Tektronix TDS 820 User manual

Performance Verification
TDS 820
Digitizing Oscilloscope
070-8696-00
Please check for change information at the
rear of this manual.
First Printing: February 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, EXPRESSED 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.

TDS 820 Performance Verification
i
Preface
This is the Performance Verification for the TDS 820 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 is a copy of the
Specification found in Appen-
dix B of the
TDS 820 User Manual . It is included here as a convenient refer-
ence.
The following documents are related to the use or service of the digitizing
oscilloscope.
H The
TDS 820 User Manual .
H The
TDS 800 Series Family Programmer Manual describes using a
computer to control the digitizing oscilloscope through the GPIB interface.
H The
TDS 820 Reference gives you a quick overview of how to operate
your digitizing oscilloscope.
H The
TDS 820 Service Manual provides information for maintaining and
servicing your digitizing oscilloscope to the module level.
H The
TDS Family Option 2F Instruction Manual describes use of the
Advanced DSP Math option (for TDS oscilloscopes equipped with that
option only).
H The
TDS Family Option 13 Instruction Manual describes using the option-
al Centronic TDS
oscilloscopes equipped with that option only).
Related Manuals

Preface
ii

TDS 820 Performance Verification
iii
Contents
Safety v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Procedures
Brief Procedures 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Instructions 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Tests 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify Internal Adjustment, Self Compensation, and
Diagnostics 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Tests 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify All Input Channels 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Time Base 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Trigger System 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Tests 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Record 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Acquisition System Checks 1-17. . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy of Net Offset 1-17. . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Voltage Measurement Accuracy 1-21. . . . . . . . . . . . . . . . . . .
Check Rise Time 1-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Input Resistance 1-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Base System Checks 1-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy of Delta Time Measurement Between
Channels 1-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy of Single Channel Delta Time
Measurements 1-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger System Checks 1-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy, Trigger-Level 1-42. . . . . . . . . . . . . . . . . . . . . . . . . .
Sensitivity, Trigger, External, CH 1, and CH 2 1-45. . . . . . . . . . . . .
Check Trigger Delay Jitter and Random Noise 1-48. . . . . . . . . . . .

Contents
i
Specifications
Product Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Traits 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Conditions 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Characteristics 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TDS 820 Performance Verification
v
Safety
Please take a moment to review these safety precautions. They are for your
protection and to prevent damage to the digitizing oscilloscope. This safety
information applies to all operators and service personnel.
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:
H
CAUTION indicates a personal injury hazard not immediately accessible
as one reads the marking, or a hazard to property including the equip-
ment itself.
H
DANGER indicates a personal injury hazard immediately accessible as
one reads the marking.
This symbol appears in manuals:
Static-Sensitive Devices
These symbols appear on equipment:
DANGER
High Voltage Protective ground (earth)
terminal
ATTENTION
Refer to
manual
Symbols and Terms

Safety
vi
Observe all of these precautions to ensure your personal safety and to pre-
vent damage to either the digitizing oscilloscope or equipment connected to it.
Power Source
The digitizing oscilloscope operates from a power source that will not apply
more than 250 Vrms between the supply conductors or between either supply
conductor and ground. A protective ground connection, through the grounding
conductor in the power cord, is essential for safe system operation.
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 oscillo-
scope.
Without the protective ground connection, all parts of the digitizing oscillo-
scope 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.
Take Antistatic Precautions
Wear an antistatic grounding wrist strap when working with the input connec-
tors on the digitizing oscilloscope.
Electric Overload
Never apply to a connector on the digitizing oscilloscope a voltage that is
outside the range specified for that connector.
Specific Precautions