The servicing instructions are for use by
qualified personnel only. To avoid personal
injury, do not perform any servicing unless you
are qualified to do so. Refer to the Safety
Summary prior to performing service.
Copyright T ektronix, Inc. All rights reserved.
T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
FlexFormat and KlipChip are trademarks of T ektronix, Inc.
WARRANTY
T ektronix 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, T ektronix, 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 T ektronix, with shipping charges prepaid. T ektronix
shall pay for the return of the product to Customer if the shipment is to a location within the country in which the T ektronix
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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts
by personnel other than T ektronix 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 CUST OMER 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.
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or
Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Connect and Disconnect Properly . Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
TDS 500D, TDS 600B and TDS 700D Service Manual
xi
General Safety Summary
Symbols and Terms
T erms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
T erms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
WARNING
High Voltage
Protective Ground
(Earth) T erminal
CAUTION
Refer to Manual
Double
Insulated
xii
TDS 500D, TDS 600B and TDS 700D Service Manual
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, disconnect the mains power by means
of the power cord or, if provided, the power switch.
Use Caution When Servicing the CRT. To avoid electric shock or injury, use
extreme caution when handling the CRT. Only qualified personnel familiar with
CRT servicing procedures and precautions should remove or install the CRT.
CRTs retain hazardous voltages for long periods of time after power is turned off.
Before attempting any servicing, discharge the CRT by shorting the anode to
chassis ground. When discharging the CRT, connect the discharge path to ground
and then the anode. Rough handling may cause the CRT to implode. Do not nick
or scratch the glass or subject it to undue pressure when removing or installing it.
When handling the CRT, wear safety goggles and heavy gloves for protection.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the
high-voltage circuitry or the CRT enclosure. X-ray emissions generated within
this product have been sufficiently shielded.
TDS 500D, TDS 600B and TDS 700D Service Manual
xiii
Service Safety Summary
xiv
TDS 500D, TDS 600B and TDS 700D Service Manual
Preface
Manual Structure
This preface contains information needed to properly use this manual to service
the TDS 500D, TDS 600B and TDS 700D Oscilloscopes, as well as general
information critical to safe and effective servicing of this oscilloscope.
The following models are covered:
TDS 500D:TDS 520D, TDS 540D, and TDS 580D
TDS 600B:TDS 620B, TDS 644B, TDS 680B, and TDS 684B
TDS 700D:TDS 724D, TDS 754D, TDS 784D, and TDS 794D
This manual is divided into sections, such as Specifications and Theory ofOperation. Further, it is divided into subsections, such as Product Description
and Removal and Installation Procedures.
Sections containing procedures also contain introductions to those procedures. Be
sure to read these introductions because they provide information needed to do
the service correctly and efficiently. The following is a brief description of each
manual section.
HSpecifications contains a product description of the TDS 500D, TDS 600B
and TDS 700D Oscilloscopes and tables of the characteristics and descriptions that apply to it.
HOperating Information includes general information and operating instruc-
tions at the level needed to safely power on and service this oscilloscope. A
statement of the service strategy that this manual supports, and instructions
for shipment of the oscilloscopes are found in this section.
HTheory of Operation contains circuit descriptions that support general service
and fault isolation.
HPerformance Verification contains a collection of procedures for confirming
that these oscilloscopes function properly and meet warranted limits.
HAdjustment Procedures contains a collection of procedures for adjusting
these oscilloscopes to meet warranted limits.
HMaintenance contains information and procedures for doing preventive and
corrective maintenance of these oscilloscopes. Instructions for cleaning, for
TDS 500D, TDS 600B and TDS 700D Service Manual
xv
Preface
Manual Conventions
module removal and installation, and for fault isolation to a module are
found here.
HOptions contains information on servicing any of the factory-installed
options that may be present in your oscilloscope.
HElectrical Parts List contains a statement referring you to Mechanical
Replaceable Parts, where both electrical and mechanical modules are listed.
HDiagrams contains a block diagram and an interconnection diagram useful
for isolating failed modules.
HMechanical Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.
This manual uses certain conventions which you should become familiar with
before doing service.
Modules
Channels
Safety
Symbols
Throughout this manual, any replaceable component, assembly, or part of these
oscilloscopes is referred to generically as a module. In general, a module is an
assembly, like a circuit board, rather than a component, like a resistor or an
integrated circuit. Sometimes a single component is a module; for example, each
chassis part of the oscilloscope is a module.
Some TDS models have two auxiliary channels called AUX 1 and AUX 2,
instead of CH 3 and CH 4. References to these channels default to CH 3 and
CH 4. If your oscilloscope is one of models TDS 520D, TDS 620B, TDS 680B,
or TDS 724D, read AUX 1 and AUX 2 respectively for all references to CH 3
and CH 4 in this manual.
Symbols and terms related to safety appear in the Safety Summary found at the
beginning of this manual.
Besides the symbols related to safety, this manual uses the following symbols:
STOP. The stop labels information which must be read in order to correctly do
service and to avoid incorrectly using or applying service procedures.
xvi
The clock icon labels procedure steps which require a pause to wait for
the oscilloscope to complete some operation before you can continue.
TDS 500D, TDS 600B and TDS 700D Service Manual
Related Manuals
Preface
Various icons such as the example icon at the left are used in procedures
to help identify certain readouts and menu functions on screen.
The TDS 500D, TDS 600B and TDS 700D Oscilloscopes come with the
following manuals:
TDS 500D, TDS 600B & TDS700D User Manual (Tektronix part number
071-0130-XX) contains a tutorial to quickly show you how to operate the
TDS 500D, TDS 600B and TDS 700D Oscilloscopes and an in depth discussion
of how to more completely use their features. Applications are also discussed.
TDS 500D, TDS 600B & TDS 700D Reference (Tektronix part number
071-0137-XX) contains a brief overview of oscilloscope operation.
TDS Family (500D, 600B, and 700D) Programmer Diskette (part of the User
Manual) contains information for programmed operation via the GPIB interface.
Included are the complete command set, setup information, and programming
examples.
TDS 500D, TDS 600B & TDS 700D Technical Reference (Tektronix part number
071-0135-XX) contains performance verification procedures and specifications.
TDS 500D, TDS 600B and TDS 700D Service Manual
xvii
Preface
Contacting Tektronix
Product
Support
Service
Support
For other
information
To write usTektronix, Inc.
For application-oriented questions about a Tektronix measurement product, call toll free in North America:
1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
6:00 a.m. – 5:00 p.m. Pacific time
Or, contact us by e-mail:
tm_app_supp@tek.com
For product support outside of North America, contact your
local Tektronix distributor or sales office.
Contact your local Tektronix distributor or sales office. Or, visit
our web site for a listing of worldwide service locations.
http://www.tek.com
In North America:
1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
P.O. Box 1000
Wilsonville, OR 97070-1000
xviii
TDS 500D, TDS 600B and TDS 700D Service Manual
Introduction
Service Strategy
STOP. Throughout this manual, any field-replaceable component, assembly, or
part of this oscilloscope is referred to generically as a module.
This manual contains all the information needed for periodic maintenance of the
TDS 500D, TDS 600B and TDS 700D Oscilloscopes. (Examples of such
information are procedures for checking performance and for readjustment.)
Further, it contains all information for corrective maintenance down to the
module level. This means that the procedures, diagrams, and other troubleshooting aids help isolate failures to a specific module, rather than to components of
that module. Once a failure is isolated, replace the module with a fresh unit
obtained from the factory.
All modules are listed in Mechanical Parts List. To isolate a failure to a module,
use the fault isolation procedures found in Section 6, Maintenance Information.
To remove and replace any failed module, follow the instructions in Removal andInstallation Procedures, also found in Section 6.
Service Offerings
Warranty Repair Service
Tektronix provides service to cover repair under warranty as well as other
services that may provide a cost-effective answer to your service needs.
Whether providing warranty repair service or any of the other services listed
below, Tektronix service technicians, trained on Tektronix products, are best
equipped to service your TDS 500D, TDS 600B and TDS 700D Oscilloscopes.
Tektronix technicians are appraised of the latest information on improvements to
the product as well as the latest new options to the product.
Tektronix warrants this product for three years from date of purchase, excluding
probes for which the warranty is one year. (The warranty appears after the title
page and copyright page in this manual.) Tektronix technicians provide warranty
service at most Tektronix service locations worldwide. Your Tektronix product
catalog lists all service locations worldwide.
TDS 500D, TDS 600B and TDS 700D Service Manual
xix
Introduction
Repair or Calibration
Service
The following services may be purchased to tailor repair and/or calibration of
your TDS 500D, TDS 600B and TDS 700D Oscilloscopes to fit your requirements.
At-Depot Service. Tektronix offers several standard-priced adjustment (calibration) and repair services:
HA single repair and/or adjustment.
HCalibrations using equipment and procedures that meet the traceability
standards specific to the local area.
HAnnual maintenance agreements that provide for either calibration and repair
or calibration only of the oscilloscope.
Of these services, the annual maintenance agreement offers a particularly
cost-effective approach to service for many owners of the TDS 500D, TDS 600B
and TDS 700D Oscilloscopes. Such agreements can be purchased to span several
years.
On-Site Service. The annual maintenance agreement can be purchased with
on-site service, with repair and calibration done at your facility. This service
reduces the time your oscilloscope is out of service when calibration or repair is
required.
Self Service
Tektronix supports repair to the module level by providing Module Exchange and
Module Repair and Return.
Module Exchange. This service reduces down time for repair by allowing you to
exchange most modules for remanufactured ones. Tektronix ships you an updated
and tested exchange module from the Beaverton, Oregon service center, typically
within 24 hours. Each module comes with a 90-day service warranty.
Module Repair and Return. This service returns to you within 10 days the same
module that you shipped to Tektronix. The module shipped is repaired, tested,
and returned to you from the Beaverton, Oregon service center. It is not updated
to match current modules of the same type. Again, each module comes with a
90-day service warranty.
For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of the repair or adjustment services just
described.
xx
TDS 500D, TDS 600B and TDS 700D Service Manual
Before You Begin
Introduction
This manual is for servicing the TDS 500D, TDS 600B and
TDS 700D Oscilloscopes. To prevent injury to yourself or damage to the
oscilloscope, do the following tasks before you attempt service:
HRead the Safety Summary found at the beginning of this manual.
HRead Service Strategy in this section and Supplying Operating Power in
section 2.
When using this manual for servicing, be sure to read and follow all warnings,
cautions, and notes.
TDS 500D, TDS 600B and TDS 700D Service Manual
xxi
Introduction
xxii
TDS 500D, TDS 600B and TDS 700D Service Manual
Specifications
Product Description
This section begins with a general description of the traits of the TDS 500D,
TDS 600B and TDS 700D oscilloscopes. Three sections follow, one for each of
three classes of traits: nominal traits, warranted characteristics, and typicalcharacteristics.
The TDS 500D, TDS 600B and TDS 700D oscilloscopes are portable, four-channel instruments suitable for use in a variety of test and measurement applications
and systems. Table 1–1 lists key features.
T able 1–1: Key features of the TDS 500D, 600B and 700D oscilloscopes
FeatureTDS 600BTDS 500D & TDS 700D
Digitizing rate,
maximum
TDS 684B: 5 GS/s on ea. of 4 ch
TDS 680B: 5 GS/s on ea. of 2 ch
TDS 644B: 2.5 GS/s on ea. of 4 ch
TDS 620B: 2.5 GS/s on ea. of 2 ch
(500,000 with option 1M)
(8,000,000 with option 2M)
Sample, envelope, average,
high-resolution, and
peak-detect
1
TDS 500D, TDS 600B and TDS 700D Service Manual
1–1
Specifications
T able 1–1: Key features of the TDS 500D, 600B and 700D oscilloscopes (cont.)
FeatureTDS 500D & TDS 700DTDS 600B
StorageFloppy disk drive:
1.44 Mbyte, 3.5 inch, DOS 3.3-or-later floppy disk drive
Internal hard disk drive
(optional on the TDS 500D and 700D)
Iomega Zip drive compatible
NVRAM storage for saving waveforms, hardcopies, and setups
I/OFull GPIB programmability .
Hardcopy output using GPIB, RS-232, or Centronics ports
1
Two plus Two channel operation allows up to two of the four channels to be
displayed simultaneously. Channels not displayed can be used to couple a
triggering signal to the oscilloscope.
