Tektronix 7613 User manual

TEKTROND©
7613/R7613
STORAGE
OSCILLOSCOPE
SERVICE
INSTRUCTION MANUAL

BEFORE
READING
PLEASE
CHECK
FOR
CHANGE
INFORMATION
AT
THE
REAR
OF
THIS
MANUAL.
Tektronix, Inc.
070- 1463-00
THIS MANUAL REPRINTED OCT 1974
TEKTRONIX
7B613/R7613
STORAGE
OSCILLOSCOPE
SERVICE
INSTRUCTION MANUAL
P.O. Box 500 Beaverton, Oregon 97005
972
7613

WARRANTY
All TEKTRONIX instruments are warranted against
defective materials and workmanship for one year. Any
questions with respect to the warranty 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 . This will assure you the fastest possible
service. Please include the instrument Type Number or Part
Number and Serial Number with all requests for parts or
service.
Specifications and price change privileges reserved.
Copyright © 1972 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 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.
7613

SECTION 1
SECTION 2
SECTION 3
SECTION 4
SECTION 5
SECTION 6
SECTION 7
TABLE OF CONTENTS
OPERATING INFORMATION
Controls And Connectors
CALIBRATION
Test Equipment Required
Index to Calibration Procedure
CIRCUIT DESCRIPTION
Block Diagram of 7613
Basic Storage Block Diagram
MAINTENANCE
Preventive Maintenance
Circuit Board Locator
Troubleshooting Chart
Corrective Maintenance
ELECTRICAL PARTS LIST
DIAGRAMS
MECHANICAL PARTS LIST
7613/R7613 Service
Page
1-1
2-2, 2-3
2-4
3-1
3-2
3-50
4-1
4-4, 4-5
49
4-10
7613

The TEKTRONIX 7613 Storage Oscilloscope is a solid-state, light-weight instrument designed for general purpose
applications. This instrument has three plug-in compartments that accept TEKTRONIX 7000-Series plug-in units to
form a complete measurement system. The two plug-in compartments on the left are for vertical preamplifiers. The
right plug-in compartment is connected to the horizontal deflection system. Electronic switching is used to connect
either vertical plug-in to the vertical deflection system. It is possible to alternately display the vertical signals
(multi-trace display). The flexibility of this plug-in feature and variety of plug-in units available allow this system to be
used for many measurement applications.
This instrument features a large screen, 8 X 10 division display; each division equals 0.9 centimeter. The Cathode ray
tube (CRT) provides small spot size and a fast storage writing speed. Storage operation uses a variable Persistence mode
and a Save mode. The variable Persistence mode electrically controls the retention of the CRT. The Save mode provides
longer retention of the stored display, and a lockout function to prevent accidental erasure of the stored display.
7613/R7613
7613

