Tektronix D10 User manual

INSTRUCTION,
MANUAL
Serial hiumber
- D10
SINGLE BEAM
DISPLAY UNIT
5 q3 7 73 FO
G76 - 1774
Tektronix, Inc, ®@ P. O. Box 500 ® Beaverton, Oregon 97005 @ Phone [phone] ® Cables: Tektronix
070-1132-00 671 ©

All Tektronix instruments are warranted against
defective materials and workmanship for one year.
Any questions with respect to the warranty,
mentioned above should be taken up with your
Tektronix Field Engineer or Representative.
All requests for repairs and replacement parts should
be directed to the Tektronix Field Office or
Representative in your area. This procedure will assure
you the fastest possible service. Please include the
instrument Type (or Part Number) and Serial or Model
Number with all requests for parts or service.
Specifications and price change privileges reserved.
Copyright © 1971 by Tektronix, Inc., Beaverton,
Oregon. Printed in the United States of America. All
rights reserved. Contents of this publication may not be
reproduced in any form without permission of the
copyright owner.
U.S.A. and foreign Tektronix products covered by
U.S. and foreign patents and/or patents pending.
—

D10
SECTION 1 SPECIFICATION
introduction
Table 1-1 Electrical Characteristics
SECTION 2 OPERATING INSTRUCTIONS
Preliminary Information
Controls and Connectors
Basic Operation
General
Setup Information
Calibration Check
Beam Finder
External Intensity Input
General Operating Information
Graticule
Intensity Control
Display Focus
Trace Alignment Adjustment
Beam Finder
Intensity Modulation
Calibrator
Display Photography
Oscilloscope Applications
SECTION 3 CIRCUIT DESCRIPTION
Block Diagram Description
Detailed Circuit Description
Deflection Amplifiers
Page
1-1
1-1
2-1
2-1
2-1
2-1
2-1
2-2
2-2
2-2
2-2
2-2
2-2
2-2
2-3
2-3
2-3
2-3
2-3
2-3
3-1
3-1
3-1
3-1
CIRCUIT DESCRIPTION (cont) Page
CRT Circuit 3-1
High-Voltage Regulator 3-2
High Voltage Outputs 3-2
CRT Control Circuits 3-2
SECTION 4 CALIBRATION
Instrument Maintenance 4.7
Services Available 4-1
Test Equipment Required 4-1
Short-Form Procedure and Index 4-2
Calibration Procedure 4-2
SECTION 5 ELECTRICAL PARTS LIST
SECTION6 DIAGRAMS
Symbols and Reference Designators
Schematic Diagrams and Component
Board Locations |
SECTION 7 MECHANICAL PARTS LIST
Abbreviations and symbols used in this manual are based on
or taken directly from IEEE Standard 260 “Standard
Symbols for Units”, MIL-STD-12B and other standards of
the electronics industry. Change information, if any, is
located at the rear of this manual.

Di simele akan
=
INTENSITY
a
CALIBRATOR
40000 AmA ohh
STEP
ATTEN BAL
TIPLE BASE /ARAPL
Fig. 1-1.5103N Oscilloscope with a D10 Single Beam Display Unit
D10
®)

D10
Change information, if any, affecting this section will be found at the rear of this manual.
Introduction
The D10 Single-Beam Display unit provides a single-
beam cathode-ray tube (CRT) display for Tektronix
5100-series Oscilloscopes. The D10 module is operated with
a power supply/amplifier module, and comprises one-half
of the oscilloscope mainframe. It has an electrostatic-
deflection CRT with an 8 X 10 division (one-half inch
per division) internal black graticule. A bright display is
provided by a 3.5-kilovolt accelerating potential. Provision
is made for application of Z-axis signals, and a front-panel
loop provides a calibration signal.
The following electrical characteristics apply over an
ambient temperature range of O°C to +50°C. Refer to the
5100-series Oscilloscope System manual for environmental
specifications.
TABLE 1-1
ELECTRICAL CHARACTERISTICS
Characteristic Performance
Requirement
Supplemental Information
Cathode-Ray Tube
Phosphor P31 standard.
CRT Accelerating Voltage 3.5 kilovolts.
Orthogonality 90°, within 1°.
Geometry
0.1 division or less.
External Intensity Input
Useful Input Voltage
+5 volts will turn on display to a
normal brightness level from an off
level; —5 volts will turn display off
from a normal brightness level.
Usable Frequency Range
DC to one megahertz.
Input R and C
About 10 kilohms, paralleled by about
40 picofarads.
Maximum Safe Input
+50 volts (DC + peak AC).
Calibrator
Voltage 400 millivolts, within 1%.
Current 4 milliamperes, within 1%.
Frequency Twice the line frequency.
Power Input
Line Voltage (RMS)
With standard transformer
Nominal 110 V, 120 V; within 10%.
With optional export transformer | Nominal 100 V, 110 V, 120 V, 200 V,
220 V, 240 V; within 10%.
1-1

