VXI Agilent 75000 C Series User manual

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Agilent 75000 SERIES C
Model D20
Digital Functional Test
System
Service Manual
The information in this manual applies to the following equipment.
Agilent E1450A Timing Modules
Agilent E1451A Pattern I/O Modules
Agilent E1452A Terminating Pattern I/O Modules
Agilent E1453A Timing Pods
Agilent E1454A Pattern I/O Pods
Agilent E1455A Timing Pods
Agilent E1456A Pattern I/O Pods
*E1458-90002*
E1450-90010
Copyright © Agilent Technologies, Inc, 1992 - 2006
Manual Part Number: E1450-90010
Microfiche Part Number: E1450-99010
Printed: September 2012 Edition 1
Printed in Malaysia E012

Certification
Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory. Agilent
Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and
Technology(formerlyNationalBureauof Standards),totheextentallowedbythatorganization’scalibrationfacility,andtothecalibration
facilities of other International Standards Organization members.
Warranty
This Agilent Technologies product is warranted against defects in materials and workmanship for a period of one (1) year from date of
shipment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part
of) other Agilent products. During the warranty period, Agilent Technologies will, at its option, either repair or replace products which
prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies. Buyer shall prepay
shipping charges to Agilent and Agilent shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping
charges, duties, and taxes for products returned to Agilent from another country.
Agilent warrants that its software and firmware designated by Agilent for use with a product will execute its programming instructions
when properly installed on that product. Agilent does not warrant that the operation of the product, or software, or firmware will be
uninterrupted or error free.
Limitation Of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied products
or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site
preparation or maintenance.
The design and implementation of any circuit on this product is the sole responsibility of the Buyer. Agilent does not warrant the Buyer’s
circuitry or malfunctions of Agilent products that result from the Buyer’s circuitry. In addition, Agilent does not warrant any damage that
occurs as a result of the Buyer’s circuit or any defects that result from Buyer-supplied products.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. Agilent SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. Agilent SHALL NOT BE LIABLE
FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CON-
TRACT, TORT, OR ANY OTHER LEGAL THEORY.
Notice
The information contained in this document is subject to change without notice. Agilent Technologies MAKES NO WARRANTY OF
ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Agilent shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing, performance or use of this material. This document contains
proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced,
or translated to another language without the prior written consent of Agilent Technologies, Inc. Agilent assumes no responsibility for the
use or reliability of its software on equipment that is not furnished by Agilent.
U.S. Government Restricted Rights
The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial
computer software" as defined in DFARS 252.227- 7013 (Oct 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014 (Jun
1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer software" as defined in FAR 52.227-19 (Jun 1987)(or
any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and
Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product involved.
Agilent E1450A through E1456A Model D20 Digital Functional Test System Service Manual
Edition 1 Rev 3
Copyright © 1992-2006 Agilent Technologies, Inc. All Rights Reserved.
i

