Tektronix A6906S User Manual

User Manual

A6906S Fiber-Optic Isolation System

070-8900-04

Copyright E T ektronix, Inc. 1993. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes

that in all previously published material. Specifications and price change privileges reserved. Printed in 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. Tektronix 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 P ARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REP AIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENT AL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

EC Declaration of Conformity

Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands

declare under sole responsibility that the

A6906S Fiber Optic Isolation System

meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:

EN 55011 Class A Radiated and Conducted Emissions EN 50081-1 Emissions:

EN 60555-2 AC Power Line Harmonic Emissions

EN 50082-1 Immunity:

IEC 801-2 Electrostatic Discharge Immunity IEC 801-3 RF Electromagnetic Field Immunity IEC 801-4 Electrical Fast Transient/Burst Immunity

List of Figures iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of Tables iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Injury Precautions v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Damage Precautions vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Terms and Symbols vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standard Accessories ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Accessories ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Customer Support x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AC Power 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charging the Battery Pack 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparing for Operation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Basics 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power On and Calibration 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional T emperature Calibration 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning Fiber-Optic Cable Connectors 11. . . . . . . . . . . . . . . . . . . . . . . .

Programming 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Up 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GPIB Requirements 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting GPIB Parameters 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other Documents You Will Need 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Commands 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CALibration 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COUpling 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EVEnt? (Query Only) 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HELp? (Query Only) 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ID? (Query Only) 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INIt (No Query Form) 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PRObe? (Query Only) 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RANge 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RQS 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SET? (Query Only) 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STAndby 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRAns? (Query Only) 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TESt? (Query Only) 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Bytes and Event Codes 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A6906S Fiber-Optic Isolation System User Manual

Table of Contents

Appendix A: Specifications 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix B: Performance Verification 27. . . . . . . . . . . . . . . . . . . . . . . . .

Prerequisites 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required T est Equipment 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Offset and Noise Check 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rise Time Check 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bandwidth Check 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gain Check 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Check 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix C: GPIB Interface Messages 37. . . . . . . . . . . . . . . . . . . . . . . . .

Appendix D: Maintenance 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Fuses 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the Probe 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Compensation 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the Fiber-Optic Cable 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transmitter Panel Removal 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fiber-optic Cable Removal 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fiber-optic Cable Installation 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Panel Installation 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix E: Replaceable Parts List 53. . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Replaceable Parts List 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A6906S Fiber-Optic Isolation System User Manual

List of Figures

Table of Contents

Figure i: Power-Cord Plug Options viii. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1: A69T06 Battery Removal 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2: Battery Charging 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3: A6906S Connections for Use 3. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4: Connection of the Fiber-Optic Cable and Connector 4. . . . .

Figure 5: A69R06 Receiver Controls 9. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6: 6-Inch Ground Lead Clip 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 7: Fiber-Optic Cable and Connector Cleaning 11. . . . . . . . . . . .

Figure 8: Stacked GPIB Connectors 13. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9: Typical GPIB Network Configuration 14. . . . . . . . . . . . . . . . .

Figure 10: Noise Check Setup 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 11: Rise Time Check Setup 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 12: Bandwidth Check Setup 31. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 13: Gain Check Setup 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 14: Probe Check Setup 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 15: Replacing the probe 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 16: Removing the Panel 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 17: Fiber-optic Cable Installation (for Type A) 49. . . . . . . . . . . .

Figure 18: Connection of the Fiber-optic Cable and Connector 50. . . . .

Figure 19: Fiber-optic Cable Installation (for Type B) 51. . . . . . . . . . . .

Figure 20: Replaceable Parts 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 21: Accessories 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A6906S Fiber-Optic Isolation System User Manual

iii

Table of Contents

List of Tables

Table i: A6906S Order Options viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1: A6906S Attenuation Factors with Probe Factor Included 9. .

Table 2: A6906S GPIB Commands 16. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 3: Status Bytes 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4: Event Codes 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 5: Electrical Specifications 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6: Fiber-Optic Cable Characteristics 25. . . . . . . . . . . . . . . . . . . . .

Table 7: Battery Characteristics 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 8: Physical Characteristics 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 10: GPIB Interface Functions 26. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 11: Test Equipment Required for Performance Verification 28. .

Table 12: Gain Accuracy Limits 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 13: Available Fiber-Optic Cables 46. . . . . . . . . . . . . . . . . . . . . . . .

Table 14: Fiber-Optic Cable Changes Requiring Recalibration 46. . . .

A6906S Fiber-Optic Isolation System User Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.

Injury Precautions

Use Proper Power Cord

Avoid Electric Overload

Do Not Operate Without

Covers

Do Not Operate in

Wet/Damp Conditions

Ground the Product

Use Proper Fuse

Do Not Operate in

Explosive Atmospheres

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 probe that is outside the range specified for that probe.

To avoid electric shock or fire hazard, do not operate this product with covers or panels removed.

To avoid electric shock, do not operate this product in wet or damp conditions.

Portions of this product are grounded through the grounding conductors of the power cords. 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 fire hazard, use only the fuse types and ratings specified for this product.

To avoid injury or fire hazard, do not operate this product in an explosive atmosphere.

Wear Eye Protection

A6906S Fiber-Optic Isolation System User Manual

Wear eye protection if exposure to high-intensity rays or laser radiation exists.

General Safety Summary

Product Damage Precautions

Use Proper Power Source

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

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 statements identify conditions or practices that could result in injury or loss of life.

CAUTION statements identify conditions or practices that could result in damage to this product or other property.

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

Symbols in This Manual

Symbols on the Product

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

This symbol may appear in the manual:

This symbol indicates where specific cautions and warnings are found.

These symbols may appear on the product:

DANGER

High Voltage

Protective ground

(earth) terminal

ATTENTION

Refer to

manual

A6906S Fiber-Optic Isolation System User Manual

Preface

The A6906S Fiber-Optic Isolation System allows long-distance transmission of electrical signals. Features include:

H Ability to safely use the transmitter in a floating or ungrounded environment. H Electrical isolation between transmitter and receiver. H Up to 200 meter fiber-optic cable length (with Option 3). H 100 MHz bandwidth.

The A6906S Fiber-Optic Isolation System converts an input analog electrical signal into an optical signal. This signal is then transmitted along the fiber-optic cable, received, and converted back into an electrical signal. This transmission scheme provides a signal transmission system that operates over long distances, offers low distortion, transmits at high speed, and electrically insulates the signal. The A6906S Fiber-Optic Isolation System has the following components:

H A69T06 Transmitter, with battery pack, fiber-optic cable, and probe. H A69R06 Receiver. H A69C06 Sealed Lead-Acid Battery Charger.

The A69T06 Transmitter is an electrical-to-optical (E/O) converter; it converts an input electrical signal into an optical signal. System gain is controlled by an attenuator that is set in a 1–2–5 sequence. The A69T06 is also provided with a variable-gain amplifier for self-calibration to maintain measurement precision. The A69T06 is powered by an internal sealed rechargeable lead-acid battery pack.

The A69R06 Receiver is an optical-to-electrical (O/E) converter. It converts an optical signal input, via a fiber-optic cable, into an electrical signal. This unit functions as the controller for the A69T06 Transmitter. It can be used to control self-calibration and transmitter attenuator switching using front-panel operations. The A69R06 can also be controlled from an external device via the GPIB (IEEE–488) interface.

The A69C06 Sealed Lead-Acid Battery Charger charges the battery pack while the battery pack is removed from the A69T06.

A6906S Fiber-Optic Isolation System User Manual

vii

Preface

Options

You can order the A6906S Fiber-Optic Isolation System with different options, as listed in Tables i and Figure i.

T able i: A6906S Order Options

Option Number Description

01 Replace standard 3 meter fiber-optic cable with 20meter cable. 02 Replace standard 3 meter fiber-optic cable with 100 meter cable. 03 Replace standard 3 meter fiber-optic cable with 200 meter cable. 04 Replace standard 3 meter fiber-optic cable with 10 meter cable.

Standard*

North American

115V

Option A3 Australian

230V

* Canadian Standards Association certification

includes these power plugs for use in the North American power network

Option A1

Universal Euro

Option A4*

North American

Figure i: Power-Cord Plug Options

230V

Option A2

230V

Option A5

Switzerland

230V

viii

A6906S Fiber-Optic Isolation System User Manual

Standard Accessories

Preface

The standard accessories that are included with the A6906S are listed below. Accessories, for example spare battery packs, can be ordered separately by using the Tektronix part numbers listed in the Replaceable Parts List on page 53.

