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.
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 the
product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
Injury Precautions
Use Proper Power Cord
Avoid Electric Overload
Ground the Product
Do Not Operate Without
Covers
Use Proper Fuse
Do Not Operate in
Wet/Damp Conditions
Do Not Operate in
Explosive Atmosphere
To avoid fire hazard, use only the power cord specified for this product.
To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is
outside the range specified for that terminal.
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.
To avoid electric shock or fire hazard, do not operate this product with covers or
panels removed.
To avoid fire hazard, use only the fuse type and rating specified for this product.
To avoid electric shock, do not operate this product in wet or damp conditions.
To avoid injury or fire hazard, do not operate this product in an explosive
atmosphere.
CSA Certification includes the products and power cords appropriate for use in
the North America power network. All other power cords supplied are approved
for the country of use.
This is the Performance Verification and Specifications for the TDS 500C,
TDS 600B, and TDS 700C Oscilloscopes. It contains procedures suitable for
determining if each instrument functions, was adjusted properly, and meets the
performance characteristics as warranted. The following models are covered:
TDS 500C:TDS 520C and TDS 540C
TDS 600B:TDS 620B, TDS 644B, TDS 680B, and TDS 684B
TDS 700C:TDS 724C, TDS 754C, and TDS 784C
This document also contains the technical specifications for these oscilloscopes.
The following documents are related to the use or service of this digitizing
oscilloscope:
HThe TDS 500C, TDS 600B & 700C User Manual describes how to use this
digitizing oscilloscope.
HThe TDS Family Programmer Manual describes using a computer to control
the digitizing oscilloscope through the GPIB interface.
HThe TDS 500C, TDS 600B & 700C Reference describes a quick overview of
how to operate your digitizing oscilloscope.
HThe TDS 500C, TDS 600B & 700C Service Manual describes information
for maintaining and servicing the digitizing oscilloscope to the module level.
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.
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 1–5.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 1–7.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 1–15, 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 1–16).
If you are not familiar with operating this oscilloscope, read the TDS 500C,
TDS 600B & TDS 700C Reference (070-9861-XX) or the TDS 500C, TDS 600B
& TDS 700C User Manual (070-9869-XX). These contain instructions that will
acquaint you with the use of the front-panel controls and the menu system.
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 540C, 644B, 684B, 754C, and 784C
TDS 520C, 620B, 680B, and 724CCh 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...”.
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 symbol at the left is accompanied by information you must read to do
the procedure properly.
HRefer to Figure 1–1: “Main menu” refers to the menu that labels the seven
menu buttons under the display; “side menu” refers to the menu that labels
the five buttons to the right of the display. “Pop-up menu” refers to a menu
that pops up when a main-menu button is pressed.
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
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 digitizing oscilloscope and allow a 20 minute warm-up
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
before doing this procedure.
d. Confirm no failures are found: Verify that no failures are found and
reported on-screen.
e. Confirm the three adjustment sections have passed status:
HPress SHIFT; then press UTILITY.
HHighlight Cal in the pop-up menu by repeatedly pressing the
main-menu button System. See Figure 1–2.
HVerify that the word Pass appears in the main menu under the
following menu labels: Voltage Reference, Frequency Response,
and Pulse Trigger. See Figure 1–2.
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 500C/700C 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 1–2.
1–6
Highlight Cal
1
3
Verify Pass
2
Verify Pass
Figure 1–2: Verifying adjustments and signal-path compensation
2. Return to regular service: Press CLEAR MENU to exit the system menus.
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 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), 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 Performance
Tests, which begin on page 1–15.
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 or P6139A
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 (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 1–3.
SignalGnd
Figure 1–3: 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.
1–8
HPress the front-panel button that corresponds to the channel you are
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 1–1 on page 1–3
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 500C and 700C only) displays an actively
acquiring waveform on-screen with the noise that was present in
Sample mode reduced.
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 or P6139A
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 1–3 on page 1–8.
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%.
1–10
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.
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, or P6139A
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 1–3 on page 1–8.
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).
One probe such as the P6243, P6245 or P6139A
One 720 K or 1.44 Mbyte, 3.5 inch DOS-compatible disk.
You can use a disk of your own or you can use the Programming
Examples Software 3.5 inch disk (Tektronix part number 063-1 134-XX)
contained in the TDS Family Programmer Manual (Tektronix part
number 070-9556-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 1–3 on page 1–8.
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
HTurn the general purpose knob to select the file to save. Choose
(or fd0:, the floppy disk drive, or hd0:, the optional
hard disk drive). 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
.
f.To test the optional hard disk drive, use the general purpose knob to
select the file to save. Then choose the hard disk drive (hd0:). 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 digitizing oscilloscope retrieved the saved setup from the
disk. Do this by noticing the horizontal SCALE for the M (main) time
base is again 200 s and the waveform shows only two cycles just as it
was when you saved the setup.
3. Remove the test hookup:
HDisconnect the probe from the channel input and the probe-compensa-
tion terminals.
HRemove the floppy disk from the floppy disk drive.
This section contains a collection of procedures for checking that the TDS 500C,
TDS 600B, and TDS 700C Digitizing 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 1–5. 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 digitizing oscilloscope.
HYou must have performed and passed the procedures under Self Tests, found
on page 1–5, and those under Functional Tests, found on page 1–7.
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 digitizing oscilloscope must have been last adjusted at an ambient
temperature between +20_ C and +30_ C, must have been operating for a
warm-up period of at least 20 minutes, and must be operating at an ambient
temperature between +4_ C and either +45_ C for the TDS 600B or +50_ C
for the TDS 500C and 700C. (The warm-up requirement is usually met in
the course of meeting the Self Tests and Functional Tests prerequisites listed
above).
These procedures use external, traceable signal sources to directly check
warranted characteristics. The required equipment list follows this introduction.