User Interface
Indicators
Menus
Use a combination of front-panel buttons, knobs, and on-screen menus to control
the many functions of the oscilloscope. The front-panel controls are grouped
according to function: vertical, horizontal, trigger, and special. Set a function you
adjust often, such as vertical positioning or the time base setting, directly by its
own front-panel knob. Set a function you change less often, such as vertical
coupling or horizontal mode, indirectly using a selected menu.
Pressing one (sometimes two) front-panel button(s), such as vertical menu,
displays a main menu of related functions, such as coupling and bandwidth, at
the bottom of the screen. Pressing a main-menu button, such as coupling,
displays a side menu of settings for that function, such as AC, DC, or GND
(ground) coupling, at the right side of the screen. Pressing a side-menu button
selects a setting such as DC.
On-screen readouts help you keep track of the settings for various functions,
such as vertical and horizontal scale and trigger level. Some readouts use the
cursors or the automatic parameter extraction feature (called measure) to display
the results of measurements made or the status of the instrument.
General Purpose Knob
1–2
Assign the general purpose knob to adjust a selected parameter function. More
quickly change parameters by toggling the SHIFT button. Use the same method
as for selecting a function, except the final side-menu selection assigns the
general purpose knob to adjust some function, such as the position of measurement cursors on screen, or the setting for a channel fine gain.
TDS 500D, TDS 600B and TDS 700D Service Manual
Specifications
GUI
The user interface also makes use of a GUI, or Graphical User Interface, to make
setting functions and interpreting the display more intuitive. Some menus and
status are displayed using iconic representations of function settings, such as
those shown here for full, 250 MHz and 20 MHz bandwidth. Such icons allow
you to more readily determine status or the available settings.
Signal Acquisition System
The signal acquisition system provides up to four, full-featured vertical channels
with calibrated vertical scale factors from 1 mV to 10 V per division, depending
on TDS model. All channels can be acquired simultaneously.
Each of the full-featured channels can be displayed, vertically positioned, and
offset, and their vertical coupling specified. Some models can have their
bandwidth limited (250 MHz or 20 MHz). Fine gain can also be adjusted.
Besides these channels, up to three math waveforms and four reference waveforms are available for display. (A math waveform results when you specify dual
waveform operations, such as add, on any two channels. A reference waveform
results when you save a waveform in a reference memory).
Horizontal System
There are three horizontal display modes: main only, main intensified, and
delayed only. You can select among various horizontal record length settings.
A feature called “Fit to Screen” allows you to view entire waveform records
within the 10 division screen area. Waveforms are compressed to fit on the
screen. See Table 1–2.
Both the delayed only display and the intensified zone on the main intensified
display may be delayed by time with respect to the main trigger. Both can be set
to display immediately after the delay (delayed runs after main mode). The
delayed display can also be set to display at the first valid trigger after the delay
(delayed-triggerable modes).
The delayed display (or the intensified zone) may also be delayed by a selected
number of events. In this case, the events source is the delayed-trigger source.
The delayed trigger can also be set to occur after a number of events plus an
amount of time.
TDS 500D, TDS 600B and TDS 700D Service Manual
1–3
Specifications
Standard Model
Record length
All
All c
els
4
Model
1M
Record length
T able 1–2: Record length and divisions per record vs. TDS model
TDS 540D, TDS 580D, & All TDS 700D
One or two channels
TDS 540D, TDS 580D, & All TDS 700D
One channel only
50,0001,000 divs10 divs
Divisions per record
FTS1 Off
2
FTS1 On
75,0001,500 divs10 divs
100,0002,000 divs10 divs
130,0002,600 divs10 divs
250,0005,000 divs10 divs
500,00010,000 divs10 divs
3
1–4
TDS 500D, TDS 600B and TDS 700D Service Manual
Specifications
Model
2M
Record length
T able 1–2: Record length and divisions per record vs. TDS model (cont.)
Divisions per record
s with Option
TDS 520D & TDS 724D
One or two channels
TDS 540D, TDS 580D, TDS 754D,
TDS 784D & TDS 794D
Three or four channels
FTS1 Off
2,000,00040,000 divs10 divs
2
FTS1 On
3
Trigger System
TDS 520D & TDS 724D
One channel only
TDS 540D, TDS 580D, TDS 754D,
TDS 784D & TDS 794D
Two channels
TDS 540D, TDS 754D,
TDS 784D & TDS 794D
One channel only
1
Fit to Screen setting
2
Fit to Screen off preserves 50 samples/division in a 1–2–5 sec/division sequence.
3
Fit to Screen on lets the samples/division and the sec/division sequence vary.
4
All channels means all that may be displayed at one time: four channels for some
models, two for others. See Table 1–1 and its footnote.
4,000,00080,000 divs10 divs
8,000,000160,000 divs10 divs
The triggering system supports a varied set of features for triggering the
signal-acquisition system. Trigger signals recognized include:
HEdge (main- and delayed-trigger systems): This familiar type of triggering is
fully configurable for source, slope, coupling, mode (auto or normal), and
holdoff.
HLogic (main-trigger system): This type of triggering can be based on pattern
(asynchronous) or state (synchronous). In either case, logic triggering is
configurable for sources, for Boolean operators to apply to those sources, for
logic pattern or state on which to trigger, for mode (auto or normal), and for
holdoff. Time qualification may be selected in pattern mode. Another class
of logic trigger, setup/hold, triggers when data in one trigger source changes
state within the setup and hold times that you specify relative to a clock in
another trigger source.
HPulse (main-trigger system): Pulse triggering is configurable for triggering
on runt or glitch pulses, or on pulse widths or periods inside or outside limits
TDS 500D, TDS 600B and TDS 700D Service Manual
1–5
Specifications
that you specify. It can also trigger on a pulse edge that has a slew rate faster
or slower than the rate you specify. The timeout trigger will act when events
do not occur in a defined time period. The pulse trigger is also configurable
for source, polarity, mode, and holdoff.
HVideo (with option 05: Video Trigger): Video triggering is compatible with
standard NTSC, PAL, SECAM, and HDTV formats. An additional feature
called FlexFormat
format on which to trigger.
HComm (with option 2C): is provided for triggering on AMI, CMI, or NRZ
communications signals.
You can choose where the trigger point is located within the acquired waveform
record by selecting the amount of pretrigger data displayed. Presets of 10%,
50%, and 90% of pretrigger data can be selected in the horizontal menu, or the
general purpose knob can be assigned to set pretrigger data to any value within
the 0% to 100% limits.
TM
(flexible format) allows the user to define the video
Acquisition Control
You can specify a mode and manner to acquire and process signals that matches
your measurement requirements.
HSelect the mode for interpolation (linear or sin (x)/x). This can increase the
apparent sample rate on the waveform when the maximum real-time rate is
exceeded.
HUse sample, envelope, average and peak detect modes to acquire signals.
With the Oscilloscopes, also use high-resolution mode.
HSet the acquisition to stop after a single acquisition (or sequence of
acquisitions if acquiring in average or envelope modes) or after a limit
condition has been met.
HSelect channel sources for compliance with limit tests. You can direct the
TDS to signal you or generate hard copy output either to a printer or to a
floppy-disk file based on the results. Also, you can create templates for use
in limit tests.
1–6
TDS 500D, TDS 600B and TDS 700D Service Manual
On-Board User Assistance
Help and autoset can assist you in setting up the oscilloscope to make your
measurements.
Specifications
Help
Autoset
Help displays operational information about any front-panel control. When help
mode is in effect, manipulating any front-panel control causes the oscilloscope to
display information about that control. When help is first invoked, an introduction to help is displayed on screen.
Autoset automatically sets up the oscilloscope for a viewable display based on
the input signal.
Measurement Assistance
Once you have set up to make your measurements, the cursor and measure
features can help you quickly make those measurements.
Cursor
Three types of cursors are provided for making parametric measurements on the
displayed waveforms. Horizontal bar cursors (H Bar) measure vertical parameters (typically volts). Vertical bar cursors (V Bar) measure horizontal parameters
(typically time or frequency). Paired cursors measure both amplitude and time
simultaneously. These are delta measurements; that is, measurements based on
the difference between two cursors.
Both H Bar and V Bar cursors can also be used to make absolute measurements.
For the H Bars, either cursor can be selected to read out its voltage with respect
to any channel’s ground reference level. For the V Bars, the cursors measure time
with respect to the trigger point (event) of the acquisition. The cursors can also
control the portion of the waveform on which automatic measurements are made.
For time measurements, units can be either seconds or hertz (for 1/time).
With the video trigger option installed (Option 05), you can measure the video
line number using the vertical cursors. You can measure IRE amplitude (NTSC)
using the horizontal cursors with or without the video trigger option installed.
Measure
TDS 500D, TDS 600B and TDS 700D Service Manual
Measure can automatically extract parameters from the signal input to the
oscilloscope. Any four out of the 25 parameters available can be displayed to the
screen. The waveform parameters are measured continuously with the results
updated on-screen as the oscilloscope continues to acquire waveforms.
1–7
Specifications
Digital Signal Processing
(DSP)
Storage
An important component of the multiprocessor architecture of this oscilloscope
is Tektronix’ proprietary digital signal processor, the DSP. This dedicated
processor supports advanced analysis of your waveforms when doing such
compute-intensive tasks as interpolation, waveform math, and signal averaging.
It also teams with a custom display system to deliver specialized display modes
(See Display, later in this description).
Acquired waveforms may be saved in any of four nonvolatile REF (reference)
memories or on a 3.5 inch, DOS 3.3-or-later compatible disk. Any or all of the
saved waveforms may be displayed for comparison with the waveforms being
currently acquired.
The Oscilloscopes instrument with option 2M can save waveforms to an internal
hard disk drive. Any or all of the saved waveforms may be displayed
for comparison with the waveforms being currently acquired.
The source and destination of waveforms to be saved may be chosen. You can
save any of the four channels to any REF memory or move a stored reference
from one REF memory to another. Reference waveforms may also be written
into a REF memory location via the GPIB interface.
I/O
The oscilloscope is fully controllable and capable of sending and receiving
waveforms over the GPIB interface (IEEE Std 488.1–1987/IEEE Std 488.2–1987
standard). This feature makes the instrument ideal for making automated
measurements in a production or research and development environment that
calls for repetitive data taking. Self-compensation and self-diagnostic features
built into the oscilloscope to aid in fault detection and servicing are also
accessible using commands sent from a GPIB controller.
The oscilloscope can also output copies of its display using the hardcopy feature.
This feature allows you to output waveforms and other on-screen information to
a variety of graphic printers and plotters from the TDS front panel, providing
hard copies without requiring you to put the TDS into a system-controller
environment.
You can make hardcopies in a variety of popular output formats, such as PCX,
TIFF, BMP, RLE, EPS, Interleaf, and EPS mono or color. You can also save
hardcopies in a disk file in any of the formats listed in the I/O section.
1–8
TDS 500D, TDS 600B and TDS 700D Service Manual
Display
Specifications
The hardcopies obtained are based on what is displayed on-screen at the time
hardcopy is invoked. The hardcopies can be stamped with date and time and
spooled to a queue for printing at a later time. You can output screen information
via GPIB, RS-232-C, or Centronics interfaces.
The TDS 500D, TDS 600B and TDS 700D Oscilloscopes offer flexible display
options. You can customize the following attributes of your display:
HColor (TDS 644B, TDS 684B, and TDS 700D): Waveforms, readouts,
graticule, and variable persistence with color coding
HIntensity: waveforms, readouts, and graticule
HStyle of waveform display(s): vectors or dots, intensified or nonintensified
samples, infinite persistence, and variable persistence
HInterpolation method: Sin(x)/x or Linear
Zoom
HDisplay format: xy or yt with various graticule selections including NTSC
and PAL to be used with video trigger (option 05)
This oscilloscope also provides an easy way to focus in on those waveform
features you want to examine up close. By invoking zoom, you can magnify the
waveform using the vertical and horizontal controls to expand (or contract) and
position it for viewing.
TDS 500D, TDS 600B and TDS 700D Service Manual
1–9
Specifications
1–10
TDS 500D, TDS 600B and TDS 700D Service Manual
Nominal Traits
set
All except
This section contains a collection of tables that list the various nominal traits
that describe the TDS 500D, TDS 600B, and TDS 700D oscilloscopes. Electrical
and mechanical traits are included.
Nominal traits are described using simple statements of fact such as “Four, all
identical” for the trait “Input Channels, Number of,” rather than in terms of
limits that are performance requirements.