Frame or chassis ground terminal—typically
connects to the equipment’s metal frame.
Alternating current (AC).
Direct current (DC).
Indicates hazardous voltages.
Calls attention to a procedure, practice, or con-
dition that could cause bodily injury or death.
Calls attention to a procedure, practice, or con-
dition that could possibly cause damage to
equipment or permanent loss of data.
Indicates the field wiring terminal that must
be connected to earth ground before operating
the equipment—protects against electrical
shock in case of fault.
Instruction manual symbol affixed to product.
Indicates that the user must refer to the man-
ual for specific WARNING or CAUTION
information to avoid personal injury or dam-
age to the product.
or
WARNINGS
The following general safety precautions must be observed during all phases of operation, service, and repair of this product.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design,
manufacture, and intended use of the product. Agilent Technologies assumes no liability for the customer’s failure to comply with
these requirements.
Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth
ground must be provided from the mains power source to the product input wiring terminals or supplied power cable.
DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.
For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type.
DO NOT use repaired fuses or short-circuited fuse holders.
Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal of
covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the
equipment switched off. To avoid dangerous electrical shock, DO NOT perform procedures involving cover or shield removal unless you
are qualified to do so.
DO NOT operate damaged equipment: Whenever it is possible that the safety protection features built into this product have been
impaired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until
safe operation can be verified by service-trained personnel. If necessary, return the product to an Agilent Technologies Sales and Service
Office for service and repair to ensure that safety features are maintained.
DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid and
resuscitation, is present.
DO NOTsubstitute parts or modify equipment: Because of the danger of introducing additional hazards, do not install substitute parts
or perform any unauthorized modification to the product. Return the product to an Agilent Technologies Sales and Service Office for
service and repair to ensure that safety features are maintained.
Printing History
The Printing History shown below lists all Editions and Updates of this manual and the printing date(s). The first printing of the manual
is Edition 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain
replacement pages to correct the current Edition of the manual. Updates are numbered sequentially starting with Update 1. When a new
Edition is created, it contains all the Update information for the previous Edition. Each new Edition or Update also includes a revised copy
of this printing history page. Many product updates or revisions do not require manual changes and, conversely, manual corrections may
be done without accompanying product changes. Therefore, do not expect a one-to-one correspondence between product updates and
manual updates.
Edition 1 (Part Number E1450-90010). . . . . . . . . . . . . . . . . . . . . . . . . June 1992
Edition 1 Rev 2 (Part Number E1450-90010) . . . . . . . . . . . . . . . . . . April 2006
Edition 1 Rev 3 (Part Number E1450-90010) . . . . . . . . . . . . September 2012
Safety Symbols
WARNING
CAUTION
ii

Declaration of Conformity
Declarations of Conformity for this product and for other Agilent products may be downloaded from the Internet. There are two methods to obtain
the Declaration of Conformity:
•Go to http://regulations.corporate.agilent.com/DoC/search.htm. You can then search by product number to find the latest Declaration
of Conformity.
•Alternately, you can go to the product web page (e.g., www.agilent.com/find/E1450A), click on the Document Library tab then
scroll down until you find the Declaration of Conformity link.

Model D20 Documentation
Suggested Sequence to Use Manuals/Notes
Manuals/Notes Descriptions
Manual/Note Title Description
SCPI Driver Installation Note
Model D20 Hardware Installation Guide
E1496A Software Installation Note
VXI System Installation and Getting Started
Guide
Model D20 Tutorial
Model D20 Task/Command Reference
Model D20 Service Manual
E1450A Hardware Manual
E1451A/52A Hardware Manual
Model D20 CLIP
Showshow to Install downloadable SCPI drivers in Agilent E1405B
Shows how to Install and configure the Model D20
Shows how to Install Agilent E1496ATest Development Software
Shows how to configure Agilent E1400B M/F & E1405B Cmd Module
Shows how to get started using the Model D20
Shows typical tasks and commands for the Model D20
Shows how to service the Model D20
Describes Agilent E1450A Timing Module hardware
Describes Agilent E1451A/52A Pattern Modules hardware
Model D20 schematics, component locators, and parts lists
v

What’s in this Manual
Manual Overview
This manual shows how to service the Agilent 75000 Series C Model D20 Digital Functional Test System
(Model D20). See Model D20 Documentation, page v, for additional manuals that may be required to service
the Model D20.
Manual Content
Chap Title Content
1 General
Information Lists basic Model D20 description, tools and test equipment required for service, and procedures to inspect and ship the Model D20.
2 Verification
Tests Describes self-test, functional verification, and performance verification tests for the Model D20.
3 Replaceable
Parts Lists part numbers for user-replaceable parts in the Model D20. Provides information on ordering spare parts and module exchange.
4 Service Procedures to aid in fault isolation and repair of the Model D20.
5 DIAGnostic
Commands Describes the DIAGnostic commands for use in servicing the Model D20.
vi