H battery pack H 50 W BNC Cable H 50 W Feedthrough Termination H Industrial lead set (for banana plug test accessories) H Retractable Hook Probe Tip H Spare Fuse for the A69R06 H Spare Fuse for the A69C06 H Fiber-Optic Cable Connector Cleaner (set of 5)

Optional Accessories

H A6906S Fiber-Optic Isolation System User Manual H Two power cords H 6-Inch Ground Lead

The optional accessories listed below can be ordered for use with your A6906S. Tektronix part numbers for these accessories can be found in the Replaceable Parts List on page 53.

H 75 W BNC Cable H 75 W Feedthrough Termination H GPIB Cable H Index Matching Oil (for optical cable connections) H Fiber-Optic Cable Connector Cleaner (set of 200)

A6906S Fiber-Optic Isolation System User Manual

Preface

Customer Support

To help you get the best performance from your A6906S, Tektronix offers the sales, application, and service support:

Sales Support

Application Support

Service Support

To order optional equipment and accessories, call the Tektronix National Marketing Center at 1-800-426-2200. Outside the United States or Canada, contact your nearest Tektronix Service Center.

For assistance in applying the A6906S Fiber-Optic Isolation System to your measurement needs, contact Tektronix Customer Support at 1-800-835-9433 x2400, between 6 am and 5 pm Pacific time. Outside the United States or Canada, contact your nearest Tektronix Service Center.

To obtain exchange modules to repair your A6906S, call the Tektronix FastParts Center at 1-800-848-5083. If you want Tektronix to perform repair or calibration services, or should your A6906S system need repair beyond that described in this manual, contact your nearest Tektronix Service Center.

A6906S Fiber-Optic Isolation System User Manual

Getting Started

This section tells you how to set up the A6906S Fiber-Optic Isolation System for battery charging and normal operation. Since the A69T06 Transmitter operates using battery power, you will first need to charge the battery pack.

AC Power

The A6906S Fiber-Optic Isolation System is capable of continuous operation with input voltages that range from 90 V to 250 V with source voltage frequencies from 47 Hz to 66 Hz.

Detachable three-wire power cords with three-contact plugs are provided with the A69R06 Receiver and A69C06 Sealed Lead-Acid Battery Charger for connection to both the power source and protective ground. For electrical shock protection, insert these plugs into a power source outlet that has a properly grounded protective ground contact.

Charging the battery pack

The A69T06 Transmitter is powered from a battery pack. To charge the battery pack, you need to remove it from the A69T06 Transmitter. It takes 12 hours to charge a battery pack that has been fully discharged. You cannot use a battery pack to power the A6906S while the battery pack is charging, but you can use a second battery pack to operate the A69T06 while charging a battery pack using the A69C06.

WARNING. Before removing the battery pack for charging, disconnect the probe from the circuit being measured.

Do not put your hand or any foreign object into the battery pack compartment after removing the battery pack.

Do not use the A69C06 Sealed Lead-Acid Battery Charger with any instrument or battery other than the A6906S battery pack.

1. Connect the A69C06 Sealed Lead-Acid Battery Charger to the AC power

source through the supplied grounded power cord. Make sure that the green

POWER light is on.

2. Turn off the A69T06 by pressing the OFF button on the battery pack. The

red power light will turn off.

A6906S Fiber-Optic Isolation System User Manual

Getting Started

3. Remove the battery pack from the A69T06 by unscrewing the two thumb-

screws on the front of the battery pack, as shown in Figure 1. Pull the battery pack completely out of the A69T06.

Figure 1: A69T06 Battery Removal

4. Connect the cable from the A69C06 OUTPUT to the connector on the right

side of the battery pack, as shown in Figure 2.

To AC Power

Source

Side Connector

OUTPUT

Figure 2: Battery Charging

5. Make sure the red CHARGE light on the front of the A69C06 is on. When

the battery pack is fully charged, this light will turn off.

A6906S Fiber-Optic Isolation System User Manual

Preparing for Operation

Getting Started

NOTE. battery packs are shipped fully charged. If you do not see the charge light come on, the battery pack is still fully charged and can be used immediately.

6. When the battery pack is fully charged, disconnect it from the A69C06 and

reinstall it in the A69T06 Transmitter. Install the battery pack right-side up in the A69T06, or the A69T06 will not operate even though the power light turns on.

Figure 3 shows the connections necessary to use the A6906S Fiber-Optic Isolation System.

NOTE. The A69T06 Transmitter, fiber-optic cable, and A69R06 Receiver have been calibrated at the factory as a unit. Do not exchange modules among A6906S Fiber-Optic Isolation Systems; Tektronix will not warrant performance to specifications if you do so. Always use an A69T06 and A69R06 having matching serial numbers.

Test Oscilloscope

50 W oscilloscope input (or add 50 W termination here if

oscilloscope has only

high-impedance input).

50 W Output

White

75 W Output

Red

Figure 3: A6906S Connections for Use

Connecting the

Fiber-Optic Cable

The fiber-optic cable connects the A69R06 Receiver to the A69T06 Transmitter. The cable consists of two optical conductors, one for signal and one for control commands. The two optical conductors are marked with different colored protective caps: white marks the signal conductor and red marks the command conductor.

A69R06

SIGNAL

COMMAND

To AC Power

Source

Fiber-Optic Cable

A69T06

Probe

A6906S Fiber-Optic Isolation System User Manual

Getting Started

CAUTION. Be careful not to bend the fiber-optic cable excessively or apply excessive force. When storing the fiber-optic cable, be sure to replace the cable and the unit’s protective caps to protect them from soiling.

1. Remove the protective caps from the A69R06 SIGNAL and COMMAND

connectors.

2. Remove the red protective cap from the fiber-optic cable.

3. Remove the clear plastic protector from the optical surface of the fiber-optic

cable.

4. Place the cable strain relief around the A69R06 COMMAND conductor as

shown in Figure 4.

5. Insert the uncovered cable plug into the A69R06 COMMAND conductor.

Verify that the plug’s notch is completely seated in the connector’s groove and then tighten the plug retaining ring, hand tight only.

Connecting to the

Oscilloscope

Strain relief on one connector only

Figure 4: Connection of the Fiber-Optic Cable and Connector

6. Repeat steps 2 and 5 for the white-capped fiber-optic cable, connecting it to the A69R06 SIGNAL connector.

Use the included 50 W BNC cable to connect the A69R06 50 W OUTPUT to a 50 W oscilloscope input. If you have a 75 W system, you can use the 75 W OUTPUT connector instead.

If your oscilloscope has only high-impedance inputs, you can install the included 50 W feedthrough termination between the oscilloscope input and the 50 W BNC cable. Do not install the termination at the A69R06 end of the cable.

A6906S Fiber-Optic Isolation System User Manual

Getting Started

NOTE. The self-calibration feature of the A6906S requires that the 50 W output of the A69R06 be terminated into 50 W. If you are using a 75 W system, attach the 50 W feedthrough termination to the 50 W output and use the 75 W output to connect to the system input.

AC Power

Connect the A69R06 Receiver to the AC power source through the supplied grounded power cord.

Once you have connected the fiber-optic cable, the oscilloscope, and the power cord, the A6906S Fiber-Optic Isolation System system is ready to power on and use.

A6906S Fiber-Optic Isolation System User Manual

Getting Started

A6906S Fiber-Optic Isolation System User Manual

Operating Basics

This section tells you how to operate the A6906S Fiber-Optic Isolation System once it is installed.

NOTE. To use this section, you must first install the A6906S as described in the Getting Started section starting on page 1. A battery pack must be charged and installed in the A69T06 Transmitter.

Power On and Calibration

The A6906S requires that both the A69T06 Transmitter and A69R06 Receiver be powered on. The A69T06 takes power from its battery pack, and the A69R06 takes power from the AC line.

1. On the A69T06 battery pack, press the ON button to turn on transmitter

2. On the A69R06, turn on the power using the POWER OFF/ON switch on

power. The red light between the ON and OFF buttons will turn on.

the back panel. If the attenuation display shows Er1, check the fiber-optic cable connections

between the transmitter and receiver. If necessary, clean the optical connectors as described in Cleaning Optical Connectors on page 11.