BNC input, male BNC output
50 , 36 in, male to male BNC
connectors
Female BNC to dual bananaTektronix part number
Variable amplitude to ±104 V; accuracy to 0.1%
amplitude; accuracy to 0.25%
to 10 ns; accuracy within 2 ppm
Tektronix part number
01 1-0059-02
Tektronix part number
01 1-0060-02
013-0076-00
Tektronix part number
01 1-0049-01
Tektronix part number
012-0482-00
103-0090-00
103-0030-00
067-0525-02
Data Precision 8200Checking DC Offset, Gain,
Wavetek 9100 with options
100 and 250 (or, optionally,
Tektronix PG 506A Calibration Generator
Wavetek 9100 with options
100 and 250 (or, optionally,
Tektronix TG 501A Time
Mark Generator
2
Tektronix part number
P6139A or P6245
Programming Examples
Software Disk (Tektronix part
number 063-1134-XX) that
comes with the TDS Family
Programmer Manual (Tektronix part number
070-9556-XX)
1
)
1)
Signal Attenuation
Signal Attenuation
Signal Coupling for Probe
Compensator Output Check
Signal Termination for
Channel Delay Test
Signal Interconnection
Various Accuracy Tests
Checking Trigger Sensitivity
Checking Delay Between
Channels
and Measurement Accuracy
To check accuracy of CH 3
30. Cable, Fibre OpticFC-FC fiber cable174-2322-00Checking Option 3C and 4C
31. Optical-to-Electrical
Converter
P6701B (used with Option 3C) or
P6703B (used with Option 4C)
Tektronix part number
P6701B or P6703B
Checking Option 3C and 4C
optical-to-electrical converter
1
Requires a TM 500 or TM 5000 Series Power Module Mainframe.
2
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.
3
You can replace items 19, 20, or 21 with a Tegam/Tektronix SG503 (item 25) or SG504 (item 26) – if available.
Delay Between Channels
Delay Between ChannelsN/A____________________50 ps
Time Base System
Long Term Sample Rate/
Delay Time @ 100 ns/10.0 ms
Trigger System Accuracy
Pulse-Glitch or Pulse-Width,
Hor. scale ≤ 1 ms
Lower Limit
Upper Limit
Pulse-Glitch or Pulse-Width,
Hor. scale > 1 ms
Lower Limit
Upper Limit
Main Trigger, DC Coupled, Positive Slope9.9393 V____________________10.1147 V
Main Trigger, DC Coupled, Negative Slope9.9393 V____________________10.1147 V
Delayed Trigger, DC Coupled, Positive Slope9.9393 V____________________10.1147 V
Delayed Trigger, DC Coupled, Negative Slope9.9393 V____________________10.1 147 V
CH1 Sensitivity, 50 MHz, MainPass/Fail____________________Pass/Fail
CH1 Sensitivity , 50 MHz, DelayedPass/Fail____________________Pass/Fail
CH1 AUX Trigger InputPass/Fail____________________Pass/Fail
CH1 Sensitivity , full bandwidth, MainPass/Fail____________________Pass/Fail
CH1 Sensitivity , full bandwidth, DelayedPass/Fail____________________Pass/Fail
Output Signal Checks
MAIN TRIGGER OUTPUT, 1 MW
These procedures check those characteristics that relate to the signal-acquisition
system and are listed as checked under Warranted Characteristics in Specifica-
tions.
Performance Tests
Check Offset Accuracy
(Zero Setting)
Equipment
required
PrerequisitesThe oscilloscope must meet the prerequisites listed on page 1–15.
1. Preset the instrument controls:
a. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
HPress CLEAR MENU to remove the menus from the screen.
b. Modify the default settings:
HPress SHIFT; then press ACQUIRE MENU.
HOn the TDS 600B, press the main-menu button Mode; then press the
side-menu button Average 16.
None
See Input Channels vs. Model on page 1–2.
HOn the TDS 500C and 700C, press the main-menu button Mode;
then press the side-menu button Hi Res.
HPress CURSOR.
HPress the main-menu button Function; then press the side-menu
button H Bars.
HPress CLEAR MENU.
HBe sure to disconnect any input signals from all four channels.
2. Confirm input channels are within limits for offset accuracy at zero offset:
Do the following substeps — test CH 1 first, skipping substep a since CH 1
is already set up to be checked from step 1.
a. Select an unchecked channel: Press WAVEFORM OFF to remove the
channel just confirmed from the display. Then, press the front-panel
button that corresponds to the channel you are to confirm.
Figure 1–4: Measurement of DC offset accuracy at zero setting
g. Test all channels: Repeat substeps a through f for all input channels.
3. Disconnect the hookup: No hookup was required.
WARNING. The generator is capable of outputting dangerous voltages. Be sure to
set the DC calibration generator to 0 volts before connecting, disconnecting,
and/or moving the test hookup during the performance of this procedure.
Equipment
required
PrerequisitesThe oscilloscope must meet the prerequisites listed on page 1–15
Two dual-banana connectors (Item 6)
One BNC T connector (Item 7)
One DC calibration generator (Item 9)
Two precision 50 W coaxial cables (Item 5)
1. Install the test hookup and preset the instrument controls:
a. Hook up the test-signal source:
HSet the output of a DC calibration generator to 0 volts.
HConnect the output of a DC calibration generator through a
dual-banana connector followed by a 50 W precision coaxial cable to
one side of a BNC T connector. See Figure 1–5.
HConnect the Sense output of the generator through a second
dual-banana connector followed by a 50 W precision coaxial cable to
the other side of the BNC T connector. Now connect the BNC T
connector to CH 1. See Figure 1–5.
Output Sense
DC Calibrator
Dual banana to
BNC adapters
Figure 1–5: Initial test hookup
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 the default settings:
50 coaxial cables
Digitizing Oscilloscope
BNC T
connector
1–30
HPress SHIFT; then press ACQUIRE MENU.
HPress the main-menu button Mode; then press the side-menu button
Average 16.
2. Confirm input channels are within limits for DC accuracy at maximum offset
and position: Do the following substeps — test CH 1 first, skipping substep
2a since CH 1 is already selected from step 1.
HUse the keypad to set vertical offset to the positive-polarity setting
listed in the table for the current vertical scale setting. The baseline
level will remain off screen.
HSet the generator to the level and polarity indicated in the table for
the vertical scale, position, and offset settings you have made. The
DC test level should appear on screen. (If it doesn’t return, the DC
accuracy check is failed for the current vertical scale setting of the
current channel).
e. Measure the test signal: Press CLEAR MENU. Read the measurement
results at the Mean measurement readout. See Figure 1–6.
Turn on the
measurement called
mean and read the
results here.