Contents
Chapter 1 - General Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Model D20 WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Model D20 CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Service Programs Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Component Level Information Packet (CLIP) . . . . . . . . . . . . . . . . . 1-5
Operating/Storage Environments . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Inspection/Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Shipping Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Chapter 2 - Verification Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Test Conditions/Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Using the Light Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Model D20 Self-Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Test S-1: Model D20 Power-On Test . . . . . . . . . . . . . . . . . . . . . . 2-3
Test S-2: Model D20 Hardware Test . . . . . . . . . . . . . . . . . . . . . . 2-6
Functional Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Test F-1: Generating Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Test F-2: Recording Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Test F-3: Comparing Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Test F-4: Control Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Test F-5: Trigger Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Test F-6: Condition Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Test F-7: Marker Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Test F-8: End-If-Ready Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Test F-9: Clock Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
Test P-1: Subcycle Period Accuracy . . . . . . . . . . . . . . . . . . . . . . . 2-47
Test P-2: System Skew Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . 2-49
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Measurement Uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Test Accuracy Ratio (TAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Model D20 Service Manual Contents - 1

Chapter 3 - Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Replaceable Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Field Installation Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Model D20 Replaceable Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Model D20 Component Locators . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Chapter 4 - Service
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Service Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Recommended Repair Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Service Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Assembly/Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Preparing Modules for Disassembly . . . . . . . . . . . . . . . . . . . . . . . 4-9
Timing Module Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Pattern I/O Modules Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Repair/Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Soldering Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Post-Repair Safety Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Chapter 5 - DIAGnostic Commands
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
DIAGnostic:OSCillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
DIAGnostic:REGister . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
DIAGnostic:SEQuence:LOOP . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
DIAGnostic:SEQuence:MEMory . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
DIAGnostic:SYSTem:HEALth . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
DIAGnostic:TIMing:VALid? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Index
2 - Contents Model D20 Service Manual

1
General Information
Introduction This service manual contains information to test, troubleshoot, and repair
the Agilent 75000 Series C Model D20 Digital Functional Test System
(Model D20). Figure 1-1 shows a typical Model D20.
NOTE See "Model D20 Documentation", page iv, for a list of manuals that
describe Model D20 operation and hardware. The information in this
manual assumes you are familiar with Model D20 operation. If incoming
inspection is required, see "Inspection/Shipping" in this chapter.
Figure 1-1. Typical Model D20 Configuration
General Information 1-1

Safety
Information The Model D20 is a Safety Class I instrument that is provided with a
protective earth terminal when installed in the mainframe. Check the
mainframe, Model D20, and all related documentation for safety markings
and instructions before operating or servicing the Model D20.
See the WARNINGS page (page iii) for a summary of safety information.
Safety information to test and service the Model D20 follows and is also
found throughout this manual.
Model D20
WARNINGS Follow the WARNINGS listed to avoid possible injury to yourself or others
when operating, repairing, or servicing the Model D20.
WARNING SERVICE-TRAINED PERSONNEL ONLY. The information in this
manual is for service-trained personnel who are familiar with
electronic circuitry and are aware of the hazards involved. To
avoid personal injury or damage to the instrument, do not
perform procedures in this manual or do any servicing unless
you are qualified to do so.
CHECK MAINFRAME POWER SETTINGS. Before applying
power, verify that the mainframe setting matches the line
voltage and the correct fuse is installed. An uninterruptible
safety earth ground must be provided from the main power
source to the supplied power cord set.
GROUNDING REQUIREMENTS. Interruption of the protective
(grounding) conductor (inside or outside the mainframe) or
disconnecting the protective earth terminal will cause a
potential shock hazard that could result in personal injury.
(Grounding one conductor of a two-conductor outlet is not
sufficient protection.)
IMPAIRED PROTECTION. Whenever it is likely that instrument
protection has been impaired, the mainframe must be made
inoperative and be secured against any unintended operation.
REMOVE POWER IF POSSIBLE. Some procedures in this
manual may be performed with power supplied to the
mainframe while protective covers are removed. Energy
available at many points may, if contacted, result in personal
injury. (If service can be performed without power applied,
remove the power.)
1-2 General Information

