Tektronix TDS524A, TDS540A, TDS520A, TDS544A User Manual
Performance Verification
TDS 520A, 524A, 540A, & 544A
Digitizing Oscilloscopes
070-8712-01
Please check for change information at the rear
of this manual.
First Printing: July 1993.
Instrument Serial Numbers
Each instrument manufactured by Tektronix has a serial number on a panel insert or tag, or
stamped on the chassis. The first letter in the serial number designates the country of
manufacture. The last five digits of the serial number are assigned sequentially and are unique to
each instrument. Those manufactured in the United States have six unique digits. The country of
manufacture is identified as follows:
B010000 Tektronix, Inc., Beaverton, Oregon, USA
E200000 Tektronix United Kingdom, Ltd., London
J300000 Sony/Tektronix, Japan
H700000 Tektronix Holland, NV, Heerenveen, The Netherlands
Instruments manufactured for Tektronix by external vendors outside the United States are
assigned a two digit alpha code to identify the country of manufacture (e.g., JP for Japan, HK for
Hong Kong, IL for Israel, etc.).
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
Printed in U.S.A.
Copyright E Tektronix, Inc., 1993. All rights reserved. Tektronix products are covered by U.S.
and foreign patents, issued and pending. The following are registered trademarks: TEKTRONIX,
TEK, TEKPROBE, and SCOPE-MOBILE.
WARRANTY
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from
the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair
the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
In order to obtain service under this warranty , Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; or c) to service a product that has been modified or
integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing
the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR
REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR
BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE
VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Welcome
This is the Performance Verification for the TDS 520A, 524A, 540A, and 544A
Oscilloscope. It contains procedures suitable for determining if the instrument
functions, was adjusted properly, and meets the performance characteristics
as warranted.
Also contained in this document are technical specifications for these oscilloscopes.
Related Manuals
The following documents are related to the use or service of the digitizing
oscilloscope.
H
The TDS 520A, 524A, 540A, & 544A User Manual (Tektronix part number
070–8710–01).
H
The TDS Family Programmer Manual (Tektronix part number
070–8709–01) describes using a computer to control the digitizing oscilloscope through the GPIB interface.
H
The TDS 520A, 524A, 540A, 544A, & 644A Reference (Tektronix part
number 070–8711–01) gives you a quick overview of how to operate your
digitizing oscilloscope.
H
The TDS 520A, 524A, 540A, & 544A Service Manual (Tektronix part
number 070–8713–01) provides information for maintaining and servicing
your digitizing oscilloscope to the module level.
TDS 520A, 524A, 540A, & 544A Performance Verification
i
Welcome
ii
Welcome
Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedures
Brief Procedures 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Instructions 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Tests 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify Internal Adjustment, Self Compensation, and
Diagnostics 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Tests 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify All Input Channels 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Time Base 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Main and Delayed Trigger Systems 1-10. . . . . . . . . . . . .
Verify the File System (Optional on TDS 520A and 540A) 1-12. . .
Performance Tests 1-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 1-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 1-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Record 1-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Acquisition System Checks 1-23. . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy of Offset (Zero Setting) 1-23. . . . . . . . . . . . . . . . . .
Check DC Gain and Voltage Measurement Accuracy 1-25. . . . . .
Check Analog Bandwidth 1-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Delay Between Channels 1-36. . . . . . . . . . . . . . . . . . . . . . . .
Time Base System Checks 1-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy for Long-Term Sample Rate, Delay Time,
and Delta Time Measurements 1-39. . . . . . . . . . . . . . . . . . . . . .
Trigger System Checks 1-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy (Time) for Pulse-Glitch or Pulse-Width
Triggering 1-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy, Trigger-level or Threshold, DC Coupled 1-45. . .
Sensitivity, Edge Trigger, DC Coupled 1-48. . . . . . . . . . . . . . . . . . . .
Output Signal Checks 1-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Outputs — CH 3 and Main and Delayed Trigger
(TDS 540A and 544A only) 1-54. . . . . . . . . . . . . . . . . . . . . . . . .
Check Probe Compensator Outputs 1-57. . . . . . . . . . . . . . . . . . . . .
Option 05 Video Trigger Checks 1-61. . . . . . . . . . . . . . . . . . . . . . . . . .