-Specification—D10
ELECTRICAL CHARACTERISTICS (cont)
Characteristics Performance Requirement Supplemental Information
Line Frequency Range
60 hertz and 400 hertz.
50 to 60 hertz and 400 hertz.
With standard transformer
With optional export transformer
Power Consumption 140 watts maximum.
(including Power Supply/
Amplifier module)
1-2

D10
SECTION 2
ATING INSTRUCTIONS
Change information, if any, affecting this section will be found at the rear of this manual.
introduction
The D10 Single Beam display module operates with a
Tektronix 5100-series power supply/amplifier module to
form an oscilloscope mainframe. An understanding of the
D10 operation and capabilities is essential for obtaining
best results. This section of the manual gives a brief func-
tional description of the front-panel controls and connec-
tors, a familiarization procedure, and general operating
information. .
Preliminary Information
The Operation Instructions section of the 5100-series
Oscilloscope System instruction manual should be referred
to for initial preparation. It contains information for install-
ation of modules and plug-ins, correct operating voltage and
temperature, and general oscilloscope usage.
CONTROLS AND CONNECTORS
This is a brief description of the function or operation of
the front-panel controls and connectors. More detailed in-
formation is given under General Operating Information.
INTENSITY Controls display brightness.
FOCUS Provides adjustment to obtain a
well-defined display.
POWER Used to turn instrument power on
or off.
BEAM FINDER Brings beam on-screen; limits dis-
play to area inside graticule and
intensifies beam.
CALIBRATOR Loop . Provides positive-going accurate
400-millivolt and 4-milliampere
square wave at a frequency of twice
the line frequency for calibration
and probe compensation.
EXT INTENSITY
INPUT Connector
Permits application of Z-axis signals
to the CRT (DC coupled). Positive-
going signal increases intensity.
TRACE ROTATION
(Rear Panel)
Permits alignment of the trace with
respect to the graticule lines.
®
BASIC OPERATION
General
The following steps demonstrate the use of the controls
and connectors of the D10. It is recommended that this
procedure be followed completely for familiarization with
this instrument.
Setup Information
1. Make sure the oscilloscope system is complete. The
-D10 must be properly connected to the power supply/
amplifier module and the single-beam auxiliary board must
be installed on the plug-in interface board. A 5A-series
amplifier plug-in should be in one of the vertical (left or
center) plug-in compartments and a 5B-series time-base
plug-in should be in the horizontal (right) compartment.
2. Set the POWER switch to off (pushed in) and con-
nect the D10 to a power source that meets the voltage and
frequency requirements of this instrument. See Operating
Voltage (Preliminary Procedure) in the Operating Instruc-
tions section of the 5100-Series Oscilloscope System
manual.
3.-Turn the INTENSITY control counterclockwise and
pull the POWER switch out to turn the instrument on. Set
the front-panel controls as follows:
D10
FOCUS Centered
Amplifier Plug-in
Display On
Position Centered
Volts/Div 1
Variable Volts/Div Cal (fully clockwise)
Input Coupling DC
Time-Base Plug-in
Display Alternate (button out)
Position Centered
Seconds/Div 5 ms
Variable Seconds/Div Cal (fully clockwise)
Sweep Magnifier Off
Triggering Level _ Counterclockwise
2-1

Operating Instructions—D10
Left (or Right if
the amplifier plug-in is in
the center compartment)
Auto Trig, DC
Coupling, + Slope,
Normal Sweep
Triggering Source
Triggering/Sweep Mode
4. Advance the INTENSITY control until the trace is at
the desired viewing level. The trace should appear near the
graticule center.
5. Connect a 1X probe or test lead from the CALI-
BRATOR loop to the amplifier plug-in input connector.
6. Turn the Triggering Level control clockwise until a
stable display is obtained. Adjust the vertical and horizontal
Position controls so the display is centered vertically and
starts at the left edge of the graticule.
7. Adjust the FOCUS control for a sharp, well-defined
display over the entire trace length.
8. Disconnect the input signal and position the trace
vertically so it coincides with the center horizontal line of
the graticule.
9. If the trace is not parallel with the center horizontal
line, see Trace Alignment Adjustment in this section.
Calibration Check
10. Move the trace two divisions below graticule center
and reconnect the calibrator signal to the amplifier plug-in
input connector.
11. The display should be four divisions in amplitude
with six complete cycles (five complete cycles for 50-hertz
line frequency) shown horizontally. An incorrect display
indicates that the oscilloscope mainframe or plug-ins need
to be recalibrated. See the Operating Instructions section of
the 5100-Series Oscilloscope System manual for complete
information.
Beam Finder
12. Move the display off-screen with the vertical Posi-
tion control.
13. Push the BEAM FINDER button and observe that
the display compresses into the screen area. Reposition the
display to screen center and release the BEAM FINDER
button.
2-2
External Intensity Input
14. Move the calibrator signal from the amplifier plug-in |
input connector to the EXT INTENSITY INPUT con-
nector.
15. Set the Triggering Source to Line and slowly rotate
the INTENSITY control counterclockwise until the trace
appears to be a series of dimmed and brightened segments.
The brightened segments correspond with the tops of the
calibrator square waves.
This completes the description of the basic operating
procedure for the D10. Instrument operations not ex-
plained here, or operations which need further explanation
are discussed under General Operating Information.
GENERAL OPERATING INFORMATION
Graticule
The graticule of the D10 is internally marked on the
faceplate of the CRT to provide accurate no-parallax
measurements. The graticule is marked with eight vertical |
and ten horizontal divisions. Each division is one-half inch
square. In addition, each major division is divided into five
minor divisions. The vertical gain and horizontal timing are
calibrated to the graticule so accurate measurements can be
made from the graticule.
Intensity Control
The intensity of the display on the CRT is controlled by
the INTENSITY control. This control is adjusted so the
display is easily visible but not overly bright. It will prob-
ably require readjustment for different displays or sweep
rates. Particular care should be exercised when only a spot
is displayed. A high-intensity spot may burn the CRT
phosphor and cause permanent damage to the CRT if
allowed to remain too long.
Display Focus
If a well-defined display cannot be obtained with the
FOCUS control, even at low intensity settings, adjustment
of the internal astigmatism control may be required.
To check for proper setting of the Astig control, slowly
turn the FOCUS control through the optimum setting with
a signal displayed on the CRT screen. If the Astig control is
correctly set, the vertical and horizontal portions of the
trace will come into sharpest focus at the same position of
the FOCUS control.