WARNING USING AUTOTRANSFORMERS. If the mainframe is to be
energized via an autotransformer (for voltage reduction) make
sure the common terminal is connected to neutral (that is, the
grounded side of the main’s supply).
USE PROPER FUSES. For continued protection against fire
hazard, replace the line fuse(s) only with fuses of the same
current rating and type (such as normal blow, time delay, etc.).
Do not use repaired fuses or short-circuited fuseholders.
Model D20
CAUTIONS Follow the CAUTIONS listed to avoid possible damage to the equipment
when performing instrument operation, service, or repair.
CAUTION MAXIMUM VOLTAGE. Maximum positive voltage that may be
applied to the Ready In or TTL Trig In terminals of an Agilent E1450A
Timing Module is +5V. Maximum negative voltage that may be applied
to the ECL Trig In terminals of an Agilent E1450A Timing Module is
-5V.
STATIC ELECTRICITY. Static electricity is a major cause of
component failure. To prevent damage to the electrical components in
the Model D20, observe anti-static techniques when removing a Model
D20 module from the mainframe or when working on a Model D20
module. Also, be sure to tighten the front panel screws when installing a
Model D20 module in a mainframe slot.
General Information 1-3

Product
Information This section lists Model D20:
•specifications
•serial number information
•options
•service kit information
•service programs disk information
•component level information package (CLIP)
•environmental limits
•recommended test equipment
Specifications See Appendix A - Specifications in the Model D20 Task and Command
Reference Manual for Model D20 specifications.
Serial Numbers Figure 1-2 shows Agilent Technologies serial number structure. Model D20
modules covered by this manual are identified by the serial number prefixes
listed on the title page.
Options Model D20 components can be ordered separately or as part of a Digital
Functional Test System (Agilent E1493A) or Digital Test Development
System (Agilent E1494A). See the Agilent Technologies 75000 Family of
VXI Products catalog for option information.
Agilent Technologies Serial Numbers
Figure 1-2. Agilent Technologies Serial Numbers
1-4 General Information

Service
Programs Disk Included with this service manual is a Model D20 Service Programs disk.
This disk contains example programs for the self-tests and verification tests
described in Chapter 2 - Verification Tests, for the service routines in
Chapter 4 - Service, and for the DIAGnostic command examples in Chapter
5 - DIAGnostic Commands. The programs on the disk are in LIF format,
and the disk is intended for use in HP 9000 Series 200/300 (or equivalent)
computers. The disk has four files:
•FUNC_VER for self-test and functional verification tests
•PERF_VER for performance verification tests
•SERV_TST for service (troubleshooting) tests
•DIAG_CMD for DIAGnostic command examples
To run a self-test, functional verification test, performance verification test,
service test, or DIAGnostic command example:
•insert the Model D20 Service Programs disk in your disk drive
•load the file with LOAD "file_name"
•press RUN
•select the test/example desired
Component Level
Information Packet
(CLIP)
A Component Level Information Packet (CLIP) for the Model D20 is
available from Agilent Technologies (part number E1493-90033). Contact
your local Agilent Technologies Sales and Support Office for ordering
information.
Operating/Storage
Environments The Model D20 should be stored in a clean, dry environment. See Table 1-1
for recommended Model D20 operating/storage environments.
Table 1-1. Model D20 Environments
Temperature Relative Humidity
Operating
Environment 0oC to +55oC<65%(0oC to +40oC)
Storage/
Shipment -40oC to +75oC <65% (0oC to +40oC)
Recommended
Test Equipment See Table 1-2 for test equipment recommended to test and service the
Model D20. Essential requirements for each piece of test equipment are
listed in the Requirements column. You may substitute other equipment if it
meets the requirements in Table 1-2.
Table 1-2. Model D20 Recommended Test Equipment
General Information 1-5

