Tektronix HFS 9003 Service Manual

Service Manual

HFS 9003 Stimulus System

070-8564-02

Warning

The servicing instructions are for use by qualified personnel only. To avoi personal injury, do not perform any servicing unless you are qualified to do so. Refer to the Safety Summary prior to performing service.

that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.

WARRANTY

T ektronix 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, T ektronix, 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 T ektronix, with shipping charges prepaid. T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than T ektronix 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 CUST OMER 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.

Specifications

Operating Information

Theory of Operation

General Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Nominal Traits 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

W arranted Characteristics 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ypical Characteristics 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Menu Selections 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Resetting the HFS 9003 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting the Time Base 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The RUN/STOP Button 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The UNDO Button 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pulse Output 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strap Settings 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Module Descriptions 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mainframe 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Backplane 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supplies 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fans 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Panel Module 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cards 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CPU Card 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Base Card 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pulse Generator Cards 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Data Time Generator Cards 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Verification

Required Test Equipment 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Record 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verification Sequence 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Procedures 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HFS 9003 Service Manual

Self Test 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Adjustment Procedures

Maintenance

Instrument Setup 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Level Checks (HFS 9DG1 Card Only) 4–13. . . . . . . . . . . . . . . . . . . . . . .

Output Level Checks (HFS 9DG2 and HFS 9PG2 Cards Only) 4–16. . . . . . . . .

Output Level Checks (HFS 9PG1 Card Only) 4–19. . . . . . . . . . . . . . . . . . . . . . .

Trigger Output Level 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rise Time and Fall T ime Checks (HFS 9PG1 and HFS 9DG1 Cards Only) 4–22 Rise Time and Fall T ime Checks (HFS 9PG2 and HFS 9DG2 Cards Only) 4–25

Edge Placement Checks 4–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Frequency Accuracy Check 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Phase Lock Check 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required Test Equipment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembly for Adjustment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preventive Maintenance 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal and Replacement 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Panel Module 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cards 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mainframe Covers 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Assembly 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Module: +5 V, +12 V, and –12 V 6–6. . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Module: –5.2 V, –2 V, and +24 V 6–7. . . . . . . . . . . . . . . . . . . . . . . . .

Backplane Secondary Fuses 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Backplane 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fans 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ON/STANDBY Lamp 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ON/ST ANDBY Switch 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuses 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Modules 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Noise 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fans 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Backplane Connectors 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power-On Diagnostics 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self-Test Diagnostics 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Error Indications 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Procedure 6–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

Electrical Parts List

Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HFS 9003 Service Manual

Diagrams

Mechanical Parts List

List of Figures

Table of Contents

Block Diagram 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Parts List 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–1: HFS 9003 Mainframe and Front Panel 2–1. . . . . . . . . . . . . .

Figure 2–2: MAIN MENU, SELECT, and Arrow Button Locations 2–2.

Figure 2–3: Main Menu Display 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–4: The Time Base Menu 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–5: Mode set to Auto-Burst 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–6: Controls and Connectors for the Pulse, Data Time

Generator, and Time Base Cards 2–5. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3–1: Backplane Jumper Settings and Connections 3–2. . . . . . . . .

Figure 5–1: Rear Power Supply Voltage and Adjustment Locations 5–2. Figure 5–2: Front Power Supply Voltage and Adjustment Locations 5–2

Figure 6–1: Clock Distribution Cable Location 6–4. . . . . . . . . . . . . . . . . .

Figure 6–2: Backplane Jumper Settings 6–10. . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–3: The Location of LEDs on the CPU Card 6–20. . . . . . . . . . . . .

Figure 6–4: Bit Assignments for Diagnostic LEDs 6–21. . . . . . . . . . . . . . . .

Figure 6–5: Diagnostic Procedure Flowchart 6–24. . . . . . . . . . . . . . . . . . . .

Figure 9–1: Module Block and Interconnection Diagram 9–2. . . . . . . . . .

Figure 10–1: Front Panel 10–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–2: Rear Panel and Power Supply 10–7. . . . . . . . . . . . . . . . . . . . .

Figure 10–3: Circuit Boards and Fan Assembly 10–9. . . . . . . . . . . . . . . . .

Figure 10–4: Chassis and Covers 10–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HFS 9003 Service Manual

iii

Table of Contents

List of Tables

Table 1–1: Nominal Traits — HFS 9PG1 Output Performance 1–1. . . .

Table 1–2: Nominal Traits — HFS 9PG2 Output Performance 1–2. . . .

Table 1–3: Nominal Traits — HFS 9DG1 Output Performance 1–3. . . .

Table 1–4: Nominal Traits — HFS 9DG2 Output Performance 1–3. . . .

Table 1–5: Nominal Traits — Time Base 1–4. . . . . . . . . . . . . . . . . . . . . . .

Table 1–6: Nominal Traits — Performance to External Frequency

Reference 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–7: Nominal Traits — Output Edge Placement Performance 1–5

Table 1–8: Nominal Traits — Transducer In Performance 1–5. . . . . . . .

Table 1–9: Nominal Traits — Skew Cal In Performance 1–5. . . . . . . . . .

Table 1–10: Nominal Traits — Trigger In Performance 1–6. . . . . . . . . . .

Table 1–11: Nominal Traits — Trigger Out Performance 1–6. . . . . . . . .

Table 1–12: Nominal Traits — Power Requirements 1–6. . . . . . . . . . . . .

Table 1–13: Nominal Traits — System Memory Performance 1–6. . . . .

Table 1–14: Nominal Traits — HFS 9003 Mechanical 1–7. . . . . . . . . . . .

Table 1–15: Nominal Traits — HFS 9009 Mechanical 1–7. . . . . . . . . . . .

Table 1–16: Warranted Characteristics — HFS 9PG1 Output

Performance 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–17: Warranted Characteristics — HFS 9PG2 Output

Performance 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–18: Warranted Characteristics — HFS 9DG1 Output

Performance 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–19: Warranted Characteristics — HFS 9DG2 Output

Performance 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–20: Warranted Characteristics — Time Base 1–9. . . . . . . . . . . .

Table 1–21: Warranted Characteristic — Performance to External

Frequency Reference 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–22: Warranted Characteristics — Output Edge Placement

Performance 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–23: Warranted Characteristics — Trigger Out Performance 1–10 Table 1–24: Warranted Characteristics — Power Requirements 1–10. . . Table 1–25: Warranted Characteristics — Environmental and

Safety 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–26: Typical Characteristics — Time Base 1–11. . . . . . . . . . . . . . .

Table 1–27: Typical Characteristics — HFS 9PG1 Output

Performance 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HFS 9003 Service Manual

Table of Contents

Table 1–28: Typical Characteristics — HFS 9PG2 Output

Performance 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–29: Typical Characteristics — HFS 9DG1 Output

Performance 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–30: Typical Characteristics — HFS 9DG2 Output

Performance 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–31: Typical Characteristics — Performance to External

Frequency Reference 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–32: Typical Characteristics — Transducer In Performance 1–13

Table 1–33: Typical Characteristics — Trigger In Performance 1–13. . . .

Table 1–34: Typical Characteristics — Trigger Out Performance 1–14. .

Table 1–35: Typical Characteristics — Power Requirements 1–14. . . . . .

Table 4–1: Required Test Equipment 4–1. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–2: Trigger Output Level and Phase Lock Test 4–3. . . . . . . . . . . .

Table 4–3: Test Record for HFS 9DG1 Card 4–4. . . . . . . . . . . . . . . . . . . .

Table 4–4: Test Record for HFS 9DG2 Card 4–6. . . . . . . . . . . . . . . . . . . .

Table 4–5: Test Record for HFS 9PG1 Card 4–7. . . . . . . . . . . . . . . . . . . .

Table 4–6: Test Record for HFS 9PG2 Card 4–9. . . . . . . . . . . . . . . . . . . .

Table 4–7: HFS 9DG1 Output Level Checks, First Settings 4–14. . . . . . .

Table 4–8: HFS 9DG1 Output Level Checks, Second Settings 4–14. . . . .

Table 4–9: HFS 9DG1 Output Level Checks, Third Settings 4–15. . . . . . .

Table 4–10: HFS 9DG1 Output Level Checks, Fourth Settings 4–15. . . . .

Table 4–11: HFS 9DG2 and HFS 9PG2 Output Level Checks,

First Settings 4–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–12: HFS 9DG2 and HFS 9PG2 Output Level Checks, Second

Settings 4–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–13: HFS 9PG2 Output Level Checks, Third Settings 4–18. . . . . .

Table 4–14: HFS 9PG2 Output Level Checks, Fourth Settings 4–18. . . . .

Table 4–15: HFS 9PG1 Output Level Checks, First Settings 4–19. . . . . . .

Table 4–16: HFS 9PG1 Output Level Checks, Second Settings 4–20. . . . .

Table 4–17: HFS 9PG1 Output Level Checks, Third Settings 4–20. . . . . .

Table 4–18: HFS 9PG1 Output Level Checks, Fourth Settings 4–21. . . . .

Table 4–19: Settings for Trigger Output Check 4–22. . . . . . . . . . . . . . . . .

Table 4–20: Settings for Rise Time and Fall Time Checks 4–23. . . . . . . . .

Table 4–21: DSO Settings for Rise/Fall Time Checks 4–24. . . . . . . . . . . . .

Table 4–22: Settings for Rise Time and Fall Time Checks 4–25. . . . . . . . .

Table 4–23: DSO Settings for Rise/Fall Time Checks 4–26. . . . . . . . . . . . .

Table 4–24: Settings for Edge Placement Checks 4–27. . . . . . . . . . . . . . . .

Table 4–25: Lead Delay Limits for HFS 9PG1 and HFS 9PG2 4–28. . . . .

Table 4–26: Lead Delay Limits for HFS 9DG1 and HFS 9DG2 4–29. . . .

HFS 9003 Service Manual

Table of Contents

Table 4–27: Width Variance Limits for HFS 9PG1 4–29. . . . . . . . . . . . . . .

Table 4–28: Width Variance Limits for HFS 9DG1 4–30. . . . . . . . . . . . . .

Table 4–29: Width Limits for HFS 9PG1 and HFS 9PG2 4–30. . . . . . . . .

Table 4–30: Width Limits for HFS 9DG1 4–30. . . . . . . . . . . . . . . . . . . . . .

Table 4–31: Width Limits for HFS 9DG2 4–31. . . . . . . . . . . . . . . . . . . . . .

Table 4–32: Frequency Limits (HFS 9PG1 & HFS 9DG1) 4–32. . . . . . . . .

Table 4–33: Frequency Limits (HFS 9PG2) 4–32. . . . . . . . . . . . . . . . . . . . .

Table 4–34: Frequency Limits (HFS 9DG2) 4–33. . . . . . . . . . . . . . . . . . . .

Table 5–1: Power Supply Tolerances 5–2. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–1: Results from *TST? 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–2: Troubleshooting From the Error Index Code 6–22. . . . . . . . . .

HFS 9003 Service Manual

General Safety Summary

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.

Injury Precautions

Use Proper Power Cord

Avoid Electric Overload

Ground the Product

Do Not Operate Without

Covers

Use Proper Fuse

Do Not Operate in

Wet/Damp Conditions

Do Not Operate in

Explosive Atmosphere

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.

Product Damage Precautions

Use Proper Power Source

Provide Proper Ventilation

HFS 9003 Service Manual

Do not operate this product from a power source that applies more than the voltage specified.

To prevent product overheating, provide proper ventilation.

vii

General Safety Summary

Do Not Operate With

Suspected Failures

If you suspect there is damage to this product, have it inspected by qualified service personnel.

Safety Terms and Symbols

Terms in This Manual

Terms on the Product

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:

Symbols 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) T erminal

ATTENTION

Refer to

Manual

Double

Insulated

viii

HFS 9003 Service Manual

Certifications and Compliances

General Safety Summary

CSA Certified Power

Cords

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.

Consult the product specifications for IEC Installation Category, Pollution Degree, and Safety Class.

HFS 9003 Service Manual

General Safety Summary

HFS 9003 Service Manual

Service Safety Summary

Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service

procedures.

Do Not Service Alone

Disconnect Power

Use Care When Servicing

With Power On

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.

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.

HFS 9003 Service Manual

Service Safety Summary

xii

HFS 9003 Service Manual

Preface

This Service Manual provides you with limited service information for the HFS 9003 Stimulus System.

H The Specifications section contains all nominal, typical, and specified

characteristics. H The Operating Information section teaches you about each of the front panel

controls and how to input simple settings for basic operation. H The Theory of Operation section helps you understand the operation of each

of the replaceable modules in the HFS 9003. H The Performance Verification section gives you procedures on how to verify

the specified performance of the instrument. H The Adjustment Procedures section lists the adjustments you can make to the

instrument. H The Maintenance section instructs you on how to perform general preventive

maintenance on the instrument. This section also describes removal,

replacement and troubleshooting procedures.

Notation Conventions

H The Options section lists the options available from the factory. This section

also describes the procedure for installing field updates to the internal

programmed code of the instrument. H The Diagrams section describes and illustrates the major electrical sections

of the HFS 9003. H The Mechanical Parts List section lists all of the replaceable parts and

describes how to order these parts.

The following conventions are used in this manual:

H Signal names are printed in bold capital letters; for example, SENSE IN. H A signal active in the low state is shown with a tilde (~) in front of the signal

name; for example, ~ACFAIL. H Labels of front panel buttons and connectors are shown in bold capital

letters; for example, ENTER. H Labels of menu items are shown in mixed case bold text; for example, the

Pulse menu Amplitude item.

HFS 9003 Service Manual

xiii

Preface

Related Manuals

Refer to the HFS 9000 User Manual (070-8365-01) for additional operating information.

xiv

HFS 9003 Service Manual

Specifications

Nominal Traits

The HFS 9000 family of high-speed logic signal source instruments have a modular architecture with factory-configurable cards. The channels are digitally synthesized from a common clock resulting in highly accurate independent placement of rising and falling edges. The instruments are optimized for digital device characterization with unique triggering capabilities and a variety of pulse outputs. The product family also features low RMS jitter, the ability to compensate for external cable skews, and an easy-to-use graphical human interface.

This section contains the complete specifications for the HFS 9000 Stimulus System and Modules. These specifications are classified as either nominal traits, warranted characteristics, or typical characteristics.

