTTOM
. . CONTACT
ASSY
.-CAM
SWITCH,
TOP
. . CLIP,
ATTENUATOR:
.
.
PIN,
CLIP:
. ACTR
ASSY, CAM SW;
.
. ACTUATOR
ASSY
INCLUDES
:
.
. LEVER,
SWITCH:
(ATTACHING
PARTS)
. . SCREW,
CAP
SCH:2-56
X
0.375"HEX HD STL
. .
RING,
RETAINING:
0.395
"FREE
IDX
0.025"STL
.
.
BEARING,
CAM
SW:FRONT
. .
SPRING,
FLAT
:GOLD COLORED
. .
SPRING,
FLAT:
GREEN
COLORED
. . SPRING,
FLAT: RED
COLORED
. . ROLLER,
DETENT:
0.12
5 DIA X 0.125
INCH L
. . NUT, PLAIN,
HEX. :
4
-40 X
0.188 INCH, BRS
. . DRUM,
CAM SWITCH:
.
.
BEARING,
CAM SW:
CENTER
. . DRUM, CAM
SWITCH:
CKT BOARD
ASSY:
AMPLIFIER(SEE
A5 EPL)
(ATTACHING
PARTS)
SCREW,MACHINE:4-40
X 0.25 INCH,PNH
STL
SCREW,MACHINE:4-40
X
0.188"100
DEG,FLH
STL
NUT
BLOCK:
.
CKT BOARD
ASSY
INCLUDES:
. CONN, RCPT,
ELEC: CKT
BD MT,
3 PRONG
.
SOCKET,
PIN
CONN:
0.18 8 INCH LONG
. TERM,
TEST PT:0.40
INCH
LONG
.
BRKT
,
COMPONENT
:
Mfr
Code
73743
78189
76854 79807
80009
83385
80009
83385
22526
42838 80009 80009
83385
78189
80009
7
818 9
12327
83385
80009 42838 80009 80009 80009 80009 80009
26365
70278
97464
80009 80009 80009 80009 80009 73743 80009
80009
80009
83385
83385
80009
80009 22526
80009 80009
Mfr
Part
Number
2X20319-402
1214-05-00-0541C
OBD
OBD
672-0056-00
OBD
129-0080-00
OBD
75060-001
RA-29952715
131-1031-00 407-1262-00
OBD
1204-00-00-0541C
129-0299-00
1204-00-00-0541C
OBD
OBD
131-1003-00
RA-29952715
131-1030-00
131-1031-00
344-0248-00 214-1797-00 263-1021-00
015-2300-0001
OBD
3100-43-CD
401-0081-02 214-1139-00 214-1139-02 214-1139-03 214-1127-00
2X12161-402 105-0436-00
401-0115-00
105-0437-00
OBD OBD
220-0547-01
131-1003-00
75060-001
214-0579-00
407-0553-00
Mechanical
Parts List—
7A24
FIGURE
1 EXPLODED
(cont)
Fig. &
Index
No.
Tektronix
Part
No.
Serial/Model
No.
Eff
Dscont
Qty
1 2 3 4
5
Name &
Description
Mfr
Code
1-85
262-0965-00
1 . SW.RTRY,
WIRED:
80009
(ATTACHING
PARTS)
-86
210-0590-00
1
.
NUT,
PLAIN,
HEX.
:0.
375
X 0 .
4 38INCH
,
STL
73743
-87
210-0012-00
1 . WASHER,
LOCK :INTL,0.
375 IDX
0.50"
OD STL
78189
-
SWITCH
INCLUDES:
260-1493-00
1 . . SWITCH, ROTARY:
25543
-88
175-0826-00
FT
.
.
WIRE
, ELECTRICAL
: 3
WIRE
RIBBON
08261
-89
175-0827-00
FT
. . WIRE,
ELECTRICAL:4WIRE
RIBBON
08261
-90
175-0828-00
FT
. . WIRE
,
ELECTRICAL
: 5 WIRE P.IBEON
23499
-91
407-0912-00
1 .
BRKT
COMPONENT:
80009
-92
214-1061-00
1 SPRING
, GROUND
: FLAT
80009
-93
426-0736-00
1 FR
SECT, TOP:
80009
-94
426-0737-00
1
FR
SECT, BOTTOM:
80009
-95
175-0825-00
FT
WIRE,
ELECTRICAL:
2 WIRE RIBBON
23499
-96
175-0826-00
FT
WIRE,
ELECTRICAL:
3
WIRE
RIBBON
08261
-97
175-0827-00
FT WIRE,
ELECTRICAL:
4 WIRE
RIBBON
08261
-98
175-0828-00
FT WIRE,
ELECTRICAL:
5 VJIRE RIBBON
23499
-99
175-0829-00
FT
WIRE,
ELECTRICAL:
6 WIRE
RIBBON
83501
-100
175-0832-00
FT
WIRE, ELECTRICAL:
9 WIRE
RIBBON
23499
-101
119-0418-00
2
CPLR,XMSN
LINE:
80009
Mfr Part
Number
262-0965-00
2X28269-402
1220-02-00-0541C
5-43681-411
TEK-175-0826-00
TEK-175-0827-00
TEK-175-0828-00
407-0912-00
214-1061-00
426-0736-00 426-0737-00
TEK-175-0825-00
TEK-175-0826-00 TEK-175-0827-00 TEK-175-0828-00
TEK-175-0829-00 TEK-175-0832-00
119-0418-00
ACCESSORIES
ndex
Tektronix
Serial/Model No.
No.
Part No.
Eff
Dscont
Qty
13 3 4
5
Name &
Description
Code
Mfr.
Part Number
2-
070-1485-00
MANUAL, TECHrSERVICE
80009
070-1486-00
Fig.
&
Index
No.
2
-
-1
-2
-3
-4
7A24
DUAL TRACE
AMPLIFIER
REPACKAGING
Tektronix
Seriat/Model
No.
Part No.
Eff
Dscont
065-0125-00
004-0241-00 004-0242-00 004-0243-00 004-0748-00
Qty 1
2 3
4
5
Name &
Description
Mfr.
Code
Mfr. Part
Number
1
CARTON
ASSEMBLY;
80009
065-0125-00
2
.
CARTON
ASSEMBLY INCLUDES:
.
CASE HALF:
80009
004-0241-00
1
END
CAP,REAR;
80009
004-0242-00
1
.
END CAP,FRONT:
80009
004-0243-00
1
CARTON;
80009
004-0748-00
MANUAL CHANGE
INFORMATION
At
Tektronix, we
continually
strive to keep
up with
latest
electronic
developments
by
adding circuit and
component
improvements to our
instruments as
soon as
they are
devel-
oped and
tested.
Sometimes, due
to printing
and
shipping
requirements,
we
can't get these
changes
immediately
into printed
manuals.
Hence,
your manual
may
contain
new change
information
on
following pages.
A single
change may
affect
several sections.
Sections of
the
manual
are often
printed
at different
times, so
some
of
the information on
the
change
pages
may
already be
in
your
manual. Since
the
change
information
sheets
are carried
in the manual
until ALL
changes
are
permanently
entered,
some
duplication
may
occur. If no
such change
pages
appear
in
this section,
your
manual is
correct as
printed.
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