Figure 1–6: Measurement of DC accuracy at maximum offset and position
f.Check against limits:
HCHECK that the readout for the measurement Mean readout on
screen is within the limits listed for the current vertical scale and
position/offset/generator settings. Enter value on test record.
HRepeat substep d, reversing the polarity of the position, offset, and
generator settings as is listed in the table.
1–32
HCHECK that the Mean measurement readout on screen is within the
limits listed for the current vertical scale setting and position/offset/
generator settings. Enter value on test record.
HRepeat substeps c through f until all vertical scale settings, listed in
Table 1–3, are checked for the channel under test.
g. Test all channels: Repeat substeps a through f for all four channels.
3. Disconnect the hookup:
a. Set the generator output to 0 V.
b. Disconnect the cable from the generator output at the input connector of
the channel last tested.
Check Analog Bandwidth
Equipment
required
PrerequisitesSee page 1–15
One sine wave generator (Item 19)
One level meter and power sensor (Item 20)
One power splitter (Item 21)
One female N to male BNC adapter (Item 24)
Four male N to female BNC adapters (Item 23)
Two 50 precision cables (Item 5)
Attenuators (Items 1 and 2)
Optional: One high-frequency leveled sine wave generator and its
leveling head (Item 26) – replaces items 19, 20, 21, 23, 24, and 5
1. Install the test hookup and preset the instrument controls:
a. Initialize the oscilloscope:
HPress save/recall SETUP. Press the main-menu button Recall
Factory Setup; then press the side-menu button OK Confirm
Factory Init.
b. Modify the default settings:
HPress TRIGGER MENU.
HPress the main-menu button Coupling. Then press the side menu
button Noise Rej.
HTurn the horizontal SCALE knob to 50 ns. Press SHIFT; then press
ACQUIRE MENU.
HPress the main-menu button Mode; then press the side-menu button
Average 16.
HPress MEASURE. Press the main-menu button Level Setup; then
NOTE. Refer to the Sine Wave Generator Leveling Procedure on page 1–84 if
your sine wave generator does not have automatic output amplitude leveling.
c. Hook up the test-signal source: Connect the sine wave output of a
leveled sine wave generator to CH 1. Set the output of the generator to a
reference frequency of 10 MHz or less. See Figure 1–7. For the optional
setup using a leveled sine wave generator with a leveling head (item 26)
see Figure 1–8 and, if using this optional setup with the example
Tektronix SG 504, set the generator output to 6 MHz.
Sine Wave
Generator
Output
Figure 1–7: Initial test hookup
High Frequency Sine
Wave Generator
(example: Tek SG 504)
Output
Digitizing Oscilloscope
Digitizing Oscilloscope
Leveling head
1–34
Figure 1–8: Optional initial test hookup
2. Confirm the input channels are within limits for analog bandwidth: Do the
following substeps — test CH 1 first, skipping substeps a and b since CH 1
is already set up for testing from step 1.
a. Select an unchecked channel:
HPress WAVEFORM OFF to remove the channel just confirmed
HPress the side-menu button more, if needed, until the menu label
Frequency appears in the side menu (its icon is shown at the left).Press the side-menu button Frequency.
HPress the side-menu button more until the menu label Pk-Pk
appears in the side menu (its icon is shown at the left). Press the
side-menu button Pk-Pk.
HPress CLEAR MENU.
HSet the generator output so the CHx Pk-Pk readout equals the
reference amplitude in Table 1–4 that corresponds to the vertical
scale set in substep d.
HPress the front-panel button SET LEVEL TO 50% as necessary to
trigger a stable display. At full bandwidth, you may also want to
make small, manual adjustments to the trigger level. You can use the
TRIGGER LEVEL knob to do this. (Full bandwidth varies with
TDS model as is shown in Table 1–4).
f.Measure the test signal:
HSet the frequency of the generator, as shown on screen, to the test
frequency in Table 1–4 that corresponds to the vertical scale set in
substep d. See Figure 1–9.
HSet the horizontal SCALE to the horizontal scale setting in
Table 1–4 that corresponds to the vertical scale set in substep d.
Press SET LEVEL TO 50% as necessary to trigger the signal.
HRead the results at the CHx Pk-Pk readout, which will automatically
measure the amplitude of the test signal. See Figure 1–9.
HCHECK that the Pk-Pk readout on screen is within the limits listed
in Table 1–4 for the current vertical scale setting.
HEnter voltage on test record.
HWhen finished checking, set the horizontal SCALE back to the
50 ns setting.
STOP. Checking each channel’s bandwidth at all vertical scale settings is time
consuming and unnecessary. You may skip checking the remaining vertical scale
settings in Table 1–4 (that is, skip the following substep, h) if this digitizing
oscilloscope has performed as follows:
HPassed the 100 mV vertical scale setting just checked in this
procedure.
HPassed the Verify Internal Adjustment, Self Compensation, and
Diagnostics procedure found under Self Tests, on page 1–5.
NOTE. Passing the signal path compensation confirms the signal path for all
vertical scale settings for all channels. Passing the internal diagnostics ensures
that the factory-set adjustment constants that control the bandwidth for each
vertical scale setting have not changed.
h. Check remaining vertical scale settings against limits (optional):
HIf desired, finish checking the remaining vertical scale settings for
the channel under test by repeating substeps d through g for each of
the remaining scale settings listed in Table 1–4 for the channel under
test.
HWhen doing substep e, skip the subparts that turn on the CHx Pk-Pk
measurement until you check a new channel.
HInstall/remove attenuators between the generator leveling head and
the channel input as needed to obtain the six division reference
signals listed in the table.
Check Delay Between
Channels
i.Test all channels: Repeat substeps a through g for all four channels.
3. Disconnect the hookup: Disconnect the test hook up from the input
connector of the channel last tested.
Equipment
required
PrerequisitesSee page 1–15
One sine wave generator (Item 19, or optionally, item 25)
One precision 50 W coaxial cable (Item 5)
One 50 terminator (Item 4)
One dual-input coupler (Item 8)
See Input Channels vs. Model on page 1–2.
STOP. DO NOT use the vertical position knob to reposition any channel while
doing this check. To do so invalidates the test.
