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COMMITTED TO EXCELLENCE

91A24/91AE24
SERVICE MANUAL ADDENDUM
TO THE DAS9100 SERIES SERVICE MANUAL
(PART NUMBERS 062-5848-00, -01, AND UP)

The 062-5848-00 manual set is a package consisting of loose leaf binders with
manuals and addenda. Each manual and addendum in the set has its own part
number starting with the prefix 070. You can find your manual part number in the
bottom left conmer of the manual title page.

This addendum contains service information specific to the 91 A24 and 91 AE24
Data Acquisition Modules. Refer to the DAS 9100 Series Service Manual for
information on other DAS products, including mainframes, instrument modules,
probes, and options.

How To Use This Addendum. This addendum is organized similarly to the DAS
9100 Series Service Manual: sections in the addendum correspond to the sections
in the service manual. You can either leave the addendum whole and place it in one
of the service manual binders, or you can separate the sections and insert them af-
ter the corresponding section in the main manual.

NOTE: You can order an extra service manual binder (Vol. III) by using
PIN 016-0769-00.

PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL

070-4541-00
Product Group 57 FIRST PRINTING MARCH, 1984
Copyright @) 1984, Tektronix, Inc.
All rights reserved.

Tektronix, Inc.
Walker Road Industrial Park
P.O. Box 4600
Beaverton, Or. 97075
DAS 9100 Series - 91A24/91AE24 Service

TABLE OF CONTENTS
Page
List of Illustrations ...................................................... vi
List of Tables .......................................................... viii
Operator's Safety Summary .............................................. x
Service Safety Summary ................................................. xii
I WARNING I
The following service instructions are for use by qualified personnel only. To
avoid personal injury, do not perform any servicing other than that contained
in the operating instructions unless you are qualified to do so.

SECTION 1 INTRODUCTION AND SPECIFICATIONS
Description ............................................................ 1-1
Modes of Operation ..................................................... 1-1
Data Acquisition ...................................................... 1-1
ARMS Trigger Mode .................................................. 1-1
Standard and Optional Accessories ........................................ 1-2
91 A24 Data Acquisition Module ......................................... 1-2
91 AE24 Data Acquisition Module ........................................ 1-2
P6460 Data Acquisition Probe .......................................... 1-2
P6462 Data Acquisition Probe .......................................... 1-3
Specifications .......................................................... 1-4
91 A24 and 91 AE24 Electrical Specifications: Data Acquisition and Storage ...... 1-4
91 A24 and 91 AE24 Electrical Specifications: Clocking ....................... 1-5
91 A24 and 91 AE24 Electrical Specifications: Word Recognizer Functions ....... 1-6
91A24 and 91AE24 Electrical Specifications: Probe Interface and Support 1-7
91 A24 and 91 AE24 Environmental Specifications ........................... 1-7
P6460 Electrical Specifications .......................................... 1-7
P6460 Environmental Specifications ...................................... 1-7
P6460 Physical Specifications ........................................... 1-8
P6462 Electrical Specifications .......................................... 1-9
P6462 Environmental Specifications ...................................... 1-1 0
P6462 Physical Specifications ........................................... 1-10

SECTION 2 OPTIONS

SECTION 3 OPERATING INSTRUCTIONS
Firmware and Hardware Compatibility ...................................... 3-1
Module Installation ...................................................... 3-2
Configuration Requirements ............................................ 3-2
Module Interconnection Procedures ...................................... 3-3
Connecting Acquisition Probes ............................................ 3-5
P6460 Probe Characteristics ............................................ 3-6
P6462 Probe Characteristics ............................................ 3-7
Operator's Checkout Procedure ........................................... 3-7
Power-up Self Test ................................................... 3-7
Probe Self Test ...................................................... 3-8
DAS 9100 Series - 91A24/91AE24 Service

TABLE OF CONTENTS (cont.)
Page

SECTION 4 THEORY OF OPERATION
Section Organization ................................................. . 4-1
Logic Conventions ................................................... . 4-1
System Architecture .................................................... . 4-1
91 A24 Data Acquisition Module ........................................ . 4-1
91 AE24 Data Acquisition Module ....................................... . 4-2
General System Description ............................................. . 4-2
91 A24 Data Acquisition Module ........................................ . 4-2
91 AE24 Data Acquisition Module ....................................... . 4-6
Detailed Circuit Description .............................................. . 4-8
91 A24 Data Acquisition Module ........................................ . 4-8
. 91A24 Controller Interface ~ ........................................ . 4-9
91 A24 Controller Interface Readback Circuitry ~ ........................ . 4-11
91 A24 Probe A and B Receivers ~ .................................. . 4-11
91 A24 Probe Interface and Probe C~eceiver

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