T able 1–3: Nominal traits — Signal acquisition system
NameDescription
Bandwidth Selections20 MHz, 250 MHz, and FULL (No BW limit on TDS 794D)
Samplers, Number ofTDS 540D, 580D, 644B, 684B, 754D, 784D, and 794D: Four, simultaneous
TDS 520D, 620B, 680B, and 724D: Two, simultaneous
Digitized Bits, Number of8 bits
Input Channels, Number ofFour
Input CouplingDC, AC, or GND (TDS 794D – DC or GND only)
Input Impedance Selections
Displayed vertically with 25 digitization levels (DLs) per division and 10.24 divisions dynamic range with zoom off. A DL
is the smallest voltage level change of the oscilloscope input that can be resolved by the 8-bit A-D Converter. Expressed
as a voltage, a DL is equal to 1/25 of a division times the volts/division setting.
2
The sensitivity ranges from 1 mV/div to 10 V/div (for 1 M) or to 1 V/div (for 50 ) in a 1–2–5 sequence of coarse settings
with Fit-to-Screen off. Between coarse settings, the sensitivity can be finely adjusted with a resolution equal to 1% of the
more sensitive coarse setting. For example, between 50 mV/div and 100 mV/div, the volts/division can be set with 0.5 mV
resolution.
3
1 M not available on TDS 794D
3
1 mV/div to 10 V/div
2
±10 V
±100 V
±0.50 V
±0.25 V
±5 V
±2.5 V
TDS 500D, TDS 600B and TDS 700D Service Manual
1–11
Nominal Traits
T able 1–4: Nominal traits — Time base system
NameDescription
Range, Sample-Rate
1,3
TDS 684B: 5 Samples/sec to 5 GSamples/sec on four channels simultaneously
TDS 680B: 5 Samples/sec to 5 GSamples/sec on two channels simultaneously
TDS 644B: 5 Samples/sec to 2.5 GSamples/sec on four channels simultaneously
TDS 620B: 5 Samples/sec to 2.5 GSamples/sec on two channels simultaneously
TDS 520D, and 724D: 5 Samples/sec to 2 GSamples/sec when acquiring 1 channel,
to 1 GSample/sec when acquiring 2 channels
TDS 540D: 5 Samples/sec to 2 GSamples/sec when acquiring 1 or 2 channels,
to 1 GSample/sec when acquiring 3 or 4 channels
TDS 540D Opt. 1G: 5 Samples/sec to 1 GSample/sec when acquiring 1 to 4 channels
TDS 754D: 5 Samples/sec to 2 GSamples/sec when acquiring 1 or 2 channels,
to 1 GSample/sec when acquiring 3 or 4 channels
TDS 754D Opt 1G: 5 Samples/sec to 1 GSample/sec when acquiring 1 to 4 channels
TDS 580D, 784D, and 794D: 5 Samples/sec to 4 GSamples/sec when acquiring 1
channel, to 2 GSamples/sec when acquiring 2 channels,
or to 1 GSample/sec when acquiring 3 or 4 channels
Range, Interpolated Waveform Rate
Range, Seconds/DivisionTDS 600B: 0.2 ns/div to 10 s/div
2,3
TDS 600B: 10 GSamples/sec to 250 GSamples/sec
TDS 520D, 540D, 724D, and 754D: 1 GSample/sec to 100 GSamples/sec
TDS 580D, 784D, and 794D: 2 GSamples/sec to 250 GSamples/sec
TDS 500D, 724D, and 754D: 0.5 ns/div to 10 s/div
TDS 580D, 784D, and 794D: 0.2 ns/div to 10 s/div
1–12
TDS 500D, TDS 600B and TDS 700D Service Manual
T able 1–4: Nominal traits — Time base system (cont.)
NameDescription
Record Length SelectionTDS 500D & TDS 700D:
500, 1,000, 2,500, 5,000, 15,000 and 50,000 samples
In addition to the record lengths previously listed, the following record lengths are
The range of real-time rates, expressed in samples/second, at which a digitizer samples signals at its inputs and stores
the samples in memory to produce a record of time-sequential samples.
2
The range of waveform rates for interpolated (or equivalent-time on the TDS 700D) waveform records.
3
The Waveform Rate (WR) is the equivalent sample rate of a waveform record. For a waveform record acquired by
real-time sampling of a single acquisition, the waveform rate is the same as the real-time sample rate; for a waveform
created by interpolation of real-time samples from a single acquisition or, on applicable products, the equivalent-time
sampling of multiple acquisitions, the waveform rate created is faster than the real time sample rate. For all these cases,
the waveform rate is 1/(Waveform Interval) for the waveform record, where the waveform interval (WI) is the time between
the samples in the waveform record.
T able 1–5: Nominal traits — Triggering system
NameDescription
Range, Delayed Trigger Time Delay16 ns to 250 s
Range, Events DelayTDS 600B; 2 to 10,000,000
TDS 500D/700D: 1 to 10,000,000
Range (Time) for Pulse-Glitch,
Pulse-Width, Time-Qualified Runt, Timeout,
or Slew Rate Trigger, Delta Time
1 ns to 1 s
TDS 500D, TDS 600B and TDS 700D Service Manual
1–13
Nominal Traits
or
imeSet
iolatio
er
evel or
reshol
T able 1–5: Nominal traits — Triggering system (cont.)
NameDescription
Ranges, Setup and Hold f
T
Ranges, Trigger L
Video Trigger Modes of Operation
(Option 05 Video Trigger)
up/Hold V
n Trigg
Th
FeatureMin to max
Setup Time
Hold Time
Setup + Hold Time
For Setup Time, positive numbers mean a data transition before the clock edge and
negative means a transition after the clock edge.
For Hold Time, positive numbers mean a data transition after the clock edge and negative
means a transition before the clock edge.
Setup + Hold Time is the algebraic sum of the Setup Time and the Hold Time
programmed by the user.
dSourceRange
Any Channel
Auxiliary
Line
Supports the following video standards:
HNTSC (525/60) – 2 field mono or 4 field
HPAL (625/50) – 2 field mono or SECAM, 8 field
HHDTV –
–100 ns to 100 ns
–1 ns to 100 ns
2 ns
±12 divisions from center of screen
±8 V
±400 V
1–14
(787.5/60)
(1050/60)
(1125/60)
(1250/60)
HFlexFormat
User can specify: field rate, number of lines, sync pulse width and polarity, line rate,
and vertical interval timing.
TM
(user definable standards)
TDS 500D, TDS 600B and TDS 700D Service Manual
T able 1–5: Nominal traits — Triggering system (cont.)
NameDescription
Communication Trigger Modes of
Operation
(Option 2C Comm Trigger)
Standard NameCode
OC1/STM0NRZ51.84 Mb/s
OC3/STM1NRZ155.52 Mb/s
OC12/STM4NRZ622.08 Mb/s
DS0 SglMasks
DS0 DblMasks
DS0 Data ContraMasks
DS0 TimingMasks
E1AMI2.048 Mb/s
E2AMI8.44 Mb/s
E3AMI34.368 Mb/s
E4CMI139.26 Mb/s
E5 (CEPT)NRZ565 Mb/s
STM1ECMI155.52 Mb/s
DS1AMI1.544 Mb/s
DS1AAMI2.048 Mb/s
DS1CAMI3.152 Mb/s
DS2AMI6.312 Mb/s
DS3/DS3 RateAMI44.736 Mb/s
DS4NACMI139.26 Mb/s
STS-1AMI51.84 Mb/s
STS-3CMI155.52 Mb/s
FC133NRZ132.8 Mb/s
FC266NRZ265.6 Mb/s
FC531NRZ531.2 Mb/s
FC1063NRZ1.0625 Mb/s
D2NRZ143.18 Mb/s
D1NRZ270 Mb/s
FDDINRZ125 Mb/s
4:2:2 SMPTE 259M-DNRZ360 Mb/s
10 Base-TNRZ10 Mb/s
100 Base-TNRZ125 Mb/s
Gigabit EthernetNRZ1.25 Gb/s
Nominal Traits
1
2
2
2
2
Bit Rate
64 kb/s
64 kb/s
64 kb/s
64 kb/s
1
AMI = Alternate Mark Inversion. CMI = Code Mark Inversion. NRZ = Non-return to Zero.
2
These Telecom DS0 standards are automatically selected from the Mask Menu. The trigger uses Pulse/W idth trigger.
T able 1–6: Nominal traits — Display system
NameDescription
Video Display7 inch diagonal, with a display area of 5.04 inches horizontally by 3.78 inches vertically
TDS 520D, 540D, 580D, 620B, and 680B: Monochrome display
TDS 644B, 684B, 724D, 754D, 784D, and 794D: Color display
Video Display Resolution640 pixels horizontally by 480 pixels vertically
TDS 500D, TDS 600B and TDS 700D Service Manual
1–15
Nominal Traits
T able 1–6: Nominal traits — Display system (cont.)
NameDescription
Waveform Display GraticuleSingle Graticule: 401 × 501 pixels, 8 × 10 divisions, where divisions are 1 cm by 1 cm
Waveform Display Levels/ColorsTDS 520D, 540D, 580D, 620B, and 680B:
Sixteen levels in infinite-persistence or variable persistence display
TDS 644B, 684B, 724D, 754D, 784D, and 794D:
Sixteen colors in infinite-persistence or variable persistence display
T able 1–7: Nominal traits — GPIB interface, output ports, and power fuse
NameDescription
Interface, GPIBGPIB interface complies with IEEE Std 488-1987
Interface, RS-232RS-232 interface complies with EIA/TIA 574 (talk only)
Optional on the TDS 520D, 540D, 580D, 620B, and 680B
Interface, CentronicsCentronics interface complies with Centronics interface standard
C332-44 Feb 1977, REV A
Optional on the TDS 520D, 540D, 580D, 620B, and 680B
Interface, VideoVGA video output with levels that comply with EIA RS 343A standard. DB-15 connector
Logic Polarity for Main- and Delayed-
Trigger Outputs
Fuse RatingEither of two fuses1 may be used: a 0.25I× 1.25I (UL 198.6, 3AG): 6 A FAST, 250 V
1
Each fuse type requires its own fuse cap.
Negative TRUE. High to low transition indicates the trigger occurred.
or a 5 mm × 20 mm (IEC 127): 5 A (T), 250V.
T able 1–8: Nominal traits — Data handling and reliability
NameDescription
Time, Data-Retention,
Nonvolatile Memory
1, 2
Floppy disk drive3.5 inch, 720 K or 1.44 Mbyte, DOS 3.3-or-later compatible
Internal hard disk drive
(option 2M available on the
TDS 500D and 700D)
External data storageIomega Zip drive compatible
1
The times that reference waveforms, stored setups, and calibration constants are retained.
2
Data is maintained by small lithium-thionyl-chloride batteries internal to the memory ICs. At the time of manufacture, no
special disposal requirements were in effect for these batteries as the amount of hazardous material contained was below
the regulated threshold. Consult your local waste disposal agency for proper disposal.
1–16
Battery life ≥ 5 years
175 Mbyte capacity
TDS 500D, TDS 600B and TDS 700D Service Manual
Nominal Traits
T able 1–9: Nominal traits — Mechanical
NameDescription
Cooling MethodForced-air circulation with no air filter. Clearance is required. Refer to the TDS 500D,
TDS 600B & TDS 700D User Manual for minimum clearance dimensions.
Construction MaterialChassis parts constructed of aluminum alloy; front panel constructed of plastic laminate;
circuit boards constructed of glass laminate. Cabinet is aluminum and is clad in Tektronix
Blue vinyl material.
WeightStandard Oscilloscope
14.1 kg (31 lbs), with front cover.
24.0 kg (53 lbs), when packaged for domestic shipment
Rackmount Oscilloscopes
14.1 kg (31 lbs) plus weight of rackmount parts, for the rackmounted Oscilloscopes
(Option 1R).
Rackmount conversion kit
2.3 kg (5 lbs), parts only; 3.6 kg (8 lbs), parts plus package for domestic shipping
Overall DimensionsStandard Oscilloscope
Height: 193 mm (7.6 in), with the feet installed
Width: 445 mm (17.5 in), with the handle
Depth: 434 mm (17.1 in), with the front cover installed
Rackmount Oscilloscope
Height: 178 mm (7.0 in)
Width: 483 mm (19.0 in)
Depth: 558.8 mm (22.0 in)
TDS 500D, TDS 600B and TDS 700D Service Manual
1–17
Nominal Traits
1–18
TDS 500D, TDS 600B and TDS 700D Service Manual
W arranted Characteristics
This section lists the various warranted characteristics that describe the
TDS 500D, TDS 600B and TDS 700D oscilloscopes. Electrical and environmental characteristics are included.
