that in all previously published material. Specifications and price change privileges reserved.
T ektronix, Inc., P.O. Box 500, Beaverton, OR 97077
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 this
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.
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.
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.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Observe All T erminal 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.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Use Proper Power Source. Do not operate this product from a power source that
applies more than the voltage specified.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Electrostatic Discharge. Acquisition circuitry in the TDS 694C/794D is very
susceptible to damage from electrostatic discharge and from overdrive signals.
To prevent electrostatic damage to the TDS 694C/794D, be sure to operate the
oscilloscope only in a static-controlled environment. Be sure to discharge to
ground any electrostatic charge that may be present on cables and probes before
attaching them to the oscilloscope.
To prevent damage from electrostatic discharge, install short-circuit terminations
on unused input connectors. Always use a wrist strap with internal impedance
(provided with your instrument) when handling your oscilloscope or making
connections.
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.
Certifications and
Compliances
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) Terminal
CAUTION
Refer to Manual
Double
Insulated
CSA Certified Power Cords. 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 500D,
TDS 600C, TDS 700D, and TDS 714L 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 500:TDS 520D, TDS 540D and TDS 580D
TDS 600:TDS 654C, TDS 680C, TDS 684C and TDS 694C
TDS 700:TDS 714L, TDS 724D, TDS 754D, TDS 784D, and
TDS 794D
This document also contains the technical specifications for these oscilloscopes.
The following documents are related to the use or service of this oscilloscope:
HThe TDS 500D, TDS 600B & TDS 700D User Manual describes how to use
this oscilloscope.
HThe TDS Family Programmer Disk, included with the User Manual,
describes using a computer to control the oscilloscope through the GPIB
interface.
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 1–17, 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 1–18).
If you are not familiar with operating this oscilloscope, read the oscilloscope
reference or user manuals. 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 520D, 680C, 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...”.
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 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 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:
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 to fifteen minutes to run.
While it progresses, a “clock” icon (shown at left) is displayed onscreen. 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
word Pass 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, P6245, P6249 and 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 694C & 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.
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 1–17.
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.
P6139A probe is not appropriate for the TDS694C/794D oscilloscopes.
One probe such as the P6243, P6245, P6249, P6139A1, 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 (typically black) to PROBE COMPENSA-TION GND. If using a P6243, P6245 or P6249 probe, you may want to
attach a Y-lead connector and two SMD KlipChips as shown in
Figure 1–3.
1–8
SignalGnd
Figure 1–3: Universal test hookup for functional tests – TDS 600C 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 substepa 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.
HPress the front-panel button that corresponds to the channel you are
to verify.
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 ms. 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 500D and 700D/L 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.
Verify the Time Base
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.
Equipment
required
PrerequisitesNone
1
P6139A probe is not appropriate for the TDS694C/794D oscilloscopes.
One probe such as the P6243, P6245, P6249, P6139A1, 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 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
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE to 200 ms.
HPress SET LEVEL TO 50%.
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 ms 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 ms returns the period to about five divisions.
c. The horizontal POSITION knob positions the signal left and right
on-screen when rotated.
Verify the Main and
Delayed Trigger Systems
3. Remove the test hookup: Disconnect the probe from the channel input and
the probe-compensation terminals.
Equipment
required
PrerequisitesNone
1
P6139A probe is not appropriate for the TDS694C/794D oscilloscopes.
One probe such as the P6243, P6245, P6249, P6139A1, 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 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 ms.
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).
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 ms.
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).
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE for the M (main) time base to 200 ms.
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.
HTurn the general purpose knob to select the file to save. Choose
TEK?????.SET (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 TEK, then containing
5-numbers, and a .SET extension. For example, the first time you
run this on a blank, formatted disk or on the Example Programs
Disk, the oscilloscope will assign the name TEK00000.SET to your
file. If you ran the procedure again, the oscilloscope would
increment the name and call the file TEK00001.SET.
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 ms time base and
the five cycle waveform.
HPress the main-menu button Recall Saved Setup; then press the
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 ms 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 500D,
TDS 600C, TDS 700D, and TDS 714L 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 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 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 temperatures as follows: +4_ C to +40_ C for the TDS 694C, +4_ C to +45_ C for
other TDS 600C and 0_ C to +50_ C for the TDS 500D, TDS 700D, and
TDS 714L. (The warm-up requirement is usually met in the course of
meeting the Self Tests and Functional Tests prerequisites listed above).