Check Video Trigger 1-61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents
TDS 520A, 524A, 540A, & 544A Performance Verification
iii
Table of Contents
Specifications
Specifications 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Product Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menus 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicators 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Knob 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GUI 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Acquisition System 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal System 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger System 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition Control 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-Board User Assistance 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Help 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autoset 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Assistance 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cursor 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measure 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Signal Processing (DSP) 2-7. . . . . . . . . . . . . . . . . . . . . . . . .
Storage and I/O 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Zoom 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Traits 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T ypical Characteristics 2-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
i
Contents
Safety Summary
Please take a moment to review these safety precautions. They are provided
for your protection and to prevent damage to the digitizing oscilloscope. This
safety information applies to all operators and service personnel.
Symbols and Terms
These two terms appear in manuals:
H
statements identify conditions or practices that could result in
damage to the equipment or other property.
H
statements identify conditions or practices that could result in
personal injury or loss of life.
These two terms appear on equipment:
CAUTION
H
indicates a personal injury hazard not immediately accessible
as one reads the marking, or a hazard to property including the equipment itself.
H
DANGER
indicates a personal injury hazard immediately accessible as
one reads the marking.
This symbol appears in manuals:
These symbols appear on equipment:
TDS 620A, 640A, & 644A Performance Verification
DANGER
High Voltage
Static-Sensitive Devices
Protective
ground (earth)
terminal
ATTENTION
Refer to
manual
v
Safety Summary
Specific Precautions
Observe all of these precautions to ensure your personal safety and to prevent damage to either the digitizing oscilloscope or equipment connected to it.
Power Source
The digitizing oscilloscope is intended to operate from a power source that will
not apply more than 250 V
either supply conductor and ground. A protective ground connection, through
the grounding conductor in the power cord, is essential for safe system
operation.
between the supply conductors or between
RMS
Grounding the Digitizing Oscilloscope
The digitizing oscilloscope is grounded through the power cord. To avoid
electric shock, plug the power cord into a properly wired receptacle where
earth ground has been verified by a qualified service person. Do this before
making connections to the input or output terminals of the digitizing oscilloscope.
Without the protective ground connection, all parts of the digitizing oscilloscope are potential shock hazards. This includes knobs and controls that may
appear to be insulators.
Use the Proper Power Cord
Use only the power cord and connector specified for your product. Use only a
power cord that is in good condition.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified in the parts list for your
product, matched by type, voltage rating, and current rating.
Do Not Remove Covers or Panels
To avoid personal injury, do not operate the digitizing oscilloscope without the
panels or covers.
Electric Overload
Never apply to a connector on the digitizing oscilloscope a voltage that is
outside the range specified for that connector.
Do Not Operate in Explosive Atmospheres
The digitizing oscilloscope provides no explosion protection from static discharges or arcing components. Do not operate the digitizing oscilloscope in
an atmosphere of explosive gases.
vi
Safety
Performance Verification
Procedures
Brief Procedures
The
Self Tests
adjustment. No test equipment is required to do these test procedures.
use internal routines to confirm basic functionality and proper
General Instructions
Functional Tests
The
as a test-signal source for further verifying that the oscilloscope functions
properly. A standard-accessory probe, included with this oscilloscope, is the
only equipment required.
Besides the
oscilloscope performance includes the
section. You may not need to perform all of these procedures, depending on
what you want to accomplish:
H
To rapidly confirm that this oscilloscope functions and was adjusted
properly, just do the procedures under
page 1-4.
Advantages: These procedures are quick to do, require no external
equipment or signal sources, and perform extensive functional and accuracy testing to provide high confidence that the oscilloscope will perform
properly. They can be used as a quick check before making a series of
important measurements.
H
To further check functionality, first do the
do the procedures under
Brief Procedures,
utilize the probe-compensation output at the front panel
the set of procedures that can be used to verify
Performance Tests,
Self Tests
Functional Tests
Self Tests
that begin on page 1-6.
found later in this
, which begin on
just mentioned; then
Advantages: These procedures require minimal additional time to perform, require no additional equipment other than a standard-accessory
probe, and more completely test the internal hardware of this oscilloscope. They can be used to quickly determine if the oscilloscope is
suitable for putting into service, such as when it is first received.