Section 1—7613/R7613 Service
OPERATING
INFORMATION
The 7613/R7613 can be operated from either a 110-volt
or a 220-volt line source. In addition, three operating ranges
can be selected by a jumper located on the Rectifier board.
Select a range which is centered about the average line volt-
age to which the instrument is connected.
See Table 1-1 for ranges and proper fuses.
TABLE 1-1
Regulating Range and Fuse Data
Pins Regulating Range
Selected 110-volt nominal 220-volt nominal
LOW 90 to 110 volts 180 to 220 volts
MED 99 to 121 volts 198 to 242 volts
HI 108 to 132 volts 218 to 262 volts
Line fuse 3.2 A slow-blow 1.6 A slow-blow
The 7613 can be operated where the ambient air
temperature is between 0° and +50°C. The instrument is
cooled by forced air. Adequate clearance must be provided
on back and bottom of the instrument. The R7613 is
cooled by forced air. Adequate clearance must be provided
behind the air filter and on the right side. A thermal cutout
in the instrument provides thermal protection by
interrupting the power to the instrument if the internal
temperature exceeds a safe operating level.
OPERATING SET-UP INFORMATION
INTENSITY Midrange
READOUT Midrange
FOCUS Well defined display
STORED INTENSITY Midrange
PERSISTENCE Midrange
SAVE TIME Clockwise
STORE Out (release)
SAVE Out (release)
NON-STORE In (pressed in)
VERT MODE LEFT (pressed in)
TRIG SOURCE VERT MODE
GRATICULE ILLUM As desired
POWER On {pulled out)
Display Modes
Install two vertical plug-in units into the vertical com-
partments. Set the deflection factor for two volts/division.
Connect the 4 V calibrator signal to both vertical plug-in
units. Use a pin jack to BNC connector and a dual input
coupler connector. [Install a time-base plug-in unit in the
horizontal compartment. Set the time/division switch to
0.5 millisecond/division, and adjust the trigger level for a
stable display. The left vertical signal is displayed.
Press the RIGHT button of the VERT MODE switch.
The display should be stable for either vertical unit
selected.
Press the ALT button of the VERT MODE switch.
Adjust the position controls of each vertical unit so that
two displays are present on the CRT screen. One vertical
signal is displayed per sweep and the other vertical signal is
displayed at the next sweep. This is a dual trace mode.
Press the CHOP button of the VERT MODE switch. A
dua! trace will be displayed on the CRT screen, Each verti-
cal signal is displayed during the sweep, on a time-sharing
basis.
Press the ADD button of the VERT MODE switch. The
display is the algebraic sum of both vertical signals.
Stored Displays
Obtain a display by following the instructions under
OPERATING SET-UP INFORMATION and Display Modes.
Press the STORE button, the instrument is in the vari-
able persistence mode. Change the vertical position, and
note that the stored display will fade out and the new
Position will be stored. The time that a display is stored on
the screen of the CRT is controlled by the PERSISTENCE
contro! (clockwise decreases the retention).
Press the SAVE button. All functions are locked out
except the SAVE TIME control and the STORED INTEN-
SITY control. The STORED INTENSITY controls the
brightness of the stored display. The SAVE TIME controls
the length of time that a display is stored. When the SAVE
TIME control is at MAX and in the switch detent (mini-
mum intensity) the display is not visible. Turning the SAVE
TIME control clockwise will make the stored display
visible, but will reduce the storage time. While in the MAX
save mode, the stored information will remain stored for
long periods of time even with the power turned off. Turn
the instrument on, and adjust the SAVE TIME control
setting for a visible display.
Care of Storage Screen
1. Use minimum beam intensity to produce a clear well
defined display.
2. Avoid repeated use of the same area of the CRT.
3. Do not leave a stored display on the screen when it is
no longer needed.
4, Use MAX SAVE when storing a display for extended
periods of time (minimum intensity).
5. Operate in the NON-STORE mode unless storage is
required.
BEAM FINDER
The BEAM FINDER switch provides a means of locating
a display which overscans the viewing area.
Press and hold the BEAM FINDER switch in. Increase
the vertical and horizontal deflection factors until the
display is reduced to about two divisions, and adjust the
horizontal and vertical position contro! settings to center
the display. Release the switch for normal operation.
For more detailed operating instructions see the 7613/
R7613 Operators Manual.
1-1
7613

