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.