H
If more extensive confirmation of performance is desired, do the
ance Tests
Tests
Advantages: These procedures add direct checking of warranted specifications. They require more time to perform and suitable test equipment is
required. (See
If you are not familiar with operating this oscilloscope, read the TDS 520A,
524A, 540A, 544A, & 644A Reference or the TDS 520A, 524A, 540A, & 544A
User manual. These contain instructions that acquaint you with the use of the
front-panel controls and the menu system.
TDS 520A, 524A, 540A, & 544A Performance Verification
, beginning on page 1-15, after doing the
just referenced.
Equipment Required
on page 1-15.)
Functional
Perform-
and
Self
1Ć1
Brief Procedures
Conventions
Throughout these procedures the following conventions apply:
H
Each test procedure uses the following general format:
Title of Test
Equipment Required
Prerequisites
Procedure
H
Each procedure consists of as many steps, substeps, and subparts as
required to do the test. Steps, substeps, and subparts are sequenced as
follows:
1. First Step
a. First Substep
H
First Subpart
H
Second Subpart
b. Second Substep
2. Second Step
H
In steps and substeps, the lead-in statement in italics instructs you what
to do, while the instructions that follow tell you how to do it: in the example step below,
SETUP. Now, press the main-menu button...”.
“Initialize the oscilloscope”
by doing “Press save/recall
Initialize the oscilloscope:
main-menu button Recall Factory Setup; then the side-menu button
OK Confirm Factory Init.
H
Where instructed to use a front-panel button or knob, or select from a
main or side menu, or verify a readout or status message, the name of
the button or knob appears in boldface type: “press SHIFT; then AC-
QUIRE MENU”, “press the main-menu button Coupling”, or “verify that
the status message is
The symbol at the left is accompanied by information you must read
to do the procedure properly.
Pass
Press save/recall SETUP. Now, press the
.
1Ć2
Performance Verification Procedures
Brief Status
Information
Graticule and Waveforms
Waveform Reference
Symbols: Ground Levels
and Waveform Sources
Vertical Scale,
Horizontal Scale, and
Trigger Level Readouts
Brief Procedures
H
Refer to Figure 1-1: “Main menu” refers to the menu that labels the seven
menu buttons under the display; “side menu” refers to the menu that
labels the five buttons to the right of the display. “Pop-up menu” refers to
a menu that pops up when a main-menu button is pressed.
Position of Waveform
Record Relative to
the Screen and Display
General Purpose
Knob Readout
Pop-up Menu
Side menu area.
Readouts for
measurements
move here when
CLEAR MENU is
pressed.
Main menu display area. Readouts in
lower graticule area move here when
CLEAR MENU is pressed.
Figure 1-1: Map of Display Functions
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć3
Brief Procedures
Self Tests
This procedure uses internal routines to verify that this oscilloscope functions
and was adjusted properly. No test equipment or hookups are required.
Verify Internal Adjustment, Self Compensation, and
Diagnostics
Equipment Required: None.
Prerequisites:
warm-up before doing this procedure.
Procedure:
Verify that internal diagnostics pass:
1.
passing of internal diagnostics.
Display the System diagnostics menu:
a.
H
H
Run the System Diagnostics:
b.
then press the side-menu button OK Confirm Run Test.
Wait:
c.
oscilloscope function. This verification will take up to two minutes. At
some time during the wait, a “clock” icon (shown at left) will appear
on-screen. When the verification is finished, the resulting status will
appear on the screen.
Power on the Digitizing Oscilloscope and allow a 20 minute
Do the following substeps to verify
Press SHIFT; then press UTILITY.
Repeatedly press the main-menu button System until Diag/Err is
highlighted in the pop-up menu.
Press the main-menu button Execute;
The internal diagnostics do an exhaustive verification of proper
Confirm no failures are found:
d.
reported on-screen.
Confirm the three adjustment sections have passed status:
e.
H
Press SHIFT; then press UTILITY.
H
Press the main menu button System until Cal is highlighted in
the pop-up menu.
H
Verify that the word
following menu labels: Voltage Reference, Frequency Re-
sponse, and Pulse Trigger. (See Figure 1-2.)