Nominal traits are described using simple statements of fact such as “+2.6 V” for the trait “Maximum high level,” rather than in terms of limits that are performance requirements.

T able 1–1: Nominal Traits — HFS 9PG1 Output Performance

Each channel and complement driving a 50  load to ground, except as noted.

Name

Maximum high level +2.6 V Minimum low level –2.00 V Maximum amplitude 3.00 V Minimum amplitude 0.50 V Level resolution 0.01 V Operation when terminated

through 50  to –2 V

Description

Output levels will be approximately 1 V more negative than the values programmed, specified, and displayed. Actual output levels more negative than –2 V may cause malfunction. Level accuracy specifications do not apply when terminating to –2 V. Both true and complement outputs must be terminated to the same voltage.

HFS 9003 Service Manual

1–1

Specifications

T able 1–1: Nominal Traits — HFS 9PG1 Output Performance (Cont.)

Each channel and complement driving a 50  load to ground, except as noted.

Name Description

Operation when terminated to high impedance loads

Output limits One high limit and one low limit may be enabled or disabled

Output level range will double until certain internal limits are achieved. Since the programmed, specified, and displayed output levels do not match the actual output levels, level accuracy specifications do not apply when terminating to a high impedance load. Because of the larger voltage swings associated with doubled level range, output transition time specifications do not apply when driving a high impedance load.

together.

T able 1–2: Nominal Traits — HFS 9PG2 Output Performance

Each channel and complement driving a 50  load to ground, except as noted.

Name

Maximum high level +5.50 V Minimum low level –2.00 V Maximum amplitude 5.50 V Minimum amplitude 0.50 V Level resolution 0.01 V Operation when terminated

through 50  to –2 V

Transition time 20% to 80% V ariable from 800 ps to 5 ns Transition time resolution 10 ps Output limits One high limit and one low limit may be enabled or disabled

Description

together.

1–2

HFS 9003 Service Manual

T able 1–3: Nominal Traits — HFS 9DG1 Output Performance

Each channel and complement driving a 50  load to ground, except as noted.

Specifications

Name

Maximum high level +5.0V Minimum low level –2.5 V Maximum amplitude 3.00 V Minimum amplitude 0.01 V Level resolution 0.01V Operation when terminated

through 50  to –2 V

Operation when terminated to high impedance loads

Output limits One high limit and one low limit may be enabled or

Description

disabled together.

HFS 9003 Service Manual

T able 1–4: Nominal Traits — HFS 9DG2 Output Performance

Each channel and complement driving a 50  load to ground, except as noted.

Name

Maximum high level +5.50 V Minimum low level –2.00 V Maximum amplitude 5.50 V Minimum amplitude 0.01 V Level resolution 0.01 V Operation when terminated

through 50  to –2 V

Transition time 20% to 80% V ariable from 800 ps to 6 ns

Description

1–3

Specifications

T able 1–4: Nominal Traits — HFS 9DG2 Output Performance (Cont.)

Each channel and complement driving a 50 W load to ground, except as noted.

Name Description

Transition time resolution 10 ps Output limits One high limit and one low limit may be enabled or disabled

together.

T able 1–5: Nominal Traits — Time Base

Name Description

Frequency range HFS 9PG1, HFS 9DG1: 50 kHz to 630MHz

HFS 9PG2, HFS 9DG2: 50 kHz to 300 MHz

Frequency resolution ≤ 0.1% of frequency setting

Minimum frequency setting when using half, quarter, or eighth pulse rate modes

Number of pulse periods in burst

half pulse rate: 100 kHz quarter pulse rate: 200 kHz eighth pulse rate: 400 kHz

User selectable from 1 to 65,536

or auto-burst modes

If the HFS 9PG2 or HFS 9DG2 is operated in half pulse rate mode, frequency can be extended to 600 MHz for the HFS 9PG2 and 630 MHz for the HFS 9DG2.

All pulse rate modes result in 50 kHz output frequency.

T able 1–6: Nominal Traits — Performance to External Frequency Reference

Name Description PHASE LOCK IN input charac-

teristic Phase lock output frequency

range

FRAME SYNC IN Initiates a burst when using phase lock mode FRAME SYNC IN input charac-

teristic

0.1 mF DC blocking capacitor followed by 50W termination to ground

Any 2n multiple or sub-multiple of the phase lock frequency that is within the allowed frequency range for the card being used

50 W terminated to –2V

1–4

HFS 9003 Service Manual

T able 1–7: Nominal Traits — Output Edge Placement Performance1

Name Description

Channel deskew (Chan Delay) range, channels relative to time zero reference

Channel deskew (Chan Delay) resolution

–60 ns to 2.0ms

HFS 9PG1, HFS 9PG2: 5 ps HFS 9DG1, HFS 9DG2: 1 ps

Specifications

Delay (Lead Delay) adjustment range

Delay (Lead Delay, Trail Delay) adjustment resolution

Pulse width adjustment range HFS 9PG1, HFS 9PG2: Zero to (one period – 790 ps)

Pulse width adjustment resolution

Fine knob resolution of timing 5 ps

Measured at 50% levels, each channel independent.

Zero to 20 ms

HFS 9PG1, HFS 9PG2: 5 ps HFS 9DG1, HFS 9DG2: 1 ps

inclusive HFS 9DG1, HFS 9DG2: Zero to (one period × 65,536) inclusive

HFS 9PG1, HFS 9PG2: 5 ps HFS 9DG1, HFS 9DG2: 1 ps

T able 1–8: Nominal Traits — Transducer In Performance

Name Description TRANSDUCER IN input charac-

teristic

HFS 9PG1: 1000 pF DC blocking capacitor followed by 50 W termination to ground HFS 9PG2: 100 pF DC blocking capacitor followed by 50W termination to ground

HFS 9003 Service Manual

T able 1–9: Nominal Traits — Skew Cal In Performance

Name Description SKEW CAL IN usage Calibration use only . No signal, except from a channel

OUTPUT connector during the calibration process, should

ever be applied to this input.

1–5

Specifications

T able 1–10: Nominal Traits — Trigger In Performance

Name Description

Input Voltage range ±5 V maximum Trigger level range ±4.70 V Trigger level resolution 100 mV

T able 1–11: Nominal Traits — Trigger Out Performance

Name Description

Pretrigger range, TRIGGER OUT before time zero reference

TRIGGER OUT pulse width in auto mode

Zero to 70 ns

Width

(ns)

0.1

0.01 0.1 1 10 100 1000 Output Frequency (MHz)

T able 1–12: Nominal Traits — Power Requirements

Name HFS 9003 Description HFS 9009 Description

Fuse ratings 5 A, 250V, type 3AG,

(Tektronix part 159-0014-00), and

15 A, 250V, type 3AG, fast blow, (Tektronix part

159-0256-00) 4 A, 250V, type 3AG, fast blow, (Tektronix part 159-0017-00)

T able 1–13: Nominal Traits — System Memory Performance

Name Description

Non-volatile memory retention time

Instrument settings and calibration constants are retained in non-volatile memory for 5 years or more. Card identification is retained for 10 years. Extended storage above 50_ C may degrade the life of all non-volatile memory .

1–6

HFS 9003 Service Manual

Specifications

T able 1–14: Nominal Traits — HFS 9003 Mechanical

Name Description

Weight, in 12-channel configuration. (Shipping weight includes all standard accessories.)

Overall Dimensions Cabinet Rackmount

Cooling Method Forced-air circulation with no air filter, maximum 318 cfm Construction Material Chassis parts are constructed of aluminum alloy; bezel is

Net weight: 45 lbs. (20.5 kg) 51 lbs. (23.2 kg) Shipping weight: 60 lbs. (27.3 kg) 66 lbs. (30.0 kg)

Width: 16.3 in. (414 mm) 19.0 in (483 mm) Height: 7.0 in. (178 mm) 7.0 in. (178 mm) Depth: 24.75 in. (629 mm) 24.75 in. (629 mm) Depth behind rack flange: — 22.0 in. (559 mm)

glass-filled polycarbonate with Lexan plastic inserts; cabinet is aluminum with textured epoxy paint.

Cabinet Rackmount

T able 1–15: Nominal Traits — HFS 9009 Mechanical

Name Description

Weight, in 36-channel configuration. (Shipping weight includes all standard accessories.)

Overall Dimensions Rackmount

Cooling Method, mainframe Forced-air circulation with air filter, maximum 318 cfm Cooling Method, power supply Forced-air circulation, maximum 106 cfm Construction Material Chassis parts are constructed of aluminum alloy with Lexan

Net weight: 81 lbs. (33.7 kg) Shipping weight: 100 lbs. (45.3 kg)

Width: 16.75 in (425.79 mm) Height: 14.00 in. (355.89 mm) Depth: 24.00 in. (610.11 mm)

plastic inserts; cabinet is aluminum with textured epoxy paint.

Rackmount

HFS 9003 Service Manual

1–7

Specifications

Warranted Characteristics

Warranted characteristics are described in terms of quantifiable performance limits which are warranted. Names of characteristics that appear in boldface type have checks for verifying the specifications in the Check Procedures section.

T able 1–16: Warranted Characteristics — HFS 9PG1 Output Performance

Name Description High level accuracy (amplitude

≥ 1 V or high level ≥ 0 V)

±2% of level, ±50 mV

Low level accuracy (amplitude ≥ 1 V or high level ≥ 0 V)

Transition time 20% to 80% (amplitude ≤ 1V)

If amplitude < 1 V and high level < 0 V, accuracy typically meets the specification but is not guaranteed

±2% of high level, ±2% of amplitude, ±50 mV

≤ 200ps

T able 1–17: Warranted Characteristics — HFS 9PG2 Output Performance

Name Description High level accuracy ±2% of level, ±50 mV

Low level accuracy ±2% of high level, ±2% of amplitude, ±50 mV Transition time accuracy 20%

to 80% (amplitude ≤ 1V)

±10% of setting, ±300 ps

T able 1–18: Warranted Characteristics — HFS 9DG1 Output Performance

Name Description High level accuracy (amplitude

≥ 0.5 V)

±2% of level, ±50 mV

1–8

Low level accuracy (amplitude

≥ 0.5 V) Transition time 20% to 80%

(amplitude ≤ 1V)

If amplitude < 0.5 V , accuracy typically meets the specification but is not guaranteed

±2% of high level, ±2% of amplitude, ±50 mV

≤ 250ps

HFS 9003 Service Manual

Specifications

T able 1–19: Warranted Characteristics — HFS 9DG2 Output Performance

Name Description High level accuracy (amplitude

≥ 0.5 V)

±2% of level, ±50 mV

Low level accuracy (amplitude

≥ 0.5 V) Transition time accuracy 20%

±2% of high level, ±2% of amplitude, ±50 mV

±10% of setting, ±300 ps

to 80% (amplitude ≤ 1V)

If amplitude < 0.5 V , accuracy typically meets the specification but is not guaranteed.

T able 1–20: Warranted Characteristics — Time Base

Name Description Frequency accuracy ±1%

T able 1–21: Warranted Characteristic — Performance to External Frequency Reference

Name Description PHASE LOCK IN frequency

range

6 MHz to 630 MHz

HFS 9003 Service Manual

T able 1–22: Warranted Characteristics — Output Edge Placement Performance

Name Description Delay of pulses relative to time

zero reference (Lead Delay) accuracy

Pulse width accuracy HFS 9PG1: 1% of width ±300 ps

Measured at 50% levels, each channel independent.

HFS 9PG1, HFS 9PG2: 1% of (Lead Delay + Chan Delay)

±300 ps HFS 9DG1, HFS 9DG2: 1% of (Lead Delay + Chan Delay) ±50 ps

HFS 9PG2: 1% of width ±300 ps [for widths  20 ns]; 1% of width300 ps, –500 ps [for widths  20 ns] HFS 9DG1: 1% of width 50 –75 ps HFS 9DG2: 1% of width50 ps, –250 ps [for widths

 20 ns]; 1% of width50 ps, –450 ps [for widths  20 ns]

1–9

Specifications

T able 1–23: Warranted Characteristics — Trigger Out Performance

Name Description TRIGGER OUT signal levels Amplitude ≥ 300 mV (–0.5 V ≥ offset ≥ –1.5 V, driving 50 

to ground)

T able 1–24: Warranted Characteristics — Power Requirements

Name Description

Primary circuit dielectric breakdown voltage

Primary Grounding 0.1  maximum from chassis ground and protective earth

1500 VAC

ground

, 60 Hz for 10 seconds without breakdown

RMS

T able 1–25: Warranted Characteristics — Environmental and Safety

Name HFS 9003 Description HFS 9009 Description

Temperature Operating: 0_ C to +50_ C

(32_ F to 122_ F) Non-operating (storage): –40_ C to +75_ C (–40_ F to 167_ F)

Altitude Operating: 4 hours at 3,048 m (10,000 feet). Derate

maximum operating temperature by –1_ C (–1.8_ F) for each 304.8 m (1,000 feet) above 1,524 m (5,000 feet) Non-operating: 2 hours at 12,192 m (40,000 feet)

Humidity Operating: 95% RH, non-condensing, from 0_ C to

30_ C (32_ F to 86_ F) 75% RH, non-condensing, from 31_ C to 40_ C (88_ F to 104_ F)

(MIL-T-28800E, para 4.5.5.1.2.2, Type III, Class 5) Shock (non-operating) MIL-T-28800E, para 4.5.5.4.1, Type III, Class 5 Resistance to mishandling during

bench use (operating) Resistance to packaged trans-

portation vibration, sinusoidal, in shipping package

Resistance to packaged transportation vibration, sinusoidal, in shipping package

Resistance to packaged transportation random vibration

MIL-T-28800E, para 4.5.5.4.3, Type III, Class 5

Drops of 36 inches on all edges, faces, and corners

National Safe Transit Association, test procedure 1A-B-2

Packaged sinusoidal vibration

National Safe Transit Association, test procedure 1A-B-1

MIL-STD-810D, method 514.3, category I, Figure 514.3-1

Operating: 0_ C to +40_ C (32_ F to 104_ F) Non-operating (storage): –40_ C to +75_ C (–40_ F to 167_ F)

1–10

HFS 9003 Service Manual

Typical Characteristics

Specifications

T able 1–25: Warranted Characteristics — Environmental and Safety (Cont.)