Allow the system to warm up for 20 minutes before proceeding. If you do proceed to use the A6906S, perform step 3 below after 20 minutes have passed since power on. Performance to specifications is guaranteed only after 20 minutes warm-up.

3. On the A69R06 front panel, press the CAL button to initiate the calibration

procedure. The transmitter and receiver will calibrate themselves to each other. The calibration process takes approximately one minute the first time after power on, subsequent calibrations take approximately 30 seconds. When the calibration is complete, the green PASS light will turn on.

A6906S Fiber-Optic Isolation System User Manual

Operating Basics

If the red FAIL light comes on instead, check the fiber-optic cable connections between the transmitter and receiver. If necessary, clean the optical connectors as described in Cleaning Optical Connectors on page 11. If the green PASS light still doesn’t come on, the instrument needs repair.

Once the A6906S is powered up and calibrated, it is controlled by the front panel buttons on the front of the A69R06 Receiver. It can also be controlled by a GPIB computer or controller connected to the A69R06, making it a part of an automated test system.

Optional Temperature Calibration

The A69T06 monitors its internal temperature and applies internal calibration corrections to compensate for drift in offset. Temperature does not affect the A69R06 and so it has no temperature monitoring system.

Normally, temperature corrections are applied based on default correction values. You can override the default values with values that are optimized to a specific temperature; however, if the temperature changes while the override values are in effect the A69T06 will not correct the for the offset drift induced by the changed temperature. To set optimum override values, follow these steps:

Operation

1. Install the A6906S in the environment in which it will be used.

2. On the A69R06, press the CAL and COUPLING buttons simultaneously.

3. Press the A69R06 COUPLING button again.

4. Allow the temperature environment to stabilize. Do not continue to step 5

until the A69T06 has been in a temperature-stable environment for at least 20 minutes.

5. Press the A69R06 COUPLING button again. Until this step is completed, the A6906S will not respond to GPIB commands.

To return to normal operation with default temperature correction values:

1. Install the A6906S in the environment in which it will be used.

2. On the A69R06, press the CAL and COUPLING buttons simultaneously.

3. Press the A69R06 CAL button again.

To use the A6906S Fiber-Optic Isolation System to take a measurement, connect the probe to the circuit you want to test, select the ATTENUATOR and COUPLING settings on the A69R06, and view the output on the oscilloscope.

A6906S Fiber-Optic Isolation System User Manual

Operating Basics

WARNING. Do not apply the probe to voltages that exceed the maximum ratings indicated on the rear panel of the A69T06.

Figure 5: A69R06 Receiver Controls

Attenuator Controls

The ATTENUATOR controls consist of a digital readout and two buttons,

and . The digital readout displays the attenuation factor of the A69T06 and

A6906S, but does not include the 100× attenuation of the probe. The 100× light in the attenuator display is always on to remind you to include this factor when reading the displayed attenuation.

The buttons adjust the attenuation factor up or down, to increase or decrease the displayed height of the signal on the oscilloscope display. Table 1 shows the attenuation factors of the A69T06 including probe.

T able 1: A6906S Attenuation Factors with Probe Factor Included

Probe Tip to Displayed Attenuation Factor

Oscilloscope Input

Attenuation

1:50 5,000× 8mV 1:20 2,000× 20 mV 1:10 1,000× 40 mV 1:5 500× 80 mV 1:2 200× 200 mV 1:1 100× 400 mV 2:1 50× 800 mV 5:1 20× 2.0 V

Output Amplitude of a 40 V

Signal

p-p

p-p p-p p-p

p-p

A6906S Fiber-Optic Isolation System User Manual

Operating Basics

Calibration Controls

Coupling Controls

Oscilloscope Controls

6-Inch Ground Lead

The CAL button starts the self-calibration process . This performs automatic internal adjustments in the A69T06 and A69R06, and adjusts the transmitter and receiver to each other. When the calibration is complete, the green PASS and red FAIL lights tell you whether the self-calibration was successful.

If the self-calibration fails, clean the optical connectors as described in Cleaning Fiber-Optic Cable Connectors on page 11. If the green PASS light still doesn’t come on, the instrument needs repair.

The COUPLING button changes the A6906S system to either DC or AC coupling. Push the button to change the setting from one to the other. The green DC or AC lights tell you which coupling mode is selected.

The oscilloscope you use with the A6906S provides controls for triggering, horizontal size, vertical size, and other display parameters. Use these oscilloscope controls just as you would when using a regular oscilloscope probe.

Figure 6 shows the 6-inch ground lead that is included with the A6906S as a standard accessory. Use the 6-inch ground lead in place of the longer ground lead for measuring fast-rising waveforms.

WARNING. To avoid electrical shock, do not touch the metal of the ground clip. Handle the clip by the insulation above the Limit Mark as shown in Figure 6.

Limit Mark

Metal Part

Figure 6: 6-Inch Ground Lead Clip

A6906S Fiber-Optic Isolation System User Manual

Cleaning Fiber-Optic Cable Connectors

If the fiber-optic cable or front panel optical connector is dirty, the system may not perform as it should or may fail self-calibration. If the fiber-optic cable or connector is dirty, use the fiber-optic cleaner accessory to clean it as shown in Figure 7. Normally, a single cleaner can clean a number of fiber-optic cables or connectors. If the connector is extremely dirty, use a small amount of alcohol and use the cleaner only once.

Figure 7: Fiber-Optic Cable and Connector Cleaning

A6906S Fiber-Optic Isolation System User Manual

Cleaning Optical Connectors

A6906S Fiber-Optic Isolation System User Manual

Programming

Setting Up

You can use a computer to control the A6906S and make measurements. With an oscilloscope that also can be programmed, the computer and A6906S can form a complete, automated measurement system.

Your computer, also known as the controller, must be capable of operating on a GPIB bus that conforms to IEEE Std 488.1–1987. GPIB cards are available to provide this capability for personal computers.

The A69R06 Receiver has a 24-pin GPIB connector on its rear panel, as shown in Figure 8. This connector has a D-type shell and conforms to IEEE Std

488.1–1987. Attach an IEEE Std 488.1–1987 GPIB cable between this connector and your

controller. Figure 8 shows how cables can be stacked together. You can stack a second cable on either the receiver connector or the controller connector, to similarly connect your oscilloscope.

Figure 8: Stacked GPIB Connectors

A6906S Fiber-Optic Isolation System User Manual

Programming

GPIB Requirements

Observe these rules when you use your A69R06 with a GPIB network: H Assign a unique device address to each device on the bus. No two devices

can share the same device address.

H Do not connect more than 15 devices to the bus. H Connect one device for every 2 meters (6 feet) of cable used. H Do not use more than 20 meters (65 feet) of cable for the entire bus. H Power on at least two-thirds of the devices on the network while using the

network.

H Connect the devices on the network in a star or linear configuration as shown

in Figure 9. Do not use loop or parallel configurations.

Figure 9: Typical GPIB Network Configuration

Setting GPIB Parameters

You must set the GPIB parameters of the A69R06 to match the configuration of the bus and controller.

GPIB Address

Set the GPIB ADDRESS using the A69R06 front panel. The GPIB controller uses this address to send commands to the A69R06. The address of the A69R06 must be different from the addresses used by all other devices on the bus.

To set the GPIB address, press the ATTENUATOR simultaneously and then release them. The attenuator display shows the current address. Press the address is set, press the COUPLING button to return to normal operation.

GPIB Device

and COUPLING buttons

and buttons to change the address. When the proper

A6906S Fiber-Optic Isolation System User Manual

Programming

You can set the address from 0 through 30. You can also set the A69R06 to “off line,” which disables all communications with the controller, by specifying address 31.

GPIB Terminator

The termination mode specifies what conditions the A69R06 looks for to determine the end of a command. The terminator may be set to “EOI” only or “LF or EOI.” You will need to consult your controller documentation to determine which setting is best for your configuration.

To set the GPIB terminator, press the ATTENUATOR buttons simultaneously and then release them. The attenuator display shows the current termination. Press the the proper termination mode is set, press the COUPLING button to return to normal operation.

The termination mode also specifies the termination of output messages from the A69R06 to the controller. When the mode is “LF or EOI,” the A69R06 adds CR and LF characters to the end of messages. In “EOI” only mode, the A69R06 adds no characters to messages.