Verify that no failures are found and
Pass
appears in the main menu under the
1Ć4
Performance Verification Procedures
First, the CAL menu is displayed.
Second, the adjustment
sections are verified.
Brief Procedures
compensation is run and is
Third, a signal path
verified.
Figure 1-2: Verifying Adjustments and Signal-Path Compensation
When doing steps f and g, do not turn off the oscilloscope until signalpath compensation completes. If you interrupt (or lose) power to the
instrument while signal-path compensation is running, a message is
logged in the oscilloscope error log. If such a case occurs, rerun
signal-path compensation.
Run the signal-path compensation:
f.
Press the main-menu button
Signal Path; then press the side-menu button OK Compensate
Signal Paths.
Wait:
g.
Signal-path compensation runs in about one to two minutes.
While it progresses, a “clock” icon (shown at left) is displayed onscreen. When compensation completes, the status message will be
Pass
or
Fail
updated to
in the main menu (see step h).
Confirm signal-path compensation returns passed status:
h.
Pass
word
Figure 1-2.)
Return to regular service:
2.
nus.
TDS 520A, 524A, 540A, & 544A Performance Verification
Verify the
appears under Signal Path in the main menu. (See
Press CLEAR MENU to exit the system me-
1Ć5
Brief Procedures
Functional Tests
The purpose of these procedures is to confirm that this oscilloscope functions
properly. The only equipment required is one of the standard-accessory
probes and, to check the file system, a 3.5 inch. 720 K or 1.44 Mbyte floppy
disk.
These procedures verify functions; that is, they verify that oscilloscope features
limits.
Therefore, when the instructions in the functional tests that follow call
for you to verify that a signal appears on-screen “that is about five
divisions in amplitude” or “has a period of about six horizontal divisions”, etc., do
within limits is checked in
page 1-15.
DO NOT make changes to the front-panel settings that are not called
out in the procedures. Each verification procedure will require you to
set the oscilloscope to certain default settings before verifying functions. If you make changes to these settings, other than those called
out in the procedure, you may obtain invalid results. In this case, just
redo the procedure from step 1.
When you are instructed to press a menu button, the button may
already be selected (its label will be highlighted). If this is the case, it
is not necessary to press the button.
operate
NOT
. They do
interpret the quantities given as limits. Operation
Performance Tests
not
verify that they operate within
, which begin on
Verify All Input Channels
Equipment Required: One P6139A probe.
Prerequisites:
Procedure:
Install the test hookup and preset the oscilloscope controls:
1.
Hook up the signal source:
a.
probe tip to PROBE COMPENSA TION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSA TION GND.
None.
Figure 1-3: Universal Test Hookup for Functional Tests
Install the probe on CH 1. Connect the
1Ć6
Performance Verification Procedures
b.
Initialize the oscilloscope:
H
Press save/recall SETUP.
H
Press the main-menu button Recall Factory Setup.
H
Press the side-menu button OK Confirm Factory Init.
2.
Verify that all input channels operate:
CH 1 first,
skipping substep a since CH 1 is already set up for verification
from step 1.
a.
Select an unverified channel:
H
Press WAVEFORM OFF to remove from display the channel just
verified.
H
Press the front-panel button that corresponds to the channel you
are to verify.
H
Move the probe to the channel you selected.
Set up the selected channel:
b.
H
Press AUTOSET to obtain a viewable, triggered display in the
selected channel.
Brief Procedures
Do the following substeps — test
H
Set the horizontal SCALE to 200 ms. Press CLEAR MENU to
remove any menu that may be on the screen.
Verify that the channel is operational:
c.
Confirm that the following
statements are true.
H
The vertical scale readout for the channel under test shows a
setting of 200 mV, and a square-wave probe-compensation signal
about 2.5 divisions in amplitude is on-screen. (See Figure 1-1 on
page 1-3 to locate the readout.)
H
The vertical POSITION knob moves the signal up and down the
screen when rotated.
H
Turning the vertical SCALE knob counterclockwise decreases the
amplitude of the waveform on-screen, turning the knob clockwise
increases the amplitude, and returning the knob to 200 mV
returns the amplitude to about 2.5 divisions.
Verify that the channel acquires in all acquisition modes:
d.