Trace Alignment Adjustment
If a free-running trace is not parallel with the horizontal
graticule lines, set the TRACE ROTATION adjustment
(rear panel) as follows: Position the trace to the center
horizontal line and adjust the TRACE ROTATION control
so the trace is parallel with the horizontal graticule lines.
Beam Finder
The BEAM FINDER switch provides a means of locating
a display which overscans the viewing area either vertically
or horizontally. When the BEAM FINDER switch is
pressed, the display is compressed within the graticule area.
To locate and reposition an overscanned display, use the
following procedure:
1. Press the BEAM FINDER switch, and while holding
it in, increase the vertical and horizontal deflection factors
until the display is reduced to about two divisions vertically
and four divisions horizontally (the horizontal deflection
needs to be reduced only when in the X-Y mode of opera-
tion).
2. Adjust the vertical and horizontal position controls
to center the display about the vertical and horizontal
centerlines.
3. Release the BEAM FINDER switch; the display
should remain within the viewing area.
Intensity Modulation
Intensity (Z-axis) modulation can be used to relate a
third item of electrical phenomena to the vertical (Y-axis)
and the horizontal (X-axis) coordinates without affecting
the waveshape of the displayed signal. The Z-axis modulat-
ing signal applied to the EXT INTENSITY INPUT changes
the intensity of the displayed waveform to provide this
type of display. The voltage amplitude required for visible
trace modulation depends on the setting of the INTEN-
SITY control. About +5 volts will turn on the display to a
normal brightness level from an off level, and about —5
volts will turn the display off from a normal brightness
level. ‘““Gray scale” intensity modulation can be obtained by
applying signals between these levels. Maximum safe input
Operating Instructions—D10
voltage is + or —50 volts. Usable frequency range of the
Z-axis circuit is DC to one megahertz.
Time markers applied to the EXT INTENSITY INPUT
provide a direct time reference on the display. With un-
calibrated horizontal sweep or X-Y operation, the time
markers provide a means of reading time directly from the
display. However, if the markers are not time-related to the
displayed waveform, a single-sweep display should be used
(for internal sweep only) to provide a stable display.
Calibrator
The internal calibrator of the D10 provides a convenient
signal source for checking basic vertical gain and sweep
timing. The calibrator signal is also very useful for adjusting
probe compensation as described in the probe instruction
manual. The output square-wave voltage is 400 millivolts,
within 1%, and the square-wave current is 4 milliamperes,
within 1%. The frequency of the square-wave signal is twice
the power-line frequency. The signal is obtained by clipping
the probe to the loop.
Display Photography
A permanent record of the CRT display can be obtained
with an oscilloscope camera system. The CRT bezel of the
D10 provides integral mounting for a Tektronix oscillo-
scope camera. A camera with a light source is required to
illuminate the graticule. The instruction manuals for the
Tektronix oscilloscope cameras include complete instruc-
tions for obtaining waveform photographs.
Oscilloscope Applications
The 5100-Series Oscilloscope, including its associated
display module and plug-in units, provides a very flexible
measurement system. Specific applications for the indi-
vidual plug-ins are described in the manuals for those units.
Refer to the Operating Instructions section of the 5100-
Series Oscilloscope System manual for basic oscilloscope
applications, including peak-to-peak AC voltage measure-
ments, instantaneous DC voltage measurements, compari-
son measurements, time duration measurements, deter-
mining frequency, risetime measurements, and X-Y phase
measurements.