Commands

Command names show both upper- and lower-case characters. Only the upper-case characters are required. You can abbreviate commands by omitting lower-case characters, starting from the end. For example, you can enter the COUpling command as COUPLING, COUPL, or COU. You can use lower-case letters anyplace in command names or arguments: coUpLiNg, CouPl, or cou are valid.

A6906S Fiber-Optic Isolation System User Manual

Programming

T able 2: A6906S GPIB Commands

Command Name Description

CALibration Executes self-calibration, optionally returns result COUpling Sets or queries input coupling EVent? Returns the last pending event code HELp? Returns a list of A6906S GPIB commands ID? Returns instrument ID including firmware version numbers INIt Initializes A6906S to factory default settings PROBE? Returns the probe type RANge Sets or queries the attenuator range RQS Enables or disables system requests (SRQs) SERIAL? Returns A6906S serial number SET? Returns all A6906S settings as command string ST Andby Sets or queries standby mode

CALibration

Syntax

Returns

Examples

TRAns? Queries status of transmitter TESt? Performs A6906S self test query

Initiates the self-calibration of the A6906S. The query form returns the result.

 

PASS or FAIL, depending on the self-calibration result.

CALIBRATION performs a self-calibration of the A6906S without a return message.

CAL? might return CAL PASS.

A6906S Fiber-Optic Isolation System User Manual

COUpling

Programming

Sets or queries the input coupling of the A6906S.

Syntax

Arguments

Examples

EVEnt? (Query Only)

Syntax

COUpling AC COUpling DC COUpling?

AC sets the input to AC coupling. DC sets the input to DC coupling.

COU DC sets the A6906S input to DC coupling.

COU? might return COUP DC, indicating that the A6906S input is set to DC coupling.

Returns the error or event code for the most recent event reported by serial poll, or for the highest priority condition pending.

EVEnt?

Returns

Examples

HELp? (Query Only)

Syntax

Returns

The most recent error/event code.

EVE? might return EVENT 266 as the most recent error code.

Returns a list of commands that are recognized by the A6906S.

HElp?

Will always return the string CAL, COU, EVE, HEL, ID, INI, PRO, RAN, RQS, SET, STA, TRA, TES

A6906S Fiber-Optic Isolation System User Manual

Programming

ID? (Query Only)

Returns the A6906S identification, including the Codes and Formats Version and the firmware version.

Syntax

Returns

Examples

INIt (No Query Form)

Syntax

PRObe? (Query Only)

Syntax

ID?

The instrument identification string.

ID? may return the string ID SONY_TEK/A69R06, V81.1, FV1.00

Initializes the A6906S (both A69R06 and A69T06) to factory default settings.

INIt

Returns the type of probe connected to the A69T06. This will always be X100.

PROBETYpe?

Returns

Examples

PROBETYPE X100

PROBETY? will return PROBETYPE X100.

A6906S Fiber-Optic Isolation System User Manual

RANge

Programming

Sets or queries the A6906S attenuator range setting.

Syntax

Arguments

Examples

RANge 1:50 RANge 1:20 RANge 1:10 RANge 1:5 RANge 1:2 RANge 1:1 RANge 2:1 RANge 5:1 RANge?

The argument tells how much the A6906S should attenuate or amplify the input signal.

RAN 1:50 sets the A6906S to attenuate signals by a factor of 50. (Combined with the 100× probe, the total attenuation is a factor of 5,000.)

RAN? might return RANGE 1:1, indicating that the A6906S is set to neither amplify nor attenuate.

RQS

Enables or disables SRQs (System Requests). When disabled, the A6906S does not act on error conditions other than to log them, and does not signal that it is ready to transmit data to the controller.

Syntax

Arguments

Examples

A6906S Fiber-Optic Isolation System User Manual

RQS ON RQS OFF RQS?

ON enables SRQ events. Off disables SRQ events.

RQS ON enables SRQ events.

Programming

SET? (Query Only)

Returns a string containing all the individual programming commands required to return the A6906S to its present state. This string can be saved and sent at some future time when you want to return the A6906S to all the present settings.

STAndby

Syntax

Returns

Examples

Syntax

Arguments

SET?

COU <AC | DC>;RAN <1:50 | 1:20 | 1:10 | 1:5 | 1:2 | 1:1 | 2:1 | 5:1>;RQS <ON | OFF>;STA <ON | OFF>

SET? might return COU AC;RAN 1:2;RQS OFF;STA OFF

Enables or disables the standby mode, or queries the current standby mode setting.

STAndby ON STAndby OFF STAndby?

ON turns standby mode on, OFF turns standby mode off.

Returns

Examples

ON or OFF

STA ON turns on standby mode. STA?

might return STANDBY OFF, indicating standby mode is off.

A6906S Fiber-Optic Isolation System User Manual

TRAns? (Query Only)

Programming

Queries the state of the A69T06. This is needed because the GPIB interface is a part of the A69R06.

Syntax

Returns

Examples

TESt? (Query Only)

Syntax

Returns



NORMAL if the A69T06 has a charged battery and is responding normally, LOW if the battery pack has a low charge level, OFF if it is powered off or not responding, or UNKNOWN if the A69R06 cannot determine the status.

TRA? might return TRA NORMAL, indicating that the A69T06 is operating normally with a full battery charge.

Instructs the A6906S to perform a self-test operation and return the result.



PASS or FAIL

Examples

A6906S Fiber-Optic Isolation System User Manual

TES? might return TEST PASS, indicating that the self-test completed successfully with no errors.

Programming

Status Bytes and Event Codes

The status and error reporting system of the A69R06 interrupts the controller by asserting an SRQ (service request). The service request indicates that an event has occurred that requires attention. When the controller polls the bus, the status byte returned by the A69R06 indicates the type of event that occurred. A further EVEnt? query will return an event code that gives more specific information about the cause of the service request. The SRQ status byte and the event code provide a limited amount of information about the specific cause of the service request.

T able 3: Status Bytes

Category RQS Off RQS On RQS Off RQS On

No Status 0000 0000 0000 0000 0 0 Power On 0000 0001 0100 0001 1 65

Binary Decimal

Operation Complete 0000 0010 0100 0010 2 66 Command Error 0010 0001 0110 0001 33 97 Execution Error 0010 0010 0110 0010 34 98 Internal Error 0010 0011 01 10 0011 35 99 Execution Warning 0010 0110 0110 0110 38 102

T able 4: Event Codes

Category Code Description

Command Errors 101 Command header error

103 Command argument error 106 Missing argument 151 Command statement too long

Execution Errors 203 I/O buf fers full

204 Command received during self-calibration

Internal Errors 302 Self-calibration fail

350 Battery off

System Events 401 Power on

402 Self-calibration pass

Internal Warning 550 Low battery charge

A6906S Fiber-Optic Isolation System User Manual

Appendix A: Specifications

All specifications are subject to the following conditions:

H The A6906S and probe have been warmed up for at least 20 minutes. H The A6906S and probe have been self-calibrated at an ambient temperature

between 20_ C and 30_ C after the warm up period.

The specifications in Table 5 and Table 9 are warranted specifications unless otherwise noted. Other specifications are typical or nominal characteristics.

T able 5: Electrical Specifications

Input-to-Output Voltage Ratio

DC Offset Accuracy,

all ranges

Gain Accuracy,

50 W output, at 500 mV DC

Bandwidth, –3 dB DC to 100 MHz Flatness, passband ±5% with probe, DC to 20 MHz

User selectable: without probe (typical) with probe

1 : 50 attenuation 5,000× 1 : 20 attenuation 2,000× 1 : 10 attenuation 1,000× 1 : 5 attenuation 500× 1 : 2 attenuation 200× 1 : 1 (unity) 100× 2 : 1 gain 50× 5 : 1 gain 20×

±10 mV

without probe (typical) with probe

1 : 50 attenuation ±3.0% ±3.2% 1 : 20 attenuation ±3.0% ±3.2% 1 : 10 attenuation ±2.5% ±2.7% 1 : 5 attenuation ±2.5% ±2.7% 1 : 2 attenuation ±2.5% ±2.7% 1:1 ±2.0% ±2.3% 2 : 1 gain ±2.0% ±2.3% 5 : 1 gain ±2.0% ±2.3%

±5% without probe, DC to 30 MHz, typical Rise Time 3.5 ns Probe Input Impedance 10 MW, typical

Aberrations,

without probe with probe

A6906S Fiber-Optic Isolation System User Manual

2.9 pf, typical

, typical within first 20 ns

p-p

10%

, typical within first 20 ns

p-p

Appendix A: Specifications

T able 5: Electrical Specifications (Cont.)

