Sony Tektronix AWG2021 User manual

Service Manual
AWG2021
Arbitrary Waveform Generator
070-9098-08
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to
performing service.

Copyright ESony/Tektronix Corporation. All rights reserved.
Copyright ETektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in Japan.
Sony/Tektronix Corporation, P.O.Box 5209, Tokyo Int’l, Tokyo 100–31 Japan
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either
will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the
defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or connection to incompatible equipment; or c) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time or
difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX
AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

AWG2021 Service Manual i
Table of Contents
General Safety Summary ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Characteristics 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Conditions 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Traits 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Characteristics 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information
Preparation for Use 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplying Power 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cord Information 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Environment 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation Requirements 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel Controls 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Type and Rating 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applying and Interrupting Power 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-on Cycle 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-off Cycle 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Backup Power 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installed Options 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Instructions 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Power On 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Diagnostics and Calibration Routines 2–9. . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menus 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Files 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Storage and I/O 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Files 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Output Parameters 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Mode Settings 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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ii AWG2021 Service Manual
Theory of Operation
Module Overview 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Synthesizer (A10, Synthesizer Board) 3–1. . . . . . . . . . . . . . . . . . . . . . . .
CH1/CH2 Clock Divider (A21/A31, Control Board) 3–1. . . . . . . . . . . . . . . . . .
Waveform Memory Control (A21, Control Board) 3–1. . . . . . . . . . . . . . . . . . .
Waveform Memory (A21, Control Board) 3–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Digital-to-Analog Converter (DAC) (A21, Control Board) 3–2. . . . . . . . . . . . .
Analog Processing (A3, Analog Board) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU and Memory (A6, CPU Board) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GPIB (A6, CPU Board) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232-C (A6, CPU Board) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Control (A6, CPU Board) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Monitor 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel (A12, Keyboard) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floppy Disk Drive 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Voltage Power Supply (A4 Power Board) 3–3. . . . . . . . . . . . . . . . . . . . . .
Fan 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Performance Verification Procedures 4–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Tests 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Tests 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Information 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Check/Adjustment Files 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Mode Checks 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Arithmetic Operation Checks 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Frequency and Amplitude Checks 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain and Offset Accuracy Checks 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Response Check 4–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYNC Out and MARKER Out Amplitude Checks 4–40. . . . . . . . . . . . . . . . . . . . . . .
External Trigger Level Accuracy Check 4–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External CLOCK IN Check 4–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECL Digital Data Out Check (Option 03) 4–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTL DIGITAL DATA OUT Check (Option 04) 4–51. . . . . . . . . . . . . . . . . . . . . . . . .
Floating Point Processor Check (Option 09) 4–54. . . . . . . . . . . . . . . . . . . . . . . . . . . .