Press
SHIFT; then press ACQUIRE MENU. Use the side menu to select, in
turn, each of the five hardware acquire modes and confirm that the
following statements are true. Refer to the icons at the left of each
statement as you confirm those statements.
H
Sample mode displays an actively acquiring waveform onscreen. (Note that there is noise present on the peaks of the
square wave.)
H
Peak Detect mode displays an actively acquiring waveform
on-screen with the noise present in Sample mode “peak detected.”
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć7
Brief Procedures
H
Hi Res mode displays an actively acquiring waveform on-screen
with the noise that was present in Sample mode reduced.
H
Envelope mode displays an actively acquiring waveform onscreen with the noise displayed.
H
Average mode displays an actively acquiring waveform onscreen with the noise reduced like in Hi Res mode.
TDS 520A and 524A only: Substep e will have you repeat the previous substeps to check all input channels. Be sure to check only CH
1 and CH 2 when testing the TDS 520A or 524A. (Step 3 will test the
AUX 1 and AUX 2 inputs.) When testing the TDS 540A or 544A, test
all four channels, CH 1 through CH 4.)
Test all channels:
e.
Repeat substeps a through d until all four input
channels are verified.
TDS 520A and 524A Only: Verify auxiliary inputs operate:
3.
Perform the
following substeps when checking the AUX 1 and AUX 2 inputs only.
Select an auxiliary channel:
a.
H
Press WAVEFORM OFF to remove from display the channel just
verified.
H
Press the front-panel button that corresponds to the channel you
are to verify.
H
Move probe to the channel you selected.
Set up the selected channel:
b.
Press AUTOSET to obtain a viewable
display in the selected channel.
The display obtained might not trigger stably because autoset cannot
provide more than about
amplitude in an auxiliary channel equipped with a 10X probe. This
amount is less than the minimum trigger sensitivity for auxiliary
channel trigger sources; therefore, triggering is not required.
Verify that the channel is operational:
c.
Confirm that the following
statements are true.
signal
1Ć8
H
The vertical scale readout for the channel under test shows a
setting of 1 V, and a square-wave probe-compensation signal
about
page 1-3 to locate the readout.)
H
The vertical POSITION knob moves the signal up and down the
screen when rotated.
H
Turning the vertical SCALE knob counterclockwise to 10 V
decreases the amplitude of the waveform on-screen. (The amplitude will drop to near zero when doing this substep.)
H
Returning the knob to 1 V returns the amplitude to about
sion.
Verify that the channel acquires in all acquisition modes:
d.
the probe ground lead from the probe-compensation terminal. Do
step 2, substep d to verify the five acquire modes.
Performance Verification Procedures
on
divi-
Disconnect
e.
Test all channels:
Brief Procedures
Repeat substeps a through d to verify AUX 2.
Remove the test hookup:
4.
and the probe-compensation terminals.
Disconnect the probe from the channel input
Verify the Time Base
Equipment Required: One P6139A probe.
Prerequisites:
Procedure:
Install the test hookup and preset the oscilloscope controls:
1.
a.
Hook up the signal source:
probe tip to PROBE COMPENSA TION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSA TION GND. (See
Figure 1-3 on page 1-6.)
Initialize the oscilloscope:
b.
H
H
Modify default settings:
c.
None.
Install the probe on CH 1. Connect the
Press save/recall SETUP.
Press the main-menu button Recall Factory Setup; then press
the side-menu button OK Confirm Factory Init.
H
Press AUTOSET to obtain a viewable, triggered display.
H
Set the horizontal SCALE to 200 ms.
H
Press CLEAR MENU to remove the menus from the screen.
Verify that the time base operates:
2.
a. One period of the square-wave probe-compensation signal is about
five horizontal divisions on-screen for the 200 ms horizontal scale
setting (set in step 1c).
b. Rotating the horizontal SCALE knob clockwise expands the wave-
form on-screen (more horizontal divisions per waveform period), and
that counterclockwise rotation contracts it, and that returning the
horizontal scale to 200 ms returns the period to about five divisions.
c. The horizontal POSITION knob positions the signal left and right
on-screen when rotated.
Remove the test hookup:
3.
and the probe-compensation terminals.
Disconnect the probe from the channel input
Confirm the following statements.