Total Harmonic Distortion

1 kHz Sine Wave

Output Noise Level

DC to 100 MHz

Output Impedance,

at DC

Maximum Rated Normal Mode Input Voltage

probe tip to probe common

Maximum Rated Common Mode Input Voltage

probe common to earth ground

Maximum Output Voltage,

50 W Output

Common Mode Rejection Ratio

Common Mode Slew Rate

1.0% (at 1 V

2.0% (at 2 V

≤2.2 mV

output), typical

p-p

output), typical

p-p

RMS

50 W ±5% 75 W ±5%

848 V (DC plus peak AC) 6 kV (peak surge ≤250 ms)

p-p

without probe, 1:1 range with probe, 5:1 range

120 dB at 60 Hz, typical 80 dB at 1 MHz, typical 60 dB at 1 MHz, typical 60 dB at 10 MHz, typical 40 dB at 10 MHz, typical

100 kV/ms, typical

Delay ,

50 ns, typical

3 m Fiber-Optic

Cable

Power Requirements 90 to 250 VAC, 47 to 66 Hz

10 W (A69R06), typical 25 W (A69C06), typical

Frequency Derating with probe, typical

600 V

100 V

10 V

RMS RMS

RMS

100 kHz

MHz

100

MHz

A6906S Fiber-Optic Isolation System User Manual

T able 6: Fiber-Optic Cable Characteristics

Optical Fiber Type Plastic clad multimode fiber Core/Clad Size 200/230mm Numeric Aperture 0.4 Fiber-Optic Cable

Maximum Tension,

Cable Connector

40 kg (88 lb) 2 kg (4.4 lb)

Appendix A: Specifications

Fiber-Optic Cable Minimum Bend Radius,

no tension

100 mm 50 mm short term

T able 7: Battery Characteristics

Battery Life,

Continuous

transmitter use

at 25_ C Battery Rated Capacity 12 Ah Battery Full

Charge Time

at 25_ C

DC Supply Current from Battery to Transmitter

Maximum Battery Charge Current

12 hours

800 mA (normal mode) 150 mA (standby mode)

1.25 A

T able 8: Physical Characteristics

Weight A69T06: 7.8 kg (17.2 lb)

Outside Dimensions,

not including probe or fiber-optic cable

A6906S Fiber-Optic Isolation System User Manual

A69R06: 1.7 kg (3.7 lb) A69C06: 1.4 kg (3.1 lb)

A69T06 A69R06 and A69C06 H: 139mm (5.5 in) 56 mm (2.2in) W: 170 mm (6.7 in) 120mm (4.7 in) D: 475mm (18.7 in) 300 mm (11.8in)

Appendix A: Specifications

T able 9: Environmental Characteristics

Operating Temperature

A69T06, A69R06 A69C06

Humidity,

operating and non-operating

Non-Operating Temperature,

A69T06, A69R06 A69C06

battery pack Electrostatic Immunity 20 kV Safety Certifications UL1244, CSA-C22.2 #231–M89

0_ C to 50_ C 10_ C to 35_ C

95% relative humidity from 30_ C to 50_ C MIL-E-16400F paragraphs 4.5.9 through 4.5.9.5.1, class 4.

–25_ C to 50_ C –25_ C to 70_ C –15_ C to 30_ C (long-term storage, >1 month)

T able 10: GPIB Interface Functions

Name Subset Notes

Source Handshake SH1 Complete capability Acceptor Handshake AH1 Complete capability T alker T6 Basic talker, serial poll, unaddress if MLA Listener L4 Basic listener, unaddress if MTA Service Request SR1 Complete capability Remote/Local RL2 No local lockout Parallel Poll PPO No capability Device Clear DC1 Complete capability Device Trigger DT0 No capability Controller C0 No capability

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

This section contains a collection of procedures for checking that the A6906S Fiber-Optic Isolation System performs as warranted. The procedures check all the warranted characteristics in Appendix A: Specifications on page 23.

NOTE. A brief functional verification can be performed without test equipment. Install the A6906S Fiber-Optic Isolation System as described in Power On and Calibration on page 7, and perform the self-calibration. If the PASS light comes on, the system is verified as functional.

Prerequisites

The tests in this subsection comprise an extensive, valid confirmation of performance and functionality when the following requirements are met:

1. The battery pack must be charged as described in Charging the battery pack

on page 1. The battery pack must be installed in the A69T06.

2. The A69T06 and A69R06 must be connected with the fiber-optic cable, and

the A69R06 must be connected to an oscilloscope, as described in Preparing for Operation on page 3.

3. All cabinets must be in place.

4. The A6906S Fiber-Optic Isolation System must have been operating for a

continuous warm-up period of at least 20 minutes within the operating temperature specified in Appendix A: Specifications on page 23.

5. The self-calibration routine must have been performed and passed after the

warm-up period, as described in Power On and Calibration on page 7.

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

Required Test Equipment

Table 11 lists all the test equipment required to do the performance check.

T able 11: Test Equipment Required for Performance Verification

Description Minimum Requirements Example Purpose

Oscilloscope 350 MHz bandwidth,

automated measurement capability: Mean, RMS, Rise Time, Peak-Peak

Calibration Generator Fast-rise signal level 100 mV to

1 V, repetition rate 1MHz, rise time ≤1 ns, flatness ±2%

Sine Wave Generator 250 kHz to 100 MHz, variable

amplitude to 1 V 50 kHz reference

Coaxial Cable, 50 W Precision (2 required)

Feedthrough T ermination, 50W 50 W, female-to-male BNC

BNC to Dual Banana Connector Female BNC to male dual

50 W, 1 m (36 in), male-to-male BNC connectors

connectors

banana

into 50W,

p-p

Offset and Noise Check

Perform this check with the A6906S Fiber-Optic Isolation System connected to an oscilloscope and configured for normal use, as shown in Figure 3 on page 3. Use the 6-inch ground lead on the probe common lead.

Tektronix TDS 460 Checking noise, rise time,

aberration and bandwidth

Tektronix PG 506A Checking rise time

Tektronix SG 503 Checking bandwidth

Tektronix part number 012-0482-00

Tektronix part number 01 1-0049-01

Tektronix part number 103-0090-00

Signal connection

Signal termination

Various tests

1. Short the probe tip to the probe common lead. The connections should now

be configured as shown in Figure 10.

2. On the A69R06, set the ATTENUATOR to 1 : 1 and COUPLING to AC.

3. Set the oscilloscope as follows:

Horizontal 1 ms/div. . . . . . . . . . . . . . . .

Vertical 5 mV/div. . . . . . . . . . . . . . . . . .

Coupling AC. . . . . . . . . . . . . . . . .

Impedance 50 W. . . . . . . . . . . . . . .

BW Limit On (100 MHz). . . . . . . . . . . . . . . .

Measurement RMS and Mean. . . . . . . . . . . . .

Acquisition Mode Sample (Average off). . . . . . . . . .

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

4. To measure noise, check that the RMS measurement readout of the

oscilloscope is less than 2.2 mV.

Oscilloscope

Probe

6-inch Ground Lead

A69T06

Fiber-Optic Cable

Coaxial Cable

A69R06

Figure 10: Noise Check Setup

5. Change the oscilloscope acquisition mode to average, and the coupling to

DC.

6. To measure offset,check that the Mean measurement readout of the

oscilloscope is <±10 mV.

7. Unclip the 6-inch ground lead from the probe tip.

Rise Time Check

1. Attach a coaxial cable to the fast rise output of the calibration generator.

Attach a 50 W feedthrough termination to the other end of the coaxial cable. Attach a BNC to Dual Banana Connector to the 50 W feedthrough termination, and connect the A6906S probe to the banana jacks. Make sure the probe tip is connected to the signal jack and the 6-inch ground lead is connected to the ground jack. Attach another coaxial cable from the Trigger

Output

should now be configured as shown in Figure 11.