pames
D10
Change information, if any, affecting this section will be found at the rear of this manual.
Introduction
This section of the manual contains an electrical descrip-
tion of the circuits in the D10 Single-Beam Display Unit.
An overall block diagram of the unit and complete sche-
matics are given on pullout pages at the rear of this manual.
BLOCK DIAGRAM DESCRIPTION
The Vertical and Horizontal Deflection Amplifiers pro-
vide final amplification for the signals from the plug-in
units. They produce push-pull outputs suitable to drive the
CRT vertical and horizontal deflection plates. Beam-finding
circuitry is incorporated to limit the display within the
screen area when the front-panel BEAM FINDER button is
pressed. A variable capacitor between the output lines of
the Vertical Deflection Amplifier permits adjustment of the
inherent phase shift between the vertical and horizontal
deflection
systems to zero degrees.
The CRT Circuit produces the high voltage (about —3.4
kilovolts) and contains the controls necessary for operation
of the cathode-ray tube. The CRT Circuit also contains the
Z-Axis Amplifier, which provides the drive signal to control
the intensity level of the display.
DETAILED CIRCUIT DESCRIPTION
Deflection Amplifiers
Vertical Deflection Amplifier. The Vertical Deflection
Amplifier provides the final amplification of signals applied
to the vertical plug-in units. It produces a push-pull output
sufficient to drive the CRT vertical deflection plates. The
amplifier consists of 0104, 0106, 0114, and Q116, con-
nected in a differential configuration.
The input signal arrives via P612 from the plug-in inter-
face circuit (power supply/amplifier module). The output
signal is developed across the collector-load resistors, R104
and R114, and is about 50 times the magnitude of the
input signal. R116, Vert Gain, provides 0106-0116 emitter
degeneration to set the gain of the stage to provide a cali-
brated vertical display.
Horizontal Deflection Amplifier. The Horizontal Deflec-
tion Amplifier consists of 0124, Q126, 0134, and 0136,
@)
and is basically the same as the Vertical Deflection Ampli-
fier just described. It provides final amplification of signals
from the horizontal plug-in unit, which arrive via P611.
Gain of the stage is set by R136, Horiz Gain, to provide a
calibrated horizontal display.
Beam Finder. If a high-amplitude signal or a misadjusted
control has deflected the trace or display off screen, it can
be located by pressing the front-panel BEAM FINDER
pushbutton. This opens $125, allowing current through
R125 into the emitter circuits of both deflection amplifiers.
R125 limits the current available to the transistors, and
hence, to the collector-load resistors. Thus the dynamic
range of the deflection plates is limited to an on-screen
level, and the display is compressed within the viewing area.
Also, when the BEAM FINDER switch is pressed, the Z
Axis Amplifier in the CRT Circuit senses the slight increase
in voltage level at the R108-R118-R128-R138 junction.
The Z Axis Amplifier produces a slight increase in CRT
beam intensity, allowing the trace to be displayed even
though the INTENSITY control may be fully counterclock-
wise.
X-Y Phasing. Variable capacitor C115, Phase, is con-
nected across the output collectors of the Vertical Deflec-
tion Amplifier. This capacitor is adjusted to eliminate the
' inherent phase difference between the vertical and hori-
zontal deflection systems when operating in the X-Y mode.
CRT Circuit
General. The CRT Circuit produces the high-voltage
potential and provides the control circuits necessary for
operation of the cathode-ray tube (CRT). This circuit also
includes the Z-Axis Amplifier stage to set the intensity of
the CRT display.
Z-Axis Amplifier. The Z-Axis Amplifier is a current
driven shunt-feedback operational amplifier with a voltage
output, and consists of O222, Q226, and 0234. The feed-
back path is from the collectors of 0226 and 0234 through
R227-C227 to the base of 0222. Q226 and Q234 are
connected as a collector-coupled complementary amplifier
to provide a fast, linear output signal while consuming mini-
mum quiescent power. The output voltage provides the
drive signal to control the CRT intensity level through the
Control-Grid Supply.