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć9
Brief Procedures
Verify the Main and Delayed Trigger Systems
Equipment Required: One P6139A probe.
Prerequisites:
Procedure:
Install the test hookup and preset the oscilloscope controls:
1.
a.
Hook up the signal source:
probe tip to PROBE COMPENSA TION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSA TION GND. (See
Figure 1-3 on page 1-6.)
Initialize the oscilloscope:
b.
H
H
H
Modify default settings:
c.
None.
Install the probe on CH 1. Connect the
Press save/recall SETUP.
Press the main-menu button Recall Factory Setup.
Press the side-menu button OK Confirm Factory Init.
H
Press AUTOSET to obtain a viewable, triggered display.
H
Set the horizontal SCALE for the M (main) time base to 200 ms.
H
Press TRIGGER MENU.
H
Press the main-menu button Mode & Holdoff.
H
Press the side-menu button Normal.
H
Press CLEAR MENU to remove the menus from the screen.
Verify that the main trigger system operates:
2.
statements are true.
H
The trigger level readout for the main trigger system changes with
the trigger LEVEL knob.
H
The trigger-level knob can trigger and untrigger the square-wave
signal as you rotate it. (Leave the signal
H
Pressing SET LEVEL TO 50% triggers the signal that you just
left untriggered. (Leave the signal triggered.)
Verify that the delayed trigger system operates:
3.
a.
Select the delayed time base:
Confirm that the following
un
triggered.)
1Ć10
H
Press HORIZONTAL MENU.
H
Press the main-menu button Time Base.
H
Press the side-menu button Delayed Triggerable; then press the
side-menu button Delayed Only.
H
Set the horizontal SCALE for the D (delayed) time base to
200 ms.
Performance Verification Procedures
b.
Select the delayed trigger level menu:
H
Press SHIFT; then press DELAYED TRIG.
H
Press the main-menu button Level; then press the side-menu
button Level.
Brief Procedures
Confirm that the following statements are tru
c.
H
The trigger-level readout for the delayed trigger system changes
as you turn the general purpose knob.
H
The general purpose knob can trigger and untrigger the squarewave probe-compensation signal as you rotate it. (Leave the
un
signal
H
Pressing the side-menu button Set to 50% triggers the probe-
triggered.)
compensation signal that you just left untriggered. (Leave the
signal triggered.)
Verify the delayed trigger counter:
d.
H
Press the main-menu button Delay by
H
Use the keypad to enter a delay time of 1 second (press 1 then
press ENTER).
H
Verify that the trigger READY indicator on the front panel flashes
about once every second as the waveform is updated on-screen.
Remove the test hookup:
4.
Disconnect the standard-accessory probe from
the channel input and the probe-compensation terminals.
e:
Time
.
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć11
Brief Procedures
Verify the File System (Optional on TDS 520A and 540A)
Equipment Required: One P6139A probe and one 720 K or 1.44 Mbyte, 3.5
inch DOS compatible disk. You can use a disk of your own or you can use the
Programming Examples Software 3.5 inch disk (Tektronix part number
063–1134–00) contained in the TDS Family Programmer Manual (Tektronix
part number 070–8709–01).
Prerequisites:
Procedure:
1.
Install the test hookup and preset the oscilloscope controls:
a.
Hook up the signal source:
probe tip to PROBE COMPENSA TION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSA TION GND. (See
Figure 1-3 on page 1-6.)
None.
Install the probe on CH 1. Connect the
Insert the test disk:
b.
monitor.
H
Position the disk so the metal shutter faces the drive.
H
Position the disk so the stamped arrow is on the top right side. In
other words, place the angled corner in the front bottom location.
H
Push the disk into the drive until it goes all the way in and clicks
into place.
Initialize the oscilloscope:
c.
H
Press save/recall SETUP.
H
Press the main-menu button Recall Factory Setup.
H
Press the side-menu button OK Confirm Factory Init.
Modify default settings:
d.
H
Press AUTOSET to obtain a viewable, triggered display.
H
Set the horizontal SCALE for the M (main) time base to 200 ms
(one click clockwise). Notice the waveform on the display now
shows two cycles instead of five.
H
Press CLEAR MENU to remove the menus from the screen.
Save the settings:
e.