A6906S Fiber-Optic Isolation System User Manual

of the Cal Generator to channel 2 on the oscilloscope. The connections

Appendix B: Performance Verification

Calibration Generator

Probe

Coaxial Cable

Trig Out

50 W Feedthrough Termination

BNC to Dual Banana Connector

6-inch Ground Lead

A69T06 A69R06

Fiber-Optic Cable

Figure 11: Rise Time Check Setup

2. Set up the oscilloscope as follows:

Oscilloscope

Coaxial Cable

Horizontal 10 ns/div. . . . . . . . . . . . . . . .

Measurement Rise Time. . . . . . . . . . . . .

Trigger Source Channel 2. . . . . . . . . . . .

Trigger Coupling DC. . . . . . . . . .

Channel 1 Channel 2

Vertical 2 mV/div 200 mV/div. . . . . . . . . . . . . . . . . . . . . .

Coupling DC DC. . . . . . . . . . . . . . . . . . . . . . . . . .

Impedance 50 W 50 W. . . . . . . . . . . . . . . . . . . . . . .

BW Limit Off Off. . . . . . . . . . . . . . . . . . . . . . . . .

Averaging On On. . . . . . . . . . . . . . . . . . . . . . . . . .

3. Set up the calibration generator as follows:

Amplitude Fast Rise, Positive Slope, Max Ampl.. . . . . . . . . . . . . . . .

4. On the A69R06, set the ATTENUATOR to 1 : 1 and COUPLING to AC.

5. Adjust the calibration generator pulse amplitude for five divisions of display

on the oscilloscope, and a frequency of 1 MHz. Check that the Rise Time

measurement readout of the oscilloscope is 3.5 ns or less.

A6906S Fiber-Optic Isolation System User Manual

Bandwidth Check

Appendix B: Performance Verification

1. Attach a coaxial cable to the output of the sine wave generator. Attach a

50 W feedthrough termination to the other end of the coaxial cable. Attach a BNC to Dual Banana Connector to the 50 W feedthrough termination, and connect the A6906S probe to the banana jacks. Connect the probe tip to the signal jack and the 6-inch ground lead to the ground jack. The connections should now be configured as shown in Figure 12.

Sine Wave Generator

Oscilloscope

Probe

Coaxial Cable

50 W Feedthrough Termination BNC to Dual Banana Connector 6-inch Ground Lead

A69T06

Fiber-Optic Cable

Figure 12: Bandwidth Check Setup

2. Set up the oscilloscope:

Horizontal 5 ms/div. . . . . . . . . . . . . . . .

Vertical 10 mV/div. . . . . . . . . . . . . . . . . .

Coupling DC. . . . . . . . . . . . . . . . .

Impedance 50 W. . . . . . . . . . . . . . .

BW Limit Off. . . . . . . . . . . . . . . .

Acquisition Mode Average (8). . . . . . . . . .

Trigger Source Channel 1. . . . . . . . . . . .

Trigger Coupling DC. . . . . . . . . .

Measurement Peak–Peak. . . . . . . . . . . . .

Coaxial Cable

A69R06

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

3. On the A69R06, set the ATTENUATOR to 1 : 1 and COUPLING to AC.

4. Set the output of the sine wave generator to a reference frequency of 50 kHz.

5. Adjust the sine wave generator output level so that the Peak-Peak measure-

ment readout of the oscilloscope is 50 mV.

6. Set the oscilloscope horizontal to 5 ns/div.

7. Set the sine wave generator frequency to 100 MHz.

8. Confirm that the Peak-Peak measurement readout on the oscilloscope is

≥35.4 mV.

Gain Check

Probe

Coaxial Cable

Calibration Generator

BNC to Dual Banana Connector

6-inch Ground Lead

A69T06

Figure 13: Gain Check Setup

Oscilloscope

Coaxial Cable

A69R06

Fiber-Optic Cable

1. Attach a coaxial cable to the standard amplitude output of the calibration

generator. Attach a BNC to Dual Banana Connector to the other end of the

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

coaxial cable, and connect the A6906S probe to the banana jacks. Make sure the probe tip is connected to the signal jack and the 6-inch ground lead is connected to the ground jack. The connections should now be configured as shown in Figure 13.

2. Set up the oscilloscope:

Averaging On. . . . . . . . . . . . . . . .

Horizontal 500 ms/div. . . . . . . . . . . . . . . .

Vertical 100 mV/div. . . . . . . . . . . . . . . . . .

Coupling DC. . . . . . . . . . . . . . . . .

Impedance 50 W. . . . . . . . . . . . . . .

BW Limit On (20 MHz). . . . . . . . . . . . . . . .

Measurements Peak-Peak. . . . . . . . . . . . .

Acquisition Mode Hi Res. . . . . . . . . .

3. Set the output of the calibration generator to 10 V.

4. Set the A69R06 ATTENUATOR to 5 : 1 and DC coupling. Adjust the

trigger for a stable display. Use the TDS 460 SET LEVEL TO 50% button. Check that the oscilloscope Peak-Peak measurement readout is between

488.5 mV and 511.5 mV. Repeat for each of the A69R06 ATTENUATOR settings. Refer to Table 12 and check that the oscilloscope Peak-Peak measurement readout is within the limits given.

T able 12: Gain Accuracy Limits

Calibration ATTENUATOR Setting

5:1 10 V 100 mV/div 488.5 mV to 511.5 mV 2:1 20 V 100 mV/div 390.8 mV to 409.2mV 1:1 50 V 100 mV/div 488.5 mV to 511.5 mV 1:2 100 V 100 mV/div 486.5 mV to 513.5 mV 1:5 100 V 50 mV/div 194.6 mV to 205.4 mV 1:10 100 V 20 mV/div 97.3 mV to 102.7 mV 1:20 100 V 10 mV/div 48.4 mV to 51.6 mV 1:50 100 V 5 mV/div 19.36 mV to 20.64 mV

Generator

Voltage

Oscilloscope Vertical Size

Oscilloscope Peak-Peak Measurement Readout

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

Probe Check

1. Check that the probe readout on the A69R06 has the 100× light turned on.

2. Connect a coaxial cable to the HIGH AMPL (high amplitude) output of a

calibration generator. Attach a BNC to dual banana connector to the other end of the coaxial cable. Connect the A6906S probe to the BNC to dual banana connector by attaching the probe tip to the signal side of the BNC to dual banana connector and attaching the reference common lead to the ground side. Figure 14 illustrates these connections.

Calibration Generator

Oscilloscope

Probe

Coaxial Cable

50 W Feedthrough Termination

BNC to Dual Banana Connector

6-inch Ground Lead

A69T06 A69R06

Figure 14: Probe Check Setup

3. Set up the oscilloscope:

Horizontal 2 ms/div. . . . . . . . . . . . . . . .

Vertical 10 mV/div. . . . . . . . . . . . . . . . . .

Coupling DC. . . . . . . . . . . . . . . . .

Impedance 50 W. . . . . . . . . . . . . . .

BW Limit On (20 MHz or 100 MHz). . . . . . . . . . . . . . . .

Acquisition Mode Average. . . . . . . . . .

Coaxial Cable

Fiber-Optic Cable

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

4. Adjust the A69R06 ATTENUATOR to 1 : 1.

5. Set the calibration generator to produce a 10 kHz high-amplitude signal, and

the output amplitude to display a 5 division high waveform on the oscilloscope.

6. Confirm that the flatness of the upper waveform half is within 4% of total

signal amplitude.

A6906S Fiber-Optic Isolation System User Manual

Appendix B: Performance Verification

A6906S Fiber-Optic Isolation System User Manual

Appendix C: GPIB Interface Messages

The following explains how the A69R06 reacts to standard interface messages. Message abbreviations used are from ANSI/IEEE Std 488–1978.

My Talk Address and

My Listen Address

(MTA and MLA)

Go to Local (GTL)

Device Clear (DCL)

Selected Device

Clear (SDC)

Serial Poll Enable and

Disable (SPE and SPD)

The A69R06’s address is established as previously explained in the GPIB Address and Terminator information. When the A69R06 receives its own address along with either of these messages, it responds by entering the appropriate state: ready to talk or ready to listen.

The GTL message sets the A69R06 to local state.