Procedures starting on page 1–35, use external, traceable signal sources to
directly check warranted characteristics. Table 1–1 lists the required equipment.
35. Cable, Fiber OpticFC-FC fiber cableTektronix part number
174-2322-00
36. 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 22 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. For 3 GHz oscilloscopes use a Wavetek 9530 head.
2
P6139A probe is not appropriate for the TDS694C/794D oscilloscopes.
3
Requires a TM 500 or TM 5000 Series Power Module Mainframe. For Delta Time Measurement Accuracy use a
Wavetek 9500 or a pulse generator with a rise time as shown in Table 1–6 on page 1–58.
4
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. P6139A is not an appropriate probe for the TDS 694C or TDS 794D oscilloscopes.
5
If available, you may replace items 14, 15, and 16 with the following set of equipment for bandwidths up to 1 GHz:
a Tegam/Tektronix SG503 and SG504 with SG504 leveling head.
Photocopy this and the next three pages and use them to record the performance
test results for your TDS 600C. The TDS 694C Test Record begins on
page 1–29.
TDS 600C T est Record
Instrument Serial Number:Certificate Number:
Temperature:RH %:
Date of Calibration:Technician:
Photocopy this and the next three pages and use them to record the performance
test results for your TDS 500D/700D/714L. The TDS 794D Test Record begins
on page 1–32.
TDS 500D/700D/714L T est Record
Instrument Serial Number:Certificate Number:
Temperature:RH %:
Date of Calibration:Technician:
These procedures check those characteristics that relate to the signal-acquisition
system and are listed as checked under Warranted Characteristics in Specifica-tions. Refer to Table 1–1 on page 1–18 for test equipment specifications.
Performance Tests
Check Offset Accuracy
(Zero Setting)
Equipment
required
PrerequisitesThe oscilloscope must meet the prerequisites listed on page 1–17.
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 600C, press the main-menu button Mode; then press the
side-menu button Average 16.
None
See Input Channels versus Model on page 1–2.
HOn the TDS 500D, 700D and 714L, 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.
WARNING. The generator is capable of outputting dangerous voltages. Be sure to
set the DC calibration generator to off or 0 volts before connecting, disconnecting, and/or moving the test hookup during the performance of this procedure.
Also, check that the calibrator does not have shorting straps installed between
the DC and sense outputs or grounds.
Equipment
required
PrerequisitesThe oscilloscope must meet the prerequisites listed on page 1–17
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)
See Input Channels versus Model on page 1–2.
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 off or 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.
HPress VERTICAL MENU. Press the main-menu button Position.
HUse the keypad to set vertical position to –5 divisions (press –5, then
ENTER, on the keypad). The baseline level will move off screen.
HPress the main-menu button Offset.
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 has 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.
One sine wave generator (Item 14)
One level meter and power sensor (Item 15)
One power divider (Item 16)
One female N to male BNC adapter (Item 18)
Four male N to female BNC adapters (Item 17)
Two 50 W precision cables (Item 5)
Attenuators (Items 1 and 2)
Optional: One high-frequency leveled sine wave generator and its
leveling head – replaces items 14, 15, 16, 17, and 18
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:
HTurn the horizontal SCALE knob to 50 ns (TDS694C 40 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
press the side-menu button Min-Max.
NOTE. The sine wave generator output amplitude must be leveled to within
0.35 db of the reference frequency (10 MHz) through the bandwidth frequency
listed in Table 1–4 on page 1–45. The 0.35 db requirement is necessary to ensure
a bandwidth that meets Tektronix specifications.
You can perform bandwidth PV using an unleveled sine wave generator (with
amplitude error > 0.35 db). Under these conditions, the bandwidth PV is subject
to the flatness errors associated with the generator used.
Refer to the Sine Wave Generator Leveling Procedure on page 1–94 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, 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
Performance Tests
Oscilloscope
Oscilloscope
Output
Leveling head
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
from display.
HPress the front-panel button that corresponds to the channel you are
to confirm.
HMove the leveling output of the sine wave generator to the channel
If your generator cannot output 6 divisions of amplitude, determine its maximum output at the Test frequency, and use this for
the reference amplitude. The –3 db limit can be calculated as: 0.707 reference amplitude.
amplitude
(6 divisions)
1
1
Horizontal
scale
1 ns3 GHz2 GHz1 GHz500 MHz500 MHz≥2.12 V
1 ns3 GHz2 GHz1 GHz500 MHz500 MHz≥4.24 V
TDS694CTDS794D
TDS680C
TDS684C
TDS784D
TDS654C
TDS540D
TDS714L
TDS724D
TDS754D
–3 db Limits
1
1
f.Display the test signal: Do the following subparts to first display the
reference signal and then the test signal.