Operating Information—7613/R7613 Service
FUNCTIONS OF CONTROLS AND CONNECTORS
FRONT PANEL
. INTENSITY—Controls brightness of the
display. Control is inoperative when hori-
zontal compartment vacant.
2. READOUT—Turns on the readout display
and controls the readout intensity.
3, FOCUS-Provides adjustment for optimum
display definition.
4, GRATICULE ILLUM-—Controls graticule
illumination.
5. BEAM FINDER—When pressed, the display
is limited within the graticule area.
2
. TRIG SOURCE-Selects source of internal
trigger signal for the time base plug-in in
the horizontal compartment.
LEFT: The trigger signal is obtained from the plug-in unit in
the left vertical compartment only.
VERT MODE: Trigger signal automatically follows the
vertical display except in CHOP and ADD; then the trigger
signal is the algebraic sum of the signals from the left and
right vertical compartments.
RIGHT: The trigger signal is obtained from the plug-in unit
in the right vertical compartment only.
ee gh 2
a! (4)
vertical compartments are algebraically added and the sum is
displayed on the CRT.
CHOP: Signals from plug-in units in both the left and right
vertical compartments are displayed (dual trace). The display
is switched between vertical plug-in units at approximately a
one megahertz rate.
RIGHT: Signals from plug-in unit in right vertical compart-
ment is displayed.
NON-STORE —Selects non-store operation.
STORE-Selects storage operation.
PERSISTENCE—Controls the retention of the stored display.
SAVE-—Prevents accidental erasure or additional storage of
information.
SAVE TIME—Used with the SAVE mode for extending re-
tention. When in the MAX detent there is no visible stored dis-
play in all storage modes.
STORED INTENSITY—Selects stored writing speed and view
time combination (controls brightness of stored display).
Camera Power (Not Labeled)—Three-pin connector on CRT
bezel provides power output (+15 V). Receives remote single
sweep reset signal from compatible camera systems, and a
ground pin connection.
ERASE-—Erases stored display.
10.
7. POWER-Switch controls the power to the instrument. Light
indicates that the power switch is on and that the instrument is mM
connected to a line voltage source. -
8. CALIBRATOR-Calibrator output pin jacks (4V, 0.4V, 13,
40 mV, and ground). Positive-going pulse or DC voltage selected
by changing internal jumper.
14,
9. VERT MODE-Selects vertical mode of operation.
LEFT: Signals from plug-in unit in left vertical compartment
15,
are displayed.
ALT: Signals from both plug-in units in both the left and 16.
right vertical compartments are displayed (dual trace).
Display switches between vertical plug-in units after each
sweep.
ADD: Signals from plug-in units in both the left and right 17.
REAR PANEL
1, FUSE-—Line voltage fuse.
2, REMOTE ERASE IN-Provides external connection for remote
erase.
3. EXT SS RESET IN—Remote single sweep reset.
4. EXT Z AXIS IN-Input for intensity modulation of the CRT
display.
5. VERT SIG OUT—Vertical signal selected by TRIG SOURCE
switch (LEFT, RIGHT, ALT and ADD).
6. +GATE OUT-Gate signal selected by gate selector switch
(Main, Auxiliary, and Delay).
7. +SAWTOOTH OUT-—Positive-going sawtooth from time-base
unit.
1-2
7613

Section 2—7613/R7613 Service
CALIBRATION
Calibration Interval
To assure instrument accuracy, check the calibration of
the 7613 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.
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
General. This section provides several features to facili-
tate calibration of the 7613. These are:
index. An index is given preceding the calibration
procedure to aid in locating a step.
Partial Procedure. A partial calibration is often desirable
after replacing components, or to touch up the adjustment
of a portion of the instrument between major recalibra-
tions. To calibrate only part of the instrument, set the
controls as given under Preliminary Control Settings and
start with the nearest Equipment Required list preceding
the desired portion. 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. If
re-adjustment is necessary, also check the calibration of any
steps listed in the INTERACTION- part of the step.
Complete Calibration Procedure. Completion of each
step in the following calibration procedure insures that this
instrument is both correctly adjusted and performing
within all given tolerances.
IMPORTANT NOTE
All waveforms shown in this section were taken with
a TEKTRONIX Oscilloscope Camera System, unless
noted atherwise.
TEST EQUIPMENT REQUIRED
General
The test equipment and accessories, or its equivalent,
given in the Test Equipment table is required for complete
calibration of the 7613. Specifications given for the test
equipment are the minimum necessary for accurate calibra-
tion. Therefore, the specifications of any test equipment
used must meet or exceed the listed specifications. All test
equipment is assumed to be correctly calibrated and
operating within the listed specification. Detailed operating
instructions for the test equipment are not given in this
procedure. Refer to the instruction manual for the test
equipment if more information is needed.
Special Calibration Fixtures
Special TEKTRONIX calibration fixtures are used in this
procedure 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 adjust this instrument. This Calibration
procedure is based on the first item of equipment given as
an example of applicable equipment. When other
equipment is substituted, control settings or calibration
setup may need to be altered slightly to meet the
requirements of the substitute equipment. If the exact item
of test equipment given as an example in the Test
Equipment table is not available, first check the Specifica-
tions column carefully to see if any other equipment is
available which might suffice. Then check the Usage
column to see what this item of test equipment is used for.
lf used for a check or adjustment which is of little or no
importance to your measurement requirements, the item
and corresponding step(s) can be deleted.
The following procedure is written to completely check
and adjust the 7613 to the limits given in Section. 2 of the
Operators Manual and to allow interchanging 7000-series
plug-in units between 7000-series mainframes without the
need to recalibrate the instruments each time. If the
applications for which you will use the 7613 do not require
the full available performance from the 7613/plug-in
combination, this procedure and the required equipment
list can be shortened accordingly. For example, the basic
measurement capabilities of this instrument can be verified
by checking vertical deflection accuracy, vertical
square-wave response, and basic horizontal timing with
7000-series real-time plug-in units and an accurate square
wave signal. Also, if the 7613/plug-in combination is to be
used as a fixed system without the need to interchange
plug-in units, all tests can be made by substituting vertical
plug-in units and applicable test signals for the 067-0587-01
mainframe standardizer calibration fixture.
2-1
7613