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AWG2021 Service Manual iii
Adj stment Proced res
Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Performance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Adjustments 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Providing Access 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Check/Adjustment Files 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X5 Amplifier HF Compensation 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
Maintenance 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing ESD 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Care 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation Procedures 6–9. . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Mechanical Parts 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Instructions 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Procedures 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AWG2021 Orientation 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access Procedure 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for External Modules 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front-panel Knob 6–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Fuse and Line Cord 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Cover and Cabinet 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMI Gaskets 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover, Trim Ring, and Menu Buttons 6–20. . . . . . . . . . . . . . . . . . . . . . . . .
Front-panel Module 6–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for Internal Modules 6–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A4 Power Board, A3 Analog Board, and A23 Analog Board
(Option 02) 6–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector Module 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan and Fan Frame 6–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Shield Cover 6–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear BNC Connector 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Module 6–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Inlet and AUX Power Board 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitor Module and CRT Frame 6–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Boards 6–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A5 Backplane Board 6–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lithium Battery 6–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floppy-disk Drive Module 6–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
After Repair Adjustment 6–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Procedures 6–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AWG2021 Diagnostics 6–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Diagnostics Tests 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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iv AWG2021 Service Manual
Options
Options and Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options A1–A5 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 02 Description 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 03 Description 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Output 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Output 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Connector Configuration 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 7–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Circuit and Output Waveform 7–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Suggestions 7–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 04 Description 7–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Output 7–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Output 7–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Connector Configuration 7–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 7–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Circuit and Output Waveform 7–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example 7–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Regeneration 7–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 09 Description 7–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 1R Description 7–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 1S Description 7–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 95 Description 7–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 7–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 7–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 7–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Electrical Parts
Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagrams
Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Mechanical Parts
Replaceable Mechanical Parts 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
AWG2021 Service Manual v
List of Fig res
Figure 1–1: Timing for the Data and Clock Signals 1–11. . . . . . . . . . . . . . .
Figure 2–1: Rear Panel Controls 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2: Display Features 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–3: LOAD Menu 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4: SETUP Menu 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: MODE Menu 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–1: Diagnostics Menu 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2: Calibrations Menu 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–3: Cont Mode Initial Test Hookup 4–12. . . . . . . . . . . . . . . . . . . . .
Figure 4–4: Triggered Mode Initial Test Hookup 4–14. . . . . . . . . . . . . . . . .
Figure 4–5: Burst Mode Initial Test Hookup 4–16. . . . . . . . . . . . . . . . . . . .
Figure 4–6: Gated Mode Initial Test Hookup 4–18. . . . . . . . . . . . . . . . . . . .
Figure 4–7: Relationship Between 1 Volt or Greater Gate
Signal and Waveform Output Signal 4–20. . . . . . . . . . . . . . . . . . . . . . .
Figure 4–8: Waveform Advance Mode Initial Test Hookup 4–21. . . . . . . .
Figure 4–9:Autostep Mode Initial Test Hookup 4–23. . . . . . . . . . . . . . . . .
Figure 4–10: External AM Operation Initial Test Hookup 4–26. . . . . . . . .
Figure 4–11: MODE Menu Autostep Setting 4–27. . . . . . . . . . . . . . . . . . . .
Figure 4–12: Clock Frequency Accuracy Initial Test Hookup 4–30. . . . . .
Figure 4–13: Clock Amplitude Initial Test Hookup 4–32. . . . . . . . . . . . . . .
Figure 4–14: Gain Accuracy Initial Test Hookup 4–34. . . . . . . . . . . . . . . . .
Figure 4–15: Pulse Response Initial Test Hookup 4–37. . . . . . . . . . . . . . . .
Figure 4–16: Initial Test Hookup 4–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–17: External Trigger Level Accuracy Initial
Test Hookup 4–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–18: External CLOCK IN Initial Test Hookup 4–45. . . . . . . . . . .
Figure 4–19: ECL Digital Data Out Initial Test Hookup 4–48. . . . . . . . . .
Figure 4–20: Output Pins on the Termination Board 4–50. . . . . . . . . . . . .
Figure 4–21: TTL Digital Data Out Initial Test Hookup 4–51. . . . . . . . . . .
Figure 4–22: Output Pins on the TTL Digital Data Out Cable 4–53. . . . .
Figure 5–1: Cooling the AWG2021 During Adjustment
Procedures 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–2: Hookup for X5 Amplifier HF Compensation 5–5. . . . . . . . . .
Figure 5–3: C201 Locations for CH1 and CH2 5–7. . . . . . . . . . . . . . . . . .