Circuit Description—D10
The output level of the Z-Axis Amplifier is established
by the voltage drop across R227 in reference to virtual
ground at the base of O222 (the operational amplifier
summing point). The current through R227 is determined
by the input current from any combination of several
sources, such as from the front-panel INTENSITY control,
plug-in interface (blanking, intensification, etc.), and from
0214. Q214 is an operational amplifier with two inputs;
one from the front-panel EXT INTENSITY INPUT connec-
tor and the other from the front-pane!l BEAM FINDER
switch. It sets those input signals to a level suitable for
proper response by the Z-Axis Amplifier.
High-Voltage Regulator
High-Voltage Primary. A repetitive, non-sinusoidal sig-
nal is produced by a phase-modulated switching circuit in
the primary of T240 and induced into the secondaries.
Current drive for the primary winding is furnished by 0252
in its conduction state. Q252 is turned on by positive-going
feedback applied through C259, L259, and R259 from the
feedback winding, and then turned off by switching action
from O262. A sample of the output DC voltage is modu-
lated by the AC from another feedback winding at the gate
of 0278 to establish the conduction time of Q252 and thus
maintain the proper output level. 0252 delivers energy to
T240 only once each cycle.
Assuming 0262 and O264 are off initially, R262 pro-
vides base drive for 0252, causing it to deliver current to
T240 primary. As Q252 conducts, the increasing current
through the primary winding induces a voltage into the
secondaries. The gate of 0278 is driven negative by the
voltage from the feedback winding, switching 0264 and
QO262 on. With conduction of 0262, base drive for Q252 is
removed.
With 0252 off, the transformer field collapses, reversing
the polarity of the voltage induced into the secondaries.
When the gate of Q278 is driven sufficiently positive to
switch Q264 and O262 off, Q252 is switched on again.
Q252 again delivers energy to the primary winding and the
action is repeated.
High-Voltage Regulation. Regulation is accomplished as
follows: Feedback from the —3400-volt cathode supply is
summed with low-voltage levels through the voltage divider
consisting of resistors R272B-E, R275, and R276 to estab-
lish the DC level at the gate of Q278. The AC component,
which is the switching signal, is derived from the trans-
former as described previously. If the output level of the
cathode supply drops below the nominal —3400 volts
(becomes more positive), the level at the gate of 0278 rises.
3-2
A new point is selected on the varying AC component to
cause switching of 0262-0264 later and hence increase con-
duction time of 0252. This allows more energy to be
delivered to the primary winding of T240, resulting in an
increase of voltage in the secondaries. Conversely, if the
output level increases, Q252 is allowed to conduct for a
shorter length of time. The DC level at the gate of Q278 is
adjusted by R275, H.V. Adj, to set the output at exactly
—3400 volts.
High Voltage Outputs
Transformer T240 has two high-voltage output windings
which provide the potentials required for the CRT cathode
and control grid supplies. The —3400-volt accelerating
potential for the cathode is supplied by half-wave rectifier
CR247. The cathode heater is elevated to the cathode
potential through R273.
Half-wave rectifier CR241 provides about —3450 volts
to establish bias voltage on the CRT control grid. This vol-
tage (and hence the CRT beam current) is dynamically
controlled by the Z-Axis Amplifier, which contains the
INTENSITY control, blanking inputs, and intensification
inputs. R245, Int Range, provides a fine adjustment of the
quiescent grid voltage to bias the CRT just below cutoff
when the Z-Axis Amplifier output is at its minimum
quiescent level (INTENSITY control counterclockwise and
no intensifying or blanking inputs).
Neon bulbs DS271, DS272, and DS273 provide protec-
tion to the CRT if the voltage difference between the
control grid and the cathode exceeds about 180 volts.
CRT Control Circuits
In addition to the INTENSITY control discussed pre-
viously, front-panel FOCUS and internal astigmatism con-
trols have been incorporated for arriving at an optimum ~
CRT display. FOCUS control R295 provides the correct
voltage for the second anode in the CRT. Proper voltage for
the third anode is obtained by adjusting Astig control
R286. In order to obtain optimum spot size and shape,
both the FOCUS and Astig controls are adjusted to provide
the proper electrostatic lens configuration in the CRT.
The Geom adjustment R285 varies the positive level on
the horizontal deflection plate shields to control the overall
geometry of the display. The TRACE ROTATION control,
R291, permits adjustment of the DC current through
beam-rotation coil L291 to align the display with the hori-
zontal graticule lines.

D10
Change information, if any, affecting this section will be found at the rear of this manual.
Introduction
This section of the manual contains a procedure to re-
turn the circuits of the D10 to within their designed
operating capabilities. Calibration is generally required after
a repair has been made, or after long time intervals in which
normal aging of components may affect instrument
accuracy. For initial inspection to verify instrument opera-
tion, the Basic Operation procedure in Section 2 should be
used (the instrument is checked with its covers on, using a
minimum of peripheral equipment).
Instrument Maintenance
Before complete calibration, thoroughly clean and
inspect this instrument as outlined in the Maintenance
section of the Oscilloscope System manual. Also, the
system manual contains information for general mainte-
nance of this instrument, including preventive maintenance,
component identification and replacement, etc.
Services Available
Tektronix, Inc. provides complete instrument repair and
calibration at local Field Service Centers and at the Factory
Service Center. Contact your local Tektronix Field Office
or representative for further information.
TEST EQUIPMENT REQUIRED
General
The following test equipment and accessories, or the
equivalent, is required for complete calibration of the D10.
Specifications given for the test equipment are the mini-
mum necessary for accurate calibration. Therefore, some of
the specifications listed here may be less rigorous than the
actual performance capabilities of the test equipment. All
test equipment is assumed to be correctly calibrated and
operating within the listed specifications.
Calibration Equipment Alternatives
If other test equipment is substituted, control settings or
calibration setup may need altering to meet the require-
ments of the equipment used. Detailed operating instruc-
tions
for the test equipment are not given in this procedure.
Refer to the instruction manual for the test equipment if
more information is needed.
Speciai Calibration Fixtures
Special Tektronix calibration fixtures are used in this
procedure only where they facilitate instrument calibration.
These special calibration fixtures are available from Tek-
tronix, Inc. Order by part number through your local Tek-
tornix Field Office or representative.
Test Instruments
1. Vertical plug-in unit. Any two Tektronix 5A-series
amplifiers can be used. The units should be of the same
type for checking X-Y phase relationship.
2. Time-base plug-in unit. Tektronix 5B10N recom-
mended.
3. DC voltmeter. Minimum sensitivity rating, 3500 volts
full scale with an accuracy of at least 3%.
4. Low-frequency sine-wave generator. Frequency, 2
kilohertz to at least 100 kilohertz; output amplitude, from
about 0.1 volt to 20 volts peak to peak into 50 ohms. For
example, General Radio 1310-B Oscillator (use a General
Radio 274-OBJ Adapter to provide BNC output).
5. Standard amplitude calibrator. Frequency, about one
kilohertz; square-wave output amplitude, 0.2 volt. DC vol-
tage outputs, + and —5 volts for checking Z-Axis input.
Tektronix Calibration Fixture 067-0502-01 has all of these
requirements.
Accessories
1. Coaxial cable. 50 ohms impedance, 42-inch length,
BNC connectors. Tektronix Part No. 012-0057-01.
2. Dual-input cable. Provides matched signal paths to
the X and Y channels; BNC connectors. Tektronix Part No.
067-0525-00.
3. Test lead to connect signal from the CALIBRATOR
loop to the vertical input.
4-1

