Tektronix P6231 User manual

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TEK
INSTRUCTION
MANUAL
First Printing MAY 1986
Revised SEP 1987
P6231
PROBE
Please Check for
Part No. 070-6027-00
Product Group 60
CHANGE INFORMATION
at the Rear of This Manual

Copyright C> 1986 Tektronix, Inc. All rights reserved.
Contents of this publication may not be reproduced in any
form without the written permission of Tektronix, Inc.
Products of Tektronix, Inc. and its subsidiaries are covered
by U.S. and foreign patents and/or pending patents.
TEKTRONIX, TEK, SCOPE.MOBILE, and 8 are
registered trademarks of Tektronix, Inc. TELEQUIPMENT
is a registered trademark of Tektronix U.K. Limited.
Printed in U.S.A. Specification and price change privileges
are reserved.
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TABLE OF CONTENTS
LIST OF ILLUSTRATIONS ............................................. .iii
liST OF TABlES............................................................v
OPERATORS SAFETY SUMMARY ................................ vi
SERVICING SAFETY SUMMARY ................................... vii
SECTION 1 SPECIFICATION
DESCRIPTION ............................................... 1.1
ACCESSORIES ............................................. 1-1
PERFORMANCE CONDITIONS .................... 1-2
SECTION 2 OPERATING INSTRUCTIONS
INTRODUCTION ............................................ 2·1
OPERATING CONSIDERATIONS................. 2-1
Probe Handling .. "' ...................................... 2.1
Input Dynamic Range ................................ 2-1
Probe Grounding ........................................ 2-2
CONTROLS AND CONNECTORS ................ 2-4
PROBE ACCESSORIES ................................ 2-4
OPERATION .................................................. 2-7
P6231
SECTION 3 PERFORMANCE CHECK
PURPOSE ...................................................... 3-1
TEST EQUIPMENT REQUIRED .................... 3-1
LIMITS AND TOLERANCES ......................... 3-1
PREPARATION .............................................. 3-1
PROCEDURE STEPS .................................... 3-3
DC Offset Check ........................................3-3
Bandwidth/Rise Time
High-Frequency Aberrations Check ...........3-5
WAit"'''. I
The following servicing instructions are for use by
qualified personnel only. To avoid personal injury, do
not perform any servicing other than that contained in
operating instructions unless you are qualified to do
so.

TABLE OF CONTENTS (cont)
SECTION 4 ADJUSTMENT PROCEDURE
PURPOSE ...................................................... 4-1
TEST EQUIPMENT REQUIRED ..............•...•. 4-1
ADJUSTMENT SEQUENCE .......................... 4-1
ADJUSTMENT LOCATIONS .......•................. 4-1
PREPARATION .............................................. 4-2
PROCEDURE STEPS ••.....•••....................•...•. 4-4
Check/Adjust Offset NulI.. .......•....•............. 4-4
Check/Adjust Attenuation Aoouracy
and Mid-Frequency Response ................... 4-4
SECTION 5 THEORY OF OPERATION
INTRODUCTION ............................................ 5-1
GENERAL CIRCUIT DESCRIPTION .......•..... 5-1
DETAILED CIRCUIT DESCRIPTION ............ 5-1
SECTION 6 MAINTENANCE
INTRODUCTION ............................................ 6-1
STATIC-SENSITIVE COMPONENTS ........... 6-1
PREVENTIVE MAINTENANCE .....................6-3
Cleaning......................................................6-3
Vlsuallnspection..•.......•...•...••..•...........•.•... 6-4
Semiconductor Checks .............................. 6-4
TROUBLESHOOTING ................................... 6-4
Troubleshooting Techniques ...................... 6-9
CORRECTIVE MAINTENANCE ................... 6-10
Maintenance Precautions .......................... 6-10
Obtaining Replacement Parts .................... 6-10
PROBE DISASSEMBL y................................ 6-11
Control Box. Disassembly.......................... 6-11
Cable Assembly Replacement ................... 6-12
Probe TIP Replacement ............................. 6-13
Button Replacement .................................. 6-13
READJUSTMENT AFTER REPAIR .............. 6-13
INSTRUMENT REPACKING ......................... 6-13
SECTION 7 REPLACEABLE PARTS
DIAGRAMS
REPLACEABLE ELECTRICAL PARTS
REPLACEABLE MECHANICAL PARTS
OPTIONAL ACCESSORIES
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P6231
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LIST OF ILLUSTRATIONS
Figure Page
The P6231 Probe ............................................. viii
1-1 Typical input impedance versus
frequency ..........................................................1-6
2-1 Damaging effects of ground-
lead Inductance ................................................ 2-2
2-2 Reducing the effects of
ground-lead inductance....................................2-3
2-3
Controls. connectors, and
probe accessories ............................................ 2-5
2-4 Example of reduced loading ............................ 2-7
P8231
iii

LIST OF ILLUSTRATIONS (cont)
Page
Figure
3-1
Offset-check setup...........................................3-4
3-2
High-frequency check setup ............................ 3-4
4-1 P6231 adjustment locations ............................4-5
5-1 Functional block diagram.................................5-2
6-1 Disassembly of control box .............................6-12
7-1 Main circuit-board layout.
7-2 Flexible circuit-board layout.
7-2 Component layout for trouble shooting.
iv P6231

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LIST OF TABLES
Table Page
1-1 Electrical Characteristics..................................1-2
1-2 Environmental Characteristics .........................1-5
1-3 Physical Characteristics................................... 1-5
2-1 Typical Performance Effects
of Grounding COnftgurations............................2-6
3-1 Test Equipment Required ................................ 3-2
4-1 Test Equipment Required ................................4-2
6-1 Relative Susceptibility To Static
Discharge Damage ........................................... 6-2
6-2 Troubleshooting Equipment............................. 6-5
6-3 Fault Indication and Probable Cause .............. 6-5
P8231 v

OPERATORS SAFETY SUMMARY
The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and
cautions will be found throughout the manual where they apply. but may not appear in this summary.
Terms In This Manual
WARNING statements identify conditions or practices that
could result in personal injury or loss of life.
CAUTION statements identify conditions or practices that
could result in damage to the equipment or other property.
Do Not Operate In Explosive Atmospheres
To avoid explosion, do not operate this product in any ex-
plosive atmosphere unless it has been specifically certified
for such operation.
Do Not Remove Covers
To avoid personal injury, do not remove the product cov-
ers. Do not operate the product without the covers prop.
erly installed.
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P8231
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SERVICE SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Refer a/so to the preceding Operators Safety Summary.
00 Not Service Alone Use Care When Servicing With Power On
Do not perform internal service or adjustment of this pro- To aVoid personal injury, do not touch exposed connec-
duct unless another person
is present and capable of tions and components while power is on.
rendering first aid and resuscitation.
P6231
vii