Table of Contents
vi AWG2021 Service Manual
Figure 5–4: Hookup for Attenuator LF Compensation 5–8. . . . . . . . . . . .
Figure 5–5: PELTOLA Cable with BNC 5–8. . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–6: C301 Location 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1: AWG2021 Orientation 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Guide to Removal Procedures 6–12. . . . . . . . . . . . . . . . . . . . . .
Figure 6–3: External Modules 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–4: Internal Modules 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–5: Front-panel Knob Removal 6–16. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–6: Line Fuse and Line Cord Removal 6–17. . . . . . . . . . . . . . . . . .
Figure 6–7: Rear Cover and Cabinet Removal 6–19. . . . . . . . . . . . . . . . . .
Figure 6–8: Front Cover, Trim Ring, and Menu Button Removal
(Front Cover not Shown) 6–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–9: Front-panel Module Removal 6–23. . . . . . . . . . . . . . . . . . . . . .
Figure 6–10:A12 Keyboard Removal 6–24. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–11: Disassembly of Front-panel Module 6–25. . . . . . . . . . . . . . . .
Figure 6–12:A4 Power Board Removal 6–27. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–13:A3/A23 Analog Board Removal 6–29. . . . . . . . . . . . . . . . . . . .
Figure 6–14: Connector Module Removal 6–30. . . . . . . . . . . . . . . . . . . . . .
Figure 6–15: Fan and Fan Frame Removal 6–32. . . . . . . . . . . . . . . . . . . . .
Figure 6–16: Rear Shield Cover Removal 6–33. . . . . . . . . . . . . . . . . . . . . . .
Figure 6–17: Rear BNC Connector Removal 6–35. . . . . . . . . . . . . . . . . . . .
Figure 6–18: Power Supply Module Removal 6–36. . . . . . . . . . . . . . . . . . .
Figure 6–19:AUX Power Board and AC Inlet Removal 6–38. . . . . . . . . . .
Figure 6–20: Monitor Module Removal 6–40. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–21: CRT Frame Removal 6–41. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–22: Board Removal 6–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–23:A5 Backplane Board Removal 6–47. . . . . . . . . . . . . . . . . . . . .
Figure 6–24: Battery Location on the A5 Backplane Board 6–49. . . . . . . .
Figure 6–25: Floppy-disk Drive Module Removal 6–51. . . . . . . . . . . . . . . .
Figure 6–26:A6 CPU Board 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–27: Primary Troubleshooting Procedure 6–55. . . . . . . . . . . . . . .
Figure 6–28: Troubleshooting Procedure 1 —Power
Supply Module 6–56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–29:AUX Power Board 6–57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–30: Power Supply Module 6–57. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–31:A10 Synthesizer Board 6–58. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–32:A3/A23 Analog Board 6–58. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–33: Troubleshooting Procedure 2 —A6 CPU Board
or Front-panel Module 6–59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–34: Key Board 6–60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
AWG2021 Service Manual vii
Figure 6–35: Troubleshooting Procedure 3 —Monitor Module 6–61. . . .
Figure 6–36: Monitor Module 6–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–37: Horizontal and Vertical Sync Signals 6–62. . . . . . . . . . . . . . .
Figure 6–38:A Video Signal with White and Black Levels 6–63. . . . . . . . .
Figure 6–39: Troubleshooting Procedure 4 —Module Isolation 6–64. . . .
Figure 7–1: Option 03 Block Diagram 7–3. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–2: Option 03 Output Connector 7–4. . . . . . . . . . . . . . . . . . . . . . .
Figure 7–3: Generation of Excess Output 7–5. . . . . . . . . . . . . . . . . . . . . . .
Figure 7–4: Output Circuit 7–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–5: Output Waveform 7–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–6: Data Latching 7–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–7: Coaxial Cable End Processing 7–8. . . . . . . . . . . . . . . . . . . . . .
Figure 7–8: Cable Examples 7–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–9: Digital Data Latch Example 7–10. . . . . . . . . . . . . . . . . . . . . . .
Figure 7–10: Block Diagram 7–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–11: Option 04 Output Connector 7–12. . . . . . . . . . . . . . . . . . . . . .
Figure 7–12: Generation of Excess Output 7–13. . . . . . . . . . . . . . . . . . . . . .
Figure 7–13: Output Circuit 7–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–14: Output Waveform 7–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–15: Data Latching 7–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–16: Digital Data Out Cable 7–15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–17: Example of Waveform Reproduction Circuit 7–16. . . . . . . .
Figure 9–1: Block Diagram of AWG2021 with Options 02 and 09 9–3. . .
Figure 9–2: Block Diagram of AWG2021 with Options 02 and 03 9–4. . .
Figure 9–3: Block Diagram of AWG2021 with Options 02 and 04 9–5. . .
Figure 9–4: Interconnect Diagram of AWG2021 with
Options 02, 04, and 09 9–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–5: Interconnect Diagram of AWG2021 Option 03 9–7. . . . . . . .
Figure 10–1: Cabinet 10–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–2: Main Chassis and CRT 10–7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–3: Main Chassis and Circuit Boards 10–9. . . . . . . . . . . . . . . . . .
Figure 10–4: Circuit Boards 10–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–5: Front Panel Assembly 10–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–6: Option 02 10–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–7: Option 03 10–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–8: Option 04 10–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–9: Option 09 10–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
viii AWG2021 Service Manual
List of Tables
Table 1–1: Electrical Characteristics 1–4. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–2: Mechanical Characteristics 1–8. . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–3: Electrical Characteristics 1–9. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–4: Environmental Characteristics 1–14. . . . . . . . . . . . . . . . . . . . . .
Table 1–5: Electrical Characteristics 1–15. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–6: Certifications and Compliances 1–15. . . . . . . . . . . . . . . . . . . . .
Table 2–1: Power-Cord Conductor Identification 2–2. . . . . . . . . . . . . . . .
Table 2–2: Power Cord Identification 2–3. . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–3: Fuse Type and Rating 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–1: Test Equipment 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–2: File List for Performance Check/Adjustment Disk 4–10. . . . .
Table 4–3: Clock Frequency Accuracy 4–31. . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–1: Test Equipment 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–2: File List for Performance Check/Adjustment Disk 5–4. . . . .
Table 6–1: Relative Susceptibility to Static-Discharge Damage 6–3. . . . .
Table 6–2: External Inspection Check List 6–5. . . . . . . . . . . . . . . . . . . . .
Table 6–3: Internal Inspection Check List 6–6. . . . . . . . . . . . . . . . . . . . . .
Table 6–4: Equipment Required 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6–5: Secondary Power Supply Voltages 6–58. . . . . . . . . . . . . . . . . . .
Table 7–1: International Power Cords 7–2. . . . . . . . . . . . . . . . . . . . . . . . .
Table 7–2: Option 03 Digital Output Signals 7–4. . . . . . . . . . . . . . . . . . . .
Table 7–3: Option 04 Connector Pin Assignments 7–12. . . . . . . . . . . . . . .
Table 7–4: Standard Accessories List 7–18. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7–5: Optional Accessories List 7–18. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7–6: Maintenance Kit Contents 7–19. . . . . . . . . . . . . . . . . . . . . . . . .