Warranted characteristics are described in terms of quantifiable performance
limits which are warranted.
NOTE. In these tables, those warranted characteristics that are checked in the
procedure Performance Verification appear in boldface type under the column
Name.
As stated above, this section lists only warranted characteristics. A list of typicalcharacteristics starts on page 1–27.
Performance Conditions
The performance limits in this specification are valid with these conditions:
HThe oscilloscope must have been calibrated/adjusted at an ambient tempera-
ture between +20
HThe oscilloscope must be in an environment with temperature, altitude,
humidity, and vibration within the operating limits described in these
specifications.
HThe oscilloscope must have had a warm-up period of at least 20 minutes.
HThe oscilloscope must have had its signal-path-compensation routine last
executed after at least a 20 minute warm-up period at an ambient temperature
within ±5
_ C of the current ambient temperature.
_ C and +30_ C.
TDS 500D, TDS 600B and TDS 700D Service Manual
1–19
Warranted Characteristics
Accuracy, D
age Measureme
Average
Average
Accuracy, O
Accuracy, O
TDS 794D
Analog Ba
ple
TDS
B
T able 1–10: Warranted characteristics — Signal acquisition system
NameDescription
Accuracy, DC GainTDS 600B: ±1.5% for all sensitivities from 2 mV/div to 10 V/div
± 2.0% at 1 mV/div sensitivity
TDS 500D, 700D: ±1% for all sensitivities from 1 mV/div to 10 V/div with offset from 0 V
to ±100V
TDS 794D: ±1% for all sensitivities from 10 mV/div to 1 V/div over permitted offset range
C Volt
d (using
mode)
nt,
Measurement typeDC Accuracy
Average of ≥ 16 waveforms
TDS 600B: ±((1.5% × | reading – Net Offset
+ Offset Accuracy) + (0.06 div × V/div))
Crosstalk (Channel Isolation)≥100:1 at 100 MHz and ≥30:1 at the rated bandwidth for the channel’s Volt/Div setting,
for any two channels having equal Volts/Div settings
Delay Between Channels, Full
Bandwidth
TDS 600B: ≤100 ps for any two channels with equal Volts/Div and Coupling settings and
both channels’ deskew values set to 0
TDS 500D/700D: ≤50 ps for any two channels with equal Volts/Div and Coupling settings
and both channel deskew values set to 0.0 s.
Input Impedance, DC–1 M Coupled1 M±0.5% in parallel with 10 pF ±3 pF (DC–50 Coupled only on TDS 794D)
Input Impedance, DC–50 Coupled
Input Impedance, DC–50 Coupled
TDS 794D
Input Voltage, Maximum,
DC–1 M,
AC–1 M, or
GND Coupled
50 ±1% with VSWR ≤1.3:1 from DC – 500 MHz, ≤1.5:1 from 500 MHz – 1 GHz
50 ±1.25% with VSWR ≤1.5:1 from 100 MHz – 1 GHz, VSWR ≤1.7:1 from 1 GHz –
2 GHz
TDS 600B: ±300 V CAT II, 400 V peak;
derate at 20 dB/decade above 1 MHz
TDS 500D/700D: ±300 V CAT II, 400 V peak;
derate at 20 dB/decade above 1 MHz
(DC–50 or GND Coupled
TDS 794D only)
Input Voltage, Maximum, DC-50 or
5 V
, with peaks ≤±30 V
RMS
AC–50 Coupled
Input Voltage, Maximum, DC-50
5 V
, with peaks ≤±20 V
RMS
Coupled TDS 794D
Lower Frequency Limit, AC Coupled≤10 Hz when AC–1 M Coupled; ≤200 kHz when AC–50 Coupled
1
Net Offset = Offset – (Position × Volts/Div). Net Offset is the nominal voltage level at the oscilloscope input that
3
corresponds to the center of the A-D converter’s dynamic range. Offset Accuracy is the accuracy of this voltage level.
2
The limits given are for the ambient temperature range of 0_C to +30_C. Reduce the upper bandwidth frequencies by
5 MHz for the TDS 600B, by 2.5 MHz for the 500 MHz TDS 500D/700D models, by 5 MHz for the 1 GHz TDS 500D/700D
models, and by 10 MHz for the 2 GHz TDS 500D/700D models for each _C above +30_C.
3
The AC Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X passive probes are used.
TDS 500D, TDS 600B and TDS 700D Service Manual
1–21
Warranted Characteristics
Sensitivity, Edge-Type Trigger
pling
1
Widt
lse
or
Pulse Triggeri
e minimum
lse widths
rm
emiimmlseitsrerm
2
Pulse-Type triggeri
T able 1–11: Warranted characteristics — Time base system
NameDescription
Accuracy, Long Term Sample Rate and
Delay Time
TDS 600B: ±100 ppm over any ≥1 ms interval
TDS 500D/700D: ±25 ppm over any ≥1 ms interval
T able 1–12: Warranted characteristics — T riggering system
NameDescription
, Cou
set to “DC”
Trigger sourceSensitivity
Any Channel
TDS 620B & 644B: 0.35 division from DC to 50 MHz,
increasing to 1 division at 500 MHz
TDS 680B & 684B: 0.35 division from DC to 50 MHz,
increasing to 1 division at 1 GHz
TDS 500D, 724D, & 754D: 0.35 division from DC to 50 MHz,
increasing to 1 division at 500 MHz
TDS 580D & 784D: 0.35 division from DC to 50 MHz, increasing to
1 division at 1 GHz
TDS 794D: 0.35 division from DC to 50 MHz,
increasing to 1 division at 1.5 GHz
Auxiliary
TDS 600B: 250 mV from DC to 50 MHz,
increasing to 500 mV at 100 MHz
h, Minimum Pu
ng
Th
pu
widths and transition times
ng.
and Rearm, f
and rea
required for
TDS 500D, 724D, & 754D: 400 mV from DC to 50 MHz, increasing to
750 mV at 100 MHz
TDS 580D & 784D: 250 mV from DC to 50 MHz,
increasing to 500 mV at 100 MHz
TDS 794D: 250 mV from DC to 50 MHz,
increasing to 500 mV at 100 MHz
For vertical settings > 10 mV/div. and ≤1 V/div at the BNC input
Minimum pulse
Pulse class
width
Minimum re-arm width
Glitch1 ns2 ns + 5% of Glitch Width Setting
Runt
Time-Qualified
Runt
Width1 ns2 ns + 5% of Width Upper Limit Setting
Timeout1 ns2 ns + 5% of Width Upper Limit Setting
Slew Rate600 ps
2
TDS 700D: 8.5 ns + 5% of Delta Time Setting
1–22
TDS 500D, TDS 600B and TDS 700D Service Manual
T able 1–12: Warranted characteristics — T riggering system (Cont.)
Accuracy (Time
e-Glitch or
Pulse-Width Triggering
gic Level
Main- a
Delayed-Trigger
Outp
Outp
age a
Probe
r
NameDescription
Warranted Characteristics
) for Puls
Input Signal Sync Amplitude for Stable
Triggering, NTSC and PAL modes
(Option 05 Video Trigger)
Jitter (Option 05 Video Trigger)60 ns
1
The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on
Time rangeAccuracy
1 ns to 500 ns
500 ns to 1 s
±(20% of setting + 0.5 ns)
±(100 ns + 0.01% of Setting)
Field selection “Odd”, “Even”, or “All”: 0.6 division to 4 divisions
Field selection “Numeric”: 1 division to 4 divisions (NTSC mode)
on NTSC or PAL signal
p-p
the selected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not
“roll” across the screen on successive acquisitions. The TRIG’D LED stays constantly lighted when the SEC/DIV setting
is 2 ms or faster but may flash when the SEC/DIV setting is 10 ms or slower.
2
For Slew Rate Triggering, this is the minimum transition time, defined to be the time the user’s signal spends between
the two trigger threshold settings.
T able 1–13: Warranted characteristics — Output ports, probe compensator, and power requirements
NameDescription
Lo
uts
s,
nd
CharacteristicLimits
Vout (HI)
≥2.5 V open circuit; ≥1.0 V into a 50
load to ground
Vout (LO)
≤0.7 V into a load of ≤4 mA;
≤0.25 V into a 50 load to ground
ut Volt
Compensato
nd Frequency,
CharacteristicLimits
Output Voltage
Frequency
0.5 V (base-top) ±1% into a ≥50 load
1 kHz ±5%
Output Voltage, Signal Out (CH 31)For TDS 600B: 20 mV/division ±20% into a 1 M load;
10 mV/division ±20% into a 50 load
For TDS 500D/700D:
22 mV/division ±20% into a 1 M load;
11 mV/division ±20% into a 50 load
Source Voltage100 to 240 VAC
, continuous range, CAT II
RMS
Source Frequency45 Hz to 440 Hz
Power Consumption≤350 W (450 VA)
1
CH 3 signal out is present at the rear panel if CH 3 (AUX 1 on the TDS 620B or 680B) is selected as the trigger source for
the main and/or delayed trigger systems. It is not available when a channel other than CH3 (AUX 1 on the TDS 620B or
680B) is the source for the Video Trigger when Option 05 is installed.
TDS 500D, TDS 600B and TDS 700D Service Manual
1–23
Warranted Characteristics
T able 1–14: Warranted characteristics — Environmental
NameDescription
AtmosphericsTemperature (no disk in floppy drive):
TDS 600B:Operating: +4_ C to +45_ C
Floppy disk drive: Operating: +10_ C to +45_ C
Nonoperating: –22_ C to +60_ C
TDS 500D/700D:Operating: +0_ C to +50_ C
Floppy disk drive: Operating: +10_ C to +50_ C
Nonoperating: –22_ C to +60_ C
Relative humidity (no disk in floppy drive):
Operating: 20% to 80%, at or below +32_ C,
upper limit derates to 30% relative humidity at +45_ C
Nonoperating: 5% to 90%, at or below +31_ C,
upper limit derates to 20% relative humidity at 60_ C
Altitude:
To 4570 m (15,000 ft.), operating (excluding hard disk drive)
To 3048 m (10,000 ft.), operating (including hard disk drive)
To 12190 m (40,000 ft.), nonoperating
DynamicsRandom vibration (floppy disk not installed):
0.31 g rms, from 5 to 500 Hz, 10 minutes each axis, operating
3.07 g rms, from 5 to 500 Hz, 10 minutes each axis, nonoperating
,
1
Emissions (TDS 500D/700D)
2
Meets or exceeds the requirements of the following standards:
FCC Code of Federal Regulations, 47 CFR, Part 15, Subpart B, Class A
European Community Requirements
EN 55011 Class A Radiated Emissions
EN 55011 Class A Conducted Emissions
EN 50081–1
EN60555–2 Power Line Harmonic Emissions
,
1
Emissions (TDS 600B)
2
Meets or exceeds the requirements of the following standards:
FCC Code of Federal Regulations, 47 CFR, Part 15, Subpart B, Class A
EN 50081–1 European Community Requirements
1–24
EN 55022Radiated Emissions Class B
EN 55022Class B Conducted Emissions
EN60555–2 Power Line Harmonic Emissions
TDS 500D, TDS 600B and TDS 700D Service Manual
Warranted Characteristics
T able 1–14: W arranted characteristics — Environmental (cont.)
NameDescription
,
1
Susceptibility
ApprovalsConforms to and is certified where appropriate to:
1
VGA output cable needs to be terminated, if connected at all, for the Instrument to meet these standards. The test will
pass with LCOM part # CTL3VGAMM–5.
2
The GPIB cable connected to the instrument for certain of the emissions tests must be “low EMI” having a high-quality
outer shield connected through a low impedance to both connector housings. Acceptable cables are Tektronix part
numbers 012-0991-00, -01, -02, and -03. In order to maintain the EMI performance conforming to the above regulations,
the following cables, or their equivalent, should be used: a shielded Centronics cable, 3 meters in length, part number
012-1214-00, and a shielded RS-232 cable, 2.7 meters in length, CA part number 0294-9.