1. Install the test hookup and preset the instrument controls:
a. Initialize the front panel:
1–38
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
b. The horizontal SCALE should already be set to 500 ps. On the
TDS 784C, and 600B, now set it to 200 ps. On the TDS 520C, 540C,
724C, and 754C, push the front-panel ZOOM button, press the
side-menu On button, set the horizontal SCALE to 250 ps, and be sure
the vertical scale factor is kept at 1.0X and the horizontal scale factor is
2.0X.
c. Save a CH 2 waveform: Press CH 2. Be sure the vertical scale factor is
kept at 1.0X. Then press save/recall WAVEFORM. Now, press the
main-menu button Save Wfm; then press the side-menu button
To Ref 2.
d. Save CH 3 (AX1 on some TDS models) waveform:
HMove the coupler from CH 2 to CH 3 (AX1 on some TDS models),
so that CH 1 and CH 3 are driven. Press WAVEFORM OFF. PressCH 3. Be sure the vertical scale factor is kept at 1.0X. Then press
the side-menu button
To Ref 3.
e. Display all test signals:
HPress WAVEFORM OFF to remove CH 3 (AX1 on some TDS
models) from the display.
HDisplay the live waveform. Move the coupler from CH 3 to CH 4,
so that CH 1 and CH 4 are driven. (Use AX1 and AX2 instead of
CH3 and CH4 if your TDS model is so equipped). Press CH 4 to
display. Be sure the vertical scale factor is kept at 1.0X. See Figure
1–11 on page 1–41.
HDisplay the reference waveforms. To do this, press the front-panel
button MORE. Press the main-menu buttons Ref 2 and Ref 3. You
may notice their overlapping ground reference indicators. See
Figure 1–11 on page 1–41.
f.Measure the test signal:
HLocate the time reference points for these waveforms. Do this by
first identifying the point where the rising edge of the left-most
waveform crosses the center horizontal graticule line. Next, note the
corresponding time reference point for the right-most waveform. See
Figure 1–11 on page 1–41.
HPress CURSOR.
1–40
HPress the main-menu button Function; then press the side-menu
HAlign one V bar cursor to the time reference point of the left-most
waveform edge and the other cursor to the time reference point of the
right-most waveform edge by rotating the General Purpose knob.
(Press SELECT to switch between the two cursors). See Figure
1–11 on page 1–41.
HRead the measurement results at the D: cursor readout, not the @:
readout on screen.
Read results.
Display the waveforms.
4
1
2
Locate the time reference
points for these waveforms.
Align each cursor to the time
3
reference points
Figure 1–11: Measurement of channel delay – TDS 684B shown
g. Check against limits: CHECK that the cursor readout on screen is
≤100 ps for the TDS 600B or ≤50 ps for the TDS 500C/700C.
h. If the channel skew is within the limits, enter time on the test record and
proceed to step 3. Otherwise, proceed with steps i through p.
i.Use the cursors to measure the skew from CH1 to CH2, CH1 to CH3,
and CH1 to CH4 (use AX1 and AX2 instead of CH3 and CH4 if your
TDS model is so equipped). Write down these three numbers in the first
measurement column of Table 1–5. Note that these numbers may be
either positive or negative.
j.Repeat the procedure from step 1.c through 2.e.
k. Again use the cursors to measure the skew from CH1 to CH2, CH1 to
CH3, and CH1 to CH4. Write down these numbers in the second
measurement column of Table 1–5. Note that these numbers may be
either positive or negative.
l.Add the first CH1 to CH2 skew measurement to the second CH1 to CH2
skew measurement and divide the result by 2. Use Table 1–5.
m. Add the first CH1 to CH3 (AX1 on some TDS models) skew measure-
ment to the second CH1 to CH3 skew measurement and divide the result
by 2. Use Table 1–5.
n. Add the first CH1 to CH4 (AX2 on some TDS models) skew measure-
ment to the second CH1 to CH4 skew measurement and divide the result
by 2. Use Table 1–5.
o. Check against limits: CHECK that the largest of the three results from
steps l, m, and n is between –100 ps and + 100 ps for the TDS 600B or
between –50 ps and + 50 ps for the TDS 500C/700C.
p. Enter time on the test record.
T able 1–5: Delay between channels worksheet
Add first and
Coupling
CH1 to CH2
skew
CH1 to CH3
skew
CH1 to CH4
skew
First
measurement
Second
measurement
second
measurements
Divide sum
by 2
3. Disconnect the hookup: Disconnect the cable from the generator output at
These procedures check those characteristics that relate to the Main and Delayed
time base system and are listed as checked under Warranted Characteristics in
Specifications.
Performance Tests
Check Accuracy for
Long-Term Sample Rate,
Delay Time, and Delta
Time Measurements
Equipment
required
PrerequisitesSee page 1–15
Time Mark
Generator
One time-mark generator (Item 11)
One 50 , precision coaxial cable (Item 5)
Digitizing Oscilloscope
Output
50 coaxial cable
Figure 1–12: Initial test hookup
1. Install the test hookup and preset the instrument controls:
a. Hook up the test-signal source: Connect, through a 50 W precision
coaxial cable, the time-mark output of a time-mark generator to CH 1.
Set the output of the generator for 10 ms markers.
b. Initialize the oscilloscope:
HPress save/recall SETUP. Press the main-menu button Recall
Factory Setup. Press the side-menu button OK Confirm Factory
Init.
c. Modify the initialized front-panel control settings:
HSet the vertical SCALE to 200 mV (or 500 mV with the optional
Tektronix TG 501A Time Mark Generator).
HPress VERTICAL MENU; then press the main-menu button
Coupling. Press the side-menu button to toggle it to the 50
HUse the vertical POSITION knob to center the test signal on screen.
HSet the horizontal SCALE of the Main time base to 1 ms.
HPress TRIGGER MENU; then press the main-menu button Mode
& Holdoff. Press the side-menu button Normal.
2. Confirm Main and Delayed time bases are within limits for accuracies:
a. Display the test signal:
HAlign the trigger T to the center vertical graticule line by adjusting
the horizontal POSITION. See Figure 1–13 on page 1–45.
HPress HORIZONTAL MENU.
HSet horizontal modes. To do this, press the main-menu button Time
Base. Press the side-menu buttons Delayed Only and Delayed Runs
After Main. See Figure 1–13.
b. Measure the test signal:
HSet the horizontal SCALE of the D (delayed) time base to 500 ns for
the TDS 600B or to 100 ns for the TDS 500C/700C.