HPress MEASURE; then press the main-menu button Select
Measrmnt for CHx.
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
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, i) if this 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.
i.Check remaining vertical scale settings against limits (optional):
Check Delay Between
Channels
HIf desired, finish checking the remaining vertical scale settings for
the channel under test by repeating substeps d through h for each of
the remaining scale settings listed in Table 1–4 for the channel under
test.
HWhen doing substep f, 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.
j.Test all channels: Repeat substeps a through h for all four channels.
3. Disconnect the hookup: Disconnect the test hook up from the input
connector of the channel last tested.
Equipment
required
One sine wave generator (Item 14)
Three precision 50 W coaxial cables (Item 5)
One power divider (Item 16) or dual input coupler (item 8)
3 SMA male to male adapter connector (Item 19)
3 SMA female-to-male BNC adapter connector (Item 20)
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:
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:
HDo not adjust the vertical position of any channel during this
procedure.
HSet the horizontal SCALE to 500 ps.
HPress SHIFT; then press ACQUIRE MENU.
HPress the main-menu button Mode, and then press the side-menu
button Average 16.
c. Hook up the test-signal source:
HConnect the sine wave output of a sine wave generator to a 50 W
precision coaxial cable followed by a 50 W termination and a
dual-input coupler. (If checking a TDS694C or TDS794C, substitute
a 50 W power divider and two 50 W coaxial cables for the 50 W
termination and dual-input coupler).
HConnect the coupler to both CH 1 and CH 2. See Figure 1–10.
2. Confirm all four channels are within limits for channel delay:
a. Set up the generator: Set the generator frequency to 250 MHz and the
amplitude for six to eight divisions in CH 1.
Hint: As you are adjusting the generator amplitude, push SET LEVEL
TO 50% frequently to speed up the updating of the waveform amplitude
on screen.
b. The horizontal SCALE should already be set to 500 ps. On the
TDS 580D, 784D, 794D, and all TDS 600C, now set it to 200 ps. On the
TDS 520D, 540D, 714L, 724D, and 754D, 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 for the remainder of this check.
c. Save a CH 2 waveform: Press CH 2. 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 (AUX1 on some TDS
models), so that CH 1 and CH 3 are driven. Press WAVEFORM
OFF. Press CH 3. 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
HDisplay the live waveform. Move the coupler from CH 3 to CH 4,
so that CH 1 and CH 4 are driven. (Use AUX1 and AUX2 instead of
CH3 and CH4 if your TDS model is so equipped). Press CH 4 to
display. See Figure 1–11 on page 1–51.
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 1–51.
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 1–51.
HPress CURSOR.
HPress the main-menu button Function; then press the side-menu
button V Bars.
HPress CLEAR 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 1–51.
HRead the measurement results at the D: cursor readout, not the @:
Figure 1–11: Measurement of channel delay – TDS 684C shown
g. Check against limits: CHECK that the cursor readout on screen is
≤100 ps for the TDS600C or ≤50 ps for the TDS 500D, TDS694C,
TDS700D, and TDS714L.
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.
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
and Delay Time
Equipment
required
PrerequisitesSee page 1–17
Time Mark or
Sine Wave
Generator
One time-mark generator (Item 11), or
Sine wave generator (Item 14)
One 50 W, precision coaxial cable (Item 5)
Oscilloscope
Output
50 W 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 output of the generator to CH 1 (see Figure 1–12).
HIf using a time-mark generator, set the output for 10 ms markers.
HIf using a sine wave generator, set the output for 1.2 V and 500 kHz.
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).
HSet the horizontal SCALE of the Main time base to 2 ms.
HPress VERTICAL MENU; then press the main-menu button
Coupling. Press the side-menu button W to toggle it to the 50 W
setting. (This step is not required on theTDS694C or TDS794D.)
HPress SET LEVEL TO 50%.
HUse the vertical POSITION knob to center the test signal on screen.
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:
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 on page 1–55.
b. Measure the test signal:
HSet the horizontal SCALE of the D (delayed) time base to 500 ns for
the TDS600C or to 100 ns for the TDS694C, TDS500D, TDS700D,
or TDS714L.