The DCL message reinitializes communication between the A69R06 and the controller. In response to DCL, the A69R06 clears any input and output messages as well as any unexecuted control settings. Also cleared are any errors and events waiting to be reported (except the power-on event). If the SRQ line is asserted for any reason other than power-on, it becomes unasserted when the DCL message is received.

The SDC message performs the same function as DCL; however, only instruments that have been listen-addressed respond to SDC.

The SPE message causes the A69R06 to transmit its serial-poll status byte when it is talk addressed. The SPD message switches the A69R06 back to normal operation.

Unlisten and Untalk

(UNL and UNT)

Interface Clear (IFC)

A6906S Fiber-Optic Isolation System User Manual

When the UNL message is received, the A69R06’s listen function is placed in an idle (unaddressed) state. In the idle state, the A69R06 will not accept messages over the bus until MLA is asserted.

The talk function is placed in an idle state when the A69R06 receives the UNT message. In this state, the A69R06 cannot transmit via the bus until MTA is asserted.

When IFC is asserted, both the Talk and Listen functions are placed in an idle state. This produces the same effect as receiving both the UNT and the UNL commands.

Appendix C: GPIB Interface Messages

Remote/Local Functions

The A69R06 is always in one of the following states:

Local. The A69R06 always starts up in local mode when power is first applied. In addition, the unit switches to local mode from remote mode when one of the following occurs:

H A front panel operation is performed while in remote mode. H The REN line goes false. H The GTL message is received when addressed as a listener.

Remote. When both the ATN and REN lines are true and the A69R06 receives an MLA message, operation changes from local status to remote status.

A6906S Fiber-Optic Isolation System User Manual

Warning

The following servicing instructions are for use only by qualified personnel. To avoid personal injury, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Refer to General Safety Summary and Service Safety Summary prior to performing any service.

Appendix D: Maintenance

Most of the parts of the A6906S Fiber-Optic Isolation System cannot be serviced by the user. User repair is limited to replacing the following modules:

H The entire A69C06. H Line fuse in the A69C06. H The entire A69R06 (replacement requires factory recalibration of all

modules).

H Line fuse in the A69R06. H The entire A69T06 (replacement requires factory recalibration of all

modules).

H battery pack in the A69T06. H Probe in the A69T06. H Fiber-Optic Cable in the A69T06 (replacement with fiber-optic cable of

different length may require factory recalibration of all modules—see Table 14 on page 46).

NOTE. The A69T06 Transmitter, fiber-optic cable, and A69R06 Receiver are calibrated at the factory as a matched unit. Tektronix does not warrant performance to specifications if you exchange modules among A6906S FiberOptic Isolation Systems. Always use an A69T06 and A69R06 having matching serial numbers.

You can replace a failed module or return it to your Tektronix Service Center for repair. If you replace the A69T06, A69R06, or in some cases replace the fiber-optic cable with one of a different length, you must return the entire A6906S Fiber-Optic Isolation System to your Tektronix Service Center for calibration or performance to specifications is not warranted.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

Replacing Fuses

Replacing the Probe

The A69R06 and A69C06 have AC line fuses. The A69T06 and the battery pack do not have user-replaceable fuses.

CAUTION. To prevent equipment damage, do not substitute a spare fuse from one assembly for another. The spare fuses for the A69C06 and the A69R06 are not interchangeable.

The housing for the fuses is a part of the line cord connector in the body of the A69R06 and A69C06 modules. To remove the fuse, unplug the AC power cord from the A69R06 or A69C06. Using a small screwdriver, open the fuse case and replace the fuse. Always replace the fuse with one of the same type and ratings.

You can replace the probe attached to the A69T06 by removing the panel of the A69T06 that the probe cord passes through. You will need a small PZ1 POSIDRIV screwdriver.

WARNING. To prevent injury or death, do not use the A6906S while the transmitter is open for access to the transmitter sub-unit. Electrical isolation is not provided and the transmitter sub-unit will be at ground potential of the system being measured.

1. Remove the panel of the A69T06 by removing the six screws holding it in

place. Pull the panel out slowly, being careful not to put tension on the fiber-optic cable.

CAUTION. To prevent cable or probe damage, do not pull on the fiber-optic cable or the fiber-optic cable connectors.

If you need more free length of fiber-optic cable, carefully pull it through the grommet holding it in the removed panel. Pull slowly and do not exert any tension on the optical connectors inside the A69T06.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

2. Pull out the two spacers holding the transmitter sub-unit inside the A69T06.

3. Reach inside the A69T06 and pull the transmitter sub-unit out, but do not

completely remove it from the case of the A69T06. See Figure NO TAG. If necessary, pull on the probe compensation box (part of the probe connector).

Transmitter

Sub-unit

Probe Cable

Grommet Housing

Toroid

Probe

Connector

Compensation

Box

Spacer

Panel

Figure 15: Replacing the probe

4. Remove the probe from the transmitter sub-unit ELEC INPUT connector by

rotating the probe connector counterclockwise and pulling it off.

5. Remove the probe cord grommet housing from the A69T06 panel by

removing the two screws holding it in place.

6. Remove the two screw and nut assemblies holding together the two halves of

the grommet assembly.

7. Pull the probe out through the A69T06 front panel.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

8. Remove the probe tip from the probe to allow the probe head to pass through

the toroid.

9. Unwind the probe cable from the toroid inside the probe cable grommet

housing. The toroid improves the high frequency CMRR performance of the A6906S.

WARNING. To prevent injury or death, do not substitute probes of different types for the double-insulated probe supplied with the A69T06. Exposed conductive parts of the probe are at ground potential of the system being measured.

10. Reassemble the A6906S in the reverse order of disassembly.

NOTE. Begin reassembly by winding the probe cable around the toroid. Wind exactly seven full turns around the toroid, and keep the toroid as close to the probe compensation box as possible. The strain relief on the probe cable coming out of the probe compensation box can be part of the cord that is wound around the toroid.

11. Before completing reassembly of the A69T06, perform a low-frequency

compensation of the new probe, as described in the next section. Perform this adustment before reinstalling the back panel.

12. After compensating the new probe, complete the assembly by reinstalling the

A69T06 back panel. Two of the six screws for this panel are shorter than the others; the shorter screws go in the middle height positions on the panel and the longer screws go in the corners.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

Probe Compensation

Perform the probe compensation with the A6906S Fiber-Optic Isolation System configured for normal use.

1. Connect the A6906S probe to the calibrator output of the test oscilloscope.

2. Adjust the A69R06 ATTENUATOR to 5 : 1.

NOTE. The common lead of the A6906S must be connected to a ground connector on the test oscilloscope for successful completion of the low-frequency probe compensation.

3. Set the test oscilloscope to display the calibrator signal.

4. Set the horizontal to display at least one full waveform cycle, and set the

vertical so that the waveform amplitude is at least 80% of full screen height.

5. Insert a non-conductive screwdriver into the hole in the A6906S probe

compensation box. Rotate the screwdriver until optimum waveform flatness is obtained. The probe compensation box is attached to the probe connector that attaches to the A69T06.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

Replacing the Fiber-Optic Cable

You can replace the fiber-optic cable with one of the cables listed in Table 13.

CAUTION. To prevent equipment damage, use extreme caution not to damage the cable or connectors when replacing a fiber-optic cable. If you do not have experience working with fiber-optic cable and connectors, you are encouraged to return the A6906S Fiber-Optic Isolation System to a Tektronix Service Center for cable replacement and calibration.

T able 13: Available Fiber-Optic Cables

Fiber-Optic Cable Length Cable Type A Cable Type B

3m 174-3152-00 174-3152-01 10 m 174-2924-01 174-2924-02 20 m 174-2925-01 174-2925-02 100 m 174-2926-01 174-2926-02 200 m 174-2927-01 174-2927-02

NOTE. If you replace the fiber-optic cable with a different length than previously installed, you may need to return the complete A6906S Fiber-Optic Isolation System to a Tektronix Service Center. Performance to specifications is not warranted unless calibrated by Tektronix.

Table 14 lists cable length changes that require system recalibration.

T able 14: Fiber-Optic Cable Changes Requiring Recalibration

Fiber-Optic Cable Length

from 3 m recalibrate recalibrate from 10 m recalibrate recalibrate from 20 m recalibrate recalibrate

to 3 m to 10 m to 20m to 100 m to 200 m

from 100 m recalibrate recalibrate recalibrate recalibrate from 200 m recalibrate recalibrate recalibrate recalibrate

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

To replace the fiber-optic cable, remove the panel of the A69T06 that the probe cord passes through using a small PZ1 POSIDRIV screwdriver.