AWG2021 Service Manual ix
General Safety S mmary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
Only qualified personnel should perform service procedures.
Inj ry Preca tions
To avoid fire hazard, use only the power cord specified for this product.
To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is
outside the range specified for that terminal.
This product is grounded through the grounding conductor of the power cord. To
avoid electric shock, the grounding conductor must be connected to earth
ground. Before making connections to the input or output terminals of the
product, ensure that the product is properly grounded.
To avoid electric shock or fire hazard, do not operate this product with covers or
panels removed.
To avoid fire hazard, use only the fuse type and rating specified for this product.
To avoid electric shock, do not operate this product in wet or damp conditions.
To avoid injury or fire hazard, do not operate this product in an explosive
atmosphere.
Prod ct Damage Preca tions
Do not operate this product from a power source that applies more than the
voltage specified.
To prevent product overheating, provide proper ventilation.
If you suspect there is damage to this product, have it inspected by qualified
service personnel.
Use Proper Power Cord
Avoid Electric Overload
Gro nd the Prod ct
Do Not Operate Witho t
Covers
Use Proper F se
Do Not Operate in
Wet/Damp Conditions
Do Not Operate in
Explosive Atmosphere
Use Proper Power So rce
Provide Proper Ventilation
Do Not Operate With
S spected Fail res