HIf using a time-mark generator, align the trigger T to the center
vertical graticule line by adjusting the horizontal POSITION. See
Figure 1–13 on page 1–55.
HIf using a sine wave generator, align the rising edge of the sine wave
on the center graticule crosshairs by adjusting the horizontal
POSITION.
HSet delayed time to 10.000016 ms. Do this on the keypad by
pressing 10.000016, 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 (or sine wave) crosses
the center horizontal graticule line at a point within either ±1.0
divisions for the TDS694C, ±2.0 divisions for the TDS600C,
±2.5 divisions for the TDS500D, TDS700D, or TDS714L, of center
graticule.
See Figure 1–13 on page 1–55.
One 50 W, precision coaxial cable (Item 5)
One Connector, BNC “T”, male BNC-to-dual female BNC (Item 7)
One Pulse Generator, W avetek 9500 or equivalent (Item 23)
Two 50 W, coaxial cable, male-to-male SMA connectors (Item 28)
One SMA female to BNC male connector (Item 30)
One BNC elbow connector (Item 31)
One SMA “T”, male to two SMA female connectors (Item 29)
Two SMA terminator connectors, short circuit, (Item 32)
One 2X attenuator, 50 W, female BNC-to- male BNC (Item 33)
PrerequisitesSee page 1–17
This procedures checks the “sample rate” portion of the Delta Time Measurement Accuracy as listed under Warranted Characteristics in Specifications. The
previous procedure, Check Accuracy for Long-Term Sample Rate and DelayTime, see page 1–53, verified the “PPM” portion of the delta time specification.
Oscilloscope
Output
BNC 90° female to
male adapter
50 W cable
Figure 1–14: Delta time accuracy test hookup
1. Install the test hookup and preset the instrument controls:
a. Initialize the oscilloscope:
HPress save/recall SETUP. Press the main-menu button Recall
SMA male
2X attenuator
BNC T
connector
BNC to SMA
adapter
20I 50 W cable
SMA T
connector
20I 50 W cable
to male
SMA male
to male
SMA short
SMA short
Factory Setup. Press the side-menu button OK Confirm Factory
Init.
b. Hook up the pulse generator (see Figure 1–14 on page 1–56):
HConnect the pulse generator output to a 50 W precision coaxial cable
followed by a 90°right-angle female to male BNC adapter, then
a 50 W 2X attenuator. The attenuator is connected to one side of the
female BNC T connector. The other side of the BNC T is connected
to BNC male to SMA adapter. The SMA side is connected to
male side of the SMA T connector. (Keep the distance between the
BNC T and SMA T as short as possible). Connect 20 inch 50 W
coaxial cables to each female side of the SMA T connector. Connect
a female to female SMA adapter to both male coaxial connectors.
Connect the SMA short, to the remaining female SMA adapter. Now
connect the male BNC T connector to CH 1.
HSet the pulse generator output for a positive-going pulse with a
rise–time as shown in Table 1–6 on page 1–58 for your oscilloscope,
and for the fastest possible rep rate (at least 1 kHz).
HSet the pulse generator output for about 500 mV. (This amplitude
can be adjusted later to get a 5–division pulse on screen.)
c. Modify the initialized front-panel control settings:
H(This substep is not required on the TDS694C or TDS794D.) Press
VERTICAL MENU. Press the main-menu button Coupling, then
press the side-menu W button to toggle it to the 50 W setting.
HPress AUTOSET. You may see both positive and negative pulses.
Adjust the trigger MAIN LEVEL knob so the trigger level is about
50% of the rising edge of the positive pulse.
H(TDS 500D/700D/714L only.) Press SHIFT; then press ACQUIRE
MENU. Press the main-menu button Repetitive Signal, then pressthe side-menu OFF (Real Time Only).
HSet the horizontal SCALE of the Main time base to 2 ns/division.
The pulse width should be about 6 ns.
HAdjust pulse amplitude and oscilloscope vertical scale and position
as necessary to obtain about 5 divisions of the positive pulse.
d. Set up for statistics measurements:
HRe-adjust the trigger MAIN LEVEL knob so the trigger level is
about 50% of the rising edge of the positive pulse.
HPress RUN/STOP button to freeze the display.
HPress MEASURE to bring up the Measure menu.
HPress MEASURE ➞Select Measurmnt for Ch1 (main menu)
➞Positive Width (side menu).