3
UL 3111, CSA 22.2 no.1010 Safety Certification Compliance:
Temperature (operating) 5 to +40 C
Altitude (maximum operating): 2000 meters
Equipment Type: Test and Measurement
Safety Class: Class I (as defined in IEC 1010–1, Annex H) – grounded product
Overvoltage Category: Overvoltage Category II (as defined in IEC 1010–1, Annex J)
Pollution Degree: Pollution Degree 2 (as defined in IEC 1010–1)
2
Meets or exceeds the EMC requirements of the following standards:
EN 50082–1European Community Requirements
IEC 801-2Electrostatic Discharge Performance Criteria B
IEC 801-3Radiated Susceptibility 3 V/meter from 27 MHz to 500 MHz
unmodulated
IEC 801-4Fast Transients Performance Criteria B
IEC 801-5AC Surge Performance Criteria B
UL 3111–1
CAN/CSA C22.2 no. 1010.1
3
– Standard for electrical measuring and test equipment
3
– Safety requirements for electrical equipment for
measurement, control and laboratory use
Note – Rated for indoor use only
TDS 500D, TDS 600B and TDS 700D Service Manual
1–25
Warranted Characteristics
T able 1–15: Certifications and compliances
EC Declaration of Conformity
(TDS 500D and TDS 700D)
Australian Declaration of
Conformity – EMC
(TDS 500D and TDS 700D)
EC Declaration of Conformity
(TDS 600B)
EC Declaration of Conformity –
Low Voltage
Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was
demonstrated to the following specifications as listed in the Official Journal of the European
Communities:
EMC Directive 89/336/EEC:
EN 55011Class A Radiated and Conducted Emissions
EN 50081-1 Emissions:
EN 60555-2AC Power Line Harmonic Emissions
EN 50082-1 Immunity:
IEC 801-2Electrostatic Discharge Immunity
IEC 801-3RF Electromagnetic Field Immunity
IEC 801-4Electrical Fast Transient/Burst Immunity
IEC 801-5Power Line Surge Immunity
Conforms with the following standards in accordance with the Electromagnetic Compatibility
Framework:
AS/NZS 2064.1/2Class A radiated and Conducted Emissions
Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was
demonstrated to the following specifications as listed in the Official Journal of the European
Communities:
EMC Directive 89/336/EEC:
EN 50081-1 Emissions:
EN 55022Class B Radiated and Conducted Emissions
EN 60555-2AC Power Line Harmonic Emissions
EN 50082-1 Immunity:
IEC 801-2Electrostatic Discharge Immunity
IEC 801-3RF Electromagnetic Field Immunity
IEC 801-4Electrical Fast Transient/Burst Immunity
IEC 801-5Power Line Surge Immunity
Compliance was demonstrated to the following specification as listed in the Official Journal of the
European Communities:
1–26
Low Voltage Directive 73/23/EEC
EN 61010-1:1993 Safety requirements for electrical equipment for measurement,
control, and laboratory use
TDS 500D, TDS 600B and TDS 700D Service Manual
Typical Characteristics
Analog Ba
ple
243 or P6245 Probe a
Ba
electi
TDS2D4D24D4D
Analog Ba
ple
Ba
electi
TDS8DTDS84D
Analog Ba
ple
be
Analog Ba
ple
electi
TDS 520D
24D4D84D
This subsection contains tables that list the various typical characteristics which
describe the TDS 500D, TDS 600B and TDS 700D oscilloscopes.
Typical characteristics are described in terms of typical or average performance.
Typical characteristics are not warranted.
T able 1–16: Typical characteristics — Signal acquisition system
NameDescription
ndwidth, DC-50 Cou
with P6
ndwidth s
TDS 520D, 540D, 724D & 754D
with P6245 Probe and
ndwidth s
TDS 580D & TDS 784D
with P6217 Pro
TDS 794D
on is FULL
ndwidth, DC-50 Cou
on is FULL
ndwidth, DC-50 Cou
nd
Volts/Div as read out on screen520D, 540D, 724D & 754D Bandwidth
Accuracy, Delta Time MeasurementThe limits are given in the following table for signals having amplitude greater than
5 divisions, reference level = 50%, filter set to (sinX/X), acquired at 5 mV/div or greater.
For the TDS 700D, pulse duration < 10 div. Channel skew not included.
For the Single Shot condition, 1.4 ≤ T
S
is the sample interval and Tr is the displayed rise time.
i
TDS 600B: For the averaged condition, 1.4 ≤ T
≤ 4, where
r/Si
≤ 40, where Wi is the Waveform
r/Wi
Interval, as described elsewhere in these specifications.
TDS 600B: Extra error in the measurement will occur for two-channel measurements due
to channel-to-channel skew . This is described elsewhere in these specifications.
Time measurement accuracy
Conditions for accuracy listed at right
are: Single Shot or Sample mode (or
HiRes mode on the TDS 500D/700D),
with Full Bandwidth selected.
T able 1–16: Typical characteristics — Signal acquisition system (cont.)
Calculate
ise Time
Calculate
ise Time
2
ective Bits
ective Bits
effective bits for
ste
to
ivisions at
ective Bits
cy
effective bits for
ste
to
ivisions at
ective Bits
cy
eectiveitsorsieveste
NameDescription
Typical Characteristics
d R
TDS 500D/700D
d R
TDS 794D
Eff
Eff
Eff
— TDS 600BInput frequencyEffective bits
The chart on the right gives the typical
effective bits for a 9-division p-p
sine-wave input, 50 mV/div, 10 ns/div
(5 GS/s), with a record length of 1000
points
T able 1–16: Typical characteristics — Signal acquisition system (cont.)
NameDescription
Step Response S
Step Response S
TDS 794D
1
The limits given are for the ambient temperature range of 0_C to +30_C. Reduce the upper bandwidth frequencies by
5 MHz for the TDS 600B or by 2.5 MHz for the TDS 500D/700D for each _C above +30_C.
2
The numbers given are valid 0_C to +30_C and will increase as the temperature increases due to the degradation in
bandwidth. Rise time is calculated from the bandwidth. It is defined by the following formula:
TDS 600B Rise Time (ns)
Note that if you measure rise time, you must take into account the rise time of the test equipment (signal source, etc.) that
you use to provide the test signal. That is, the measured rise time (RT
the rise time of the test signal source (RTgen) according to the following formula:
RT
m
3
The values given are the maximum absolute difference between the value at the end of a specified time interval after the
midlevel crossing of the step and the value one second after the midlevel crossing of the step, expressed as a percentage
of the step amplitude.
) is determined by the instrument rise time (RTi) and
m
3
at
T able 1–17: Typical characteristics — Triggering system
NameDescription
d, DC
Trigger sourceAccuracy
Cou
d
(for signals having rise and fall times
≥ 20 ns)
Input, Auxiliary Trigger
Trigger
Edge Trigg
ng
n E
,
Holdoff, V ariable, Main Trigger
1–30
Any Channel
Auxiliary
The input resistance is ≥1.5 kW; the maximum safe input voltage is
±20 V (DC + peak AC).
Acquisition modeTrigger-position error
Sample, Average
Envelope
For all Time/Division ranges, the minimum holdof f is 250 ns and the maximum holdof f is 12
seconds. The minimum resolution is 8 ns for settings ≤ 1.2 ms.
±((2% × | Setting – Net Offset |)
+ (0.3 div × Volts/div Setting ) + Offset
Accuracy)
T able 1–17: Typical characteristics — Triggering system (cont.)
NameDescription
Setup/Hold Time Violation Trigger,
Minimum Clock Pulse Widths
Input Signal Sync Amplitude for Stable
For vertical settings > 10 mV/div and ≤ 1 V/div at the BNC input,
the minimum requirements are:
Minimum Pulse Width,
Clock High
User Hold Time + 2.5 ns
9
Minimum Pulse Width,
Clock Low
2 ns
All field selections: 0.6 division to 4 divisions
Triggering, HDTV and FLEXFMT modes
(Option 05 Video Trigger)
Jitter for HDTV mode
17 ns
p-p
(Option 05 Video Trigger)
Sync Width Flex Format and HDTV
min. 400 ns
modes (Option 05 Video Trigger)
Sync Duty Cycle, Flex Format and HDTV
min. 50 to 1
modes (Option 05 Video Trigger)
Hum Rejection
(Option 05 Video Trigger)
1
The trigger position errors are typically less than the values given here. These values are for triggering signals having a
NTSC and PAL: –20 dB without any trigger spec deterioration. Triggering will continue
down to 0 dB with some performance deterioration.
slew rate at the trigger point of ≥ 0.5 division/ns.
2
The waveform interval (WI) is the time between the samples in the waveform record. Also, see the footnote for the
characteristics Sample Rate Range or Interpolated Waveform Rates in Table 1–4, on page 1–12.
3
The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on the
selected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not
“roll” across the screen on successive acquisitions. The TRIG’D LED stays constantly lighted when the SEC/DIV setting is
2 ms or faster but may flash when the SEC/DIV setting is 10 ms or slower.
4
The minimum signal levels required for stable logic or pulse triggering of an acquisition, or for stable counting of
a DC-coupled, events-delay signal. Also, see the footnote for Sensitivity, Edge-Type T rigger, DC Coupled in this table.
(Stable counting of events is counting that misses no events and produces no extra, phantom events).
5
The minimum signal levels required for stable runt pulse triggering of an acquisition. Also, see the footnote for Sensitivity,Edge-Type Trigger, DC Coupled in this table. (Stable counting of events is counting that misses no events).
6
The minimum signal levels required for stable pulse width or glitch triggering of an acquisition. Also, see the footnote for
Sensitivity, Edge-T ype T rigger, DC Coupled in this table. (Stable counting of events is counting that misses no events).
7
For Logic, time between channels refers to the length of time a logic state derived from more than one channel must exist
to be recognized. For Events, the time is the minimum time between a main and delayed event that will be recognized if
more than one channel is used.
8
For Slew Rate Triggering, this is the minimum transition time, defined to be the time the user’s signal spends between the
two trigger threshold settings.
9
User Hold Time is the number selected by the user in the Hold Time Menu.
1–32
TDS 500D, TDS 600B and TDS 700D Service Manual
Installation
Supplying Operating Power
NOTE. Read all information and heed all warnings in this subsection before
connecting the oscilloscope to a power source.
WARNING. AC POWER SOURCE AND CONNECTION. The oscilloscope
operates from a single-phase power source. It has a three-wire power cord and
two-pole, three-terminal grounding type plug. The voltage to ground (earth) from
either pole of the power source must not exceed the maximum rated operating
voltage, 250 volts.
Before making connection to the power source, be sure the digitizing oscilloscope
has a suitable two-pole, three-terminal grounding-type plug.
GROUNDING. This instrument is safety Class 1 equipment (IEC designation).
All accessible conductive parts are directly connected through the grounding
conductor of the power cord to the grounded (earthing) contact of the power
plug.
WARNING. The power input plug must be inserted only in a mating receptacle
with a grounding contact where earth ground has been verified by a qualified
service person. Do not defeat the grounding connection. Any interruption of the
grounding connection can create an electric shock hazard.
For electric shock protection, the grounding connection must be made before
making connection to the instrument’s input or output terminals.
Power Cord Information
TDS 500D, TDS 600B and TDS 700D Service Manual
A power cord with the appropriate plug configuration is supplied with each
oscilloscope. Table 2–1 gives the color-coding of the conductors in the power
cord. If you require a power cord other than the one supplied, refer to Table 2–2,
Power Cord Identification.
This oscilloscope operates with any line voltage from 90–250 VAC
RMS
with any
line frequency from 45–440 Hz. There are two fuses, either of which may be
used throughout the line voltage and frequency ranges. (The two fuses are not
totally interchangeable as each requires a different fuse cap.)
TDS 500D, TDS 600B and TDS 700D Service Manual
Installation
Memory Backup Power
Operating Environment
Operating Temperature
Memory modules with on-board batteries allow the TDS 500D, TDS 600B and
TDS 700D Oscilloscopes to retain some types of data upon loss of the AC power
source. The stored adjustment constants, saved front-panel settings, current
front-panel settings (instrument status), and waveforms saved in memory are
retained.
The on-board batteries of the memory modules have a shelf life of about five
years. Partial or total loss of stored settings upon power on may indicate that the
memory modules need to be replaced.
The following environmental requirements are provided to ensure proper
operation and long instrument life.
Operate oscilloscopes where the ambient air temperature is from
4_ C to +45_ C (+50_ C for the TDS 500D and 700D) with no diskette in the
floppy drive. Store the oscilloscopes in ambient temperatures from –22_ C to
+60_ C with no diskette in the floppy drive. After storage at temperatures outside
the operating limits, allow the chassis to stabilize at a safe operating temperature
before applying power.
Ventilation Requirements
The oscilloscopes are cooled by air drawn in and exhausted through their cabinet
side panels by an internal fan. To ensure proper cooling of the oscilloscope, allow
at least two inches clearance on both sides and 3/4 inch on the bottom of the
oscilloscope. (The feet on the bottom of the oscilloscope provide the required
clearance when set on flat surfaces.) The top of the oscilloscope does not require
ventilation clearance.