Calibration—D10
SHORT-FORM PROCEDURE AND INDEX
D10 Serial No.
Calibration Date
Calibrated By .
1. Check/Adjust Power Supplies Page 4-3
Low-Voltage Supplies: Check that each supply is within
the tolerance listed in Table 4-1.
High-Voltage Supply: Meter reading between HV test
point and ground is —3400 V, +170 V. Adjust R275.
2. Check/Adjust CRT Operation Page 4-3
Intensity Range: Adjust R245 to establish proper CRT
bias.
Astigmatism: Adjust R286 for sharp display.
Trace Alignment: Adjust TRACE ROTATION to align
the trace parallel to the center graticule line.
Geometry: Adjust R285 for minimum curvature of
traces at screen edges.
3. Check/Adjust CRT Deflection System Page 4-4
Horizontal Centering/Sweep Magnification: Adjust
R675 to establish horizontal electrical zero at the screen
center.
Vertical and Horizontal Amplifier Gain: Adjust R116
and R136 to provide calibrated deflection factor.
X-Y Phasing: Check that phase difference between iden-
tical amplifier units is 1° or less. Adjust C115.
4. Check Z Axis Amplifier Page 4-5
External Intensity Input: +5 V turns the CRT on from
an off level; —5 V turns CRT off from an on level.
Beam Finder: Trace can be located.
5. Check Calibrator Loop Page 4-5
Amplitude and Frequency: Output amplitude is 400
mV, +1%; frequency is twice the power-line frequency.
4-2
CALIBRATION PROCEDURE
Preparation
NOTE
This instrument should be adjusted at an ambient
temperature between +20°C and +30°C (between
+68°F and +86° F) for best overall accuracy.
1. The D10 is operated with a 5100-series Power
Supply/Amplifier unit, forming an oscilloscope mainframe.
Remove the right side and bottom cabinet panels.
2. Insert an amplifier plug-in unit in each vertical plug-in
compartment (left and center). Insert a time-base plug-in
unit in the horizontal (right) compartment.
3. Connect the oscilloscope to the power source for
which it is wired.
4. Set the controls as given under Initial Control
Settings. Refer to Fig. 4-1 for location of internal adjust-
ments and test points.
Initial Control Settings
NOTE
Do not preset internal controls unless they are known
to be significantly out of adjustment, or unless repairs
have been made in the circuit. In these instances, the
particular controls can be set to midrange.
D10
INTENSITY Counterclockwise ©
FOCUS Midrange
POWER ON
Amplifier Units (both)
Display On
Position Midrange
Volts/Div 50 mV
Variable Calibrated (fully clockwise)
Input Coupling DC, GND