General Safety Summary
xAWG2021 Service Manual
Safety Terms and Symbols
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
The following symbols may appear on the product:
DANGER
High Voltage
Protective Ground
(Earth) Terminal
ATTENTION
Refer to
Manual
Dou le
Insulated
Certifications and Compliances
CSA Certification includes the products and power cords appropriate for use in
the North America power network. All other power cords supplied are approved
for the country of use.
Terms in This Man al
Terms on the Prod ct
Symbols on the Prod ct
CSA Certified Power
Cords

AWG2021 Service Manual xi
Service Safety S mmary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do not perform internal service or adjustments of this product unless another
person capable of rendering first aid and resuscitation is present.
To avoid electric shock, disconnect the main power by means of the power cord
or, if provided, the power switch.
To avoid electric shock or injury, use extreme caution when handling the CRT.
Only qualified personnel familiar with CRT servicing procedures and precautions
should remove or install the CRT.
CRTs retain hazardous voltages for long periods of time after power is turned off.
Before attempting any servicing, discharge the CRT by shorting the anode to
chassis ground. When discharging the CRT, connect the discharge path to ground
and then the anode. Rough handling may cause the CRT to implode. Do not nick
or scratch the glass or subject it to undue pressure when removing or installing it.
When handling the CRT, wear safety goggles and heavy gloves for protection.
Dangerous voltages or currents may exist in this product. Disconnect power,
remove battery (if applicable), and disconnect test leads before removing
protective panels, soldering, or replacing components.
To avoid electric shock, do not touch exposed connections.
To avoid x-radiation exposure, do not modify or otherwise alter the high-voltage
circuitry or the CRT enclosure. X-ray emissions generated within this product
have been sufficiently shielded.
Do Not Service Alone
Disconnect Power
Use Ca tion When
Servicing the CRT
Use Care When Servicing
With Power On
XĆRadiation

Service Safety Summary
xii AWG2021 Service Manual

AWG2021 Service Manual xiii
Preface
This is the service manual for the AWG2021 Arbitrary Waveform Generator. The
manual contains information needed to service the AWG2021 to the module
level.
Man al Str ct re
This manual is divided into sections, such as Specifications and Theory of
Operation. Further, some sections are divided into subsections, such as Product
Description and Removal and Installation Procedures.
Sections containing procedures also contain introductions to those procedures.
Be sure to read these introductions because they provide information needed to
do the service correctly and efficiently. The following contains a brief description
of each manual section.
HSpecifications contains a description of the AWG2021 and the characteristics
that apply to it.
HOperating Information includes general information and operating instruc-
tions at the level needed to safely power on and service the AWG2021.
HTheory of Operation contains circuit descriptions that support general service
to the module level.
HPerformance Verification contains a collection of procedures for confirming
that the AWG2021 functions properly and meets warranted limits.
HAdjustment Procedures contains a collection of procedures for adjusting the
AWG2021 to meet warranted limits.
HMaintenance contains information and procedures for performing preventive
and corrective maintenance of the AWG2021. These instructions include
cleaning, module removal and installation, and fault isolation to the module.
HOptions contains information on servicing any of the factory-installed
options that your AWG2021 includes.
HElectrical Parts List contains a statement referring you to Mechanical Parts
List, where both electrical and mechanical modules are listed. See below.
HDiagrams contains block diagrams and an interconnection diagram useful in
isolating failed modules.
HMechanical Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.