CAUTION. If air flow is restricted, the digitizing oscilloscope’s power supply may
temporarily shut down.
TDS 500D, TDS 600B and TDS 700D Service Manual
2–3
Installation
Applying and Interrupting Power
Consider the following information when you power on or power off the
instrument, or when power is interrupted due to an external power failure.
Power On
Power Off
Upon power on, the oscilloscope runs a power-on self check. If it passes, the
oscilloscope displays a “passed” status message and a prompt to press CLEAR
MENU to continue. If it fails, the oscilloscope displays a diagnostic log that
identifies the area(s) that failed and a prompt to press CLEAR MENU to
continue. See Section 6, Maintenance, for information on diagnostics and fault
isolation.
CAUTION. DO NOT power off the oscilloscope when either running a signal path
compensation or when doing any of the adjustments described in Section 5,
Adjustment Procedures. To do so might result in the loss of internally stored
adjustment constants.
In general, do not power off the instrument when doing operations that affect the
data types listed in Table 1–1. Wait for the instrument to finish the operation
when doing adjustments, saving waveforms, or saving setups.
Improper power off or unexpected loss of power to the oscilloscope can result in
the following corruptions of nonvolatile RAM (NVRAM). The following table
describes the messages displayed when power is restored after an abnormal
power off.
2–4
T able 2–3: Effects of corrupted data
Corrupted Data TypeResults
Adjustment Constants:
Signal Path CompensationA signal path compensation is required
Voltage ReferenceA voltage reference adjustment is required
(Section 5)
Frequency ResponseA frequency response adjustment is required
(Section 5)
Error LogErrors logged are lost
Reference WaveformsW aveform Lost
Saved SetupsSetup Lost
TDS 500D, TDS 600B and TDS 700D Service Manual
Repackaging Instructions
Use a corrugated cardboard shipping carton having a test strength of at least
275 pounds and with an inside dimension at least six inches greater than the
instrument dimensions.
If the instrument is being shipped to a Tektronix Service Center, enclose the
following information: the owner’s address, name and phone number of a contact
person, type and serial number of the instrument, reason for returning, and a
complete description of the service required.
Seal the shipping carton with an industrial stapler or strapping tape.
Mark the address of the Tektronix Service Center and also your own return
address on the shipping carton in two prominent locations.
Installed Options
Your instrument may be equipped with one or more instrument options. Except
for the line-cord options described by Table 2–2 (on page 2–2 of this section),
all options and optional accessories are listed and described in Section 7,
Options. For further information and prices of instrument options, see your
Tektronix Products catalog or contact your Tektronix Field Office.
Installation
TDS 500D, TDS 600B and TDS 700D Service Manual
2–5
Installation
2–6
TDS 500D, TDS 600B and TDS 700D Service Manual
Operating Instructions
Before doing service, read the following operating instructions. These instructions are at the level appropriate for servicing these oscilloscopes. The UserManual contains more complete operating instructions.
Additional instructions are integrated into the service procedures found in later
sections of this manual. For instance, the procedures found in the section
Performance Verification contain instructions for making the front-panel settings
required to check each instrument characteristic included there. Also, the general
instructions for operating these oscilloscopes’ internal diagnostic routines are
found in Section 6, Maintenance. You may also find the Product Description in
Section 1 useful for understanding how the oscilloscope functions.
Screen Layout
Figure 2–1 on page 2–8 shows the screen layout. This figure illustrates a full
graticule. You may also select a grid, crosshair, or frame graticule from the
display menu.
Basic Procedures
How to Power On
Push the principal power switch found on the rear panel of the oscilloscope, then
push the ON/STBY (standby) switch to toggle the oscilloscope into operation.
The switch at the rear panel is the true power disconnect switch. The ON/STBY(standby) switch simply toggles operation on and off.
WARNING. The principal power switch at the rear panel is the true power
disconnect switch. The ON/STBY (standby) switch simply toggles operation on
and off. When connected to a power source and when the principal power switch
is on, the internal power supplies and much of the other circuitry of these
oscilloscopes are energized regardless of the setting of the ON/STBY switch.
TDS 500D, TDS 600B and TDS 700D Service Manual
2–7
Operating Instructions
Brief status
information
Graticule and waveforms
Waveform reference
symbols shows ground
levels and waveform
sources
Vertical scale, horizontal scale,
and trigger level readouts
Pop-up menu
Position of waveform
record relative to
the screen and display
General purpose
knob readout
Side menu
area. Readouts
for
measurements
move here
when CLEAR
MENU is
pressed.
How to Use Help
How to Use the Status
Menu
Main menu display area. Readouts in lower graticule
area move here when CLEAR MENU is pressed.
Figure 2–1: Map of Display Functions
Push the HELP front-panel button to enter help mode. Front-panel knobs and
buttons now display information about their function when turned or pushed.
Push HELP again to exit help mode.
To get help information on a menu item, display the menu desired (if you are in
help mode, exit help first). Push HELP. Now the menu buttons display informa-
tion about their function when pushed.
Push the SHIFT, then the STATUS front-panel buttons to display the status
menu. You will find messages reflecting the state of the acquisition system,
whether it is running or stopped (and if it is stopped, why), as well as
setup-related information.
2–8
TDS 500D, TDS 600B and TDS 700D Service Manual
Operating Instructions
How to Set Functions
Special function controls.
Access all functions except
vertical, horizontal, and
trigger functions from this
front-panel control block.
Most functions can be set either by using one (or two) front-panel button(s) or
knob(s), or by pushing a front-panel button to use a main menu, and then a
side-menu button to set the function. The following steps illustrate both
procedures.
1.Locate the block that contains the function to be set.
Vertical function controls. Access all
vertical functions and inputs from
this front-panel control block.
Horizontal function controls.
Access all horizontal functions
from this front-panel block.
Trigger function controls.
Access all trigger functions
from this front-panel block.
TDS 500D, TDS 600B and TDS 700D Service Manual
2–9
Operating Instructions
2.Select the waveform source(s). Position, scale, and set trigger level for
waveform source(s) directly from the front panel. The steps that follow
provide examples of possible control selections.
8
7
123
4
2–10
65
a.Input waveforms into these channels (7). Example: CH 1.
b. Push any channel’s button (8) to display its waveform. The last channel
turned on determines which waveform is positioned and scaled. The
indicator above the channel last selected is lighted.
Example: Push CH 1; then CH 2.
c.Vertically (1) and horizontally (2) scale and position the waveform(s)
selected. Example: Set the scale to 100 mV/div and center the waveform
on screen.
d. Stop and start acquiring waveforms (3). Example: Push RUN/STOP if
not acquiring.
TDS 500D, TDS 600B and TDS 700D Service Manual
Operating Instructions
e.Adjust trigger level (6) to trigger the waveform(s) selected or use these
buttons (5) to either set a trigger level at the mid-amplitude level of the
selected waveform or to force a single trigger. Example: Push SET
LEVEL TO 50%.
3.Set all other functions using menus.
a.Choose the waveform source (8) first if setting a vertical function; else
skip to step b. Example: Push CH 2.
b. Push SHIFT (4) if the function to be set is highlighted in blue; else skip
to step c.
9
14
13
10
11
12
c.Push the front-panel button that corresponds to the menu containing the
function. A main menu (14) for selecting among related functions
appears. Example: Push VERTICAL MENU.
Note the two labels: the top label is a function to choose from; the
bottom label tells you the current setting for that function. Offset is
currently set to 0 V.
d. Select a function from the main menu using the main-menu buttons (12).
A side menu for selecting among that the available settings for that
function appears. Example: Push Coupling (13).
TDS 500D, TDS 600B and TDS 700D Service Manual
2–11
Operating Instructions
e.Select the setting for the function from the side menu (9) using the
side-menu buttons (11). Example: Push AC (10).
How to Set Complex
Functions
18
A few functions require more than just two levels (main and side) of menus to
completely specify their settings. In such cases, either the main menu, the side
menu, or both are modified to supply additional choices. The procedures that
follow show both schemes.
1.Set up a function using pop-up menus:
15
17
16
a.For some selections, pushing a main-menu button pops up a menu (18)
of subfunctions. Example: Push Type (17).
Note the pop-up menu for Type is set to Edge. All the main-menu
buttons to the right of the pop-up menu are labeled with subfunctions of
Edge.
b. Pushing the button that popped up the menu (17) toggles through the
pop-up menu choices. Example: Repeatedly push Type to move through
the pop-up menu. Notice the other main-menu button labels change
accordingly. Push Type to move back to Edge.
c.Complete the setting of the desired mode by selecting from the main
menu and the side menu that results. Example: Push Mode & Holdoff
(16), and then push Normal (15).
2–12
TDS 500D, TDS 600B and TDS 700D Service Manual
Operating Instructions
2.Set up a function using the general purpose knob (20). (The examples of
possible menu selections in the substeps that follow assume you have pushed
TRIGGER MENU.)
1920
21
a.Pushing some main-menu buttons displays a side menu with labels
containing readouts that can be varied. Example: Push Level (21).
b. Pushing the side-menu button Level assigns the general purpose knob to
control the readout appearing in the button label. It also copies the
readout to the general purpose knob readout area in the right corner of
the screen. Example: Push Level (19).
c.Use the general purpose knob (20) to adjust the trigger level to the
setting desired. Example: Turn the knob to –20 mV.
More About the General Purpose Knob. As you’ve just seen, the general purpose
knob can be used to extend the number of choices available to a side menu
button. The general purpose knob can also be assigned to control the following
functions:
HCursor positioning
HDisplay intensities
HDelay time
TDS 500D, TDS 600B and TDS 700D Service Manual
2–13
Operating Instructions
HGated measurements
HNumber of events
HTemplate generation
HTrigger position
HHoldoff
HOffset
HVariable persistence
In all cases, the menus are used to select the function to which the general
purpose knob is assigned. The following attributes apply to this knob:
HDepending on the function it is assigned to control, the general purpose knob
may vary numerical readouts, position objects (cursors) on screen, or select
between icon-label settings that show up in side-menu labels.
HThe general purpose knob has a readout area at the upper right corner of the
screen. (See Figure 2–1.) This readout always reflects the name and value of
the function that the general purpose knob is currently controlling.
HWhenever the general purpose knob assignment is changed, a knob icon
appears immediately to the left of the general purpose knob readout to notify
you of the assignment change. The icon is removed as soon as you use the
general purpose knob to change the value of the function it is assigned to.
HTo assign the general purpose knob to control a function, display the menu
containing the function; then select the function. (Note that not all functions
can be controlled by the general purpose knob.)
HWhenever the menu is removed, the general purpose knob is not assigned
and doesn’t control any function. (An exception is the cursor function. If
cursors are turned on, removing the menu leaves the knob assigned to control
the cursors until reassigned by selecting another menu and function that uses
the knob.)
HWhen the SHIFT button is lighted, the general purpose knob becomes a
coarse adjustment. When the SHIFT button is not lighted, the general
purpose knob becomes a fine adjustment.
HThe general purpose knob also has a SELECT button. This button is used to
toggle the knob between the control of either of the two cursors displayed
when H-bar or V-bar cursors are turned on in the cursor menu.
2–14
TDS 500D, TDS 600B and TDS 700D Service Manual
Operating Instructions
Display and Utility Menus. Using the techniques described for using menus, you
can access and change functions in the display menu and utilities menu. In the
Display menu, you can set the following functions:
HColor: waveforms, readouts, graticule
HIntensity: waveforms, readouts, graticule, etc.
HStyle of waveform display(s): vectors or dots, intensified or nonintensified
samples, and infinite or variable persistence
HDisplay format: XY or YT
HGraticule format: type
HWaveform interpolation filter and readout options
From the Utility menu, you can configure the GPIB port (talk/listen, address,
etc.) and access internal routines for self diagnostics and self compensation.
Instructions for setting up communication over the GPIB are found in Section 5,
Adjustment Procedures.
TDS 500D, TDS 600B and TDS 700D Service Manual
2–15
Operating Instructions
2–16
TDS 500D, TDS 600B and TDS 700D Service Manual
Theory of Operation
This section describes the electrical operation of the TDS 500D, TDS 600B and
TDS 700D Oscilloscopes using the major circuit blocks or modules.
This section has two main parts:
HLogic Conventions describes how logic functions are discussed and
represented in this manual.
HModule Overview describes circuit operation from a functional-circuit block
perspective.