Instrument Requirements Recommended
Model Use*
Controller,
GPIB GPIB compatibility as defined by IEEE Standard 488-1987 and the identical
ANSI Standard MC1.1: SH1, AH1, T2,
TE0, L2, LE0, SR0, RL0, PP0, DC0,
DT0, and C1, 2, 3, 4, 5
HP 9000 Series 300 F,O,
P,T
Mainframe Compatible with Model D20 E1400B/E1400T
(requires Agilent
E1405 Command
Module)
F,O,
P,T
Digital
Multimeter Voltage Range: ±10 VDC
Current Range: ±20 mA DC
Accuracy: ±(.015% reading + 1 mV)
±(.02% reading + 1 µA)
Agilent 3458A,
Agilent 3478A or
Agilent E1411B
F,O,
P,T
Digitizing
Oscilloscope Bandwidth: 60 MHz Vertical Sensitivity: 1V/div
Vertical input: 5V
External Trigger Capability
Agilent 54111D or
Agilent 54123T F,T
Universal
Counter Frequency Range: 12 MHz
Accuracy: ±0.001% Agilent 5334B P
*F = Functional Verification Tests, O = Operation Verification Tests, P = Performance Verification
Tests, T = Troubleshooting
Inspection/
Shipping This section shows initial (incoming) inspection and shipping guidelines for
the Model D20.
Initial
Inspection Use the steps in Figure 1-3 as guidelines to perform initial (incoming)
inspection of the Model D20.
WARNING To avoid possible hazardous electrical shock, do not perform
electrical tests if there are signs of shipping damage to the
shipping container or to the instrument.
1-6 General Information

Notify Agilent
Notify Agilent and carrier
Return Model D20 to Agilent
Figure 1-3. Initial (Incoming) Inspection Guidelines
General Information 1-7

Shipping
Guidelines Follow the steps in Figure 1-4 to return Model D20 modules/pods to an
Agilent Technologies Sales and Service Office or Service Center.
SHIPPING GUIDELINES
1 Remove Cables/Connectors/DUTs
•Remove DUTs from modules/pods
•Remove pods from modules
•Remove cables/connectors from modules/pods
2 Prepare Module/Pod
•Attach tag to module/pod that identifies
- owner
- Model Number/Serial Number
- Service Required
•Place tagged device in anti-static bag
3 Package Module/Pod
•Place packaged module in shipping carton*
•Place 75 to 100 mm (3 to 4 inches) of shock-
absorbing material around the module/pod
•Seal the shipping carton securely
•Mark the shipping carton FRAGILE
4Ship Module/Pod toAgilent Technologies
•Place address label on shipping carton **
•Send carton to Agilent Technologies
*We recommend you use the same shipping materials as those used in factory packaging (available from
Agilent Technologies). For other (commercially-available) shipping materials, use a double-wall carton with
minimum 2.4 MPa (350 psi) test.
Figure 1-4. Recommended Shipping Guidelines
1-8 General Information

2
Verification Tests
Introduction This chapter describes Model D20 self-tests, functional verification tests,
and performance verification tests. (There are no user adjustments for the
Model D20.) Table 2-1 defines Model D20 verification tests and suggests
when to use each type.
WARNING Do not perform any of the verification tests in this chapter
unless you are a qualified, service-trained person and have read
the WARNINGS and CAUTIONS in Chapter 1.
NOTE Specifications listed in Appendix A - Specifications of the Model D20 Task
and Command Reference, but not tested in this chapter, are defined to be
"Guaranteed by Design" (not required to be tested) if the Model D20 passes
the performance verification tests in this chapter.
Table 2-1. Model D20 Verification Test Definitions
Title Description When to Use:
Self-Tests Use power-on or TEST? to verify that
the Model D20 is operational and is
communicating with the computer.
When you want to verify
operation and/or
communication.
Functional
Verification
Tests
Gives a high probability that the Model
D20 is functional. These tests provide
a PASS/FAIL result.
At incoming inspection,
after module repair, or
whenever faulty operation
is suspected.
Performance
Verification
Tests
Verifies that the Model D20 meets all
testable specifications. These tests
PASS if the result is within defined
limits, or FAIL if the result is outside
the defined limits.
At incoming inspection or
at yearly intervals (more
often in harsh
environments).
Verification Tests 2-1