HSet delayed time to 10 ms. Do this on the keypad by pressing 10,
then SHIFT, then m followed by ENTER).
c. Check long-term sample rate and delay time accuracies against limits:
H CHECK that the rising edge of the marker crosses the center
horizontal graticule line at a point within either ±2.0 divisions, for
the TDS 600B, or ±2.5 divisions, for the TDS 500C/700C, of center
graticule. See Figure 1–13.
1. Install the test hookup and preset the instrument controls:
a. Initialize the instrument:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
b. Modify the default setup:
HPress VERTICAL MENU.
HPress the main-menu button Coupling; then press the side-menu
button to select 50 coupling.
HSet the horizontal SCALE to 10 ns on the TDS 600B and 12.5 ns on
the TDS 500C/700C.
c. Hook up the test-signal source: Connect the output of a
medium-frequency leveled sine wave generator (Item 25) to CH 1. Do
this through a 50 W precision coaxial cable, followed by a 10X
attenuator. See Figure 1–14.
Medium-Frequency
Sine Wave Generator
Output
10X Attenuator
50 coaxial cable
Digitizing Oscilloscope
Figure 1–14: Initial test hookup
2. Confirm the trigger system is within time-accuracy limits for pulse-glitch or
pulse-width triggering (Horizontal Scale ≤1 s):
a. Display the test signal: Set the output of the sine wave generator for a
100 MHz, five-division sine wave on screen. Press SET LEVEL TO50%.
HPress HORIZONTAL MENU.
HPress the main-menu button Time Base.
HPress the side-menu buttons Delayed Only and Delayed Trigger-
able.
HSet D (delayed) horizontal SCALE to 500 s.
b. Select the Delayed trigger system:
HPress SHIFT; then press the front-panel DELAYED TRIG button.
HPress the main-menu button Level.
c. Measure the test signal: Press the side-menu button SET TO 50%.
Read the measurement results in the side (or main) menu below the label
Level.
d. Check against limits: Do the following subparts in the order listed.
HCHECK that the Level readout in the side menu is within 9.863 V to
10.137 V, inclusive, for the TDS 600B or is within 9.9393 V to
10.1147 V, inclusive, for the TDS 500C/700C.
HEnter voltage on test record.
HPress the main-menu button Slope; then press the side-menu button
for negative slope. See icon at left. Press the main-menu button
Level. Repeat substep c.
HCHECK that the Level readout in the side menu is within 9.863 V to
10.137 V, inclusive, for the TDS 600B or is within 9.9393 V to
10.1147 V, inclusive, for the TDS 500C/700C.
HEnter voltage on test record.
4. Disconnect the hookup:
a. First set the output of the DC calibration generator to 0 volts.
b. Disconnect the cable from the generator output at the input connector of
One sine wave generator (Item 19 or, optionally, items 25 and 26)
Two precision 50 coaxial cables (Item 5)
One 10X attenuator (Item 1)
One BNC T connector (Item 7)
One 5X attenuator (Item 2)
1. Install the test hookup and preset the instrument controls:
a. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
b. Modify the initialized front-panel control settings:
HSet the horizontal SCALE for the M (main) time base to 20 ns on
the TDS 600B or 25 ns on the TDS 500C/700C.
HPress HORIZONTAL MENU; then press the main-menu button
Time Base.
HPress the side-menu button Delayed Only; then press the side-menu
button Delayed Triggerable.
HSet the horizontal SCALE for the D (delayed) time base to 20 ns on
the TDS 600B or 25 ns on the TDS 500C/700C; then press the
side-menu button Main Only.
HPress TRIGGER MENU; then press the main-menu button Mode
& Holdoff. Press the side-menu button Normal.
HPress VERTICAL MENU; then press the main-menu button
Coupling. Press the side-menu button to select the 50 W setting.
HPress SHIFT; then press ACQUIRE MENU. Press the main-menu
button Mode; then press the side-menu button Average 16.
c. Hook up the test-signal source:
HConnect the signal output of a medium-frequency sine wave
generator (item 19 or, optionally, item 25) to a BNC T connector.
Connect one output of the T connector to CH 1 through a 50 W
precision coaxial cable. Connect the other output of the T connector
to the AUX TRIG INPUT
2. Confirm Main and Delayed trigger systems are within sensitivity limits
(50 MHz):
a. Display the test signal:
HSet the generator frequency to 50 MHz.
HPress MEASURE.
HPress the main-menu button Level Setup; then press the side-menu
button Min-Max.
HPress the main-menu button Select Measrmnt for Ch1.
HPress the side-menu button –more– until Amplitude appears in the
side menu (its icon is shown at the left). Press the side-menu button
Amplitude.
HPress SET LEVEL TO 50%.
HPress CLEAR MENU.
HSet the test signal amplitude for about three and a half divisions on
screen. Now fine adjust the generator output until the CH 1
Amplitude readout indicates the amplitude is 350 mV. Readout may
fluctuate around 350 mV.
HDisconnect the 50 W precision coaxial cable at CH 1 and reconnect
it to CH 1 through a 10X attenuator.
b. Check the Main trigger system for stable triggering at limits:
HRead the following definition: A stable trigger is one that is
consistent; that is, one that results in a uniform, regular display
triggered on the selected slope (positive or negative). This display
should not have its trigger point switching between opposite slopes,
nor should it roll across the screen. At horizontal scale settings of
2 ms/division and faster, TRIG’D will remain constantly lighted. It
will flash for slower settings.
HPress TRIGGER MENU; then press the main-menu button Slope.
HPress SET LEVEL TO 50%. Adjust the TRIGGER LEVEL knob
so that the TRIG’D light is on. Set the level to near the middle of
the range where the TRIG’D light is on. CHECK that the trigger is
stable for the test waveform on both the positive and negative slopes.
Use the side menu to switch between trigger slopes.
HEnter pass/fail result for main trigger on the test record.
HLeave the Main trigger system triggered on the positive slope of the
waveform before continuing to the next step.
Check if stable trigger.