HPress Statistics ➞Statistics OFF (side menu) to reset the statistics,
then press ➞Statistics Mean/StdDev (side menu).
HPress Statistics Weights (side menu). On the keypad press 1000,
then ENTER.
HPress RUN/STOP button to start the acquisitions.
HWait about 30 seconds.
HPress RUN/STOP button to freeze the display.
HRecord the mean, m (value).
HPress Statistics Min/Max (side menu) to display those values.
HCalculate the difference of the Max minus the mean.
HCalculate the difference of the mean minus the Min.
HBoth differences must be less than or equal to the Delta-time
accuracy limit shown in Table 1–6 for your oscilloscope.
T able 1–6: Delta time measurement
Oscilloscope typePulse rise time rangeDelta time accuracy limit
One sine wave generator (Item 14)
Two precision 50W 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 600C or 25 ns on the TDS 500D/700D/714L.
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 600C or 25 ns on the TDS 500D/700D/714L; 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 W to select the 50 W setting.
(This step is not required on the TDS694C TDS794D.)
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 the generator 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
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 1–18 on page 1–65.
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.
HLeave the Main trigger system triggered on the positive slope of the
waveform before proceeding to the next check.
HPress the main-menu button Source; then press the side-menu button
–more– until CH 1 appears. Press CH 1.
4. Confirm that the Main and Delayed trigger systems are within sensitivity
limits (full bandwidth):
a. Hook up the test-signal source: Disconnect the hookup installed in
step 1. Connect the signal output of a high-frequency sine wave
generator to CH 1. Some TDS models need a high frequency
(>500 MHz) generator; see footnotes 1 and 5 in Table 1–1 on page 1–18.
b. Set the Main and Delayed Horizontal Scales:
HSet the horizontal SCALE to 500 ps for the M (Main) time base.
HPress HORIZONTAL MENU. Now press the main-menu button
Time base; then press the side-menu button Delayed Triggerable.
HPress the side-menu button Delayed Only.
HSet the horizontal SCALE to 500 ps for the D (Delayed) time base.
Press the side-menu button Main Only.
c. Display the test signal:
HSet the generator frequency to full bandwidth as follows:
HSet the test signal amplitude for about five divisions on screen. Now
fine adjust the generator output until the CH 1 Amplitude readout
indicates the amplitude is 500 mV. (Readout may fluctuate around
500 mV). TDS694C only: Press the set level to 50% and check that
a stable trigger is obtained.
HDisconnect the leveling head at CH 1 and reconnect it to CH 1
through a 5X attenuator. Check that a stable trigger is obtained.
d. Repeat step 2, substeps b and c only, for the full bandwidth selected.
TDS694C or TDS794D exception: Perform step 2, substep c (Delayed
trigger) with the generator frequency set to 1.5 GHz.
NOTE. You just checked the trigger sensitivity. If desired, you may repeat steps 1
through 4 for the other channels (CH2, CH3, and CH4).
5. Disconnect the hookup: Disconnect the cable from the channel last tested.
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
(AUX 1 on some models)
Main and Delayed Trigger
Equipment
required
PrerequisitesSee page 1–17. Also, the oscilloscope must have passed Check DC
Two precision 50 W coaxial cables (Item 5)
One calibration generator (Item 10)
Voltage Measurement Accuracy on page 1–38.
See Input Channels versus Model on page 1–2.
1. Install the test hookup and preset the instrument controls:
Calibration
Generator
To MAIN
TRIGGER
OUT
Oscilloscope
50 W coaxial cables
Figure 1–19: Initial test hookup
1–68
a. Hook up test-signal source 1 (See Figure 1–19):
HConnect the standard amplitude output of a calibration generator
through a 50 W precision coaxial cable to CH 3 (AUX1 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
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:
HPress WAVEFORM OFF to turn off CH 1.
HPress CH 3 (AUX 1 on some TDS models) to display that channel.
HTDS694C only: Press trigger menu, select Ch 3 as trigger, set to
50%.
HIf necessary, adjust the calibration generator output for 5 divisions of
amplitude. (With the 50W input of the TDS694C and TDS794D, you
may need to double the output of the generator to get 5 divisions of
amplitude.)
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 3.
HPress CH 2 to display that channel.
HSet the vertical SCALE to 1 V, 500 mV for TDS694C or TDS794D.
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.
HCHECK that the readout Ch2 Pk-Pk is between 40 mV and 60 mV,
inclusive, for the TDS 600C or is between 44 mV and 66 mV,
inclusive, for the TDS 500D/700D/714L.