Name HFS 9009 DescriptionHFS 9003 Description

Safety Listed to UL1244

Certified to CAN/CSA-C22.2 No. 231–M89

IEC Specifications Installation Category II

Pollution Degree 2 Safety Class I

Typical characteristics are described in terms of typical or average performance. Typical characteristics are not warranted.

T able 1–26: Typical Characteristics — Time Base

Name Description

RMS jitter 15 ps, ±0.05% of interval Recovery time between bursts or

auto-bursts

15 ms

T able 1–27: Typical Characteristics — HFS 9PG1 Output Performance

Name Description

Transition time 20% to 80% Amplitude ≤ 1 V: 150 ps

1 V < Amplitude ≤ 2 V: 190 ps 2 V < Amplitude ≤ 3 V: 225 ps

Output aberrations (beginning 200 ps after 50% point of transition)

Overshoot: +15%, +20 mV Undershoot: –10%, –20 mV

HFS 9003 Service Manual

1–11

Specifications

T able 1–28: Typical Characteristics — HFS 9PG2 Output Performance

Name Description

Operation when terminated to high impedance loads

Output level range will double until certain internal limits are

achieved. Since the programmed, specified, and displayed

output levels do not match the actual output levels, level

accuracy specifications do not apply when terminating to a

high impedance load. Because of the larger voltage swings

associated with doubled level range, output transition time

specifications do not apply when driving a high impedance

load. Transition time accuracy 20% to

80% Output aberrations Overshoot: +15%, +20 mV

±10% of setting, ±300 ps

Undershoot: –10%, –20 mV

T able 1–29: Typical Characteristics — HFS 9DG1 Output Performance

Name Description

Transition time 20% to 80% Amplitude ≤ 1V: ≤ 250 ps, 250 ps

1 V < Amplitude < 2 V: 250 ps

2V ≤ Amplitude ≤ 3 V: 260ps Output aberrations Overshoot: +15%, +20 mV

Undershoot: –10%, –20 mV

T able 1–30: Typical Characteristics — HFS 9DG2 Output Performance

Name Description

Operation when terminated to high impedance loads

Output level range will double until certain internal limits are

achieved. Since the programmed, specified, and displayed

output levels do not match the actual output levels, level

accuracy specifications do not apply when terminating to a

high impedance load. Because of the larger voltage swings

associated with doubled level range, output transition time

specifications do not apply when driving a high impedance

load.

1–12

Transition time accuracy 20% to 80%

Output aberrations Overshoot: +15%, +20 mV

±10% of setting, ±300 ps

Undershoot: –10%, –20 mV

HFS 9003 Service Manual

Specifications

T able 1–31: Typical Characteristics — Performance to External Frequency Reference

Name Description PHASE LOCK IN amplitude

range

0.8 V to 1.0 V peak-to-peak

PHASE LOCK IN transition time requirement

FRAME SYNC IN signal level –1.810V ≤ V

Setup time, rising edge of FRAME SYNC IN signal to rising edge of PHASE LOCK IN

Hold time, high level of FRAME

SYNC IN after rising edge of PHASE LOCK IN

Time from frame sync qualified phase lock clock cycle to timezero reference

20% to 80% in ≤ 10 ns

≤ –1.475 V –1.165 V ≤ V (standard 100 K ECL levels)

650 ps minimum

70 ns minimum, 130 ns

low

≤ –0.810 V

high

T able 1–32: Typical Characteristics — Transducer In Performance

Name Description TRANSDUCER IN useful fre-

quency range TRANSDUCER IN amplitude

requirement

HFS 9PG1: 25 MHz to > 1 GHz HFS 9PG2: 5 MHz to 300 MHz

1.0 V to 1.5 V peak-to-peak

HFS 9003 Service Manual

T able 1–33: Typical Characteristics — Trigger In Performance

Name Description

Input resistance 50  Trigger level accuracy ±100 mV ±5% of trigger level Trigger input rise/fall time re-

quirement Minimum trigger input pulse

width Trigger sensitivity ≤ 500 mV Time from trigger in to time-zero

reference

≤ 10 ns

1ns

70 ns minimum, 130 ns typical

1–13

Specifications

T able 1–34: Typical Characteristics — Trigger Out Performance

Name Description

Pretrigger resolution 250 ps

T able 1–35: Typical Characteristics — Power Requirements

Name HFS 9003 Description HFS 9009 Description

Line Voltage 90VAC

or 180 VAC 250 VAC switched automatically

Line frequency 48 Hz to 63 Hz

to 130 VAC

RMS

, range

RMS

90 VAC

RMS

with maximum 7 cards installed, 104 VAC 132 VAC 9 cards installed, or 180 VAC 250 VAC switched automatically

to 104 VAC

RMS

with maximum

RMS

, range

RMS

Power consumption 540 W maximum 1190 W with maximum of 9

cards installed

Inrush surge current 50 A maximum up to 40 ms at 110 VAC

100 A maximum up to 40 ms at 220 VAC

1–14

HFS 9003 Service Manual

Operating Information

The HFS 9003 is built in a portable C-size VXIbus card-modular mainframe (see Figure 2–1). It has a CPU card, a time base card, and up to three pulse or data generator cards. A front panel module provides a keyboard and a gas-discharge flat-panel display.

Figure 2–1: HFS 9003 Mainframe and Front Panel

This section shows how to input simple settings for basic operation. For a more thorough explanation of how to set up the instrument, refer to the HFS 9000 Series User Manual.

Menu Selections

The front panel MAIN MENU button, shown in Figure 2–2, displays the top level menu. Each item in this menu leads to a second-level menu. You can move through all menus using the arrow keys surrounding the SELECT button. Each arrow button moves the selection to the next menu item in the direction indicated. When the desired menu item is highlighted, press the SELECT button to activate that selection.

HFS 9003 Service Manual

2–1

Operating Information

Resetting the HFS 9003

MAIN MENU ButtonSELECT and

Arrow Buttons

Figure 2–2: MAIN MENU, SELECT, and Arrow Button Locations

To reset all user-selected parameters to known default settings:

1. Press the MAIN MENU button (see Figure 2–2).

2. Use the arrow buttons to highlight the Save/Recall Menu item in the main menu (see Figures 2–2 and 2–3). Press the SELECT button.

Figure 2–3: Main Menu Display

3. Highlight the Reset item and press SELECT again.

4. Verify the reset selection by highlighting the Yes in the subsequent dialog

box, then press SELECT. (To select options in the dialog box, use the up and down arrow keys, or turn the knob.)

2–2

HFS 9003 Service Manual

Setting the Time Base

Operating Information

All pulse or data generator channels are governed by a single time base. The following steps set up the time base to self-trigger repeatedly and to specify the number of pulses to be output from the pulse or data generators.

1. Press the MAIN MENU button.

2. Highlight the Time Base Menu item in the main menu. Press the SELECT

button. The time base normally waits for a trigger event, and then specifies the

number of pulses (Count) to be generated (see Figure 2–4). After that, the time base pauses for a rearm time, and then waits for the next trigger event. The display screen above the Time Base menu graphically depicts this sequence.

Figure 2–4: The Time Base Menu

3. Use the arrow keys to highlight the Mode item. Press the SELECT button twice to select Auto-Burst in the menu item (see Figure 2–5).

Figure 2–5: Mode set to Auto-Burst

The Period and Count settings control the generated pulses. When either of these items are highlighted, the waveform display above the menu is updated to illustrate the parameter being adjusted.

HFS 9003 Service Manual

2–3

Operating Information

4. Select the Period item. Use the knob to adjust the period. To get finer resolution, press the FINE button. The FINE light illuminates to indicate fine mode is selected.

You may also enter numeric values with the keypad. Type in the number and, if necessary, press a key to specify units. Then finish by pressing the

ENTER key.

5. Select the Count item. Set a value using the knob, or type a value using the

keypad. Press ENTER to terminate keypad entry. The Period item can also be used to specify Frequency. When Period is

highlighted, the SELECT button alternates between Period and Frequency. Use the knob or keypad to set values.

6. Highlight the Period item and press the SELECT button. Observe that the period setting changes to a reciprocal frequency setting.

The HFS 9003 is now set up to enable the output of pulses. Since the HFS 9003 is in auto-burst mode, no trigger input is required to generate pulses.

The RUN/STOP Button

The UNDO Button

Pulse Output

You can start and stop the time base by pressing the RUN/STOP button on the front panel.

Whenever a setting is changed, the HFS 9003 remembers the old setting as well. Pressing the UNDO button (located to the right of the display panel) restores the last setting. Pressing it twice undoes the undo.

The following procedure demonstrates how to switch the pulse generator channels on. Any channel can be turned on from the Pulse menu Output item, but it is more convenient to turn on a channel from the front panel. Depending on the configuration of the HFS 9003, there are one, two, or three pulse or data generator cards, each with up to four channels. The controls for each type of card are shown in Figure 2–6.

1. Select a channel to use for the output by pressing the OUTPUT button for that channel. Observe that the associated light illuminates. If you want to use

OUTPUT

separately.

for any generator channel, you must turn on the OUTPUT

2–4

HFS 9003 Service Manual

Operating Information

The HFS 9003 is now creating pulse bursts. It generates the number of pulses entered for the count value at the frequency entered for the corresponding period value (or frequency value). When the pulse train is completed, it automatically starts over again after the rearm time.

2. Connect a cable to the output to access the generated pulses.

3. To achieve normal burst mode operation, highlight the Mode item of the

Time Base menu. Use the SELECT button to select Burst mode. If burst is selected, the output is no longer triggered (unless a suitable trigger signal is applied to the time base card TRIGGER IN connector). Press the MANU- AL TRIGGER button (to the right of the display panel) to initiate a single burst from the HFS 9003.

SMA Connector OUTPUT ButtonLight

Figure 2–6: Controls and Connectors for the Pulse, Data Time Generator, and Time Base Cards

HFS 9DG1 HFS 9DG2HFS 9PG2TIME BASE

HFS 9003 Service Manual

2–5

Operating Information

2–6

HFS 9003 Service Manual

Strap Settings

The only strap or jumper settings in the HFS 9003 are on the backplane. Figure 3–1 shows the proper setting of these jumpers.

HFS 9003 Service Manual

3–1

Strap Settings

J12

(to Power

Supply Fan)

Power Fail

Remote

Control

GND

(For –5.2 V

5 Places)

GND

(For +24 V)

–5.2 V

(5 Places)

+24 V GND

–2 V NC

(For –12 V)

GND

(For –2 V)

–12 V

+5 V

(5 Places)

+12 V GND

(For +12 V)

J14

(Connect Jumper

as Shown)

GND (For +5 V 5 Places)

Figure 3–1: Backplane Jumper Settings and Connections

J13 NC

J11

Mainframe

J10

Fans

To Batch Control

J1 to On/Standby Switch

3–2

HFS 9003 Service Manual

Module Descriptions

This section describes the operation of each of the replaceable modules in the HFS 9003 Stimulus System. Refer to the Diagrams section of this manual for a block diagram of the HFS 9003.

Mainframe

The mainframe consists of a backplane, two power supplies, and three fans.

Backplane

Power Supplies

The backplane complies with the VXIbus System Specification Rev.1.2, dated June 21, 1989. The backplane has five slots and is VXIbus standard C size.

Two interconnected power supply modules are used to provide all the voltages for the HFS 9003. The power supply mounted closest to the front of the instrument provides –5.2 VDC, –2 VDC, and +24 VDC. The power supply mounted closest to the rear provides +5 VDC, +12 VDC, and –12 VDC.

The power supply modules feature automatic line voltage switching and remote switching for the ON/STANDBY switch (located on the front panel). The power supplies are serviced as modules; no description of module circuitry is provided.

The ON/STANDBY switch is an SPDT latching switch with a replaceable built-in lamp. It is connected to the power supply modules REMOTE CON- TROL inputs, allowing low voltage, low current switching control.

When the ON/STANDBY switch is turned on, the power supply modules REMOTE CONTROL line is released from ground, turning on the power supplies. Simultaneously, the ~ACFAIL signal is also released from ground. As the +5 V rises, ~SYS RESET is forced low for at least 200 ms, resetting all the VXIbus cards.

When the ON/STANDBY switch is turned to standby, the ~ACFAIL signal is immediately forced low. Approximately 10 ms later, ~SYS RESET is driven low. The REMOTE CONTROL lines go low approximately 30 ms after the power switch is turned to standby, shutting down the power supply modules.

HFS 9003 Service Manual

If either power supply module detects an AC line interruption, it pulls the POWER FAIL signal low, which immediately forces ~ACFAIL low. However, the other power supply module may continue to operate if it does not detect the same AC line interruption.

3–3

Module Descriptions

Fans

Front Panel Module

Cards

Three fans provide cooling for the power supply modules and the VXIbus modules installed in the card cage. The two forward fans cool the card cage and run at temperature-controlled variable speed. The single fan in the rear of the chassis cools the power supply modules and also runs at a temperature-controlled rate.

The temperature sensor for the fans is located on the left edge of the backplane and monitors the exhaust air temperature. An op amp circuit connected between the temperature sensor and the fan drivers acts as a low pass filter to prevent rapid changes in fan speeds.

All fans draw their power from the +12 V power supply, and draw a total of approximately 1.5 Amps.

The front panel module contains a scan push-button matrix and LEDs, and mechanically supports the electroluminescent display.

CPU Card

Time Base Card

Four types of cards plug into the mainframe: the CPU card, the time base card, the pulse generator cards, and the data time generator cards. Each HFS 9003 has one CPU card, one time base card, and a maximum of three pulse or data generator cards.

The CPU receives commands for pulse output parameters from the front panel, the GPIB, or RS-232 interfaces. The CPU creates a series of time base and pulse card commands which are then transmitted via the VXI Bus to set up the pulse outputs.

The CPU card contains all product code in read-only memory (ROM). The CPU card also has volatile and nonvolatile random-access memory (RAM), as well as video display and bus timing circuitry.

The time base contains a voltage-controlled oscillator, which is tunable from 325 MHz to 650 MHz. The time base also contains the trigger in, trigger out, and phase lock circuits.

The VCO output is connected to the pulse and data generator cards through clock distribution cables. Clock distribution cables are located at the front of the cards. The time base card provides several connections for clock distribution cables, one of which is connected to each pulse or data generator card. The clock distribution cables provide a high-speed signal path for the clock, because the VXIbus backplane cannot carry signals of sufficiently high frequency.