Insert the disk in the disk drive to the left of the
1Ć12
H
Press SETUP.
H
Press the main-menu button Save Current Setup; then press the
side-menu button To File.
H
Turn the general purpose knob to select the file to save. Choose
TEK?????.SET (or fdo:). With this choice, you’ll save a file
starting with TEK, then containing 5-numbers, and a .SET extension. For example, the first time you run this on a blank, formatted disk or on the Example Programs Disk, the TDS will
assign the name TEK00000.SET to your file. If you ran the
procedure again, the TDS would increment the name and call the
file TEK00001.SET.
Performance Verification Procedures
H
Press the side-menu button Save To Selected File.
Verify the file system works:
2.
H
Press AUTOSET to restore the 500 ms time base and the five
cycle waveform.
H
Press the main-menu button Recall Saved Setup; then press the
side-menu button From File.
H
Turn the general purpose knob to select the file to recall. For
example, if you followed the instructions above and used a blank
disk, you had the TDS assign the name TEK00000.SET to your
file.
H
Press the side-menu button Recall From Selected File.
H
Verify that Digitizing Oscilloscope retrieved the saved setup from
the disk. Do this by noticing the horizontal SCALE for the M
(main) time base is again 200 ms and the waveform shows only
two cycles just as it was when you saved the setup.
Remove the test hookup:
3.
Brief Procedures
H
Disconnect the standard-accessory probe from the channel input
and the probe-compensation terminals.
H
Remove the disk from the disk drive. Do this by pushing in the
tab at the bottom of the disk drive.
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć13
Brief Procedures
1Ć14
Performance Verification Procedures
Performance Tests
This subsection contains a collection of procedures for checking that TDS
520A, 524A, 540A, and 544A Digitizing Oscilloscopes perform as warranted.
Since the procedures cover models with both two full-featured channels (TDS
520A and 524A) and four full-featured models (TDS 540A and 544A),
instructions that apply only to one of the model types are clearly identified.
Otherwise, all test instructions apply to both the two and four channel models.
The procedures are arranged in four logical groupings:
s,
System Check
utput Ports Checks
O
as checked in Section 2,
appear in boldface type under
These procedures
procedures described on page 1-1. The basic procedures should be
done first, then these procedures performed if desired.
Time Base System Checks, Triggering System Checks
. They check all the characteristics that are designated
Specifications.
Warranted Characteristics
extend
(The characteristics that are checked
the confidence level provided by the basic
Signal Acquisition
in Section 2.)
Prerequisites
The tests in this subsection comprise an extensive, valid confirmation of
performance and functionality when the following requirements are met:
H
The cabinet must be installed on the Digitizing Oscilloscope.
H
You must have performed and passed the procedures under
found on page 1-4, and those under
H
A signal-path compensation must have been done within the recommended calibration interval and at a temperature within
present operating temperature. (If at the time you did the prerequisite
the temperature was within the limits just stated, consider this
Tests,
prerequisite met.)
Functional Tests,
Self Tests,
found on page 1-6.
_
C of the
, and
Self
H
The Digitizing Oscilloscope must have been last adjusted at an ambient
temperature between +20_C and +30_C, must have been operating for
a warm-up period of at least 20 minutes, and must be operating at an
ambient temperature between +4_C and +50_C. (The warm-up requirement is usually met in the course of meeting the first prerequisite listed
above.)
Related Information — Read
start on page 1-1.
Equipment Required
These procedures use external, traceable signal sources to directly check
warranted characteristics. The required equipment list is shown in Table 1-1.