Figure 1–19: Measurement of trigger sensitivity — 50 MHz results shown on a
TDS 684B screen
c. Check Delayed trigger system for stable triggering at limits: Do the
following subparts in the order listed.
HPress HORIZONTAL MENU; then press the main-menu button
Time Base. Press the side-menu button Delayed Only; then press
Delayed Triggerable in the same menu.
HPress SHIFT; then press DELAYED TRIG. Press the main-menu
button Level.
HPress the side-menu button SET TO 50%.
CHECK that a stable trigger is obtained for the test waveform for
both the positive and negative slopes of the waveform. Use the
TRIGGER LEVEL knob to stabilize the Main trigger. Use the
general purpose knob to stabilize the Delayed trigger. Press the
main-menu button Slope; then use the side menu to switch between
trigger slopes. See Figure 1–19.
HEnter pass/fail result for delayed trigger on the test record.
HLeave the Delayed trigger system triggered on the positive slope of
the waveform before continuing to the next step. Also, return to the
main time base: Press HORIZONTAL MENU; then press the
main-menu button Time Base. Press the side-menu button MainOnly.
HPress CLEAR MENU.
3. Confirm the AUX Trigger input:
a. Display the test signal:
HRemove the 10X attenuator and reconnect the cable to CH 1.
HSet the test signal amplitude for about 2.5 divisions on screen.
HNow fine adjust the generator output until the CH 1 Amplitude
readout indicates the amplitude is 250 mV. (Readout may fluctuate
around 250 mV).
b. Check the AUX trigger source for stable triggering at limits: Do the
following in the order listed.
HUse the definition for stable trigger from step 2.
HPress TRIGGER MENU; then press the main-menu button Source.
HPress the side-menu button –more– until the side-menu label
DC Aux appears; then press DC Aux.
HPress SET LEVEL TO 50%. CHECK that a stable trigger is
obtained for the test waveform on both the positive and negative
slopes. Press the main-menu button Slope; then use the side menu to
switch between trigger slopes. Use the TRIGGER LEVEL knob to
stabilize the trigger if required.
The procedure that follows checks those characteristics of the output signals that
are listed as checked under Warranted Characteristics in Specifications. The
oscilloscope outputs these signals at its front and rear panels.
Check Outputs — CH 3
(AX1 on some models)
Main and Delayed Trigger
Equipment
required
PrerequisitesSee page 1–15. Also, the digitizing oscilloscope must have passed
Two 50 precision cables (Item 5)
One calibration generator (Item 10)
Check DC Voltage Measurement Accuracy on page 1–29.
See Input Channels vs. Model on page 1–2.
1. Install the test hookup and preset the instrument controls:
Calibration
Generator
To MAIN
TRIGGER
OUT
Digitizing Oscilloscope
50 coaxial cables
Figure 1–20: Initial test hookup
1–58
a. Hook up test-signal source 1:
HConnect the standard amplitude output of a calibration generator
through a 50 W precision coaxial cable to CH 3 (AX1 on some TDS
models).
HSet the output of the calibration generator to 0.500 V.
b. Hook up test-signal source 2: Connect the Main Trigger Out at the rear
panel to CH 2 through a 50 W precision cable.
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 the initialized front-panel control settings:
HSet the horizontal SCALE to 200 ms.
HPress SHIFT; then press ACQUIRE MENU.
HPress the main-menu button Mode; then press the side-menu button
Average.
HSelect 64 averages. Do this with the keypad or the general purpose
knob
2. Confirm Main and Delayed Trigger outputs are within limits for logic levels:
a. Display the test signal:
HPress WAVEFORM OFF to turn off CH 1.
HPress CH 2 to display that channel.
HSet the vertical SCALE to 1 V.
HUse the vertical POSITION knob to center the display on screen.
b. Measure logic levels:
HPress MEASURE; then press the main-menu button Select
Measurement for Ch2.
HSelect high and low measurements. To do this, repeatedly press the
side-menu button –more– until High and Low appear in the side
menu (their icons are shown at the left). Press both side-menu
buttons High and Low.
c. Check Main Trigger output against limits:
HCHECK that the Ch2 High readout is ≥2.5 volts and that the Ch2
Low readout is ≤0.7 volts. See Figure 1–21.
HEnter high and low voltages on test record.
HPress VERTICAL MENU; then press the main-menu button
Coupling. Now press the side-menu button to toggle it to the
50 W setting.
HCHECK that the Ch2 High readout is ≥1.0 volt and that the Ch2
Figure 1–21: Measurement of main trigger out limits
d. Check Delayed Trigger output against limits: See Figure 1–21.
HMove the precision 50 W cable from the rear-panel Main Trigger
Output BNC to the rear-panel Delayed Trigger Output BNC.
HCHECK that the Ch2 High readout is ≥1.0 volt and that the Ch2
Low readout ≤0.25 volts.
HEnter high and low voltages on test record.
HPress the side-menu button to select the 1 MW setting.
HPress CLEAR MENU.
HCHECK that the Ch2 High readout is ≥2.5 volts and that the Ch2
Low readout is ≤0.7 volts.
HEnter high and low voltages on test record.
3. Confirm CH 3 (Ax1 on some TDS models) output is within limits for gain:
a. Measure gain:
1–60
HMove the precision 50 W cable from the rear-panel DELAYED
TRIGGER OUTPUT BNC to the rear-panel SIGNAL OUT BNC.
PrerequisitesSee page 1–15. Also, the digitizing oscilloscope must have passed
One female BNC to clip adapter (Item 3)
Two dual-banana connectors (Item 6)
One BNC T connector (Item 7)
Two 50 precision cables (Item 5)
One DC calibration generator (Item 9)
Check Accuracy For Long-T erm Sample Rate, Delay Time, and Delta
Time Measurements on page 1–43.
1. Install the test hookup and preset the instrument controls:
a. Hook up test-signal:
HConnect one of the 50 W cables to CH 1. See Figure 1–22.
HConnect the other end of the cable just installed to the female
BNC-to-clips adapter. See Figure 1–22.
HConnect the red clip on the adapter just installed to the PROBE
COMPENSATION SIGNAL on the front panel; connect the blackclip to PROBE COMPENSATION GND. See Figure 1–22.
Digitizing Oscilloscope
50 coaxial cable
Figure 1–22: Initial test hookup
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 the initialized front-panel control settings:
HSet the horizontal SCALE to 200 s.