Calibration—-7613/R7613 Service
TEST EQUIPMENT
Examples of Applicable
Description Minimum Specifications Usage Test Equipment
1. Precision DC Range, zero to 150 volts; | Calibrator output accuracy | a. TEKTRONIX 7D13 Digital
voltmeter accuracy, within 0.2%. check and adjustment. | Multimeter (test oscilloscope must
Low-voltage power supply | have Readout System).
adjustment.
b. Fluke Model 825A Differential DC
Voltmeter.
2. DC voltmeter
(VOM)
Range, zero to 4000 volts;
accuracy, checked to with-
in 1% at —1500 volts.
High-voitage power supply
check. Z-axis DC levels
adjustment.
a. Triplett Model 630-NA.
b. Simpson Model 262.
3. Time-mark
Marker outputs, 10 nano-
CRT geometry check and a. TEKTRONIX 2901 Time-Mark
generator seconds to 0.1 second; | adjustment. Horizontal | Generator.
marker accuracy, within | timing check and adjustment.
0.1%. Trigger output, one b. TEKTRONIX 184 = Time-Mark
millisecond. Generator.
4, High-frequency Frequency, 65 to above | Vertical bandwidth check. | TEKTRONIX calibration fixture
constant amplitude 190 megahertz, reference | Vertical amplifier isolation {| 067-0532-01 recommended.
signal generator frequency, 3 megahertz | check.
output amplitude variable
from 0.5 volt to 5 volts;
amplitude accuracy, with-
in 1% of reference as
output frequency changes.
5. Medium-fre- Frequency, 50 to 70 mega- | External Z-axis operation ja. TEKTRONIX 191 Constant Ampli-
quency constant- hertz; reference frequency, | check. Vertical bandwidth | tude Signal Generator.
amplitude signal
generator
50 sikilohertz; output
amplitude, variable from
five millivolts to five volts
peak to peak into 50
ohms; amplitude accuracy,
constant within 3% of
reference as output
frequency changes.
check. Vertical amplifier iso-
lation check. Horizontal
bandwidth check.
b. General Radio 1215-C with 1263-C
Amplitude Regulating Power Supply.
6. Low-frequency
signal generator
Frequency, 35 kilohertz;
output amplitude, variable
from 50 to 100 miltivolts.
X-Y phase shift check. a. General Radio 1310-B Oscillator.
7. Test-oscilloscope
system (dual-trace)
Bandwidth, DC to 50
megahertz; minimum de-
flection factor, 10
millivolts/division;
accuracy, within 3%.
Horizontal limit centering ad-
justment and + GATE OUT.
a. TEKTRONIX 7503 or 7504 Oscil-
loscope with two 7A15A or 7A16
Amplifier and 7B50 or 7B53A Time-
Base plug-in units, and two P6053
Probes.
b. TEKTRONIX 453A Oscilloscope
with two P6054 Probes.
8. Vertical plug-in
unit (two identical
units required), and
a dual display vertical
unit.
TEKTRONIX 7A-series 65
megahertz bandwidth
required for complete pro-
cedure as written.
Used throughout procedure
to provide vertical input to
7613 under calibration.
Identical units required only
for X-Y phase shift check.
The 7A18 is used to check
READOUT operation.
a. TEKTRONIX 7A15A and a 7A18
Amplifier (may be shared with
7000-series test oscilloscope)
b. Any 7A-series plug-in unit (tole-
rances in some steps may be limited if
low-frequency units used).
2-2
7613