3–4

HFS 9003 Service Manual

Module Descriptions

Pulse Generator Cards

Data Time Generator

Cards

Each pulse generator card provides two independent output channels. Each channel provides standard and logically-complemented outputs.

The pulse generator card channels divide the master clock signal into the requested frequency, and format the output signals. The pulse generator card controls the channel output levels, the channel delay, and the channel rising and falling edge time.

The pulse generator card transducer input can be used to bypass the VCO and timing generation circuits in the HFS 9003. When transducer in is enabled, a sine wave can be applied to the transducer input. You can use the channel output levels and rise and fall times to reshape the input signal.

High Speed Pulse Generator Cards (HFS 9PG1) run at a top speed of 630 MHz and have a fixed rise and fall time of 200 ps.

Variable Rate Pulse Generator Cards (HFS 9PG2) run at a top speed of 300 MHz. The rise time and fall times can be independently programmed from less than one nanosecond to five nanoseconds, which allows the user to adjust the speed of the pulse edges.

Each data time generator card provides four independent output channels. The high speed data time generator card provides standard and logically-complemented outputs. The variable rate data time generator card provides only a single output for each channel. The data time generator card channels work in the same way as the pulse generator card channels. The master clock signal is divided into the requested frequency and format output signals by controlling the output levels, channel delay, and rising and falling edge time.

HFS 9003 Service Manual

High Speed Data Time Generator Cards (HFS 9DG1) run at a top speed of 630 MHz and have a fixed rise and fall time of 200 ps.

Variable Rate Data Time Generator Cards (HFS 9DG2) run at a top speed of 300 MHz. The rise and fall times can be independently programmed from less than one nanosecond to five nanoseconds, which allows the user to adjust the speed of the pulse edges.

3–5

Module Descriptions

3–6

HFS 9003 Service Manual

Performance Verification

The following tests verify that the HFS 9000 Stimulus System achieves its specified performance.

Required Test Equipment

Refer to Table 4–1 for a list of the test equipment required to verify performance.

T able 4–1: Required Test Equipment

Item Number and Description

Minimum Requirements Example Purpose

1 Digital Volt Meter DC volt accuracy:

± 0.1% from 0.40 V to 5.5 V

2 BNC female to dual

banana plug

3 Cable, Precision

Coaxial, BNC

4 Precision Feed-

through Terminator

5 Digital Sampling

Oscilloscope

6 Sampling Head Rise time: ≤ 60 ps (10% to 90%) Tektronix SD-22, SD-24, or SD-26 Used with Tektronix Digital Sam-

7 Attenuator, 5X,

SMA

8 Cable, Coaxial,

SMA (two required)

9 Generator, Leveled

Sine Wave

— Tektronix part number

36-inch, 50 W Tektronix part number

50 W, 0.1% at DC Tektronix part number

D time accuracy: ± (0.25% + 10 ps) from 100 ps to 1 ms

Freq. Measurement accuracy: ± 0.10% from 50 kHz to 630 MHz

50 W, ≥ 12 GHz bandwidth T ektronix part number

20-inch, 50 W Tektronix part number

Capable of producing 0.8 V amplitude up to 600 MHz into 50 W

p-p

Tektronix DM 511 Output level and amplitude checks

Output level and amplitude checks

103-0090-00

Output level and amplitude checks

012-0482-00

Output level and amplitude checks

01 1-0129-00 Tektronix 11801B Digital Sampling

Oscilloscope or CSA803A Communication Signal Analyzer

015-1002-00

174-1427-00

Tektronix SG 504 Phase lock check

Trigger Output Check, Rise and fall time checks, Edge placement checks, Frequency accuracy check

pling Oscilloscope (item 5) Rise and fall time checks

Trigger Output Check, Rise and fall time checks, Edge placement check, Frequency accuracy check

HFS 9003 Service Manual

4–1

Performance Verification

T able 4–1: Required Test Equipment (Cont.)

Item Number and Description

PurposeExampleMinimum Requirements

10 BNC female to

SMA male adapter

11 Threaded SMA

female to SMA male slip-on connector

Test Record

— Tektronix part number

015-1018-00

— Tektronix part number

015-0553-00

Identify the type of cards you will be testing and photocopy the appropriate tables from pages 4–3 to 4–9. Use these tables to record the performance test results for the instrument.

Output level and amplitude checks, Phase lock check

SMA quick disconnect

4–2

HFS 9003 Service Manual

Performance Verification

OutputMa

High Level

T able 4–2: Trigger Output Level and Phase Lock Test

Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Minimum Incoming Outgoing Maximum Trigger Output Level Amplitude ≥ 300 mV (–0.5 V ≥ offset ≥ –1.5 V, driving 50  to ground)

ximum

N/A __________ __________ ≤ –0.5 V Minimum Low Level Minimum Amplitude

Phase Lock Test 1% (frequency set accuracy of generator) Output 0.8 V, 250 MHz

Channel 0.8 V, 594 MHz

250 MHz 594 MHz

≥ –1.5 V

≥ 300 mV

247.5

588.1

__________ __________ N/A __________ __________ N/A

p–p

__________ __________

252.5

599.9

HFS 9003 Service Manual

4–3

Performance Verification

T able 4–3: Test Record for HFS 9DG1 Card

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Nominal Minimum Incoming Outgoing Maximum Output High Level: ± 2% of level, ± 50 mV Low Level: ± 2% of High Level, ± 2% of amplitude (p-p), ± 50 mV

Output Complement Channel Normal

Normal Complement

Not Output Normal Channel Complement

Complement

Normal Rise Time / Fall Time ≤ 250ps for Amplitude ≤ 1V Output Normal, 1V, Tr

Channel Complement, 1 V, Tf Not Output Normal, 1V, Tf

Channel Complement, 1 V, Tr Edge Placement Pulse Delay Time 1% of (Lead Delay + Chan Delay) ±50 ps Output Normal

Channel

Not Output Normal Channel

Edge Placement Pulse Width Variance 1% of width ± 50ps Output Normal

Channel

Not Output Normal Channel

+5.0 V +2.0 V –2.5 V –1.5 V

250 ps 250 ps

100 ps 500 ps

1 ns

5 ns 10 ns 50 ns

100 ns 100 ps

500 ps

1 ns

5 ns 10 ns 50 ns

100 ns

500 ps 750 ps

1 ns

500 ps 750 ps

1 ns

+4.850

1.790 –2.680 –1.580

+4.850

1.790 –2.680 –1.580

N/A N/A

445

0.940

4.900

9.850

49.45

98.95 49

445

0.940

4.900

9.850

49.45

98.95

445 693

0.940

445 693

0.940

__________ __________ __________ __________

__________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________

__________ __________ __________ __________

__________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________

+5.150 +2.210 –2.320 –1.420

250 ps 250 ps

151 555

1.060

5.100

10.150

50.55

101.05 151

555

1.060

5.100

10.150

50.55

101.05

555 808

1.060

555 808

1.060

4–4

HFS 9003 Service Manual

T able 4–3: Test Record for HFS 9DG1 Card (Cont.)

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimumNominal Pulse Width Limits 1% of width +50 –75ps

Output Normal Channel

Not Output Normal Channel

Frequency Accuracy ± 1% Output

Channel

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

50 kHz 324 MHz 326 MHz 400 MHz 433 MHz 466 MHz 500 MHz 533 MHz 566 MHz 600 MHz 630 MHz

4.875

9.825

49.425

98.925

494.925

0.990

4.875

9.825

49.425

98.925

494.925

0.990

49.50

320.8

322.7

396.0

428.7

461.3

495.0

527.7

560.3

594.0

623.7

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________

Performance Verification

5.100

10.150

50.55

101.05

505.05

1.010

5.100

10.150

50.55

101.05

505.05

1.010

50.50

327.2

329.3

404.0

437.3

470.7

505.0

538.3

571.7

606.0

636.3

HFS 9003 Service Manual

4–5

Performance Verification

T able 4–4: Test Record for HFS 9DG2 Card

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Nominal Minimum Incoming Outgoing Maximum Output High Level: ± 2% of level, ± 50 mV Low Level: ± 2% of High Level, ± 2% of amplitude (p-p), ± 50 mV

Output Complement Channel Normal

Normal

Complement Rise Time / Fall Time ± 10% of setting ± 300 ps for Amplitude ≤ 1V Output Normal, 1V, Tr

Channel Complement, 1 V, Tf

Normal, 1 V , Tr

Complement, 1 V , Tf Edge Placement Pulse Delay Time 1% of (Lead Delay + Chan Delay) ±50 ps Output Normal

Channel

Edge Placement Pulse Width Limits (1% + 50 ps, –450 ps) for widths  20 ns (1% + 50 ps, –250 ps) for widths  20 ns Output

Channel

Frequency Accuracy ± 1% Output

Channel

+5.5 V

0.0 V –2.0 V –1.0 V

0.8 ns

0.8 ns 5 ns 5 ns

100 ps 500 ps

1 ns 5 ns

10 ns 50 ns

100 ns

5 ns

10 ns

50 ns 100 ns 500 ns

1 s

50 kHz 162 MHz 163 MHz 200 MHz

216.5 MHz 233 MHz 250 MHz

266.5 MHz 283 MHz 300 MHz

+5.340 –0.270 –2.090 –1.070

0.420

4.200

445

0.940

4.900

9.850

49.45

98.95

4.500

9.450

49.25

98.75

494.8

0.990

49.50

160.4

161.4

198.0

214.3

230.7

247.5

263.8

280.2

297.0

__________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________

+5.660 +0.270 –1.910 –0.930

1.180

5.800

151 555

1.060

5.100

10.150

50.55

101.05

5.100

10.150

50.55

101.05

505.1

1.010

50.50

163.6

164.6

202.0

218.7

235.3

252.5

269.2

285.8

303.0

4–6

HFS 9003 Service Manual

Performance Verification

T able 4–5: Test Record for HFS 9PG1 Card

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Nominal Minimum Incoming Outgoing Maximum Output High Level: ± 2% of level, ± 50 mV Low Level: ± 2% of High Level, ± 2% of amplitude (p-p), ± 50 mV

Output Complement Channel Normal

Normal Complement

Not Output Normal Channel Complement

Complement

Normal Rise Time / Fall Time ≤ 200ps for Amplitude ≤ 1V Output Normal, 1V, Tr

Channel Complement, 1 V, Tf Not Output Normal, 1V, Tf

Channel Complement, 1 V, Tr Edge Placement Pulse Delay Time 1% of (Lead Delay + Chan Delay) ±300 ps Output Normal

Channel

Not Output Normal Channel

Edge Placement Pulse Width Variance 1% of width ± 300ps Output Normal

Channel

Not Output Normal Channel

+2.6 V –0.4 V

–2 V –1 V

+2.6 V –0.4 V

–2 V –1 V

200 ps 200 ps

100 ps 500 ps

1 ns

5 ns 10 ns 50 ns

100 ns 100 ps

500 ps

1 ns

5 ns 10 ns 50 ns

100 ns

500 ps 750 ps

1 ns

500 ps 750 ps

1 ns

+2.498 –0.562 –2.090 –1.070

N/A N/A

–201 195

0.690

4.650

9.600

49.20

98.70

–201 195

0.690

4.650

9.600

49.20

98.70

195 443

0.690

195 443

0.690

__________ __________ __________ __________

__________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________

__________ __________ __________ __________

__________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________

+2.702 –0.238 –1.910 –0.930

200 ps 200 ps

401 805

1.310

5.350

10.400

50.80

101.30 401

805

1.310

5.350

10.400

50.80

101.30

805 1060

1.310

805 1058

1.310

HFS 9003 Service Manual

4–7

Performance Verification

T able 4–5: Test Record for HFS 9PG1 Card (Cont.)

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimumNominal Pulse Width Limits 1% of width ± 300 ps

Output Normal Channel

Not Output Normal Channel

Frequency Accuracy ± 1% Output

Channel

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

50 kHz 324 MHz 326 MHz 400 MHz 433 MHz 466 MHz 500 MHz 533 MHz 566 MHz 600 MHz

630 MHz

4.650

9.600

49.20

98.70

494.70

0.990

4.650

9.600

49.20

98.70

494.70

0.990

49.50

320.8

322.7

396.0

428.7

461.3

495.0

527.7

560.3

594.0

623.7

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________

5.350

10.400

50.80

101.30

505.30

1.010

5.350

10.400

50.80

101.30

505.30

1.010

50.50

327.2

329.3

404.0

437.3

470.7

505.0

538.3

571.7

606.0

636.3

4–8

HFS 9003 Service Manual

Performance Verification

T able 4–6: Test Record for HFS 9PG2 Card

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Nominal Minimum Incoming Outgoing Maximum Output High Level: ± 2% of level, ± 50 mV Low Level: ± 2% of High Level, ± 2% of amplitude (p-p), ± 50 mV

Output Complement Channel Normal

Normal Complement

Not Output Normal Channel Complement

Complement

Normal Rise Time / Fall Time ± 10% of setting ± 300 ps for Amplitude ≤ 1V Output Normal, 1V, Tr

Channel Complement, 1 V, Tf

Normal, 1 V , Tr

Complement, 1 V , Tf Not Output Normal, 1V, Tf

Channel Complement, 1 V, Tr

Normal, 1 V , Tf

Complement, 1 V , T r Edge Placement Pulse Delay Time 1% of (Lead Delay + Chan Delay) ±300 ps Output Normal

Channel

Not Output Normal Channel

+5.5 V

0 V –2 V –1 V

+5.5 V

0 V –2 V –1 V

0.8 ns

0.8 ns 5 ns 5 ns

0.8 ns

0.8 ns 5 ns 5 ns

100 ps 500 ps

1 ns 5 ns

10 ns 50 ns

100 ns 100 ps

500 ps

1 ns 5 ns

10 ns 50 ns

100 ns

+5.340 –0.270 –2.090 –1.070

0.420

4.200

0.420

4.200

–201 195

0.690

4.650

9.600

49.20

98.70

–201 195

0.690

4.650

9.600

49.20

98.70

__________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________

+5.660 +0.270 –1.910 –0.930

1.180

5.800

1.180

5.800

401 805

1.310

5.350

10.400

50.80

101.30 401

805

1.310

5.350

10.400

50.80

101.30

HFS 9003 Service Manual

4–9

Performance Verification

T able 4–6: Test Record for HFS 9PG2 Card (Cont.)

