Tektronix TLA7AA4,TLA7AC4,TLA7AC3,TLA7AC2 Service
xx
TLA7ACx
ZZZ
Tektronix Logic Analyzer Module
Service Manual
This document applies to TLA application software version 5.6
and above.
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to performing service.
www.tektronix.com
P077015801*
*
077-0158-01
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O . B ox 50 0
Beaverto
USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200.
World wide , vis i t www.tektronix.com to find contacts in your area.
Warranty
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its
option, either will repair the defective product w ithout charge for parts and labor, or will provide a replacement
in exchange for the defective product. Parts , modules and replacement products used by Tektronix for warranty
work may be n
the property of Tektronix.
ew or reconditioned to like new performance. All replaced parts, modules and products become
In order to o
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 s ervice center designated by Tektronix, with shipping
charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within
the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping
charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
result
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage
or malfunction caused by the use of non-Tektronix supplies; or d) 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 THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE
TEK
AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
[W2 – 15AUG04]
btain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
ing from attempts by personnel other than Tektronix representatives to install, repair or service the product;
Table of Contents
General safety summary .............. ................................ ................................ ............ iv
Service safety summary........................................................................................... vi
Preface ............................................................................................................. vii
Related Documentation ..................................................................................... vii
Manual Conventions............................................ ................................ ............. viii
Introduction ........................................................................................................ ix
Strategy for Servicing .... ................................ ................................ .................... ix
Service Offerings ............................................................................................. ix
Performance Verification Procedures............................................................................. 1
Test Equipment................................................................................................. 1
Threshold Accuracy Test............................. .................................. ....................... 1
Setup and Hold.......... ................................ .................................. ..................... 5
Test Fixtures.................................................................................................... 9
Threshold Accuracy Test Fixture ............................................................................ 9
Setup and Hold Test Fixture............. ................................ ................................ .... 10
Calibration data report ............................................................................................ 12
Test record ..................................................................................................... 12
Test data.................................... ................................ ................................ .... 12
Maintenance........................................................................................................ 13
Related Maintenance Procedures ........................................................................... 13
Preventing Electrostatic Discharge ......................................................................... 13
Inspection and Cleaning............ .................................. ................................ ........ 14
Cleaning the P6864, P6880, P6960, and P6980 Compression Footprints .............................. 18
Cleaning the P6864, and P6880 Probe Heads ..... ................................ ........................ 18
Cleaning the P6900 Probe Heads ... .................................. ................................ ...... 19
Storing the P6800 Probe Heads ................... .................................. ........................ 20
Storing the P6900 Probe Heads ................... .................................. ........................ 21
Removal and Installation Procedures.................................. .................................. ........ 23
Tools Required ................................................................................................ 23
Torque Requirements......................................................................................... 23
Injector/Ejector Handles ................. ................................ .................................. .. 24
Covers................ ................................ ................................ .......................... 25
Local Processor Unit Board ................................................................................. 30
Acquisition Board . .. ... .. . .. ... .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . 33
Front and Rear EMI Gaskets ................................................................................ 37
Side EMI Gaskets................. .................................. ................................ .......... 38
Troubleshooting.................................................................................................... 39
Service Level.... ................................ ................................ .............................. 39
Required Documentation .................................................................................... 40
TLA7ACx Logic Analyzer Module Service Manual i
Table of Contents
Check for Commo
Eliminate Other Problem Sources........................................................................... 41
Troubleshoot the Logic Analyzer Module ................................................................. 43
Adjustment After Repair... .................................. ................................ ................ 49
Updating or Restoring the Logic Analyzer Firmware .................................................... 49
Repackaging Instructions ......................................................................................... 51
Packaging...................................................................................................... 5
Shipping to the Service Center .............. .................................. .............................. 51
Storage..... ................................ ................................ .................................. .. 52
Parts List............................................................................................................ 53
Parts Ordering Information .. ................................ .................................. .............. 53
Using the Replaceable Parts List............................................................................ 54
n Problems ............................... .................................. .............. 40
1
ii TLA7ACx Logic Analyzer Module Service Manual
List of Figures
Figure 1: Setting trigger parameters. .. . .. . .. .. . .. . .. .. . .. .. . .. ... .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. . 3
Figure 2: Set the trigger states .................................................................................... 7
Figure 3: Threshold Accuracy test fixture ....................................................................... 9
Figure 4: Solder square pins to the SMA connector........................................................... 10
Figure 5: Solder the SMA connectors together ............ ................................ .................... 11
Figure 6: Completed fixture with termination and coupler ................................................... 11
Figure 7: Cleaning the probe heads ..................... .................................. ...................... 19
Figure 8: Cleaning the P6900 probe heads ....... ................................ .............................. 20
Figure 9: Storing the probe head................................................................................. 20
Figure 10: Storing the P6900 probe heads...................................................................... 21
Figure 11: Injector/ejector handle replacement ................................................................ 24
Figure 12: Cover removal ........................................................................................ 26
Figure 13: Removing the merge cable bracket from the cover ............................. .................. 27
Figure 14: Installing the cover onto the chassis. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. . 28
Figure 15: Seating the cover on the chassis .................................................................... 30
Figure 16: LPU board removal .. .................................. ................................ .............. 31
Figure 17: Inserting LPU board tabs into front subpanel ..................................................... 32
Figure 18: Remove the single screw from the merge cable bracket ......................................... 33
Figure 19: Removing the merge cable assembly............................... ................................ 34
Figure 20: Removing the acquisition board from the chassis . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . 35
Figure 21: Rear EMI gasket removal............ ................................ ................................ 37
Figure 22: Rear EMI gasket replacement....................................................................... 38
Figure 23: Primary troubleshooting chart....................................................................... 46
Figure 24: Logic analyzer module exploded view......................................... .................... 55
List of Tables
Table 1: External inspection check list.......................................................................... 15
Table 2: Internal inspection checklist ........... .................................. .............................. 16
ble 3: Tools required for circuit board replacement......................................................... 23
Ta
Table 4: Failure symptoms and possible causes.................................. .............................. 40
Table 5: Diagnostic tests.......................................................................................... 47
Table 6: Requirements after replacement ............................... .................................. ...... 49
TLA7ACx Logic Analyzer Module Service Manual iii
General safety summary
General safet
To avoid fire or personal
injury
ysummary
Review the fo
this product or any products connected to it.
To avoid pot
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of a larger system.
Read the safety sections of the other component manuals for warnings and
cautions r
Ground the product. This product is indirectly grounded through the grounding
conductor of the mainframe power cord. To avoid e lectric shock, the grounding
conductor must be c onnected to earth ground. Before making connections to
the input or output terminals of the product, ensure that the product is properly
ground
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and ma
information before making connections to the product.
The i
ed.
nputs are not rated for connection to mains or Category II, III, or IV circuits.
llowing safety precautions to avoid injury and prevent damage to
ential hazards, use this product only as specified.
elated to operating the system.
rkings on the p roduct. Consult the product manual for further ratings
Do not apply a potential to any terminal, including the common terminal, that
eeds the maximum ratingofthatterminal.
exc
Power disconnect. The power cord disconnects the product from the power source.
ot block the power cord; it must remain accessible to the user at all times.
Do n
Do not operate without covers. Do not operate this product with covers or panels
moved.
re
Do not operate with suspected failures. If you suspect that there is damage to this
roduct, have it inspected by qualified service personnel.
p
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide proper ventilation. Refer to the manual's installation instructions for details
on installing the product s o it has proper ventilation.
iv TLA7ACx Logic Analyzer Module Service Manual
General safety summary
Terms in this manual
Symbols and terms on the
product
These terms may
WAR N ING. 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.
These terms may a ppear on the product:
DANGER in
the marking.
WAR N IN G
read the marking.
CAUTIO
The following symbol(s) may appear on the product:
appear in this manual:
dicates an injury hazard immediately accessible as you read
indicates an injury h azard not immediately accessible as you
N indicates a hazard to property including the product.
TLA7ACx Logic Analyzer Module Service Manual v
Service safety summary
Service safet
ysummary
Only qualifie
safety summary and the General safety summary before performing any service
procedures.
Do not service alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use care when servicing with power on. Dangerous voltages or currents may exist
in this p
test leads before removing protective panels, soldering, or replacing components.
To avoi
d personnel should perform service procedures. Read this Service
roduct. Disconnect power, remove battery (if applicable), and disconnect
d electric shock, do not touch exposed connections.
vi TLA7ACx Logic Analyzer Module Service Manual
Preface
This is the service manual for the TLA7ACx Series Logic Analyzer Module. Read
this preface to learn how this manual is structured, what conventions it uses, and
where you can
Introduction, which follows this preface, for important background information
needed before using this manual for servicing this product.
Related Documentation
The following manuals are available as part of the TLA Series Logic Analyzer
documentation set.
Related Documentation
Item Purpose Location
TLA Quick Start User Manuals
High-level operational overview
find other information related to servicing this product. Read the
Online Help
Installation Quick Reference Cards High-level installation information
Installation Manuals
of Logic A nalyzers
XYZs
Declassification and Securities
instructions
Application notes
Product Specifications & Performance
Verification Procedures
I.NET Documentation
TP
Field upgrade kits
In-depth operation and UI help
Detailed first-time installation inform ation
Logic analyzer basics
Data security concerns specificto
sanitizing or removing memory devices
from Tektronix products
lection of logic analyzer application
Col
specific notes
TLA Product specifications and
performance verification procedures
Detailed information for controlling the
logic analyzer using .NET
Upgrade information for your logic
analyzer
Optional Service Manuals Self-service documentation for modules
nd mainframes
a
TLA7ACx Logic Analyzer Module Service Manual vii
Preface
Manual Conven
Acquisition
tions
Board
LPU Board
Maintenance Procedures
Modul
This manual uses certain conventions that you should be familiar with before
attempting service.
The acquisition board is one of the circuit boards inside the logic analyzer module.
The circuit board receives and stores acquisition data from the probes and works
with the local process or unit (LPU) board to provide logic analysis information
to the o per
The LPU board is one of the circuit boards inside the logic analyzer module that
provides the main communications interface with the acquisition board and the
mainfra
Maintenance procedures are used for fault isolation and repair to the circuit board
level or to the replaceable part level.
Throughout this manual, the term "module" refers to a logic analyzer or digital
es
oscilloscope, or pattern generator unit that mounts inside a mainframe. A module
is composed of circuit boards, interconnecting cables, and a user-accessible front
pane
ator of the logic analyzer.
me.
l.
Performance Verification
Procedures
laceable Parts
Rep
Performance verification procedures confirm that a product meets or exceeds the
performance requirements for each of the published specifications.
This manual refers to a ny field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replaceable part is any circuit board or assembly that is listed in the replaceable
arts list near the end of this manual.
p
viii TLA7ACx Logic Analyzer Module Service Manual
Introduction
Strategy for Servicing
This manual contains information needed to properly service the logic analyzer
module, as well as general information c ritical to safe servicing.
To prevent personal injury or damage consider the following requirements before
attempting service:
The procedures in this manual should be performed only by qualified service
personnel.
Read the General Safety Summary and Service Safety S ummary located at
the beginning of this manual.
When using this manual for servicing follow all warnings and cautions.
This manual contains information for correc tive maintenance of this product:
Supports isolation of faults to the failed circuit board or assembly level shown
in the replaceable parts list
Supports removal a nd replacement of those boards or assemblies
Service Offerings
rts r emoval and replacement of mechanical parts listed in the
Suppo
replaceable parts list
manual does not support component-level fault isolation and replacement.
This
tronix provides service to cover repair under warranty as well as other services
Tek
that are designed to meet your specific service needs.
ether providing warranty repair service or any of the other services listed
Wh
below, Tektronix service technicians are well equipped to service the logic
analyzer module.
TLA7ACx Logic Analyzer Module Service Manual ix
Introduction
Warranty Repair Service
Calibration and Repair
Service
Service Options
Service Agreements
Tektro ni x w a rr
appears behind the title page in this manual.) Tektronix technicians provide
warranty service at most Tektronix service locations worldwide. The Tektronix
product catalog lists all service locations worldwide or you can visit us on our
web site at http://www.tektronix.com/Measurement/Service. See our latest service
offerings and contact us by email.
In addition to warranty repair, Tektronix Service offers calibration and other
services that provide cost-effective solutions to your service needs and qualitystandards compliance requirements. Our instruments are supported worldwide
by the leading-edge design, manufacturing, and service resources of Tektronix to
provide the best possible service.
The following services can be tailored to fit your requirements for calibration
and/or repair of the logic analyzer mod
Tektronix Service Options can be selected at the time you purchase your
instrument. You select these options to provide the services that best meet your
service needs.
If service options are not added to the instrument purchase, then service
agreements are available on an annual basis to provide calibration services or
post-warranty repair coverage for the logic analyzer module. Service agreements
may be customized to meet special turn-around time and/or on-site requirements.
ants this product for one year from date of purchase. (The warranty
ule.
Service On Demand
Self Service
For More Information
Tektronix also offers calibration and repair services on a "per-incident" basis that
is available with standard prices for many products.
Tektronix supports repair to the replaceable-part level by providing for circuit
board exchange. Use this service to reduce down-time for repair by exchanging
circuit boards for remanufactured ones. Tektronix ships updated and tested
exchange boards. Each board comes with a 90-day service warranty.
When you exchange circuit boards, you must supply the following information to
allow the board to be preconfigured to the proper PowerFlex level. You can also
return the repaired module to your local service center for config
Model number and serial number
PowerFlex option upgrade number
Firmware level
Contact your local Tektronix service center or sales engineer for more information
on any of the Calibration and Repair Services just described.
uration.
x TLA7ACx Logic Analyzer Module Service Manual
Performance Verification Procedures
This section contains procedure for performance verification of the logic analyzer.
Generally, you should perform these procedures once per year or following repairs
that affect c
Test Equipment
ertification.
The proced
ures in this section use external, traceable signal sources to test key
specifications listed in the TLA Product Specifications & Performance Verification
Technical Reference Manual located on the TLA documentation CD or on the
Tektronix Web Site.
Test equipment or test
fixture Minimum requirements Example
Precision voltage reference
or a DC signal generator and
precision digital voltmeter
Logic analyzer probe
Data Timing Generator Tektronix DTG 524 with a
Test fixture, Threshold
Accuracy
Precision BNC cable One required
Test fixture, Setup and Hold Minimum of two test fixtures
performance verification procedures check the following specifications:
The
(accurate to within ±5mV)
One required
DTGM30 Output Module
One required Refer to Threshold Accuracy
required
P6810
Test Fixture. (See page 9.)
Refer to Setup and Hold
Test Fixture. (See page 10.)
Threshold Accuracy
Setup/Hold Window Size
hreshold Accuracy Test
T
This procedure verifies the threshold voltage accuracy of the logic analyzer.
Equipment required
Prerequisites Warm-up time: 30 minutes
Precision voltage reference or a DC signal
generator and precision digital voltmeter
(accurate to within ±5mV)
Threshold Accuracy test fixture
P6810 Logic analyzer probe
TLA7ACx Logic Analyzer Module Service Manual 1
Performance Verification Procedures
Test Equipment Setup
TLA7000 Setup
Connect a P6810
Threshold Accuracy test fixture. If the voltage source does not have the required
output a ccuracy, use a multimeter with the required accuracy to verify the voltage
output levels specified in the procedure.
To set up the logic analyzer for this test, you must define the characteristics of the
channel that you are testing, and then set the trigger parameters:
1. Open the Setup window.
a. In the Grou
(“Test” in the example).
b. Define the
c. Set the sampling to Asynchronous, 2.0 ns.
d. Set the Acquisition Length to 128K or less.
e. Set Acquire to Samples.
2. Go to the Trigger window and select the Power Trigger tab. Create a trigger
program that triggers the logic analyzer when it doesn't see all highs or all
lows:
probe from the logic analyzer to the voltage source, using the
p column, enter a name for the probe group that you are testing
signals for the group that you are testing.
a. Click the If Then button.
b. Set the channel definition to match the figure shown. (See Figure 1.)
c. After you set the channel definitions, click OK.
2 TLA7ACx Logic Analyzer Module Service Manual
Performance Verification Procedures
Figure 1: Setting trigger parameters
TLA7ACx Logic Analyzer Module Service Manual 3
Performance Verification Procedures
Verification Procedure
Complete the fo
copy of the Calibration data sheet. (See page 12, Calibration data report.)
1. Go to the Setup
voltages to 4 V.
2. Set the volt
3. Start the logic analyzer and verify that it does not trigger.
4. Increase the voltage in 10 mV steps, waiting at least 3 seconds between steps
to make sure that the logic analyzer continues to run without triggering.
Continue u
5. Set the voltage source to 4.150 V.
6. Start the logic analyzer and verify that it does not trigger.
7. Decrease the voltage in 10 mV steps, waiting at least 3 seconds between
steps to make sure that the logic analyzer continues to run without triggering.
Continue until the logic analyzer triggers and then record the voltage.
8. Add the two voltage values and divide by two. Verify that the result is
4.00 V ±75 mV. Record the voltage on the Calibration data sheet.
9. Go to the Setup window and set the logic analyzer threshold voltages to –2.0 V.
llowing steps to complete this procedure. Record the results on a
window of the logic analyzer and set the probe threshold
agesourceto3.850V.
ntil the logic analyzer triggers and then record the voltage.
10. Repeatsteps3through8for–2.130Vand–1.870V.
11. Add the two voltage values and divide by two. Verify that the result is
–2.00 V ±55 mV. Record the voltage on the Calibration data sheet.
12. Repeat the procedure for each probe channel group that you want to verify.
4 TLA7ACx Logic Analyzer Module Service Manual
Setup and Hold
Performance Verification Procedures
This procedure verifies the setup and hold specifications of the logic analyzer.
Digital Timing Generator
Setup
Equipment re
Prerequisi
1. Verify tha
quired
tes
Tektronix DTG 524 Data Timing Generator
with a DTGM30 Output Module
Precision B
Setup and Hold test fixture
Warm-up tim
NC cable
e: 30 minutes
t the digital timing generator (DTG) has been calibrated so that the
channel-to-channel skew is minimized.
2. Set up the
DTG so that a channel (CH1 for example), is set to be a clock
pattern of alternating 1 and 0 (101010… binary) starting with 1 (rising edge).
3. Set the output frequency to 250 MHz. (This may require you to set the D TG
base clock to 500 MHz for this pattern to represent 250 MHz at the channel
output.)
4. Set another channel of the DTG (CH2 for example) to a data pattern
representing half the period of CH1 (for example 001100110011...binary,
ing with 00).
start
5. Connect the setup and hold test fixtures to the DTG channels that you have set
onnect 50 Ω SMA terminations to the test fixtures.
up. C
6. Connect the DTG channel that you set up a s a clock to the appropriate TLA
x] input.
CK[
7. Connect the other DTG channel to two of the TLA data channels that you
nt to test.
wa
If you want to test other TLA data channels simultaneously and your DTG
as additional outputs available, set up those DTG channels like the first data
h
channel, and connect them to the other logic analyzer channels that you want
to test. (The channels must be in the same probe, and you will need another
test fixture for each additional channel pair.) Otherwise, repeat the procedure
for each new pair of logic analyzer channels.
8. SettheterminationtoopenoneachDTGchannel.
9. Set the DTG output voltage levels to 2.0 V High and 0.0 V Low, with no offset.
TLA7ACx Logic Analyzer Module Service Manual 5
Performance Verification Procedures
TLA7000 Setup
1. Start the TLA Ap
2. Click the DM button to default the module.
3. Click on the Synchronous tab and set the following parameters:
a. Clock Signal: Choose the clock that you connected the DTG output to.
b. Max Clock Ra
c. Global Threshold: Set to 500 mV.
With the 50 Ω external termination attached at the SMA fixture end, this
sets the logic analyzer threshold voltage levels to one-half the resulting
terminat
4. In the Acquisition Options box, select the following:
a. Acquisition Length: 1K or greater
b. Storage Options: Normal
5. Create a new group: right click in the Group Name column.
6. Select Add Group from the pop-up window. Rename the new group Test.
7. In the
Probe Channels column, enter the names of the two adjacent data
channels that will be used to connect to CH2 of the DTG.
plication and open the Setup Window.
te: 450 MHz
ion voltage, which should be about 500 mV (not 1 V).
NOTE. These procedures test two channels. If you want to check more than two
channels, be sure to set the group and trigger word widths to the same amount.
6 TLA7ACx Logic Analyzer Module Service Manual
Performance Verification Procedures
Trigger Logic.
whenever the two data lines are neither 00 nor 11 (binary). This will capture
the condition when the two data signals are 01 or 10, as they transition to their
common values. To set this up, do the following:
8. Open the LA Trigger window and select the Power Trigger tab. Set up three
states as shown. (See Figure 2.)
To complete the setup, you must configure a trigger to occur
Figure 2: Set the trigger states
TLA7ACx Logic Analyzer Module Service Manual 7
Performance Verification Procedures
Verification Procedure
Complete the fo
copy of the Calibration data sheet. (See page 12, Calibration data report.)
1. Set the DTG seq
2. Press the RUN button on the TLA and wait a few seconds to verify that
it doesn't t
3. Starting from 0.000 ns, increase the delay of the DTG clock channel in 100 ps
steps until
decrease the delay in 10 ps steps to find the trigger threshold to within 10 ps.
Record this delay amount.
Note that the logic analyzer might trigger because of a glitch when you make
a delay change. If the data in the waveform window is correct (all data
transitioning at the same time and at the correct frequency), then ignore this
"false trigger" and start the logic analyzer again.
As an alternative, you may want to run the logic analyzer in continuous loop
mode if the DTG causes a false trigger on the logic analyzer each time you
change the delay. Then observe if the data is correct in the waveform window
and ig
waveform window displays data that was not acquired correctly. Record this
delay.
4. Add0.75nstothedelayvaluethatyourecordedinstep3andincreasethe
DTG clock delay to match this cumulative value. (For example, if you
measured 0.85 ns, increase the delay to 1.60 ns.)
llowing steps to complete this procedure. Record the results on a
uencer to RUN and the outputs ON.
rigger.
triggering begins to occur. When the TLA begins to trigger,
nore any false triggers. Continue increasing the clock delay until the
5. Press Run and wait a few seconds to verify that it doesn't trigger. This verifies
thatthesetupandholdwindowislessthan0.75ns,whichistheguaranteed
specification for a single channel.
If you want to measure the actual setup and hold window size for your
application, slowly decrease the clock delay in steps (waiting a few seconds
between steps to verify that it doesn't trigger), until the logic analyzer triggers.
ecord this second value. The difference between this second value and the
R
value that you measured in step 3 is the measured setup and hold window size.
Record the results in the Calibration data report.
8 TLA7ACx Logic Analyzer Module Service Manual
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