HPress SET LEVEL TO 50%.
HUse the vertical POSITION knob to center the display on screen.
HPress SHIFT; then press ACQUIRE MENU.
HPress the main-menu button Mode; then press the side-menu button
Average.
HSelect 128 averages with the keypad or the general purpose knob.
2. Confirm that the Probe Compensator signal is within limits for frequency:
a. Measure the frequency of the probe compensation signal:
HPress MEASURE; then press the main-menu button Select
Measrmnt for Ch1.
HRepeatedly press the side-menu button –more– until Frequency
appears in the side menu (its icon is shown at the left). Press the
side-menu button Frequency.
b. Check against limits:
HCHECK that the CH 1 Freq readout is within 950 Hz to 1.050 kHz,
inclusive. See Figure 1–23.
HEnter frequency on test record.
HPress MEASURE; then press the main-menu button Remove
HConnect the Sense output of the generator through a second
dual-banana connector followed by a 50 W precision coaxial cable to
the other side of the BNC T connector. Now connect the BNC T
connector to CH 1. See Figure 1–24.
DC Calibrator
Dual banana to
BNC adapters
50 coaxial cables
Figure 1–24: Subsequent test hookup
Performance Tests
Digitizing Oscilloscope
BNC T
connector
e. Measure amplitude of the probe compensation signal:
HPress SHIFT; then press ACQUIRE MENU. Press the side-menu
button AVERAGE then enter 16 using the keypad or the general
purpose knob.
HAdjust the output of the DC calibration generator until it precisely
overlaps the top (upper) level of the stored probe compensation
signal. (This value will be near 500 mV).
HRecord the setting of the DC generator.
HAdjust the output of the DC calibration generator until it precisely
overlaps the base (lower) level of the stored probe compensation
signal. (This value will be near zero volts).
HRecord the setting of the DC generator.
f.Press CLEAR MENU to remove the menus from the display. See
PrerequisitesSee page 1–15. These prerequisites include running the signal path
PAL signal source (Item 14)
60 Hz. sine wave generator (Item 15)
Pulse generator (Item 16)
Two 75 cables (Item 17)
Two 75 terminators (Item 18)
One BNC T connector (Item 7)
50 cable (Item 5)
50 terminator (Item 4)
compensation routine.
1. Set up digitizing oscilloscope to factory defaults by completing the following
steps:
a. Press save/recall SETUP.
b. Press the main-menu Recall Factory Setup.
c. Press the side-menu OK Confirm Factory Init.
d. Wait for the Clock Icon to leave the screen.
e. CONFIRM the digitizing oscilloscope is setup as shown below.
2. Set up digitizing oscilloscope for TV triggers by completing the following
steps:
a. Press TRIGGER MENU.
b. Press the main-menu Type pop-up until you select Video.
c. Press the main-menu Standard pop-up until you select 625/PAL.
d. Press the main-menu Line.
e. Use the keypad to set the line number to 7 (press 7, then ENTER).
f.Press VERTICAL MENU.
g. Press the main-menu Bandwidth.
h. Select 250 MHz from the side menu.
i.Press the main-menu Fine Scale.
j.Use the keypad to set the fine scale to 282mV (press 282, SHIFT, m,
then ENTER).
k. Press HORIZONTAL MENU.
l.Press the main-menu Horiz Scale.
m. Use the keypad to set the horizontal scale to 200 ns (press 200, SHIFT,
n, then ENTER).
3. Check Jitter vs. Signal Amplitude
a. Set up equipment for Jitter Test. See Figure 1–26.
HConnect one of the rear panel composite outputs marked COMPST
on the TSG121 through a 75 W cable and a 75 W terminator to the
CH1 input of the TDS.
HPress the 100% FIELD control (the fourth TSG121 front-panel
button from the left) of the PAL signal source.
PAL Signal
Source
COMPST
75 cable
Digitizing Oscilloscope
75 terminator
Figure 1–26: Jitter test hookup
b. CHECK that the oscilloscope lights up its front panel TRIG’D LED and
it displays the waveform on screen. See Figure 1–27.
Figure 1–27: Jitter test displayed waveform – TDS 684B shown
c. Press SHIFT; then press ACQUIRE MENU.
d. Press the main-menu Mode.
e. Select the side-menu Average. It should be already set to 16.
f.Press the main-menu Create Limit Test Template.
g. Press the side-menu V Limit.
h. Use the keypad to set V Limit to 180 mdiv (press 180, SHIFT, m, then
ENTER).
i.Press the side-menu OK Store Template.
j.Press MORE.
k. Press the main-menu Ref1.
l.Press CH1.
m. Press SHIFT; then press ACQUIRE MENU.
n. Press the main-menu Limit Test Setup.
o. Toggle the side-menu Limit Test to ON.
p. Toggle the side-menu Ring Bell if Condition Met to ON.
q. Press the main-menu Mode.
r. Press the side-menu Envelope.
s.Use the keypad to set envelope to use 100 acquisitions (press 100, then
ENTER).
t.Press the main-menu Stop After button.
u. Press the side-menu Single Acquisition Sequence.
v. Confirm that the oscilloscope successfully makes 100 acquisitions. If not
successful, the oscilloscope bell will ring. When the word Run in the top
left corner of the display changes to STOP, the test is complete. See
Figure 1–28.
Stop shows test complete
Figure 1–28: Jitter test when completed – TDS 684B shown
w. Press the main-menu Limit Test Setup.
x. Toggle the side-menu Ring Bell if Condition Met to OFF.
y. Toggle the side-menu Limit Test to OFF.
1–70
4. Check Triggered Signal Range.
Set up oscilloscope for Triggered Signal Test.
a. Press MORE.
b. Press WAVEFORM OFF.
c. Press HORIZONTAL MENU.
d. Use the keypad to set horizontal scale (/div) to 50 s (press 50, SHIFT,
m, then ENTER).
e. Press SHIFT; then press ACQUIRE MENU.
f.Press the main-menu Stop After.
g. Press the side-menu RUN/STOP button only.
h. Press the main-menu Mode.
i.Press the side-menu Sample.
j.Press RUN/STOP.
k. Press VERTICAL MENU.
l.Use the keypad to set fine scale to 300 mV (press 300, SHIFT, m, then
ENTER).
m. CONFIRM that the TRIG’D LED stays lighted and that the waveform
on screen is stable. That is, it does not move horizontally or vertically.