Channel: Page of Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimumNominal Edge Placement Pulse Width Limits (1% of width + 300 ps, –500 ps) for widths  20 ns

(1% of width, ± 300 ps) for widths  20 ns

Output Normal Channel

Not Output Normal Channel

Frequency Accuracy ± 1% Output Nominal = HFS Setting

Channel Output = Nominal/2

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

5 ns 10 ns 50 ns

100 ns 500 ns

1 ms

100 kHz 324 MHz 326 MHz 400 MHz 433 MHz 466 MHz 500 MHz 533 MHz 566 MHz 600 MHz

4.450

9.400

49.20

98.70

494.7

0.990

4.450

9.400

49.20

98.70

494.7

0.990

49.50

160.4

161.4

198.0

214.3

230.7

247.5

263.8

280.2

297.0

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________

__________ __________ __________ __________ __________ __________ __________ __________ __________ __________

5.350

10.400

50.80

101.30

505.3

1.010

5.350

10.400

50.80

101.30

505.3

1.010

50.50

163.6

164.6

202.0

218.7

235.3

252.5

269.2

285.8

303.0

4–10

HFS 9003 Service Manual

Verification Sequence

Performance Verification

The performance verification procedure consists of the following steps, performed in the following order:

1. Perform the HFS 9000 internal self test that follows this list of steps. If the

self test indicates problems, refer to the Maintenance section in the Service Manual to repair the instrument.

2. Perform the internal calibration on page 4–12 if the HFS 9000 has not been

recalibrated within the last six months, or if the HFS 9000 has been reconfigured with different cards or has been adjusted or repaired.

3. Follow the procedures in the Check Procedures section beginning on

page 4–13 to verify that the HFS 9000 performs to every specification.

Self Test

The HFS 9000 is equipped with self-test diagnostic routines that execute automatically when you switch the power on. You may also manually select the diagnostic routines.

Use the following procedure to manually select the diagnostic routines:

1. Press MAIN MENU and select Cal/Deskew Menu.

2. Select Self Test.

The HFS 9000 display indicates the circuits under test as it proceeds through the diagnostics. The HFS 9000 returns to normal operating mode after successfully completing the diagnostics.

If the HFS 9000 detects a failure, it suspends normal operation and displays an error code (see the Maintenance section in the Service Manual for further information). The display presents two choices:

H Press any button other than the SELECT button to show a terse description

of the failure. This additional information may assist you in isolating a failure to a module, or to determine if users can continue to operate the HFS 9000. The next diagnostic test will not begin until you press the SELECT button.

H Press the SELECT button to continue with the next diagnostic test.

HFS 9003 Service Manual

A self-test failure does not necessarily indicate that the HFS 9000 is inoperable. However, it does indicate that the instrument is out of specification and that it might not be fully operational.

4–11

Performance Verification

Calibration

The calibration procedure adjusts the instrument to its internal voltage and timing references and saves the settings in non-volatile memory.

Calibrate the HFS 9000 at least every six months. The instrument does not need more frequent calibration unless it is reconfigured or used in an ambient temperature that differs by more than 5_ C from the temperature it was last calibrated in.

NOTE. Run the calibration procedure only when the HFS 9000 has been powered on for 20 minutes in the temperature environment you expect it to be used in.

To calibrate the HFS 9000, select the Calibrate item in the Cal/Deskew menu. After you select the Calibrate item, verify this choice in the subsequent dialog

box. After verification, the HFS 9000 starts the Timebase calibration and prompts you to attach an SMA cable from the front panel SKEW CAL IN connector to the TRIGGER OUT connector. The HFS 9000 then prompts you to connect each channel OUTPUT connector in turn. The HFS 9000 performs the calibration automatically during the time that each channel is connected. The time for the calibration procedure varies by configuration.

A 20 inch, 50 W coaxial SMA cable (Tektronix part number 174-1427-00) is supplied with the HFS 9000 as a standard accessory. This cable is suitable for use during calibration.

4–12

HFS 9003 Service Manual

Check Procedures

Performance Verification

Once you have run the self-test procedure, and, if necessary, calibrated the HFS 9000, these check procedures will verify that the instrument performs as specified.

Instrument Setup

Select MAIN MENU and reset the HFS 9000 using the Reset item in the Save/Recall menu. After this reset, the parameters listed below are properly set for all tests and need not be modified again. However, each check specifies a reset as a first step to ensure the following settings:

H Cal/Deskew menu, Pretrigger item: 70 ns H Cal/Deskew menu, Channel Delay item: 0 s (all channels) H Time Base menu, Mode item: Auto H Levels menu, Limit item: Off H Pulse menu, Signal Type item: Pulse

NOTE. Allow the HFS 9000 to warm up for a minimum of 20 minutes. The instrument must warm up in an ambient temperature within 5_ C of the ambient temperature when last calibrated.

After you have set up the first channel for a particular check, use the Copy Channel and Paste Channel menu items to transfer the setup to the other

channels.

Output Level Checks

(HFS 9DG1 Card Only)

HFS 9003 Service Manual

These tests check the output level in volts DC of each data generator channel. You will need to repeat these checks for each output channel; the number of times you repeat a check depends on the configuration of your HFS 9000. A reference to “the channel” is a reference to the particular channel being checked.

Equipment Required

1. Reset the HFS 9000.

2. Set the Digital Voltmeter to measure DC volts on Auto Range.

One DVM (digital voltmeter, item 1) One BNC female to dual banana connector (item 2) One precision coaxial cable (item 3) One feedthrough termination (item 4) One threaded SMA female to SMA male slip-on connector (item 11).

4–13

Performance Verification

3. Construct the termination assembly by connecting the following items in the

order listed:

a. one BNC female to dual banana connector (item 2) b. one precision coaxial cable (item 3) c. one feedthrough termination (item 4) d. one BNC female to SMA male adapter (item 10) e. one threaded SMA female to SMA male slip-on connector (item 11).

4. Connect the banana plug end of the termination assembly to the input of the DVM and connect the other end to the channel normal OUTPUT connector.

5. Set the HFS 9000 according to Table 4–7.

T able 4–7: HFS 9DG1 Output Level Checks, First Settings

Control Setting

Pulse menu, Channel The channel under test Pulse menu, Output On Pulse menu, ~Output Off Pulse menu, Pulse Rate Off Pulse menu, Polarity Complement Pulse menu, High Level 5.0 V Pulse menu, Low Level 2.0 V

The output voltage reading on the DVM should be between 4.850 V and

5.150 V.

6. Change the Pulse menu Polarity item setting to Normal. The output voltage reading on the DVM should be between 1.790 V and

2.210 V.

7. Set the HFS 9000 according to Table 4–8.

T able 4–8: HFS 9DG1 Output Level Checks, Second Settings

4–14

Control Setting

Pulse menu, High Level –1.5 V Pulse menu, Low Level –2.5V

HFS 9003 Service Manual

Performance Verification

The output voltage reading on the DVM should be between –2.680 V and –2.320 V.

8. Change the Pulse menu Polarity item setting to Complement.

The output voltage reading on the DVM should be between –1.580 V and –1.420 V.

9. Move the feedthrough termination assembly to the channel complemented

OUTPUT

. The DVM is now set to monitor the complement output.

10. Set the HFS 9000 according to Table 4–9.

T able 4–9: HFS 9DG1 Output Level Checks, Third Settings

Control Setting

Pulse menu, Output Off Pulse menu, ~Output On Pulse menu, Polarity Normal Pulse menu, High Level 5.0 V Pulse menu, Low Level 2.0 V

The output voltage reading on the DVM should be between 4.850 V and

5.150 V.

11. Change the Pulse menu Polarity item setting to Complement.

The output voltage reading on the DVM should be between 1.790 V and

2.210 V.

12. Set the HFS 9000 according to Table 4–10.

T able 4–10: HFS 9DG1 Output Level Checks, Fourth Settings

Control Setting

Pulse menu, High Level –1.5 V Pulse menu, Low Level –2.5V

The output voltage reading on the DVM should be between –2.680 V and –2.320 V.

HFS 9003 Service Manual

13. Change the Pulse menu Polarity item setting to Normal.

The output voltage reading on the DVM should be between –1.580 V and –1.420 V.

4–15

Performance Verification

14. Repeat steps 1 through 13 for each of the HFS 9DG1 channels in the system.

15. Disconnect test setup.

Output Level Checks

(HFS 9DG2 and HFS 9PG2

Cards Only)

These tests check the output level in volts DC of each pulse or data generator channel. You will need to repeat these checks for each output channel; the number of times you repeat a check depends on the configuration of your HFS 9000. A reference to “the channel” is a reference to the particular channel being checked.

Equipment Required

1. Reset the HFS 9000.

2. Set the Digital Voltmeter to measure DC volts on Auto Range.

3. Construct the termination assembly by connecting the following items in the

order listed:

4. Connect the banana plug end of the termination assembly to the input of the DVM and connect the other end to the channel normal OUTPUT connector.

5. Set the HFS 9000 according to Table 4–11.

4–16

HFS 9003 Service Manual

Performance Verification

T able 4–11: HFS 9DG2 and HFS 9PG2 Output Level Checks, First Settings

Control Setting

Pulse menu, Channel The channel under test Pulse menu, Output On Pulse menu, ~Output Off Pulse menu, Pulse Rate Off Pulse menu, Polarity Complement Pulse menu, High Level 5.5 V Pulse menu, Low Level 0V

The output voltage reading on the DVM should be between 5.340 V and

5.660 V.

6. Change the Pulse menu Polarity item setting to Normal.

The output voltage reading on the DVM should be between –0.270 V and +0.270 V.

7. Set the HFS 9000 according to Table 4–12.

T able 4–12: HFS 9DG2 and HFS 9PG2 Output Level Checks, Second Settings

Control Setting

Pulse menu, High Level –1.0 V Pulse menu, Low Level –2.0V

The output voltage reading on the DVM should be between –2.090 V and –1.910 V.

8. Change the Pulse menu Polarity item setting to Complement.

The output voltage reading on the DVM should be between –1.070 V and –0.930 V.

9. Move the feedthrough termination assembly to the channel complemented

OUTPUT

if available (HFS 9PG2). The DVM is now set to monitor the

complement output.

HFS 9003 Service Manual

4–17

Performance Verification

10. Set the HFS 9000 according to Table 4–13.

T able 4–13: HFS 9PG2 Output Level Checks, Third Settings

Control Setting

Pulse menu, Output Off Pulse menu, ~Output On Pulse menu, Polarity Normal Pulse menu, High Level 5.5 V Pulse menu, Low Level 0 V

The output voltage reading on the DVM should be between 5.340 V and

5.660 V.

11. Change the Pulse menu Polarity item setting to Complement. The output voltage reading on the DVM should be between –0.270 V and

+0.270 V.

12. Set the HFS 9000 according to Table 4–14.

T able 4–14: HFS 9PG2 Output Level Checks, Fourth Settings

Control Setting

Pulse menu, High Level –1.0 V Pulse menu, Low Level –2.0V

The output voltage reading on the DVM should be between –2.090 V and –1.910 V.

13. Change the Pulse menu Polarity item setting to Normal. The output voltage reading on the DVM should be between –1.07 V and

–0.93 V.

14. Repeat steps 1 through 13 for each of the HFS 9PG2 and HFS 9DG2 channels in the system.

4–18

15. Disconnect test setup.

HFS 9003 Service Manual

Performance Verification

Output Level Checks

(HFS 9PG1 Card Only)

These tests check the output level in volts DC of each pulse generator channel. You will need to repeat these checks for each output channel; the number of times you repeat a check depends on the configuration of your HFS 9000. A reference to “the channel” is a reference to the particular channel being checked.

Equipment Required

1. Reset the HFS 9000.

2. Set the Digital Voltmeter to measure DC volts on Auto Range.

3. Construct the termination assembly by connecting the following items in the

order listed:

4. Connect the banana plug end of the termination assembly to the input of the DVM and connect the other end to the channel normal OUTPUT connector.

5. Set the HFS 9000 according to Table 4–15.

T able 4–15: HFS 9PG1 Output Level Checks, First Settings

Control Setting

Pulse menu, Channel The channel under test Pulse menu, Output On Pulse menu, ~Output Off Pulse menu, Pulse Rate Off Pulse menu, Polarity Complement Pulse menu, High Level 2.6 V Pulse menu, Low Level –0.4V

HFS 9003 Service Manual

4–19

Performance Verification

The output voltage reading on the DVM should be between 2.498 V and

2.702 V.

6. Change the Pulse menu Polarity item setting to Normal.

The output voltage reading on the DVM should be between –0.562 V and –0.238 V.

7. Set the HFS 9000 according to Table 4–16.

T able 4–16: HFS 9PG1 Output Level Checks, Second Settings

Control Setting

Pulse menu, High Level –1.0 V Pulse menu, Low Level –2.0V

The output voltage reading on the DVM should be between –2.090 V and –1.910 V.

8. Change the Pulse menu Polarity item setting to Complement.

The output voltage reading on the DVM should be between –1.07 V and –0.93 V.

9. Move the feedthrough termination assembly to the channel complemented

OUTPUT

. The DVM is now set to monitor the complement output.

10. Set the HFS 9000 according to Table 4–17.

T able 4–17: HFS 9PG1 Output Level Checks, Third Settings

Control Setting

Pulse menu, Output Off Pulse menu, ~Output On Pulse menu, Polarity Normal Pulse menu, High Level 2.6 V Pulse menu, Low Level –0.4 V

The output voltage reading on the DVM should be between 2.498 V and

2.702 V.

4–20

11. Change the Pulse menu Polarity item setting to Complement.

The output voltage reading on the DVM should be between –0.562 V and –0.238 V.

HFS 9003 Service Manual

Performance Verification

12. Set the HFS 9000 according to Table 4–18.

T able 4–18: HFS 9PG1 Output Level Checks, Fourth Settings

Control Setting

Pulse menu, High Level –1.0 V Pulse menu, Low Level –2.0V

The output voltage reading on the DVM should be between –2.090 V and –1.910 V.

13. Change the Pulse menu Polarity item setting to Normal. The output voltage reading on the DVM should be between –1.07 V and

–0.93 V.

14. Repeat steps 1 through 13 for each of the HFS 9PG1 channels in the system.

Trigger Output Level

15. Disconnect test setup.

This check verifies the level of the HFS 9000 trigger output.