HEnter voltage on test record.
4. Disconnect the hookup: Disconnect the cables from the channel inputs and
the rear panel outputs.
Check Probe
Compensator Output
Equipment
required
PrerequisitesSee page 1–17. Also, the oscilloscope must have passed Check
One female BNC to clip adapter (Item 3)
Two dual-banana connectors (Item 6)
One BNC T connector (Item 7)
Two precision 50 W coaxial cables (Item 5)
One DC calibration generator (Item 9)
Accuracy For Long-Term Sample Rate, Delay Time, and Delta Time
Measurement on page 1–56.
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 1–21.
HConnect the other end of the cable just installed to the female
BNC-to-clips adapter. See Figure 1–21.
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 1–21.
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 ms.
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.
HSet the output of a DC calibration generator to off or 0 volts.
HConnect the output of a DC calibration generator through a
HConnect the Sense output of the generator through a second
Dual banana to
BNC adapters
Performance Tests
dual-banana connector followed by a 50 W precision coaxial cable to
one side of a BNC T connector. See Figure 1–23.
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 1–23.
Oscilloscope
DC Calibrator
50 W coaxial cables
Figure 1–23: Subsequent test hookup
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.
BNC T
connector
f.Press CLEAR MENU to remove the menus from the display. See
Option 05 Video Trigger Checks
(Not Available on TDS694C or TDS794D)
Performance Tests
Check Video Trigger
Equipment
required
PrerequisitesSee page 1–17. These prerequisites include running the signal path
PAL signal source (Item 21)
60 Hz sine wave generator (Item 22)
Pulse generator (Item 23)
Two 75 W cables (Item 24)
Two 75 W terminators (Item 25)
One BNC T connector (Item 7)
One precision 50 W coaxial cable (Item 5)
50 W terminator (Item 4)
compensation routine.
1. Set up the 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 oscilloscope is setup as shown below.
2. Set up the 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.Press HORIZONTAL MENU.
k. Press the main-menu Horiz Scale.
l.Use the keypad to set the horizontal scale to 200 ns (press 200, SHIFT,
n, then ENTER).
m. Use the Vertical Position knob to center the waveform on screen.
3. Check Jitter vs. Signal Amplitude
a. Set up equipment for Jitter Test. See Figure 1–25.
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 oscilloscope.
HPress the 100% FIELD control (the fourth TSG121 front-panel
button from the left) of the PAL signal source.
PAL Signal
Source
COMPST
75 W cable
Oscilloscope
75 W terminator
Figure 1–25: 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 1–26.
Figure 1–26: Jitter test displayed waveform – TDS 754D shown
c. Press SHIFT; then press ACQUIRE MENU.
d. Press the main-menu Mode.
e. Press the side-menu Envelope.
f.Use the keypad to set envelope to use 100 acquisitions (press 100, then
ENTER).
g. Press the main-menu Stop After button.
h. Press the side-menu Single Acquisition Sequence.
i.Wait for the word Run in the top left corner of the display to change to
STOP.
4. Perform Check Trigger Jitter.
Set up Oscilloscope for the Trigger Jitter Test.
a. Press DISPLAY.
b. Press the main-menu Format/RO.
c. Press the side-menu Display ‘T’ @ Trigger Point until you select OFF.
d. Press CURSOR.
c. Press HORIZONTAL MENU.
d. Use the keypad to set horizontal scale (/div) to 50 ms (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).
Positive pulse
Negative pulses
m. CONFIRM that the TRIG’D LED stays lighted and that the waveform
on screen is stable. Also, CONFIRM that the waveform on the screen
has one positive pulse and a number of negative pulses. See Figure 1–28.
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 1–29.
Positive pulse
Negative pulses
Figure 1–29: Triggered signal range test – 75 mV
p. Disconnect all test equipment (TSG121) from the oscilloscope.
6. 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.
1–82
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 50 ms (press 50,
SHIFT, m, then ENTER).
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 1–32.
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 1–32.
PAL signal
source
Signal Generator
COMPST
Output
COMPST
Figure 1–32: 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 1–33.
Oscilloscope
75 W terminators
75 W Cable
BNC T connector
50 W cable
75 W cable
1–84
HDisconnect all test equipment from the oscilloscope.
Figure 1–33: 60 Hz Rejection test result – TDS 684C shown
7. 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 1–34.