Logic Conventions
The oscilloscopes contain many digital logic circuits. This manual refers to these
circuits with standard logic symbols and terms. Unless otherwise stated, all logic
functions are described using the positive-logic convention: the more positive of
the two logic levels is the high (1) state, and the more negative level is the low
(0) state. Signal states may also be described as “true” meaning their active state
or “false” meaning their nonactive state. The specific voltages that constitute a
high or low state vary among the electronic devices.
Module Overview
General
Input Signal Path
Active-low signals are indicated by a tilde prefixed to the signal name
(~RESET). Signal names are considered to be either active-high, active-low, or
to have both active-high and active-low states.
This module overview describes the basic operation of each functional circuit
block as shown in Figure 9-2.
The TDS 500D, TDS 600B and TDS 700D Oscilloscopes have four channels.
Each channel provides a calibrated vertical scale factor.
A signal enters the oscilloscope through a probe connected to a BNC on the A10
Attenuator/Acquisition board.
Attenuators. Circuitry in the attenuator selects the input coupling, termination,
and the attenuation factor. The processor system, by way of the acquisition
system, controls the attenuators. For example, if 50 input termination is
TDS 500D, TDS 600B and TDS 700D Service Manual
3–1
Theory of Operation
selected and the input is overloaded, the processor system switches the input to
the 1 MW position (on TDS models with 1 MW termination).
Probe Coding Interface. Probe coding interface signals pass through the attenuator
portion of the A10 Attenuator/Acquisition to the acquisition system, where they
are sensed and controlled.
Acquisition System. The acquisition system amplifies the input signals, samples
them, converts them to digital signals, and controls the acquisition process under
direction of the processor system. The acquisition system includes the trigger,
acquisition timing, and acquisition mode generation and control circuitry.
V oltage Controlled Oscillator (VCO). Master clocks for the acquisition system are
generated by the circuitry on the A10 Acquisition board. The circuitry makes up
a phase-locked loop. The master clock is divided down by the A10 Acquisition
circuitry under control of the processor system.
D1 Bus. The acquisition system passes the digital values representing the
acquired waveform through the A14 D1 Bus to the A11 DRAM Processor/Display board. This happens after a waveform acquisition is complete if the digital
signal processor in the processor system requests the waveform.
Processor System. The processor system contains a microprocessor that controls
the entire instrument. This system also includes the firmware and a GPIB
interface. You can reprogram the firmware from a remote controller using the
GPIB and an external software package.
The processor also includes a digital signal processor. This signal processor
processes each waveform as directed by the system processor. Waveforms and
any text to be displayed are passed on to the display system. The A11 DRAM
Processor/Display board contains both the processor and display systems.
Display System. Text and waveforms are processed by different parts of the
display circuitry. The display system sends the text and waveform information to
the tube assembly as a video signal. The display system also generates and sends
vertical (VSYNC) and horizontal (HSYNC) sync signals to the tube assembly. A
VGA-compatible video output is at the rear of the TDS 500D, TDS 600B and
TDS 700D.
3–2
Tube Assembly
All information (waveforms, text, graticules, and pictographs) is displayed by the
A30/31/32 Display system. The A30 generates the high voltages necessary to
drive the display tube. It also contains the video amplifier, horizontal oscillator,
and the vertical and horizontal yoke driver circuitry.
TDS 500D, TDS 600B and TDS 700D Service Manual
Theory of Operation
Front Panel
Rear Panel
Low Voltage Power
Supply
The processor system sends instructions to and receives information from the
Front Panel Processor on the A12 Front Panel board. The Front Panel Processor
reads the front-panel switches and potentiometers. Any changes in their settings
are reported to the processor system. The Front Panel Processor also turns the
LEDs on and off and generates the bell signal.
Front-panel menu switches are also read by the Front Panel Processor. The
processor sends any changes in menu selections to the processor system. The
ON/STBY switch is one of the menu switches. However, it is not read by the
Front Panel Processor, but passes through the A12 Front Panel board and the A11
DRAM Processor/Display board to the low voltage power supply.
The front panel also generates the probe compensation signals SIGNAL
and GND.
The GPIB connector provides access to stored waveforms and allows external
control of the oscilloscope.
You can make hardcopies on the GPIB, RS-232 and Centronics ports.
The low voltage power supply is a switching power converter with active power
factor control. It supplies power to all of the circuitry in the oscilloscope.
Fan
The principal POWER switch, located on the rear panel, controls all power to
the oscilloscope including the Low Voltage Power Supply. The ON/STBY
switch, located on the front panel, also controls all of the power to the oscilloscope except for part of the circuitry in the Low Voltage Power Supply.
The power supply sends a power fail (~PF) warning to the processor system if
the power is going down.
The fan provides forced air cooling for the oscilloscope. It connects to +25 V
from the Low Voltage Power Supply by way of the A11 DRAM Processor/Display module.
TDS 500D, TDS 600B and TDS 700D Service Manual
3–3
Theory of Operation
3–4
TDS 500D, TDS 600B and TDS 700D Service Manual
Performance Verification Procedures
Two types of Performance Verification procedures can be performed on this
product: Brief Procedures and Performance Tests. You may not need to perform
all of these procedures, depending on what you want to accomplish.
HTo rapidly confirm that the oscilloscope functions and was adjusted properly,
just do the brief procedures under Self Tests, which begin on page 4–5.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.
HTo further check functionality, first do the Self Tests just mentioned; then do
the brief procedures under Functional Tests that begin on page 4–7.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 the oscilloscope. They can be
used to quickly determine if the oscilloscope is suitable for putting into
service, such as when it is first received.
HIf more extensive confirmation of performance is desired, do the Perform-
ance Tests, beginning on page 4–15, after doing the Functional and Self Tests
just referenced.
Advantages: These procedures add direct checking of warranted specifica-
tions. They require more time to perform and suitable test equipment is
required. (See Equipment Required beginning on page 4–16).
If you are not familiar with operating this oscilloscope, read the TDS 500D,
TDS 600B & TDS 700D Reference (071-0137-XX) or the TDS 500D, TDS 600B
& TDS 700D User Manual (071-0130-XX). These contain instructions that will
acquaint you with the use of the front-panel controls and the menu system.
TDS 500D, TDS 600B and TDS 700D Service Manual
4–1
Performance Verification Procedures
Input Channels vs. Model
When performing the procedures in this section, be aware that some TDS models
refer to input channels Ch 3 and Ch 4 as Aux 1 and Aux 2 respectively. Where
appropriate, both names will appear in the procedure, for example, Ch 3 (Aux 1).
The channel names for the various TDS models are shown below.
TDS ModelChannel Names
TDS 540D, 580D, 644B, 684B, 754D, 784D, and 794D
TDS 520D, 620B, 680B, and 724DCh 1, Ch 2, Aux 1, and Aux 2
Conventions
Throughout these procedures the following conventions apply:
Ch 1, Ch 2, Ch 3, and Ch 4
HEach test procedure uses the following general format:
Title of Test
Equipment Required
Prerequisites
Procedure
HEach 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
HFirst Subpart
HSecond Subpart
b. Second Substep
2.Second Step
HIn 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, as in the example
step below, “Initialize the oscilloscope” by doing “Press save/recall SETUP.
Now, press the main-menu button...”.
4–2
TDS 500D, TDS 600B and TDS 700D Service Manual
Performance Verification Procedures
Initialize the oscilloscope: Press save/recall SETUP. Now, press the
main-menu button Recall Factory Setup; then the side-menu button OKConfirm Factory Init.
HWhere 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 UTILITY, press the
main-menu button System until Cal is highlighted in the pop-up menu.
Verify that the status message is Pass in the main menu under the VoltageReference label.”
STOP. The STOP notation at the left is accompanied by information you must read
to do the procedure properly.
HRefer to Figure 4–1: “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.
Brief status
information
Graticule and waveforms
Waveform reference
symbols show ground levels
and waveform sources
Vertical scale, horizontal scale,
and trigger level readouts
Pop-up menu
Position of waveform
record relative to
the screen and display
General purpose
knob readout
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 4–1: Map of display functions
TDS 500D, TDS 600B and TDS 700D Service Manual
4–3
Performance Verification Procedures
4–4
TDS 500D, TDS 600B and TDS 700D Service Manual
Brief Procedures
Self Tests
The Self Tests use internal routines to confirm basic functionality and proper
adjustment. No test equipment is required to do these test procedures.
The Functional Tests utilize the probe-compensation output at the front panel as
a test-signal source for further verifying that the oscilloscope functions properly.
A probe is required to do these test procedures.
This procedure uses internal routines to verify that the oscilloscope functions and
was adjusted properly. No test equipment or hookups are required.
Verify Internal Adjustment,
Self Compensation, and
Diagnostics
Equipment
required
PrerequisitesPower on the oscilloscope and allow a 20 minute warm-up before doing
1.Verify that internal diagnostics pass: Do the following substeps to verify
passing of internal diagnostics.
a.Display the System diagnostics menu:
HPress SHIFT; then press UTILITY.
HRepeatedly press the main-menu button System until Diag/Err is
highlighted in the pop-up menu.
b. Run the System Diagnostics:
HFirst disconnect any input signals from all four channels.
HPress the main-menu button Execute; then press the side-menu
button OK Confirm Run Test.
c.Wait: The internal diagnostics do an exhaustive verification of proper
oscilloscope function. This verification will take up to three and a half
minutes on some models. When the verification is finished, the resulting
status will appear on the screen.
None
this procedure.
d. Verify that no failures are found and reported on-screen. If any failures
occur do step 1a, then press the main menu button Error Log for details.
e.Confirm the three adjustment sections have passed status:
TDS 500D, TDS 600B and TDS 700D Service Manual
4–5
Brief Procedures
HPress SHIFT; then press UTILITY.
HHighlight Cal in the pop-up menu by repeatedly pressing the
main-menu button System. See Figure 4–2.
HVerify that the word Pass appears in the main menu under the
following menu labels: Voltage Reference, Frequency Response,
and Pulse Trigger. See Figure 4–2.
f.Run the signal-path compensation: Press the main-menu button Signal
Path; then press the side-menu button OK Compensate Signal Paths.
g.Wait: Signal-path compensation may take five minutes on the
TDS 500D/700D and fifteen minutes on the 600B to run. While it
progresses, a “clock” icon (shown at left) is displayed on-screen. When
compensation completes, the status message will be updated to Pass or
Fail in the main menu. See step h.
h. Confirm signal-path compensation returns passed status: Verify that the
wordPass appears under Signal Path in the main menu. See Figure 4–2.
4–6
Highlight Cal
1
3
Verify Pass
2
Verify Pass
Figure 4–2: Verifying adjustments and signal-path compensation
2.Return to regular service: Press CLEAR MENU to exit the system menus.
TDS 500D, TDS 600B and TDS 700D Service Manual
Functional Tests
Brief Procedures
The purpose of these procedures is to confirm that the 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.
CAUTION. The P6217, P6243, and P6245 probes that can be used with this
oscilloscope provide an extremely low loading capacitance (<1 pF) to ensure the
best possible signal reproduction. These probes should not be used to measure
signals exceeding ±8 volts, or errors in signal measurement will be observed.
Above 40 volts, damage to the probe may result. To make measurements beyond
±10 volts, use either the P6139A probe (good to 500 volts peak), the P6339A
probe (for the TDS 794D), or refer to the catalog for a recommended probe.
STOP. These procedures verify functions; that is, they verify that the oscilloscope
features operate. They do not verify that they operate within limits.
Verify All Input Channels
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 NOT interpret the
quantities given as limits. Operation within limits is checked in PerformanceTests, which begin on page 4–15.
STOP. 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.
Equipment
required
PrerequisitesNone
One probe such as the P6243, P6245, P6139A, or P6339A
1.Install the test hookup and preset the oscilloscope controls:
a.Hook up the signal source: Install the probe on CH 1. Connect the probe
tip to PROBE COMPENSATION SIGNAL on the front panel;
TDS 500D, TDS 600B and TDS 700D Service Manual
4–7
Brief Procedures
connect the probe ground (typically black) to PROBE COMPENSA-TION GND. If using a P6243 or P6245 probe, you may want to attach a
Y-lead connector and two SMD KlipChips as shown in Figure 4–3.
SignalGnd
Figure 4–3: Universal test hookup for functional tests – TDS 600B shown
b. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
2.Verify that all channels operate: Do the following substeps — test CH 1
first, skipping substep a and b since CH 1 is already set up for verification
and as the trigger source from step 1.
a.Select an unverified channel:
HPress WAVEFORM OFF to remove the channel just verified from
display.