Preface
xiv AWG2021 Service Manual
Man al Conventions
This manual uses certain conventions that you should become familiar with.
Some sections of the manual contain procedures for you to perform. To keep
those instructions clear and consistent, this manual uses the following
conventions:
HInstructions for menu selection follow this format: FRONT PANEL
BUTTON!Main Menu Button!Side Menu Button. For example, “Press
UTILITY!Misc!Reset to Factory!O.K.”
HNames of front panel controls and menus appear in the same case (initial
capitals, all uppercase, etc.) in the manual as is used on the AWG2021 front
panel and menus. Front panel names are all upper-case letters; for example,
MODE MENU, CH 1, etc.
HInstruction steps are numbered unless there is only one step.
Throughout this manual, any replaceable component, assembly, or part of the
AWG2021 is referred to generically as a module. In general, a module is an
assembly (like a circuit board), rather than a component (like a resistor or an
integrated circuit). Sometimes a single component is a module; for example, the
chassis of the AWG2021 is a module.
Symbols and terms related to safety appear in the Safety Summary near the
beginning of this manual.
Finding Other Information
Other documentation for the AWG2021 Arbitrary Waveform Generator includes:
HThe AWG2021 User Manual contains a tutorial to quickly describe how to
operate the AWG2021. It also includes an in-depth discussion on how to
more completely use AWG2021 features.
HThe AWG2021 Programmer Manual explains how to control the AWG2021
with a computer through the GPIB or RS-232-C interface.
Mod les
Safety

AWG2021 Service Manual xv
Introd ction
This manual contains information needed to properly service the AWG2021
Arbitrary Waveform Generator, as well as general information critical to safe and
effective servicing.
To prevent personal injury or damage to the AWG2021, consider the following
before attempting service:
HThe procedures in this manual should be performed only by a qualified
service person
HRead the General Safety Summary and the Service Safety Summary,
beginning on page ix near the beginning of this manual
HRead Preparation for Use in section 2, Operating Information
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Adj stment Interval
Generally, the manual adjustments described in section 5, Adjustment Proce-
dures, should be done every 12 months. In addition, adjustment is recommended
after module replacement.
Strategy for Servicing
Throughout this manual, the term, module, refers to any field-replaceable
component, assembly, or part of the AWG2021.
This manual contains all the information needed for periodic maintenance of the
AWG2021. (Examples of such information are procedures for checking
performance and for readjustment.)
Further, it contains all information for corrective maintenance down to the
module level. To isolate a failure to a module, use the fault isolation procedures
found in Troubleshooting, part of section 6, Maintenance. To remove and replace
any failed module, follow the instructions in Removal and Installation Proce-
dures, also part of section 6. After isolating a faulty module, replace it with a
fully-tested module obtained from the factory. Section 10, Mechanical Parts
List, contains part number and ordering information for all replaceable modules.

Introduction
xvi AWG2021 Service Manual
Tektronix Service Offerings
Tektronix provides service to cover repair under warranty as well as other
services that may provide a cost-effective answer to your service needs.
Whether providing warranty repair service or any of the other services listed
below, Tektronix service technicians are well equipped to service the AWG2021.
Tektronix technicians train on Tektronix products; they have access to the latest
information on improvements to the AWG2021 as well as the latest new options.
Tektronix warrants this product for one year from date of purchase. (The
warranty appears on the back of the title page in this manual.) Tektronix
technicians provide warranty service at most Tektronix service locations
worldwide. The Tektronix product catalog lists all service locations worldwide.
The following services can be purchased to tailor repair and/or calibration of the
AWG2021 to fit your requirements.
AtĆdepot Service. Tektronix offers several standard-priced adjustment (calibra-
tion) and repair services:
HA single repair and/or adjustment
HCalibrations using equipment and procedures that meet the traceability
standards specific to the local area
HAnnual maintenance agreements that provide for either calibration and repair
or calibration only of the AWG2021
Of these services, the annual maintenance agreement offers a particularly
cost-effective approach to service for many owners of the AWG2021.
Tektronix supports repair to the module level by providing Module Exchange.
Mod le Exchange. This service reduces down-time for repair by allowing you to
exchange most modules for remanufactured ones. Tektronix ships an updated and
tested exchange module from the Beaverton, Oregon service center, typically
within 24 hours. Each module comes with a 90-day service warranty.
For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of the repair or adjustment services just
described.
Warranty Repair Service
Repair or Calibration
Service
Self Service