Equipment Required

One Tektronix 11801B Digital Sampling Oscilloscope or CSA803A Communication Signal Analyzer (item 5) with sampling head (item 6)

Two SMA coaxial cables (item 8)

1. Connect an SMA cable from the HFS 9000 TRIGGER OUTPUT to the Channel 1 input of the DSO sampling head.

2. Connect an SMA cable from the DSO trigger input to the HFS 9000 Channel 1 output.

3. Reset the HFS 9000.

4. Initialize the DSO and select the Channel 1 sampling head input.

HFS 9003 Service Manual

4–21

Performance Verification

5. Press AUTOSET and set the HFS 9000 and DSO according to Table 4–19.

T able 4–19: Settings for Trigger Output Check

Control Setting

HFS 9000:

Pulse menu, Period Press SELECT to change the Period item to a

Frequency item

Pulse menu, Frequency 100MHz Pulse menu, Output On

DSO:

Main Size 2 ns Vertical Size 200 mV Vertical Offset 0 Main Position Minimum

Rise Time and Fall Time

Checks (HFS 9PG1 and

HFS 9DG1 Cards Only)

Measure Min, Max, Amplitude

6. Measure maximum value is less than or equal to –0.5 V, the minimum value

is greater than or equal to –1.5 V and the amplitude is greater than or equal to 300 mV

p-p

These checks verify the rise time and fall times of HFS 9PG1 pulse card and HFS 9DG1 data time generator channels. You will check each HFS 9000 high speed channel in turn. A reference to “the channel” is a reference to the particular channel under test.

Equipment Required

One Tektronix 11801B Digital Sampling Oscilloscope or CSA803A Communication Signal Analyzer (item 5) with sampling head (item 6)

Two SMA coaxial cables (item 8) One SMA 5X attenuator (item 7) One threaded SMA female to SMA male slip-on connector (item 11).

1. Reset the HFS 9000, then make the settings according to Table 4–20.

4–22

HFS 9003 Service Manual

Performance Verification

T able 4–20: Settings for Rise Time and Fall Time Checks

Control Setting

Pulse menu, Channel The channel under test Pulse menu, High Level Press SELECT to change the High Level item to an

Amplitude item, and the Low Level item to an Offset

item Pulse menu, Amplitude 1.0 V Pulse menu, Offset 0V Pulse menu, Polarity Normal Pulse menu, Period Press SELECT to change the Period item to a

Frequency item Pulse menu, Frequency 100 kHz Pulse menu, Pulse Rate Normal Pulse menu, Output On Pulse menu, ~Output Off

2. Initialize the DSO.

3. Connect an SMA cable from the HFS 9000 TRIGGER OUT connector to

the DIRECT connector located in the TRIGGER INPUTS section of the DSO. Set the DSO to trigger on that signal. Turn on averaging on the DSO.

CAUTION. To avoid accidentally damaging the sampling head of the DSO, place a 5X SMA attenuator on the sampling head input. Voltages in excess of 3 volts may damage the input circuit.

4. After placing a 5X SMA attenuator on the sampling head input, connect an SMA cable from the 5X SMA attenuator to the HFS 9000 normal OUTPUT connector of the channel under test. To save time connecting the cable to other channels, use the SMA slip-on connector on the end of the cable that connects to the HFS.

5. Set the DSO to display the signal with 50 mV/div (4 divisions) vertically at zero offset. Set the DSO time base to 1 s/div horizontally. Set the DSO MAIN POSITION to minimum.

HFS 9003 Service Manual

4–23

Performance Verification

6. Display the DSO measurement menu and turn on RISE and FALL measurements. Touch the RISE selector at the bottom of the DSO screen to display the RISE measurement parameters. Set these parameters according to Table 4–21.

T able 4–21: DSO Settings for Rise/Fall Time Checks

DSO Control Setting

Left Limit 0% Right Limit 100% Proximal 20% Distal 80% Tracking On Level Mode Relative

7. Once the DSO captures high and low levels, turn off tracking.

8. Set the DSO sweep speed to 500 ps/div and position the first rising edge at

center screen. The measured rise time should be less than 200 ps for HFS 9PG1 cards, and less than 250 ps for a HFS 9DG1 cards. (Use waveform averaging to stabilize the measurement.)

9. Change the Pulse menu Polarity item setting to Complement. The measured fall time should be less than 200 ps for HFS 9PG1 cards, and less than 250 ps for HFS 9DG1 cards.

10. Repeat steps 1 through 9 for each of the HFS 9PG1 or HFS 9DG1 card channels in the system. (For Not Output channels, set Output off and

~Output on.)

11. Disconnect test setup.

4–24

HFS 9003 Service Manual

Performance Verification

Rise Time and Fall Time

Checks (HFS 9PG2 and

HFS 9DG2 Cards Only)

These checks verify the rise time and fall times of HFS 9PG2 pulse card and HFS 9DG2 data time generator channels. You will check each HFS 9000 high speed channel in turn. A reference to “the channel” is a reference to the particular channel under test.

Equipment Required

One Tektronix 11801B Digital Sampling Oscilloscope or CSA803A Communication Signal Analyzer (item 5) with sampling head (item 6)

Two SMA coaxial cables (item 8) One SMA 5X attenuator (item 7) One threaded SMA female to SMA male slip-on connector (item 11).

1. Reset the HFS 9000, then make the settings listed in Table 4–22.

T able 4–22: Settings for Rise Time and Fall Time Checks

Control Setting

Pulse menu, Channel The channel under test Pulse menu, High Level Press SELECT to change the High Level item to an

Amplitude item, and the Low Level item to a Offset

item Pulse menu, Amplitude 1.0 V Pulse menu, Offset 0V Pulse menu, Polarity Normal Pulse menu, Transition 800 ps Pulse menu, Period Press SELECT to change the Period item to a

Frequency item Pulse menu, Frequency 100 kHz Pulse menu, Pulse Rate Normal Pulse menu, Output On Pulse menu, ~Output Off

2. Connect an SMA cable from the HFS 9000 TRIGGER OUT connector to the DIRECT connector located in the TRIGGER INPUTS section of the DSO. Set the DSO to trigger on that signal.

CAUTION. To avoid accidentally damaging the sampling head of the DSO, place a 5X SMA attenuator on the sampling head input. Voltages in excess of 3 volts may damage the input circuit.

HFS 9003 Service Manual

4–25

Performance Verification

3. After placing a 5X SMA attenuator on the sampling head input, connect an SMA cable from the 5X SMA attenuator to the HFS 9000 normal OUTPUT connector of the channel under test. To save time connecting the cable to other channels, use the SMA slip-on connector on the end of the cable that connects to the HFS.

4. Set the DSO to display the signal with 50 mV/div (4 divisions) vertically at zero offset. Set the DSO time base to 1 s/div horizontally. Set the DSO

MAIN POSITION to minimum.

5. Display the DSO measurement menu and turn on RISE and FALL

measurements. Touch the RISE selector at the bottom of the DSO screen to display the RISE measurement parameters. Set these parameters according to Table 4–23.

T able 4–23: DSO Settings for Rise/Fall Time Checks

DSO Control Setting

Left Limit 0% Right Limit 100% Proximal 20% Distal 80% Tracking On Level Mode Relative

6. Once the DSO captures high and low levels, turn off tracking.

7. Set the DSO sweep speed to 500 ps/div and position the first rising edge at

center screen. The measured rise time should be between 420 ps and 1.18 ns (HFS 9PG2 & HFS 9DG2 cards). (Use waveform averaging to stabilize the measurement.)

8. Change the Pulse menu Polarity item setting to Complement. The measured fall time should be between 420 ps and 1.18 ns (HFS 9PG2 & HFS 9DG2 cards).

9. Change the Pulse menu Polarity item setting to Normal. Set the Pulse menu Transition item to 5 ns.

10. Set the DSO time base to 5 ns/div. Use the RISE measurement to verify that

the rise time is between 4.2 ns and 5.8 ns (HFS 9PG2 & HFS 9DG2 cards).

4–26

11. Change the Pulse menu Polarity item setting to Complement. The measured fall time on the DSO should be between 4.2 ns and 5.8 ns (HFS 9PG2 & HFS 9DG2 cards).

HFS 9003 Service Manual

Performance Verification

12. Repeat steps 1 through 11 for each of the HFS 9PG2 or HFS 9DG2 card channels in the system. (For Not Output channels, set Output off and

~Output on.)

13. Disconnect test setup.

Edge Placement Checks

These checks verify the accuracy of the pulse delays and pulse widths. You will check each HFS 9000 channel in turn. A reference to “the channel” is a reference to the particular channel being checked in this repetition.

Equipment Required

One Tektronix 11801B Digital Sampling Oscilloscope or CSA803A Communication Signal Analyzer (item 5) with sampling head (item 6)

Two SMA coaxial cables (item 8) One threaded SMA female to SMA male slip-on connector (item 11).

1. Reset the HFS 9000, then make the settings according to Table 4–24.

T able 4–24: Settings for Edge Placement Checks

Control Setting

Pulse menu, Channel The channel under test Pulse menu, High Level Press SELECT to change the High Level item to an

Amplitude item, and the Low Level item to an Offset

item Pulse menu, Amplitude 1.0 V Pulse menu, Offset 0V

HFS 9003 Service Manual

Pulse menu, Period Press SELECT to change the Period item to a

Frequency item

Pulse menu, Frequency 100 kHz Pulse menu, Output On

2. If the channel is a Variable Rate (HFS 9PG2 or HFS 9DG2) channel, set

transition to the lowest (fastest) rise time possible. (A quick way to do this is to enter “0” on the numeric keypad.)

3. Connect an SMA cable from the HFS 9000 TRIGGER OUT connector to the DIRECT connector located in the TRIGGER INPUTS section of the DSO.

4. Connect an SMA cable from the normal OUTPUT connector of the HFS 9000 channel under test to the sampling head input of the DSO. To save

4–27

Performance Verification

time connecting the cable to other channels, use the SMA slip-on connector on the end of the cable that connects to the HFS.

5. Initialize the DSO, then set the DSO to display a triggered signal with

200 mV/div (5 divisions) vertically at zero offset. Set the DSO time base to 1 s/div horizontally. Set the DSO MAIN POSITION to minimum.

6. Display the DSO measurement menu and turn on WIDTH and CROSS measurements. On the DSO, touch the WIDTH selector at the bottom of the DSO screen to display the width measurement parameters. Set the DSO width LEVEL MODE parameter to RELATIVE. Turn the DSO tracking on.

7. On the DSO, turn tracking off when the high and low levels have been acquired.

8. Set the DSO sweep speed to 500 ps/div. Position the rising edge of the displayed waveform at the center of the DSO screen. On the DSO, save the cross measurement as the reference (in the Compare & References pop-up menu).

9. On the DSO, turn COMPARE on.

10. Refer to Table 4–25 or 4–26, as appropriate, and adjust for each of the specified Pulse menu Lead Delay settings listed in the left column. For each Lead Delay value, verify that the DSO CROSS measurement falls within the

limits specified in the middle and right columns. You may need to adjust the DSO horizontal position to keep the rising edge on the screen.

T able 4–25: Lead Delay Limits for HFS 9PG1 and HFS 9PG2

HFS 9000 Pulse Menu Lead Delay Setting

100 ps –201 ps 401 ps 500 ps 195 ps 805 ps 1ns 690 ps 1.31ns 5ns 4.65 ns 5.35ns 10 ns 9.60 ns 10.4ns 50 ns 49.2 ns 50.8ns 100 ns 98.7 ns 101.3ns

DSO CROSS Measurement Minimum

DSO CROSS Measurement Maximum

4–28

HFS 9003 Service Manual

Performance Verification

T able 4–26: Lead Delay Limits for HFS 9DG1 and HFS 9DG2

HFS 9000 Pulse Menu Lead Delay Setting

100 ps 49 ps 151 ps 500 ps 445 ps 555 ps 1ns 940 ps 1.060ns 5ns 4.9 ns 5.1 ns 10 ns 9.85 ns 10.15ns 50 ns 49.45 ns 50.55 ns 100 ns 98.95 ns 101.05 ns

DSO CROSS Measurement Minimum

DSO CROSS Measurement Maximum

11. Set the DSO horizontal position to minimum. Turn the DSO COMPARE off.

12. On the HFS 9000, use the SELECT button to change the Pulse menu Duty Cycle item to a Width item. Set the Lead Delay item to zero.

13. Skip this step if the channel is a Variable Rate (HFS 9PG2 or HFS 9DG2)

channel. Refer to Table 4–27 or Table 4–28. Adjust the DSO horizontal position to display the first rising edge at screen. While observing the width measurement readout on the DSO, adjust the HFS 9000 Pulse Width item with the knob in Fine mode until each reading in the left column is achieved on the DSO. Then, observe the Width item setting on the HFS 9000 that achieved this result. Verify that the HFS 9000 value is within the limits specified in the middle and right columns. You may need to adjust the DSO horizontal position to keep the pulse on the screen.

HFS 9003 Service Manual

T able 4–27: Width Variance Limits for HFS 9PG1

DSO WIDTH Measurement Readout

500 ps 195 ps 805 ps 750 ps 443 ps 1.06 ns 1ns 690 ps 1.31ns

HFS 9000 Width Setting Minimum

HFS 9000 Width Setting Maximum

4–29

Performance Verification

Pulse Menu

DSO WIDT

T able 4–28: Width Variance Limits for HFS 9DG1

DSO WIDTH Measurement Readout

650 ps 594 ps 732 ps 750 ps 693 ps 833 ps 1ns 940 ps 1.085ns

HFS 9000 Width Setting Minimum

HFS 9000 Width Setting Maximum

14. Refer to Tables 4–29, 4–30 and 4–31, as appropriate, and set each of the specified Pulse menu Width settings listed in the left column. For each Width setting, verify that the DSO WIDTH measurement falls within the limits specified in the middle and right columns. Adjust the horizontal time/division as necessary to keep a full pulse displayed on screen.

