Instruction Manual
LeCroy AP033
Active Differential Probe
DECEMBER, 2010
Warranty
LeCroy warrants this oscilloscope accessory for normal use and operation within
specifications for a period of
one
year from the date of shipment. Calibration after
a yearly
interval is recommended to ensure performance to specification. Spare parts,
replacement parts and repairs are warranted for
30
days. The instrument’s firmware has
been thoroughly tested and thought to be functional, but is supplied without warranty of any
kind covering detailed performance.
In exercising its warranty, LeCroy will repair or at its option, 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 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.
Corporate Headquarters
700 Chestnut Ridge Road
Chestnut Ridge, NY 10977-6499
Tel: (845) 578-6020, Fax: (845) 578-5985
Internet:
www.lecroy.com
Copyright 2010 by LeCroy Corporation. All rights reserved. Contents of this publication may
not be reproduced in any form without written permission of LeCroy Corporation.
LeCroy, Easywave, SMART Trigger, PowerMeasure, and ProBus are registered trademarks
of LeCroy Corporation.
919202 RevA
Contents
Table of Contents
Overview
Description .................................................................................................................................. 1-1
Applications ................................................................................................................................. 1-1
Conventions used in this Manual ................................................................................................ 1-2
Safety Information
!
Operator Safety ........................................................................................................................... 2-1
Operation
Connecting the Probe to the Test Instrument ............................................................................. 3-1
Connecting the Probe to the Test Circuit ..................................................................................... 3-1
Probe Input Loading .................................................................................................................... 3-3
Grounding the Probe ................................................................................................................... 3-4
Selecting the Proper Range ........................................................................................................ 3-5
Operation with LeCroy Oscilloscopes ......................................................................................... 3-7
Adding Offset ............................................................................................................................ 3-11
Autobalance .............................................................................................................................. 3-12
Designing Test Fixtures for the AP033 Probe ........................................................................... 3-13
Reference Information
Differential Mode and Common Mode ........................................................................................ 4-1
Differential Mode Range and Common Mode Range ................................................................... 4-1
Common Mode Rejection Ratio .................................................................................................. 4-2
Remote Commands
Remote Control ........................................................................................................................... 5-1
Command List .............................................................................................................................. 5-1
Gain Control Mode ...................................................................................................................... 5-2
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919202 RevA
Rev F
AP033-OM-E
ISSUED: October 2001
Care and Maintenance
Cleaning ...................................................................................................................................... 6-1
iii
AP033 Active Probe
Calibration Interval ......................................................................................................................
Service Strategy ...........................................................................................................................
Troubleshooting ..........................................................................................................................
A. Trace Off Scale ..........................................................................................................
B. Incorrect Frequency Response ..................................................................................
C. DC Errors ...................................................................................................................
D. Poor Common Mode Rejection ................................................................................
Returning a Probe .......................................................................................................................
Replacement Parts ......................................................................................................................
6-1
6-1
6-1
6-1
6-3
6-3
6-3
6-4
6-5
Matching Procedure for
÷10
Plug-On External Attenuator .......................................................... 6-8
Equipment Required ................................................................................................................... 6-8
Procedure .................................................................................................................................... 6-9
Performance Verification
Test Equipment Required ........................................................................................................... 7-1
Preliminary Procedure ................................................................................................................. 7-3
Procedure .................................................................................................................................... 7-4
A. Check Gain Accuracy ................................................................................................ 7-4
B. Check High Frequency CMRR .................................................................................. 7-7
C. Check Low Frequency CMRR ................................................................................. 7-10
Adjustment Procedure
Introduction .................................................................................................................................
Test Equipment Required ...........................................................................................................
Preliminary Procedure .................................................................................................................
Procedure ....................................................................................................................................
A. Adjust Preliminary Probe DC Balance (R36) .............................................................
B. Adjust Coarse DC Balance (R226) ............................................................................
C. Adjust Fine DC Balance (R304) ................................................................................
D. Adjust
÷10
Attenuator CMRR (R7) ..........................................................................
E. Adjust Offset (R330) ................................................................................................
F. Adjust Gain (R322C) ................................................................................................
G. Adjust Final Attenuator Compensation (C17) ..........................................................
8-1
8-2
8-4
8-7
8-7
8-8
8-9
iv
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ISSUED: October 2001
8-10
8-12
8-14
8-15
919202 RevA
AP033-OM-E Rev F
Contents
H. Adjust Final Attenuator CMRR (C18A) .................................................................... 8-16
I. Assemble Probe and Amplifier .................................................................................. 8-17
J. Attenuator Matching and Final Check ...................................................................... 8-18
!
Specifications
Nominal Characteristics .............................................................................................................. 9-1
Warranted Electrical Characteristics ........................................................................................... 9-2
Typical Electrical Characteristics ................................................................................................ 9-3
General Characteristics ............................................................................................................... 9-5
Compliance and Certifications .................................................................................................... 9-6
Safety Information ....................................................................................................................... 9-6
Operator Safety ............................................................................................................... 9-6
Standard Accessories ................................................................................................................. 9-7
Optional Accessories .................................................................................................................. 9-7
Oscilloscope Software Compatibility ........................................................................................... 9-7
Appendix
AP033 Performance Verification Test Record ............................................................................ A-1
# # #
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919202 RevA
Rev F
AP033-OM-E
ISSUED: October 2001
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