i
|
RON,
INC.
R245
Intensity L.
Range R275 |
HV Adj
—3400-volt
test point
IRED. VADER: ]
120.8.
WARNING _
ELECTRIC
SHOCK
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(B)
Fig. 4-1. Location of controls and test points.
Time Base Unit
Display Alt (button out)
Position Sweep starts at the left
edge of the graticule
Seconds/Div 0.5 ms
Variable Calibrated (fully clockwise)
Swp Mag Off (button out)
Triggering Mode Auto Trig, AC Coupling,
+ Slope
Triggering Source Display (Left and Right
buttons in)
Triggering Level Midrange
Calibration—D10
1. Check/Adjust Power Supplies
LOW-VOLTAGE SUPPLIES
a. Connect the DC voltmeter between each low-voltage
test point and ground. See Fig. 4-1 for test point locations.
b. CHECK —Each supply is within the tolerance listed in
Table 4-1,
NOTE
The tolerances in Table 4-1 include the possible 3%
measurement error of the VOM. If a supply is outside
the listed tolerance, refer to the Calibration section of
the 5100-series Oscilloscope System manual for com-
plete calibration instructions.
TABLE 4-1
Supply Tolerance
_-30V —29.025 V to —30.975 V
+5 V +4.75 V to +5.25 V
+30 V +28.95 V to +31.07 V
+205 V +175 V to +247.5 V
HIGH VOLTAGE SUPPLY
CAUTION
Turn off instrument power when connecting and
disconnecting the DC voltmeter.
c. Connect the DC voltmeter (20 kQQ/volt VOM set to
measure at least —3500 volts) between ground and the
—3400-volt test point.
d. CHECK—Meter reading must be —3400 volts, +170
volts.
ADJUST—R275, HV Adj, for —3400 volts.
e. Disconnect the DC voltmeter.
2. Check/Adjust CRT Operation
If you are beginning calibration with this step, set the
front-panel controls as listed under Initial Control Settings
except as follows:
Right Vertical
Plug-in Display Off (button out)
4-3

Calibration—D10
INTENSITY RANGE
a. Advance the INTENSITY control clockwise and
check that a trace can be obtained, then turn the control
fully counterclockwise.
b. ADJUST—Obtain a trace by setting R245, Intensity
Range, fully counterclockwise. Then press the BEAM
FINDER button and slowly adjust R245 clockwise until
the trace just disappears. Release the BEAM FINDER
button and adjust the INTENSITY control for a trace of
normal brightness.
ASTIGMATISM
c. Connect the low-frequency sine-wave generator to the
left vertical plug-in unit input connector through a coaxial
cable. Set the sine-wave generator for a 2-kilohertz, mini-
mum amplitude output.
d. Set the input coupling switch of the left vertical unit
to DC and adjust the sine-wave generator for about 6 divi-
sions of display amplitude. Adjust the time- base triggering
controls for a stable display.
e. ADJUST—R286, Astig, and front-panel FOCUS con-
trol for best focus of overall display.
f. Disconnect the sine-wave signal from the vertical
input connector.
TRACE ALIGNMENT
g. Move the trace to the center of the graticule (left
plug-in unit Position control).
h. CHECK —Trace should be parallel to the center grati-
cule line.
ADJUST—TRACE ROTATION control (rear-panel
screwdriver adjustment) to align the trace horizontally.
GEOMETRY
i. Press in the Display On button of the right vertical
plug-in unit to obtain a two-trace display. Position one of
the traces to the top of the graticule and the other trace to
the bottom.
j. CHECK—Bowing of the traces must not exceed 0.1 _
division.
4-4
ADJUST—R285, Geom, for minimum curvature of
the two traces.
k. Interchange the time-base plug-in unit with either of
the amplifier plug-in units to obtain a vertical sweep. Posi-
tion the vertical trace to the right edge of the graticule.
Readjust R285 if the bowing exceeds 0.1 division.
|. Replace the time-base plug-in unit in the horizontal
compartment and the amplifier unit in the vertical compart-
ment. Recheck horizontal geometry.
3. Check/Adjust CRT Deflection System
If you are beginning calibration with this step, set the
tront-panel controls as listed under Initial Control Settings,
except as follows:
INTENSITY Adjust for normal
viewing brightness.
Input Coupling (both
vertical plug-ins) DC
HORIZONTAL CENTERING/SWEEP MAGNIFIER
REGISTRATION
a. Set the standard amplitude calibrator for a O0.2-volt
square wave and connect its output to the input connector
of the left vertical plug-in unit through a coaxial cable.
Position the rising edge of one of the square waves to the
graticule center vertical line and push in the Swp Mag
button on the time-base unit.
b. CHECK—The corresponding rising edge on the
magnified sweep must be within two divisions of the grati-
cule center.
ADJUST—While switching between magnified and
unmagnified displays, alternately adjust R675, Horiz Cent
(see Fig. 5-1 in the 5103N Oscilloscope System manual for
location), and the horizontal Position control until the
rising edge of both the unmagnified and magnified displays
are at the graticule center.
VERTICAL AND HORIZONTAL AMPLIFIER GAIN
c. Temporarily disconnect the calibrator signal and
remove the time-base unit from the oscilloscope mainframe.
Move one of the amplifier units to the horizontal compart-
ment, then reconnect the 0.2-volt calibrator signal through
a dual-input cable to the input connectors of both amplifier
units.