T able 4–29: Width Limits for HFS 9PG1 and HFS 9PG2

DSO WIDTH

HFS9000 Width Setting

5ns 4.65 ns 4.45 ns 5.35ns 10 ns 9.60 ns 9.40 ns 10.4ns

Measurement Minimum HFS 9PG1 HFS 9PG2

Measurement Maximum

50 ns 49.2 ns 49.2 ns 50.8 ns 100 ns 98.7 ns 98.7ns 101.3ns 500 ns 494.7 ns 494.7 ns 505.3 ns 1 ms 990 ns 990 ns 1.01 ms

T able 4–30: Width Limits for HFS 9DG1

HFS 9000 Pulse Menu Width Setting

5ns 4.875 ns 5.1 ns 10 ns 9.825 ns 10.15 ns 50 ns 49.45 ns 50.55 ns 100 ns 98.95 ns 101.05 ns 500 ns 494.95 ns 505.05 ns 1 ms 990 ns 1.01 ms

DSO WIDTH Measurement Minimum

DSO WIDTH Measurement Maximum

4–30

HFS 9003 Service Manual

T able 4–31: Width Limits for HFS 9DG2 1

Performance Verification

Frequency Accuracy

Check

HFS 9000 Pulse Menu Width Setting

5ns 4.500 ns 5.1 ns 10 ns 9.450 ns 10.15 ns 50 ns 49.25 ns 50.55 ns 100 ns 98.75 ns 101.05 ns 500 ns 494.8 ns 505.1 ns 1 ms 990 ns 1.01 ms

DSO WIDTH Measurement Minimum

DSO WIDTH Measurement Maximum

15. Repeat steps 1 through 14 for each of the channels in the system. (For Not Output channels, set Output off and ~Output on).

16. Disconnect test setup.

Equipment Required

One Tektronix 11801B Digital Sampling Oscilloscope or CSA803A Communication Signal Analyzer (item 5) with sampling head (item 6)

One SMA coaxial cable (item 8) One threaded SMA female to SMA male slip-on connector (item 11).

1. Reset the HFS 9000, then use the SELECT button to change the Pulse menu Period item to a Frequency item.

2. Connect an SMA cable from the HFS 9000 TRIGGER OUT connector to the

DIRECT connector located in the TRIGGER INPUTS section of the DSO. Set the DSO to trigger on that signal.

3. Connect an SMA cable from the normal OUTPUT connector of any High Speed HFS 9000 channel to the sampling head input of the DSO. To save time connecting the cable to other channels, use the SMA slip-on connector on the end of the cable that connects to the HFS.

NOTE. If you have any HFS 9PG2 channels, set the Pulse menu Pulse Rate item to Half for those channels. If you have Variable Rate or HFS 9DG2 channels, use one of them for this test.

4. Turn on the output of the HFS 9000 channel you are using.

HFS 9003 Service Manual

4–31

Performance Verification

5. Set the DSO to display the signal with 200 mV/div vertically and a vertical

offset of –1.3 V. Set the DSO time base to 500 ps/div horizontally. Set the DSO MAIN POSITION to minimum.

6. Display the DSO measurement menu and turn on the FREQUENCY

measurement. On the DSO, turn TRACKING on and turn on AVERAGING with AVGN set to 32.

7. Refer to Tables 4–32, 4–33, or 4–34 as appropriate, and adjust for each of the specified Pulse menu Frequency settings listed in the left column. For each Frequency value, verify that the DSO FREQUENCY measurement falls within the limits specified in the middle and right columns. Adjust the horizontal size and position to make the display of a single cycle fill the DSO screen.

T able 4–32: Frequency Limits (HFS 9PG1 & HFS 9DG1)

HFS 9000 Pulse Menu Frequency Setting

50 kHz 49.5 kHz 50.5 kHz 324 MHz 320.8MHz 327.2 MHz 326 MHz 322.7MHz 329.3 MHz 400 MHz 396.0MHz 404.0 MHz 433 MHz 428.7MHz 437.3 MHz 466 MHz 461.3MHz 470.7 MHz 500 MHz 495.0MHz 505.0 MHz 533 MHz 527.7MHz 538.3 MHz 566 MHz 560.3MHz 571.7 MHz 600 MHz 594.0MHz 606.0 MHz 630 MHz 623.7MHz 636.3 MHz

DSO FREQUENCY Minimum

DSO FREQUENCY Maximum

T able 4–33: Frequency Limits (HFS 9PG2)

HFS 9000 Pulse Menu Frequency Setting

100 kHz 49.5 kHz 50.5 kHz

DSO FREQUENCY ( 2) Minimum

DSO FREQUENCY ( 2) Maximum

4–32

324 MHz 160.4MHz 163.6 MHz 326 MHz 161.4MHz 164.6 MHz 400 MHz 198MHz 202MHz 433 MHz 214.3MHz 218.7 MHz

HFS 9003 Service Manual

T able 4–33: Frequency Limits (HFS 9PG2) (Cont.)

Performance Verification

HFS 9000 Pulse Menu Frequency Setting

466 MHz 230.7MHz 235.3 MHz 500 MHz 247.5MHz 252.5 MHz 533 MHz 263.8MHz 269.2 MHz 566 MHz 280.2MHz 285.8 MHz 600 MHz 297.0MHz 303.0 MHz

DSO FREQUENCY ( 2) Minimum

DSO FREQUENCY ( 2) Maximum

T able 4–34: Frequency Limits (HFS 9DG2)

HFS 9000 Pulse Menu Frequency Setting

50 kHz 49.5 kHz 50.5 kHz 162 MHz 160.4 MHz 163.6MHz 163 MHz 161.4 MHz 164.6MHz 200 MHz 198.0MHz 202.0 MHz

216.5 MHz 214.3 MHz 218.7 MHz 233 MHz 230.7MHz 235.3 MHz

DSO FREQUENCY Minimum

DSO FREQUENCY Maximum

250 MHz 247.5MHz 252.5 MHz

266.5 MHz 263.8 MHz 269.2 MHz 283 MHz 280.2MHz 285.8 MHz 300 MHz 297.0MHz 303.0 MHz

HFS 9003 Service Manual

4–33

Performance Verification

Phase Lock Check

Equipment Required

Generator, Leveled Sine Wave (item 9) BNC female to SMA male adapter (item 10).

This check verifies that the phase lock system is capable of detecting, accurately measuring, and holding an input signal.

NOTE. If the HFS 9003 cannot determine the phase lock frequency, an error message is displayed. This will happen if the phase lock signal is not stable and continuous, or if the phase lock signal is outside the allowed frequency range, or if the HFS 9003 needs calibrating.

1. Reset the HFS 9000.

2. Set the signal generator for an amplitude of 0.8 V

and a frequency of

p-p

250 MHz. Connect the signal to the HFS 9000 PHASE LOCK IN connector. If your generator does not have better than 1% frequency accuracy, use the FREQUENCY measurement capability of the DSO to set the generator frequency to within 1%.

3. Set the Time Base menu PhaseLockIn item to On.

4. Check that the input frequency is correctly displayed on the HFS 9000

screen immediately above the menu area.

5. Wait at least five seconds and make sure that the HFS 9000 retains phase lock. (If phase lock is lost, you will see an error message.)

6. Set the Time Base menu PhaseLockIn item to Off.

7. Repeat steps 3 through 6 with the signal generator set to 594 MHz. If your

generator does not have better than 1% frequency accuracy, use the FREQUENCY measurement capability of the DSO to set the generator frequency to within 1%.

8. You may optionally check other frequencies as well. Low frequency checks will require a different generator (such as a square wave generator) which meets to 20% to 80% risetime requirement of 10 ns or less for the PHASE

LOCK IN input.

9. Disconnect test setup.

4–34

HFS 9003 Service Manual

Adjustment Procedures

The only adjustments that can be made to the HFS 9003 are to the power supply outputs. No other circuitry in the instrument requires or has adjustments.

The power supply voltages are measured and adjusted under no-load conditions. Adjustments should be made only if the output voltages are out of tolerance. If a supply cannot be adjusted to within tolerance, the module must be replaced.

Required Test Equipment

You will need a digital voltmeter (DVM) with 0.3% accuracy ranging from 2 VDC to 24 VDC.

Disassembly for Adjustment

See the removal procedure for the power supplies on page 6–5.

WARNING. To avoid electric shock, disconnect the power source when removing or replacing the covers. Hazardous voltages are exposed when the covers are removed, even when the power switch is in the STANDBY position. Use extreme caution when the instrument is connected to a power source while the covers are removed.

Adjustment

HFS 9003 Service Manual

Only make adjustments to supply voltages that measure outside the range in Table 5–1 under no-load conditions. Voltage measurements can be read from the spade connectors located on the back of the backplane or from the spade connectors on the supplies themselves. Refer to Figures 5–1 and 5–2 for the voltage assignments.

The voltage levels are adjusted with the potentiometers located near the edge of the power supply modules. On the supply closest to the rear, the three potentiometers from top to bottom set the +5 V, +12 V, and –12 V levels respectively. For the supply closest to the front of the instrument, the potentiometers from top to bottom set +24 V, –2 V, and –5.2 V respectively.

5–1

Adjustment Procedures

T able 5–1: Power Supply Tolerances

Nominal Voltage Supply Module Acceptable Range

+5 V Rear 4.875 V to 5.25 V +12 V Rear 11.54 V to 12.60 V –12 V Rear –11.64 V to –12.60 V –2 V Front –1.9 V to –2.1 V –5.2 V Front –5.044 V to –5.46 V +24 V Front 23.28 V to 25.20 V







–12V









V2 +12V







V1 +5V



Figure 5–1: Rear Power Supply Voltage and Adjustment Locations

Backplane Connections

V4 +24V

V2 –2V

V1 –5.2V























Backplane Connections

–12 V GND +12 V GND –12 V

+12 V Power Fail

+5 V GND

+5 V

+24 V +24 V GND –2 V GND

–2 V Power Fail

–5.2 V GND

–5.2 V

5–2

Figure 5–2: Front Power Supply Voltage and Adjustment Locations

HFS 9003 Service Manual

Preventive Maintenance

Accumulations of dirt impair the efficiency of the cooling fans and reduce heat transfer from components. Dirt may also cause faulty operation of the fan speed control temperature sensor. Periodically vacuum dirt and dust from the inside of the mainframe, paying particular attention to the fans. Heavy accumulations of dirt should be removed with a soft brush. Change the fan filters when necessary.

CAUTION. To avoid damage to electrical contacts, do not use water or alcohol to clean the backplane card connectors.

The HFS 9003 is designed to require no adjustment under normal conditions.

HFS 9003 Service Manual

6–1

Preventive Maintenance

6–2

HFS 9003 Service Manual

Removal and Replacement

The removal and replacement procedures describe the disassembly of the HFS 9003 to service the instrument. Observe all cautions and warnings. Refer to the Diagrams section of this manual for a block diagram of the HFS 9003.

Front Panel Module

The Front Panel module, which contains the display and keypad, is a single Field Replaceable Unit. Turn off instrument power when removing or installing the front panel module.

Cards

Removal

Replacement

1. Remove the two screws holding on the front panel, one under each corner on

both sides.

2. Swing the bottom of the front panel module away from the instrument, then

lift the module off the two hooks it hangs from.

3. Disconnect the ribbon cable connecting the front panel module to the CPU

card. Mark it for proper reconnection.

1. Connect the ribbon cable between the front panel module and the CPU card.

2. Hang the top of the front panel module from the hooks at the top corners of

the mainframe, then swing the bottom of the front panel flush. Make sure all clock distribution cables are positioned in the channel in the back of the front panel module.

3. Install the two screws holding the bottom of the front panel module in place;

one is located underneath the front panel module on each side.

Pulse or data generator cards are behind the small panels in the open area of the front panel. Turn off instrument power when removing or installing cards.

Removal

HFS 9003 Service Manual

1. Remove the front panel module as described on page 6–3.

2. If the card you are removing is the time base card or any pulse or data

generator card, remove the clock distribution cable (see Figure 6–1).

6–3

Removal and Replacement

Index Marks

Pulse Card

Time Base Card

Figure 6–1: Clock Distribution Cable Location

3. Each card is fastened with two screws, one on either end of the card front panel. Remove these screws, and pull the card straight forward.

Clock Distribution Cable

Replacement

Mainframe Covers

1. Push the card into the appropriate slot through in the mainframe. Refer to the Block Diagram (see Figure 9–1 on page 9–2) to identify the proper card position in the rack. Secure the card with two screws, one on either end of the card front panel.

2. If the card is a pulse or data generator card or the time base card, reinstall the clock distribution cables. Align the index mark on the cable connectors with the index marks on the card. When all cards are installed, a clock distribution cable must connect the time base card to each pulse or data generator card (see Figure 6–1). The time base card has several connectors for clock distribution cables; it does not matter which of these connectors is used for each pulse or data generator card.

For most mainframe service operations, only the top cover needs to be removed from the mainframe.

WARNING. To avoid electric shock, disconnect the power source when removing or replacing the covers. Hazardous voltages are exposed when the covers are removed, even when the power switch is in the standby position. Use extreme caution when the product is connected to the power source while the covers are removed.

6–4

HFS 9003 Service Manual

Removal and Replacement

Removal

Replacement

The top and bottom covers are fastened with fourteen screws each. Four screws are located on each side along the edge of the cover, and three screws are located along the front and rear edges. After removing the screws, the covers may be lifted off.

Place the cover on the frame, making sure the ventilation holes are oriented over the cooling fans. Install and tighten the fourteen screws.

Power Supply Assembly

WARNING. To avoid electric shock, allow at least five minutes discharge time after disconnecting power before attempting any service to the power supply assembly. Several capacitors in the power supply assembly retain a substantial charge (up to 660 Volts) after power is disconnected.

Removal

1. Remove the top cover of the mainframe as described on page 6–4.

2. Remove the ten screws from the top cover of the power supply assembly and

remove the top cover.

Replacement

3. Remove the six screws that attach the power supply assembly to the bottom

panel; two screws are located in the exhaust air duct, two between the power supply modules, and two between the power supply chassis and the backplane. All six screws must be accessed with a long shaft screwdriver.

4. Remove four screws from the rear panel, one in each corner, and slide the

power supply assembly straight out the back.

5. If you are removing the power supply to check the +5 V secondary fuses,

stop here. Otherwise, disconnect the wires to the backplane. Note the location of each wire so it can be reconnected to the proper terminal upon reinstallation of the power supply assembly.

1. If the wires to the backplane have been disconnected, reconnect them. Refer

to Figure 3–1 on page 3–2 for backplane connections. Refer to Figure 5–1 on page 5–2 and Figure 5–2 on page 5–2 for power supply connections.