TDS 520A, 524A, 540A, & 544A Performance Verification
General Instructions
and
Conventions
that
1Ć15
Performance Tests
Table 1-1: Test Equipment
Item Number and
Minimum Requirements Example Purpose
Description
1 Attenuator,10X
(three required)
Ratio: 10X; impedance 50 ;
connectors: female BNC input,
male BNC output
2 Attenuator, 5X Ratio: 5X; impedance 50 ;
connectors: female BNC input,
male BNC output
3 Terminator, 50 Impedance 50 ; connectors:
female BNC input, male BNC
output
4 Cable, Precision
50 Coaxial
50 , 36 inch, male to male
BNC connectors
(two required)
5 Connector, Dual-
Female BNC to dual banana Tektronix part number
Banana (two
required)
6 Connector, BNC
Male BNC to dual female BNC Tektronix part number
“T”
7 Coupler, Dual-
Input
Female BNC to dual male
BNC
Tektronix part number
011–0059–02
Tektronix part number
011–0060–02
Tektronix part number
011–0049–01
Tektronix part number
012–0482–00
103–0090–00
103–0030–00
Tektronix part number
067–0525–02
Signal Attenuation
Signal Attenuation
Signal Termination
for Channel Delay
Test
Signal Interconnection
Various Accuracy
Tests
Checking Trigger
Sensitivity
Checking Delay
Between Channels
8 Generator, DC
Calibration
9 Generator, Cali-
bration
10 Generator, Lev-
eled Sine Wave,
Medium-Frequency
11 Generator, Lev-
eled Sine Wave,
High-Frequency
12 Generator, Time
Mark
13 Generator, Cali-
bration
Variable amplitude to 10 V;
accuracy to 0.1%
500 mV square wave calibra-
tor amplitude; accuracy to
0.25%
200 kHz to 250 MHz; Variable
amplitude from 5 mV to
5.5 V
into 50
p-p
250 MHz to 500 MHz; Variable
amplitude from 500 mV to
V
into 50 ; 6 MHz
4
p-p
reference
Variable marker frequency
from 10 ms to 10 ns; accuracy
within 2 ppm
500 mV square wave calibra-
tor amplitude; accuracy to
0.25%
Data Precision 8200, with
1 kV option installed
PG 506A
1
Tektronix SG 503 Leveled Sine
Wave Generator
1
Tektronix SG 504 Leveled Sine
1
Wave Generator
with its Level-
ing Head
Tektronix TG 501 Time
Mark Generator
PG 506A
1
1
Checking DC Offset,
Gain, and Measurement Accuracy
To check accuracy
of the CH 3 Signal
Out (TDS 540A and
544A only)
Checking Trigger
Sensitivity at low frequencies
Checking Analog
Bandwidth and Trigger Sensitivity at
high frequencies
Checking SampleRate and Delay-time
Accuracy
Use to check accuracy of the CH 3
Output
1 Requires a TM 500 or TM 5000 Series Power Module Mainframe.
1Ć16
Performance Verification Procedures
Table 1-1: Test Equipment (Cont.)
Performance Tests
Item Number and
Description
14 Probe, 10X, in-
cluded with this
instrument
15 Adapter, BNC
female to Clip
Leads
16 Power Supply ,
Dual Output
17 3.5 inch, 720 K
or 1.44 Mbyte,
DOS-compatible
floppy disk
18 Generator,
Video Signal
19 Oscillator, Lev-
eled Sinewave
Generator
PurposeExampleMinimum Requirements
A P6139A probe Tektronix number P6139A Signal Interconnec-
tion
BNC female to Clip Leads Tektronix part number
013–0076–00
Signal Coupling for
Probe Compensator
Output Check
0–35 V and 60 V 2 A; current
limit without foldback
Tektronix PS 280 Power Supply Power Supply
Troubleshooting
Programming Examples Software Disk (Tektronix part number 063–1134–00) that comes
Checking File System Basic Function-
ality
with the TDS Family Programmer Manual (Tektronix part
number 070–8709–01)
Provides NTSC compatible
outputs.
Tektronix TSG 121 Used to Test Video
Option 05 Equipped
Instruments Only
60 Hz. Sine Wave Tektronix part number SG 502 Used to Test Video
Option 05 Equipped
Instruments Only
20 Pulse Generator Tektronix part number PG 502 Used to Test Video
Option 05 Equipped
Instruments Only
21 Cable, 75
Coaxial
W
75 W, 36 inch, male to male
BNC connectors
Tektronix part number
012–1338–00
Used to Test Video
Option 05 Equipped
Instruments Only
22 Termination,
75
W
Impedance 75 W; connectors:
female BNC input, male BNC
output
Tektronix part number
011–0102–01
Used to Test Video
Option 05 Equipped
Instruments Only
TDS 520A, 524A, 540A, & 544A Performance Verification
1Ć17
Performance Tests
1Ć18
Performance Verification Procedures
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