TEST EQUIPMENT (cont)
Calibration—-7613/R7613 Service
Examples of Applicable
Description Minimum Specifications Usage Test Equipment
9. Time base TEKTRONIX 7B-series. Used through procedure to | a. TEKTRONIX 7B53A or 7B52
plug-in unit provide sweep. Time Base.
b. Any 7B-series plug-in unit.
10. Mainframe
standardizer cali-
bration fixture
Produces gain-check and
pluse-response waveforms.
Used throughout procedure
to standardize instrument so
plug-in units can be inter-
changed without complete
recalibration.
a. TEKTRONIX Calibration Fixture
067-0587-01.
b, Calibrated 7000-series plug-in units
with suitable signal sources may be
substituted if lower perforrnance is
acceptable.
11. 10X passive Compatible with 7B-series | Chopped mode operation | a. TEKTRONIX P6053 or P6054
probe external trigger input. check (adjustment pro- | Probe (may be shared with test
cedure). oscilloscope).
12. T connector Connectors, BNC. External Z-axis operation ja. TEKTRONIX Part No.
check. 103-0030-00.
13. Termination impedance, 50 ohms; | Horizontal timing check and |}a. TEKTRONIX Part No.
accuracy, +2%; connec- | adjustment. X-Y phase shift | 011-0049-01.
tors, BNC. check,
14, Dual-input Connectors, BNC. Added operation check. X-Y | a. TEKTRONIX Calibration Fixture
coupler phase shift check. 067-0525-00.
15. Cable (two Impedance, 50 ohms; | Used throughout procedure ja. TEKTRONIX Part No.
required) type, RF-58/U; length, 18 | for signal interconnection. 012-0076-00 (18-inch). TEKTRONIX
and 42 inches; connectors, Part No. 012-0057-01 (42-inch).
BNC.
16. GR in-line Impedance, 50 ohms; | External Z-axis operation |a. TEKTRONIX Part No.
termination accuracy, +2%; connec- | check. Vertical bandwidth | 017-0083-00.
tors, GR874 input with | check. Vertical amplifier iso-
BNC male output. lation check. Horizontal
bandwidth check.
17. Cable Impedance, 50 ohms; type | External Z-axis operation ja. TEKTRONIX Part No.
RG-213/U: electrical | check. Vertical bandwidth | 017-0502-00.
length, five nanoseconds; ; check. Vertical amplifier iso-
connectors, GR874. lation check. Horizontal
bandwidth check.
Adapts pin jacks to BNC | Added operation check. Trig) |a. TEKTRONIX Part No.
18. BNC to pin-
jack cable
male connector.
ger source operation check.
Astigmatism adjustment.
175-1178-00 (one supplied as standard
accessory).
19. Screwdriver
Three-inch shaft,
inch bit.
3/32-
Used throughout adjustment
procedure to adjust variable
resistors.
a. Xcelite R-3323.
20. Low-capacitance
screwdriver
1 1/2-inch shaft.
Used throughout adjustment
procedure to adjust variable
capacitors.
a, TEKTRONIX Part No.
003-0000-00.
7613