4–8
HPress the front-panel button that corresponds to the channel you are
to verify.
TDS 500D, TDS 600B and TDS 700D Service Manual
Brief Procedures
HMove the probe to the channel you selected.
b. Match the trigger source to the channel selected:
HPress TRIGGER MENU.
HPress the main-menu button Source.
HPress the side-menu button that corresponds to the channel selected,
Ch2, Ch3, or Ch4. (Some TDS models use Ax1 and Ax2 instead of
Ch3 and Ch4).
c.Set up the selected channel:
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE to 200 s. Press CLEAR MENU to
remove any menu that may be on the screen.
HPress SET LEVEL TO 50%.
d. Verify that the channel is operational: Confirm that the following
statements are true.
HThe 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 4–1 on page 4–3
to locate the readout.
HThe vertical POSITION knob moves the signal up and down the
screen when rotated.
HTurning 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.
e.Verify that the channel acquires in all acquisition modes: Press SHIFT;
then press ACQUIRE MENU. Use the side menu to select, in turn, each
of the three 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.
HSample mode displays an actively acquiring waveform on-screen.
(Note that there is noise present on the peaks of the square wave).
HPeak Detect mode displays an actively acquiring waveform
on-screen with the noise present in Sample mode “peak detected.”
HHi Res mode (TDS 500D and 700D only) displays an actively
acquiring waveform on-screen with the noise that was present in
Sample mode reduced.
TDS 500D, TDS 600B and TDS 700D Service Manual
4–9
Brief Procedures
HEnvelope mode displays an actively acquiring waveform on-screen
with the noise displayed.
HAverage mode displays an actively acquiring waveform on-screen
with the noise reduced.
f.Test all channels: Repeat substeps a through e until all four input
channels are verified.
3.Remove the test hookup: Disconnect the probe from the channel input and
the probe-compensation terminals.
Verify the Time Base
Equipment
required
PrerequisitesNone
One probe such as the P6243, P6245, P6139A, or P6339A
1.Install the test hookup and preset the oscilloscope controls:
a.Hook up the signal source: Install the probe on CH 1. Connect the probe
tip to PROBE COMPENSATION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSATION GND. See
Figure 4–3 on page 4–8.
b. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup; then press the
side-menu button OK Confirm Factory Init.
c.Modify default settings:
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE to 200 s.
HPress SET LEVEL TO 50%.
4–10
HPress CLEAR MENU to remove the menus from the screen.
2.Verify that the time base operates: Confirm the following statements.
a.One period of the square-wave probe-compensation signal is about five
horizontal divisions on-screen for the 200 s horizontal scale setting (set
in step 1c).
b. Rotating the horizontal SCALE knob clockwise expands the waveform
on-screen (more horizontal divisions per waveform period), counterclockwise rotation contracts it, and returning the horizontal scale to
200 s returns the period to about five divisions.
TDS 500D, TDS 600B and TDS 700D Service Manual
Brief Procedures
c.The horizontal POSITION knob positions the signal left and right
on-screen when rotated.
3.Remove the test hookup: Disconnect the probe from the channel input and
the probe-compensation terminals.
Verify the Main and
Delayed Trigger Systems
Equipment
required
PrerequisitesNone
One probe such as the P6243, P6245, P6139A, or P6339A
1.Install the test hookup and preset the oscilloscope controls:
a.Hook up the signal source: Install the probe on CH 1. Connect the probe
tip to PROBE COMPENSATION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSATION GND. See
Figure 4–3 on page 4–8.
b. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
c.Modify default settings:
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE for the M (main) time base to 200 s.
HPress SET LEVEL TO 50%.
HPress TRIGGER MENU.
HPress the main-menu button Mode & Holdoff.
HPress the side-menu button Normal.
HPress CLEAR MENU to remove the menus from the screen.
2.Verify that the main trigger system operates: Confirm that the following
statements are true.
HThe trigger level readout for the main trigger system changes with the
trigger-LEVEL knob.
HThe trigger-LEVEL knob can trigger and untrigger the square-wave
signal as you rotate it. (Leave the signal untriggered, which is indicated
by the display not updating).
TDS 500D, TDS 600B and TDS 700D Service Manual
4–11
Brief Procedures
HPressing SET LEVEL TO 50% triggers the signal that you just left
untriggered. (Leave the signal triggered).
3.Verify that the delayed trigger system operates:
a.Select the delayed time base:
HPress HORIZONTAL MENU.
HPress the main-menu button Time Base.
HPress the side-menu button Delayed Triggerable; then press the
side-menu button Delayed Only.
HSet the horizontal SCALE for the D (delayed) time base to 200 s.
b. Select the delayed trigger level menu:
HPress SHIFT; then press DELAYED TRIG.
HPress the main-menu button Level; then press the side-menu button
Level.
c.Confirm that the following statements are true:
HThe trigger-level readout for the delayed trigger system changes as
you turn the general purpose knob.
HAs you rotate the general purpose knob, the square-wave probe-com-
pensation signal can become triggered and untriggered. (Leave the
signal untriggered, which is indicated by the display not updating).
HPressing the side-menu button Set to 50% triggers the probe-com-
pensation signal that you just left untriggered. (Leave the signal
triggered).
d. Verify the delayed trigger counter:
HPress the main-menu button Delay by Time.
HUse the keypad to enter a delay time of 1 second. Press 1, then press
ENTER.
HVerify that the trigger READY indicator on the front panel flashes
about once every second as the waveform is updated on-screen.
4.Remove the test hookup: Disconnect the probe from the channel input and
the probe-compensation terminals.
4–12
TDS 500D, TDS 600B and TDS 700D Service Manual
Brief Procedures
Verify the File System
Equipment
required
PrerequisitesNone
One probe such as the P6243, P6245, P6139A, or P6339A
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 TDS Family
Programmer Disk (Tektronix part number 063-3002-XX) included in the
TDS 500D, TDS 600B & TDS 700D User Manual (Tektronix part
number 071–0130–XX).
1.Install the test hookup and preset the oscilloscope controls:
a.Hook up the signal source: Install the probe on CH 1. Connect the probe
tip to PROBE COMPENSATION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSATION GND. See
Figure 4–3 on page 4–8.
b. Insert the test disk: Insert the floppy disk in the floppy disk drive to the
left of the monitor.
HPosition the disk so the metal shutter faces the drive.
HPosition the disk so the stamped arrow is on the top right side. In
other words, place the angled corner in the front bottom location.
HPush the disk into the drive until it goes all the way in and clicks
into place.
c.Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
d. Modify default settings:
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE for the M (main) time base to 200 s.
Notice the waveform on the display now shows two cycles instead of
five.
HPress SET LEVEL TO 50%.
HPress CLEAR MENU to remove the menus from the screen.
e.Save the settings:
HPress SETUP.
HPress the main-menu button Save Current Setup; then press the
side-menu button To File.
TDS 500D, TDS 600B and TDS 700D Service Manual
4–13
Brief Procedures
HTurn the general purpose knob to select the file to save. Choose
(or fd0:, the floppy disk drive, hd0:, the optional
hard disk drive, or Zip:, if an external Zip drive is connected). With
this choice, you will save a file starting with , then containing
5-numbers, and a extension. For example, the first time you
run this on a blank, formatted disk or on the Example Programs
Disk, the oscilloscope will assign the name to your
file. If you ran the procedure again, the oscilloscope would
increment the name and call the file .
NOTE. If testing an external Zip drive, it must first be connected to the oscilloscope, then be powered on simultaneously with the oscilloscope, or immediately
after the oscilloscope is powered-on. This ensures proper communications are
set up between the oscilloscope and the Zip drive.
f.To test the optional hard disk drive or external Zip drive, choose either
the hard disk drive (hd0:), or the external Zip drive (Zip:). Then use the
general purpose knob to select the file to save. Save the file as in step e.
HPress the side-menu button Save To Selected File.
2.Verify the file system works:
HPress the main-menu button Recall Factory Setup and the side-menu
button OK Confirm Factory Init to restore the 500 s time base and
the five cycle waveform.
HPress the main-menu button Recall Saved Setup; then press the
side-menu button From File.
HTurn the general purpose knob to select the file to recall. For example, if
you followed the instructions previously and saved the file to either the
floppy disk drive (fd0:), or the optional hard disk drive (hd0:), you had
the oscilloscope assign the name TEK00000.SET to your file.
HPress the side-menu button Recall From Selected File.
HVerify that the oscilloscope retrieved the saved setup from the disk. Do
this by noticing the horizontal SCALE for the M (main) time base is
again 200 s and the waveform shows only two cycles just as it was
when you saved the setup.
3.Remove the test hookup:
4–14
HDisconnect the probe from the channel input and the probe-compensa-
tion terminals.
HRemove the floppy disk from the floppy disk drive.
TDS 500D, TDS 600B and TDS 700D Service Manual
Performance Tests
This section contains a collection of procedures for checking that the TDS 500D,
TDS 600B, and TDS 700D Oscilloscopes perform as warranted.
The procedures are arranged in four logical groupings: Signal Acquisition System
Checks, Time Base System Checks, Triggering System Checks, and Output Ports
Checks. They check all the characteristics that are designated as checked in
Specifications. (The characteristics that are checked appear in boldface type
under Warranted Characteristics in Specifications).
STOP. These procedures extend the confidence level provided by the basic
procedures described on page 4–5. The basic procedures should be done first,
then these procedures performed if desired.
Prerequisites
The tests in this section comprise an extensive, valid confirmation of performance and functionality when the following requirements are met:
HThe cabinet must be installed on the oscilloscope.
HYou must have performed and passed the procedures under Self Tests, found
on page 4–5, and those under Functional Tests, found on page 4–7.
HA signal-path compensation must have been done within the recommended
calibration interval and at a temperature within ±5_ C of the present
operating temperature. (If at the time you did the prerequisite Self Tests, the
temperature was within the limits just stated, consider this prerequisite met).
HThe 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 either +45_ C for the TDS 600B or +50_ C for the
TDS 500D and 700D. (The warm-up requirement is usually met in the
course of meeting the Self Tests and Functional Tests prerequisites listed
above).
TDS 500D, TDS 600B and TDS 700D Service Manual
4–15
Performance Tests
Equipment Required
T able 4–1: Test equipment
Item number and
description
These procedures use external, traceable signal sources to directly check
warranted characteristics. The required equipment list follows this introduction.
27. Cable, Fiber OpticFC-FC fiber cableTektronix part number
174-2322-00
28. Optical-to-Electrical
Converter
P6701B (used with Option 3C) or
P6703B (used with Option 4C)
Tektronix part number
P6701B or P6703B
optical-to-electrical converter
1
You may replace items 9, 10, 11, 14, 15, 16, and 20 with a Wavetek 9100 (with options 100 and 600) for 500 MHz oscilloscopes, or a Wavetek 9500 (with option 100) and output head appropriate for the bandwidth of the oscilloscope(s) being
tested.
2
Requires a TM 500 or TM 5000 Series Power Module Mainframe.
3
Warning: The P6243 and P6245 probes that may be used with this oscilloscope provide an extremely low loading
capacitance (<1 pF) to ensure the best possible signal reproduction. These probes should not be used to measure
signals exceeding ±8 V , or errors in signal measurement will be observed. Above 40 V, damage to the probe may result.
To make measurements beyond ±8 V, use either the P6139A probe (good to 500 V), or refer to the catalog for a recommended probe.
4
If available, you may replace items 14, 15, and 16 with a Tegam/Tektronix SG5030 and its leveling head for bandwidths up
to 500 MHz, or a Tegam/Tektronix SG503 and SG504 with SG504 leveling head for bandwidths up to 1 GHz.
PurposeExampleMinimum requirements
Checking Analog Bandwidth
and Trigger Sensitivity
Checking Analog Bandwidth
Checking Analog Bandwidth
Checking Analog Bandwidth
Equipped Instruments Only
Used to Test Video Option 05
Equipped Instruments Only
Used to Test Video Option 05
2
Equipped Instruments Only
Used to Test Video Option 05
Equipped Instruments Only
Used to Test Video Option 05
Equipped Instruments Only
Checking Option 3C
Checking Option 4C
Checking Option 3C and 4C
Checking Option 3C and 4C
Checking Option 3C and 4C
TDS 500D, TDS 600B and TDS 700D Service Manual
4–17
Performance Tests
TDS 600B Test Record
Photocopy this and the next three pages and use them to record the performance
test results for your TDS 600B.
TDS 600B T est Record
Instrument Serial Number:Certificate Number:
Temperature:RH %:
Date of Calibration:Technician: