Teledyne TF-DSQ User Manual
Operator’s
Manual
TF-DSQ Probe Calibration
and Deskew Fixture
TF-DSQ Probe Calibration and
Deskew Fixture
Operator's Manual
July, 2009
Manufactured under an ISO
9000 Registered Quality
Management System.
Visit www.lecroy.com to view
the certificate.
This electronic product is subject to disposal and recycling
regulations that vary by country and region. Many countries
prohibit the disposal of waste electronic equipment in standard
waste receptacles.
For more information about proper disposal and recycling of your
LeCroy product, please visit www.lecroy.com/recycle.
LeCroy Corporation
700 Chestnut Ridge Road
Chestnut Ridge, NY, 10977-6499
Tel: (845) 578-6020, Fax: (845) 578 5985
Warranty
LeCroy warrants this oscilloscope accessory for normal use and operation within specification for a period of one year
from the date of shipment. Spare parts, replacement parts and repairs are warranted for 90 days.
In exercising its warranty, LeCroy, at its option, will either repair or replace any assembly returned within its warranty
period to the Customer Service Department or an authorized service center. However, this will be done only if the
product is determined by LeCroy’s examination to be defective due to workmanship or materials, and the defect is not
caused by misuse, neglect, accident, abnormal conditions of operation, or damage resulting from attempted repair or
modifications by a non-authorized service facility.
The customer will be responsible for the transportation and insurance charges for the return of products to the service
facility. LeCroy will return all products under warranty with transportation charges prepaid.
This warranty replaces all other warranties, expressed or implied, including but not limited to any implied warranty of
merchantability, fitness or adequacy for any particular purposes or use. LeCroy shall not be liable for any special,
incidental, or consequential damages, whether in contract or otherwise.
Internet: www.lecroy.com
© 2009 by LeCroy Corporation. All rights reserved.
LeCroy, ActiveDSO, JitterTrack, WavePro, WaveMaster, WaveSurfer, WaveLink, WaveExpert, Waverunner, and WaveAce
are registered trademarks of LeCroy Corporation. Other product or brand names are trademarks or requested trademarks
of their respective holders. Information in this publication supersedes all earlier versions. Specifications are subject to
change without notice.
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TABLE OF CONTENTS
TF-DSQ Overview .................................................................................... 6
Probe Calibration with the TF-DSQ Fixture .............................................. 6
Probe Calibration Steps with the TF-DSQ Fixture .................................... 7
TF-DSQ Connections ................................................................................ 8
TF-DSQ Fixture Overview ......................................................................... 8
TF-DSQ Fixture Elements ......................................................................... 9
Assembling the TF-DSQ fixture .............................................................. 10
TF-DSQ Oscilloscope Connection ........................................................... 11
Probe Connection to TF-DSQ ................................................................. 12
Probe Calibration .................................................................................. 14
Probe Calibration Menu......................................................................... 14
Accessing the Probe Calibration Menu .................................................. 14
Probe Calibration Menu Description ..................................................... 14
Basic Probe Calibration .......................................................................... 17
Advanced Mode Probe Calibration Menu ............................................. 17
Gain/Offset Only Calibration ................................................................. 17
Deskew Only .......................................................................................... 18
The Advanced Menu .............................................................................. 18
Rise Time Skew Correction .................................................................... 18
Deskew All (or Common Skew) .............................................................. 18
Common Mode Voltage Selection ......................................................... 19
Advanced Probe Calibration .................................................................. 19
Theory of Operation .............................................................................. 19
Deskew Theory of Operation ................................................................. 19
Deskew Risetime Adjustment Theory .................................................... 22
DC Calibration Theory ............................................................................ 24
Probing Basics ....................................................................................... 25
Single-Ended and Differential Probe Basics ........................................... 25
Operating Environment ......................................................................... 28
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Safety Precautions ................................................................................ 28
CERTIFICATIONS .................................................................................... 28
CE Declaration of Conformity ................................................................ 28
EMC Directive ........................................................................................ 28
Electromagnetic Emissions: ................................................................... 29
Electromagnetic Immunity: ................................................................... 29
Low-Voltage Directive ............................................................................ 29
Index .................................................................................................... 30
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TF-DSQ-OM-E RevC
WavePro 7 Zi and
WaveMaster 8 Zi
Oscilloscopes and SDA/DDA
7 and 8 Zi Models
WavePro 7000
Oscilloscopes
WaveMaster 8000
Oscilloscopes and SDA/DDA
Models, also DDA 5005A,
5005A XXL
Oscilloscope
Connection
ProLink and ProBus
ProBus Only
ProLink Only
Probes
Supported
D610,D620, D600A-AT, D310, D320, and D300A-AT with all probing accessories
AP020, AP033, AP034 HFP1000, 1500, 2500, and 3500, PP005 and PP005A
DC Range
±5 V single-ended, ±10 V differential
DC Accuracy
±(1% + 600 μV)
Edge Risetime
(of Device)
75 ps (typical) < 95 ps (guaranteed)
Edge Amplitude
and Rep Rate
Approximately 800 mV @ 10 MHz
Deskew
Accuracy
±20 ps (typical)
TF-DSQ Overview
Probe Calibration with the TF-DSQ Fixture
The TF-DSQ fixture is used in conjunction with the oscilloscope software to perform probe
deskew and DC calibration. It has the following leading features and specifications:
Deskew to +/- 20 ps typical accuracy
Differential and single-ended drive
75 ps edge
Calibration of DC gain and offset and skew at same probing point
Accounts for risetime variations
Accounts for common-mode voltage
DC gain calibration accounts for probe loading effects
Integrated operation with oscilloscope for fully automatic calibration
TF-DSQ Probe Calibration and Deskew Fixture
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Probe Calibration Steps with the TF-DSQ Fixture
Probe calibration is accomplished with the TF-DSQ fixture by following the steps in the following
flowchart.
Note: It is recommended that you read the instructions presented here in their entirety to
familiarize yourself with the advanced features of the TF-DSQ fixture prior to use.
The combination of TF-DSQ fixture and oscilloscope software is designed with an important use
model. Connecting probes to the circuit under test can be a difficult procedure. LeCroy's system,
therefore, is designed in a manner that allows you to set up the probe calibration fixture,
calibrate each individual probe once, connect your probes to the circuit, and disconnects the
fixture. Once your probes are in the circuit, there is no need to revisit the fixture until the next
calibration interval.
Familiarize yourself with the following topics:
TF-DSQ fixture overview
TF-DSQ Oscilloscope Connection
Probe Calibration Menu access
Probe connection to fixture
Calibrating probes
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TF-DSQ Connections
TF-DSQ Fixture Overview
The TF-DSQ fixture comes in a soft case containing a CD with .pdf versions of the manuals for
several oscilloscope options, along with the following components:
The TF-DSQ fixture
A 50-ohm SMA cable
ProBus extender complete with BNC to SMA adapter (TF-DSQ-PBE)
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A ProLink extender
A BNC to SMA adapter (not pictured)
TF-DSQ Fixture Elements
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Assembling the TF-DSQ fixture
See the fixture overview to identify individual components.
System assembly is accomplished in the following steps:
1. Connect one end of the 50 Ω cable to the desired ProLink or ProBus extender (with
adapter).
2. Connect the other end of the 50 Ω cable to the SMA connector on the TF-DSQ fixture.
3. Connect the ProLink or ProBus CAT 5 cable from the extender to the TF-DSQ fixture.
Note: The 50 Ω connection should be torque tightened with an RF torque wrench and must be
properly tightened.
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