2. Carefully slide the power supply assembly into the chassis. Make sure that

none of the wires interfere with the cooling fan or get pinched between the power supply assembly and the bottom chassis panel.

3. Install and tighten the four screws on the rear panel, one in each corner.

4. Install and tighten the six screws attaching the power supply assembly to the

bottom panel.

HFS 9003 Service Manual

6–5

Removal and Replacement

5. Perform the power supply voltage performance checks described on page 5–1 to verify that the proper voltages are present on the backplane. Make these checks before plugging any cards into the card cage.

Power Supply Module: +5 V, +12 V, and –12 V

WARNING. To avoid electric shock, allow at least five minutes discharge time after disconnecting primary power before attempting any work on the power supply modules. Many capacitors in the power supply modules retain a substantial charge for several minutes after the power source is disconnected. This charge is present on easily accessible areas, such as heat sinks and capacitor housings.

WARNING. To avoid electric shock, use extreme caution when working on the power supply modules while primary power is connected. Voltages up to 660 Volts are always present in the Power Supply Modules while the HFS 9003 is connected to the power source, even when the ON/STANDBY switch is set to standby. These voltages are present on easily accessible areas, such as heat sinks and capacitor housings.

Removal

Replacement

1. Follow the procedure for removal of the power supply assembly, described on page 6–5.

2. Remove the two screws from the left edge of the rear panel. The rear panel can now be lowered for access.

3. Mark all the cables connected to the power supply module and disconnect them.

4. Remove the four screws that attach the power supply module metal bracket to the rear panel. Leave the metal bracket attached to the power supply module. Remove the power supply module.

1. Position the power supply module in the rear of the power supply assembly, with the primary power connector to the left. Install and tighten four screws attaching the power supply module to the rear panel.

2. Reconnect all the power supply wiring. Refer to Figure 3–1 on page 3–2 for backplane connections. Refer to Figure 5–1 on page 5–2 and Figure 5–2 on page 5–2 for power supply connections.

3. Position the rear panel onto the power supply assembly, then install the two screws along the left edge.

6–6

HFS 9003 Service Manual

4. Carefully slide the power supply assembly into the chassis. Make sure that

none of the wires interfere with the cooling fan or get pinched between the power supply assembly and the bottom chassis panel.

5. Install and tighten the four screws on the rear panel, one in each corner.

6. Install and tighten the six screws attaching the power supply assembly to the

bottom panel.

7. Reinstall the top cover of the power supply assembly, installing and

tightening the ten screws.

8. Perform the power supply voltage performance checks described on

page 5–1 to verify that the proper voltages are present on the backplane. Make these checks before plugging any cards into the card cage.

Power Supply Module: –5.2 V, –2 V, and +24 V

Removal and Replacement

Removal

1. Follow the procedure for removal of the power supply assembly as described

on page 6–5.

2. Remove the two screws along the left edge of the power supply assembly

rear panel, allowing the rear panel to be lowered.

3. Mark all the cables connected to the power supply module and disconnect

them.

HFS 9003 Service Manual

4. Remove the four screws attaching the power supply module metal bracket to

the front panel of the power supply assembly. Leave the metal bracket attached to the power supply module. Remove the power supply module.

6–7

Removal and Replacement

Replacement

1. Position the power supply module in the front of the power supply assembly, with the primary power input connector to the left. Install and tighten four screws attaching the power supply module to the front panel of the power supply assembly.

2. Reconnect all power supply wiring. Refer to Figure 3–1 on page 3–2 for backplane connections. Refer to Figure 5–1 on page 5–2 and Figure 5–2 on page 5–2 for power supply connections.

3. Position the rear panel onto the power supply assembly, then install and tighten the two screws along the left center edge of the rear panel.

4. Carefully slide the power supply assembly into the chassis. Make sure that none of the wires interfere with the cooling fan or get pinched between the power supply assembly and the bottom chassis panel.

5. Install and tighten the four screws on the rear panel, one in each corner.

6. Install and tighten the six screws attaching the power supply assembly to the

bottom panel.

7. Reinstall the top cover of the power supply assembly, installing and tightening the four screws.

8. Perform the power supply voltage performance checks described on page 5–1 to verify that the proper voltages are present on the backplane. Make these checks before plugging any cards into the card cage.

Backplane Secondary Fuses

Secondary power fuses are located in inline fuse holders in the +5 V cabling between the power supply module and the backplane. These fuses protect against catastrophic failure, and will not normally blow. The +5 V supply has five fuses, one for each backplane slot. The appropriate fuse should be checked if the +5 V supply to a single slot has failed.

Removal

6–8

1. Remove the top cover as described on page 6–4.

2. Remove the power supply assembly as described on page 6–5. Do not

remove the power supply wires from the backplane, which is the last step of that procedure,.

3. In the +5 V wires between the power supply and the backplane, locate an open the inline fuse holders. There are five of these holders, one for each card slot.

HFS 9003 Service Manual

Removal and Replacement

Backplane

Replacement

Removal

1. Replace any faulty secondary fuses with 12 A, 250 V, type 3AG fuses,

Tektronix part number 159-0088-00. Install them in the inline fuse holders.

2. Replace the power supply assembly as described on page 6–5.

3. Replace the top cover as described on page 6–4.

The backplane is the board that the CPU, time base, and pulse or data generator cards plug into.

1. Remove the top cover as described on page 6–4.

2. Remove the power supply assembly as described on page 6–5. Perform the

last step of that procedure, the removal of power supply wires from the backplane.

3. Remove the fan wires and ON/STANDBY switch cables from the front side

of the backplane.

4. Remove the twelve screws that attach the backplane to the card cage rear

brackets. Lift the backplane out of the mainframe.

Replacement

1. Set the back plane jumpers as shown in Figure 6–2 on page 6–10.

2. Physically place the backplane in its approximate installed position.

3. Connect the fan and ON/STANDBY switch cables to the front side of the

backplane. Note that the card cage rear bracket has multiple screw holes for the backplane mounting screws. The correct screw holes are those that will position the bottom edge of the backplane



inch to



inch (2 to 3 mm)

above the chassis bottom panel. You can use any HFS 9003 card to align the backplane during installation.

4. Install and tighten the twelve backplane mounting screws. The center two

rows of screws have two flat washers under each of the screw heads; the other screws have one flat washer each.

5. Reconnect all power supply wiring. Position the wires carefully so they will

not be damaged. Refer to Figure 3–1 on page 3–2 for backplane connections. Refer to Figure 5–1 on page 5–2 and Figure 5–2 on page 5–2 for power supply connections.

6. Perform the power supply voltage performance checks described on

page 5–1 to verify that the proper voltages are present on the backplane. Make these checks before plugging any cards into the card cage.

HFS 9003 Service Manual

6–9

Removal and Replacement

J12

(to Power

Supply Fan)

Power Fail

Remote

Control

GND

(For –5.2 V

5 Places)

GND

(For +24 V)

–5.2 V

(5 Places)

+24 V GND

–2 V NC

(For –12 V)

GND

(For –2 V)

–12 V

+5 V

(5 Places)

+12 V GND

(For +12 V)

J14

(Connect Jumper

as Shown)

GND (For +5 V 5 Places)

Figure 6–2: Backplane Jumper Settings

J13 NC

J11

Mainframe

J10

Fans

To Batch Control

J1 to On/Standby Switch

6–10

HFS 9003 Service Manual

Fans

Removal and Replacement

Removal

Replacement

1. Remove the top cover as described on page 6–4.

2. Use a long shaft screwdriver to remove the six screws that attach the fan

bracket to the bottom chassis panel.

3. Remove the two screws that attach the top of the fan bracket to the card

cage.

4. Unplug the two fan power connectors from the backplane at J10 and J11.

5. Carefully lift the fan assembly from the chassis, taking care not to entangle

the power switch cable in the fan bracket. Remove the screws that attach the fans to the fan bracket.

1. Install the fans in the fan bracket.

2. Slide the fan assembly into the mainframe, taking care not to pinch the ON/STANDBY switch cable between the fan bracket and the bottom chassis

panel.

3. Connect either fan power cable to J10 and the other fan power cable to J11.

4. Using a long shaft screwdriver, install and tighten six screws that attach the

fan bracket to the bottom chassis panel.

ON/STANDBY Lamp

Removal

Replacement

5. Install and tighten two screws attaching the top of the fan bracket to the card cage.

6. Replace the top cover as described on page 6–4.

You do not need to remove the ON/STANDBY switch to replace its illuminating lamp.

1. Remove the front panel module as described on page 6–3.

2. Pull the translucent lamp cover straight off the switch. The sides are notched

for grasping.

3. Use a lamp puller to remove the lamp.

1. Push a replacement lamp (14 V, 80 mA, Tektronix part number 150-0146-00)

into the empty lamp holder.

2. Push the translucent lamp cover onto the switch, then press firmly to seat the cover.

HFS 9003 Service Manual

6–11

Removal and Replacement

ON/STANDBY Switch

3. Replace the front panel module as described on page 6–3.

Removal

Replacement

1. Remove the front panel module as described on page 6–3.

1. Remove the top cover as described on page 6–4.

2. Disconnect the ON/STANDBY switch cable from the backplane at J1.

3. Remove the four screws, one from each corner, from the mainframe front

panel (not the front panel module). Loosen the four captive screws around the card cage opening in the front front of the mainframe. Lift out the mainframe front panel.

4. Release the locking tabs that hold the ON/STANDBY switch on the front

panel, and remove the switch and cable.

1. Insert the power switch into the mainframe front panel until the locking tabs

snap into position.

2. Thread the ON/STANDBY switch cable under the fans to the backplane, and

connect them to J1. (It may be easier if you remove the fan bracket to route and connect the cable — see page the Fans Removal procedure on 6–11.)

3. Place the mainframe front panel into position and tighten four captive screws

around the card cage opening. Install and tighten the four screws, one in each corner of the mainframe front panel.

6–12

4. Replace the top cover as described on page 6–4.

5. Replace the front panel module as described on page 6–3.

HFS 9003 Service Manual

Troubleshooting

Fuses

Most of the troubleshooting information in this section covers the power supplies and mainframes. Card modules are not repairable other than by replacement.

Two primary power fuses are located on the rear panel. One fuse supplies power to the +5 V, +12 V, and –12 V power supply module; the other fuse supplies power to the –5.2 V, –2 V, and +24 V power supply module. These fuses should be inspected if voltage checks at the backplane indicate that a group of supply voltages have failed. To remove fuses, insert a screwdriver into the slot of the fuse holder cap, press in, and turn 1/8 turn counterclockwise.

Power Supply Modules

If either power supply module detects a power interruption or other failure, it may shut off both itself and the other power supply module. This shutdown, accomplished through the REMOTE SENSE lines, prevents card module damage due to partial power on conditions.

To determine which power supply module is forcing shutdown, disable the REMOTE CONTROL function.

CAUTION. To avoid damaging the card modules, remove all the cards before the performing the following procedure.

Disconnect the REMOTE CONTROL line from both power supply modules. These lines are single small-gauge wires that attach to the power supply main circuit boards. They can be identified by the connector that is installed in the line, specifically for this test.

After disconnecting the REMOTE CONTROL line, apply power and perform the power supply voltage check procedure on page 5–1. Reconnect the RE-

HFS 9003 Service Manual

6–13

Troubleshooting

Electrical Noise

MOTE CONTROL lines after performing the check and making necessary repairs.

Unlike many high efficiency switching supplies, the HFS 9003 power supply modules are designed to provide low noise power from no-load to full-load conditions. If a performance check indicates excessive electrical noise, environmental conditions or measurement technique should be inspected first.

Extremely noisy primary power can cause noisy DC voltages. An oscilloscope can be used to check incoming primary power. If excessive noise is found, an external line filter can be installed.

Faulty card modules can cause the power supplies to appear noisy. To check, remove the card modules from the mainframe and test the supplies again for noise.

When measuring noise, establish a good ground for the oscilloscope probe. Use as short a probe ground lead as possible. Connect the probe ground lead to one of the backplane ground lugs, not the chassis. Use the oscilloscope bandwidth limit since noise above 10 MHz does not indicate a problem.

Fans

Occasionally a defective cooling fan can inject noise into the +12 V supply even though the fan appears to be operating normally. To check this, unplug the fan power cables one at a time while monitoring the +12 V supply with an oscilloscope. This check should be performed twice: first with backplane jumper J13 installed; second with J13 removed, J14 in the low speed position, and the thermistor chilled to operate the fans at their lowest operating speed.

If noise appears on the –5.2 V, –2 V, or +24 V supplies, connect a 5 W to 10 W resistor to the –5.2 V supply. If the noise disappears, no problem is indicated because the noise is present only when the supply is unloaded. That does not affect normal operation of these power supplies.

Loose screws or loose covers can cause an increase in radiated EMI.

There are two circuits controlling the fans. One circuit controls the power supply module cooling fan, the other controls the two card cage fans. Both circuits are located on the backplane, and both use the same temperature sensor. All three fans draw power from the +12 V power supply. None of the fans may run if the mainframe is very cold. The fans normally start running after several minutes of operation.

6–14

HFS 9003 Service Manual

Tektronix HFS 9003 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Service Manual

Table of Contents

Specifications

Operating Information

Theory of Operation

Performance Verification

Adjustment Procedures

Maintenance

Options

Electrical Parts List

Diagrams

Mechanical Parts List

List of Figures

List of Tables

General Safety Summary

Injury Precautions

Product Damage Precautions

Safety Terms and Symbols

Certifications and Compliances

Service Safety Summary

Preface

Notation Conventions

Related Manuals

Specifications

Nominal Traits

Warranted Characteristics

Typical Characteristics

Operating Information

Menu Selections

Resetting the HFS 9003

Setting the Time Base

The RUN/STOP Button

The UNDO Button

Pulse Output

Strap Settings

Module Descriptions

Mainframe

Front Panel Module

Cards

Performance Verification

Required Test Equipment

Test Record

Verification Sequence

Check Procedures

Adjustment Procedures

Required Test Equipment

Disassembly for Adjustment

Adjustment

Preventive Maintenance

Removal and Replacement

Front Panel Module

Cards

Mainframe Covers

Power Supply Assembly

Backplane Secondary Fuses

Backplane

Fans

ON/STANDBY Lamp

ON/STANDBY Switch

Troubleshooting

Fuses

Power Supply Modules

Electrical Noise

Fans