Plgua
ca
NOTE
Use two amplifier plug-ins known to be accurately
calibrated, or verify their correct calibration by
applying a known signal and measuring the differen-
tial output at pins A7 and B7 of the plug-in connec-
tor. The deflection factor at the output is 50
millivolts/division.
d. Set the input coupling of the amplifier unit in the
horizontal compartment to DC. The display should be two
dots joined by a diagonal line. The dots represent opposite
corners of a square having sides 4 divisions in length. Adjust
the Position controls to center the display.
e. CHECK—Vertical and horizontal deflection is 4 divi-
sions, 0.04 division.
ADJUST—R116, Vert Gain, and R136, Horiz Gain,
so the vertical and horizontal deflection are each exactly 4
divisions.
X-Y PHASING
f. Set the low-frequency sine-wave generator for a
100-kilohertz, minimum amplitude output. Move the
coaxial cable from the standard amplitude calibrator output
to the sine-wave generator output to apply the sine-wave
signal to the amplifier plug-in units.
g. Adjust the vertical and horizontal Position controls to
center the diagonal display, then increase the sine-wave
generator amplitude until the display is 6 divisions ver-
tically and horizontally.
h. CHECK—The opening of the loop measured on the
graticule center line is 0.07 division or less. This indicates a
phase difference of 1° or less between the vertical and hori-
zontal deflection systems.
ADJUST—C115, Phase, for minimum loop opening (a
straight line) in the diagonal display.
i. Remove the low-frequency sine-wave generator. Move
the amplifier unit back to the vertical compartment and
re-install the time-base unit. .
BANDWIDTH
The requirement of the deflection amplifiers with
respect to bandwidth is that the response is sufficient to
pass a signal from any 5A-series plug-in unit. To verify
system bandwidth, refer to the calibration sections of the
individual plug-in unit manuals.
®
Calibration—D10
4. Check Z Axis Amplifier
Set the front-panel controls as listed under Initial Con-
trol Settings, except as follows:
INTENSITY Adjust for normal
brightness.
EXTERNAL INTENSITY INPUT
a. Turn the INTENSITY control until the traces cannot
be seen, but not fully counterclockwise.
b. Connect the standard amplitude calibrator output to
the EXT INTENSITY INPUT connector. Set the standard
amplitude calibrator for a +5-volt DC output.
c. CHECK—Traces of normal brightness are displayed.
d. Disconnect the calibrator signal and adjust the
INTENSITY control for traces of normal brightness. Set
the standard amplitude calibrator for a —5-volt DC output
and reconnect the cable to the EXT INTENSITY INPUT
connector.
e. CHECK—The traces are not visible.
f. Remove the standard amplitude calibrator.
BEAM FINDER
g. Press the BEAM FINDER button and observe that
the traces brighten slightly and compress into the graticule
area,
h. CHECK—While holding the BEAM FINDER button
in, neither trace can be positioned off screen.
i. Reposition the traces as desired and release the BEAM
FINDER.
5. Check Calibrator Loop
Set the front-panel controls as listed under Initial
Control Settings, except as follows:
INTENSITY Adjust for normal
brightness.
Left Vertical Plug-in
Volts/Div 1
Input Coupling DC
Right Vertical Plug-in
Display Off
4-5

Calibration—D10
a. Connect the front-panel CALIBRATOR loop to the
left vertical plug-in unit input connector using a test lead.
Adjust the time-base unit to trigger on the calibrator signal
and set the Seconds/Div switch to display a few cycles of
the waveform.
b. CHECK—Display amplitude is 4 divisions, +0.04 divi-
sion (400 millivolts, 1%). Frequency of the calibrator
4-6
signal is twice the power-line frequency, which can be
determined by measuring the length of time for two cycles
of display and taking the reciprocal.
c. Disconnect all test equipment.
This completes the calibration procedure for the D10.

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BHB
BHS
cap.
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comp
conn
CRT
csk
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dia
div
elect.
EMC
EMT
ext
F& |
FHB
FHS
Fil HB
Fil HS
hex.
HHB
HHS
HSB
HSS
inc
PARTS LIST
binding head brass
binding head steel
capacitor
ceramic
composition
connector
cathode-ray tube
countersunk
double end
diameter
division
electrolytic
electrolytic, metal cased
electrolytic, metal tubular
external
focus and intensity
flat head brass
flat head steel
fillister head brass
fillister head steel
height or high
hexagonal
hex head brass
hex head steel
hex socket brass
hex socket steel
inside diameter
incandescent
int
Ig
met.
mtg hdw
OD
OHB
OHS
P/O
PHB
PHS
plstc
PMC
poly
prec
PT
PTM
RHB
RHS
SE
SN or S/N
S or SW
TC
THB
thk
THS
tub.
var
Ww
WW
ABBREVIATIONS
internal
length or long
metal
mounting hardware
outside diameter
oval head brass
oval head steel
part of
pan head brass
pan head steel
plastic
paper, metal cased
polystyrene
precision
paper, tubular
paper or plastic, tubular, molded
round head brass
round head steel
single end
serial number
switch
temperature compensated
truss head brass
thick
truss head steel
tubular
variable
wide or width
wire-wound

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, instrument
type or number, serial or model 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.
SPECIAL NOTES AND SYMBOLS
x 000 Part first added at this serial number
00 x Part removed after this serial number
*000-0000-00 Asterisk preceding Tektronix Part Number indicates manufactured by
or for Tektronix, Inc., or reworked or checked components.
Use 000-0000-00 Part number indicated is direct replacement.