Also, CONFIRM that the waveform on the screen has one positive pulse
n. Use the keypad to set the fine scale to 75 mV (press 75, SHIFT, m, then
ENTER).
o. CONFIRM that the TRIG’D LED stays lighted and that the waveform
on screen is stable. That is, it does not move horizontally or vertically.
Also, CONFIRM that the waveform on the screen has one positive pulse
and a number of negative pulses. See Figure 1–30.
p. Disconnect all test equipment (TSG121) from the digitizing oscillo-
scope.
5. Check 60 Hz Rejection.
a. Set up oscilloscope for 60 Hz Rejection Test:
HUse the keypad to set the Ch1 Fine Scale to 282 mV (press 282,
SHIFT m, then ENTER).
HPress WAVEFORM OFF.
HPress CH2.
HPress VERTICAL MENU.
HUse the keypad set the fine scale to 2 V (press 2, then ENTER).
HPress HORIZONTAL MENU.
HUse the keypad to set the horizontal scale (/div) to 5 ms (press 5,
SHIFT, m, then ENTER).
b. Set up 60 Hz signal generator:
HConnect the output of the signal generator to the CH2 input through
HReconnect the output of the signal generator. Connect the composite
signal connector of the PAL signal source (labeled COMPST on the
TSG 121) to a 75 W cable and a 75 W terminator. Connect both
signals to the CH1 input through a BNC T. See Figure 1–33.
HPress VERTICAL MENU.
HIf needed, press the main-menu Fine Scale.
HUse the keypad to set fine scale to 500 mV (press 500, SHIFT, m,
then ENTER).
HConnect another composite signal connector of the PAL signal
source (labeled COMPST on the TSG 121) through a 75 W cable
and a 75 W terminator to the CH2 input. See Figure 1–33.
PAL signal
source
Signal Generator
COMPST
Output
COMPST
Figure 1–33: Subsequent 60 Hz Rejection test hookup
HCONFIRM that the TRIG’D LED stays lighted and that the
waveform on screen is stable. In other words, be sure the waveform
does not move horizontally or vertically. Also, confirm that the
waveform on the screen has one positive pulse and a number of
negative pulses. See Figure 1–34.
Digitizing Oscilloscope
75 terminators
75 Cable
BNC T connector
50 cable
75 cable
HDisconnect all test equipment from the digitizing oscilloscope.
Figure 1–34: 60 Hz Rejection test result – TDS 684B shown
6. Check Line Count Accuracy.
a. Set up oscilloscope for Line Count Accuracy Test:
HPress WAVEFORM OFF.
HPress CH1.
HPress HORIZONTAL MENU.
HPress the main-menu Record Length.
HPress the side-menu –more– until you see the appropriate menu.
HPress the side-menu 5000 points in 100divs.
HPress the main-menu Horiz Scale (/div).
HUse the keypad to set the horizontal scale to 200 ns (press 200,
SHIFT, n, then ENTER).
b. Check Line Count Accuracy:
HConnect a composite output signal from the rear of the PAL signal
source (labeled COMPST on the TSG 121) to the CH1 input
through a 75 W cable and a 75 W terminator. See Figure 1–35.
HPress the side-menu Fields.
HUse the keypad to set the number of fields to 1 (press 1, then
ENTER).
HPress the side-menu Sync Width.
HUse the keypad to set the width to 400 ns (press 400, SHIFT, n,
then ENTER).
HPress the side-menu –more– 1 of 2. Then press V1 Start Time.
HUse the keypad to set V1 start time to 10.10 s (press 10.10, SHIFT,
m, then ENTER).
HPress the side-menu V1 Stop Time.
HUse the keypad to set V1 stop time to 10.50 s (press 10.50, SHIFT,
m, then ENTER).
HPress the main-menu Type pop-up to select Edge.
HPress HORIZONTAL MENU.
HPress the main-menu Record Length.
HSelect the side-menu 1000 points in 20div. If needed, first press the
side-menu –more– until you see the appropriate side-menu item.
HTurn the HORIZONTAL POSITION knob to position the trigger
‘T’ two divisions to the left of the center screen.
HPress MEASURE.
HIf needed, press the main-menu Select Measrmnt.
HPress the side-menu Negative Width.
HPress the side-menu Period.
b. Set up the pulse generator for Sync Duty Cycle Test:
HSet PULSE DURATION to 50 ns.
HSet PERIOD to 10 s.
HSet OUTPUT (VOLTS) to –1 for LOW LEVEL and +1 for HIGH
LEVEL.
1–80
HDepress the COMPLEMENT button.
HBe sure BACK TERM is depressed (in).
HTurn the pulse generator PULSE DURATION variable control to
adjust the negative pulse so the oscilloscope’s CH1 – Width
measurement displays 400ns +/–10 ns.
HTurn the HORIZONTAL SCALE knob to set the oscilloscope time
base to 5ms/div.
HTurn the pulse generator PERIOD variable control to adjust the
period until the oscilloscope CH1 Period measurement reads
21.000ms –25/+50 ns. See Figure 1–40. Read note shown below.
NOTE. The pulse duration and period adjustments are critical in making this
measurement. If the pulse duration and/or the duty cycle are not stable, the
FLEXFMT function may not function. You must take care when making these
adjustments.
HDisconnect the signal source from CH1, wait a few seconds, then
reconnect the signal.
HCONFIRM that the TRIG’D LED is lighted and the waveform is
stable.
HDisconnect all test equipment from the digitizing oscilloscope.
HPress save/recall SETUP, the main-menu button Recall Factory
Setup, and the side-menu OK Confirm Factory Init.
Sine Wave Generator Leveling Procedure
Some procedures in this manual require a sine wave generator to produce the
necessary test signals. If you do not have a leveled sine wave generator, use one
of the following procedures to level the output amplitude of your sine
wave generator.
Equipment
required
PrerequisitesSee page 1–15
Sine wave generator (Item 19)
Level meter and power sensor (Item 20)
Power splitter (Item 21)
Two male N to female BNC adapters (Item 23)
One precision coaxial cable (Item 5)