CAUTION. Before removing the fiber-optic cable from the A69T06, make sure the other end of the cable is disconnected from the A69R06 and the cable connectors at that end have the protective caps in place. Replace the optical connector covers on the A69R06 whenever the fiber-optic cable is disconnected.

Transmitter Panel

Removal

Refer to Figure 16 when removing the transmitter panel.

1. Remove the panel of the A69T06 by unscrewing and removing the six

screws that hold it in place. Pull the panel out slowly, being careful not to pull on the fiber-optic cable.

CAUTION. Do not pull on the fiber-optic cable or the fiber-optic cable connectors. Excessive strain can damage the fiber-optic cable or probe.

2. Pull out the two spacers holding the transmitter sub-unit inside the A69T06.

Reach inside the A69T06 and pull the transmitter sub-unit out, but do not completely remove it from the case of the A69T06. If necessary, you may grasp and pull on the probe compensation box which is part of the probe connector.

WARNING. While the A69T06 Transmitter is open for access to the transmitter sub-unit, electrical isolation is not provided and the transmitter sub-unit will be at ground potential of the system being measured. Do not use the A6906S in a floating-ground mode, or use it to measure hazardous voltages, while the A69T06 is open.

3. Disconnect the probe from the ELEC INPUT connector on the transmitter

sub-unit by twisting the probe connector counterclockwise and pulling it off.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

Transmitter Sub-unit

Probe Connector

Probe Compensation Box

Figure 16: Removing the Panel

Panel

Grommet

Optical Connector

Spacer

Fiber-optic Cable Removal

If you are replacing a fiber-optic cable perform steps 1

to 3. If this is a first-time

installation, perform step 2.

1. Remove the fiber-optic cable from the transmitter sub-unit by unscrewing the

two optical connectors. Pull off the connectors along with the cable strain release.

2. Remove the optical cable grommet from the A69T06 panel by removing the

two screws holding it in place. Once unscrewed, the grommet will disassemble into two pieces.

3. Pull out one connector at a time through the A69T06 panel.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

Fiber-optic Cable

Installation

(OPTICAL FIBER

The installation procedure varies depending on whether the fiber-optic cable is type A or B as shown in Table 13 on page 46.

Installation for Fiber-optic Cable Type A

See Figure17 for installing the fiber-optic cable type A.

Hole

CABLE)

Sleeve

Strain relief

Panel

Probe

Fiber-optic cable

Grommet

White protective cap for

SIGNAL connector

To the connector

on the transmitter

sub-unit

Red protective cap for COMMAND connector

Figure 17: Fiber-optic Cable Installation (for Type A)

1. Pass one of the optical connectors from outside to inside through the hole labeled OPTICAL FIBER CABLE on the panel.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

CAUTION. You cannot pass the other connectors through the hole unless the protective caps are removed. To prevent damage, be careful not to get the connectors dirty.

2. Remove the protective cap from the other connector, and then pass that

connector from outside to inside through the hole on the panel.

3. Pass the strain relief from outside to inside through the hole on the panel.

4. Connect the SIGNAL connector (with white protective cap) of the fiber-op-

tic cable to the OPTICAL SIGNAL INPUT connector on the transmit sub-unit.

5. Place the cable strain relief around the OPTICAL COMMAND INPUT

connector on the transmit sub-unit, as show in Figure 18.

Strain relief on one connector only

Figure 18: Connection of the Fiber-optic Cable and Connector

6. Connect the COMMAND connector (with red protective cap) of the fiber-optic cable to the OPTICAL COMMAND INPUT connector on the transmit sub-unit. Verify that the cable strain relief is firmly seated between the connectors.

A6906S Fiber-Optic Isolation System User Manual

Installation for Fiber-optic Cable Type B

See Figure 19 for installing the fiber-optic cable type B.

Panel

Hole

(OPTICAL FIBER

CABLE)

Sleeve

Appendix D: Maintenance

Probe

Strain relief

White protective cap for

SIGNAL connector

To the connector

on the transmitter

sub-unit

Grommet

Red protective cap for COMMAND connector

Fiber-optic cable

Figure 19: Fiber-optic Cable Installation (for Type B)

1. Pass one of the optical connectors from outside to inside through the hole labeled OPTICAL FIBER CABLE on the panel.

CAUTION. You cannot pass the other connector through the hole unless the protective cap is removed. To prevent equipment damage, be careful not to get the connector dirty.

2. Remove the protective cap from the other connector, and then pass that connector from outside to inside through the hole on the panel.

A6906S Fiber-Optic Isolation System User Manual

Appendix D: Maintenance

3. Move the strain relief backward from the sleeve of the fiber-optic cable, and

then pass the whole sleeve completely through the hole on the panel.

4. As slightly bending the end of the strain relief where the fiber-optic cable is

passing through, pass the whole strain relief from outside to inside through the hole on the panel.

5. Connect the SIGNAL connector (with white protective cap) of the fiber-op- tic cable to the OPTICAL SIGNAL INPUT connector on the transmit sub-unit.

6. Place the cable strain relief around the OPTICAL COMMAND INPUT connector on the transmit sub-unit, as show in Figure18.

7. Connect the COMMAND connector (with red protective cap) of the fiber-optic cable to the OPTICAL COMMAND INPUT connector on the transmit sub-unit. Verify that the cable strain relief is firmly seated between the connectors.

Panel Installation

Calibration

1. Cover the fiber-optic cable sleeve with two pieces of optical cable grommet while observing the orientation of the grommet in the panel; the long end points away from the transmitter sub-unit, and then install the grommet into the panel as was being installed before.

2. Connect the probe to the ELEC INPUT connector on the transmitter sub-unit.

CAUTION. When re-installing the panel, be careful not to put the fiber-optic cable between the panel and the cabinet.

3. Re-install the panel of the A69T06 by screwing the six screws. Two of the six screws for the panel are shorter than the others; the shorter screws go into the middle height positions on the panel and the longer screws go into the corners.

Perform the performance check for the A6906S instrument as described in Appendix B: Performance Verification.

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List

This section contains a list of the components that are replaceable for the A6906S Fiber-Optic Isolation System. As described below, use these lists to identify and order replacement parts.

Parts Ordering Information

Replacement parts are available from or through your local Tektronix, Inc., service center or representative.

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements. Therefore, when ordering parts, it is important to include the following information in your order:

H Part number. H Instrument type or model number. H Instrument serial number. H Instrument modification number, if applicable.

If a part you order has been replaced with a different or improved part, your local Tektronix service center or representative will contact you concerning any change in the part number.

Using the Replaceable Parts List

The tabular information in the Replaceable Parts List is arranged for quick retrieval. Understanding the structure and features of the list will help you find all the information you need for ordering replacement parts.

Item Names

In the Replaceable Parts List, an Item Name is separated from the description by a colon (:). Because of space limitations, an Item Name may sometimes appear as incomplete. For further Item Name identification, U.S. Federal Cataloging Handbook H6–1 can be used where possible.

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List

Indentation System

Abbreviations

This parts list is indented to show the relationship between items. The following example is of the indentation system used in the Description column:

1 2 3 4 5 Name & Description Assembly and/or Component

Attaching parts for Assembly and/or Component

(END ATTACHING PARTS)

Detail Part of Assembly and/or Component Attaching parts for Detail Part

(END ATTACHING PARTS)

Parts of Detail Part Attaching parts for Parts of Detail Part

(END ATTACHING PARTS)

Attaching parts always appear at the same indentation as the item it mounts, while the detail parts are indented to the right. Indented items are part of, and included with, the next higher indentation. Attaching parts must be purchased separately, unless otherwise specified.

Abbreviations conform to American National Standards Institute (ANSI) standard Y1.1.

CROSS INDEX – MFR. CODE NUMBER TO MANUFACTURER

 

S3109

TK0191 SONY/TEKTRONIX PO BOX 5209,

TK2541 AMERICOR ELECTRONICS LTD 2682 W COYLE AVENUE ELK GROVE VILLAGE IL 60007 0B445 ELECTRI–CORD MFG CO INC 312 EAST MAIN ST WESTFIELD PA 16950 64537 KDI ELECTRONICS INC

80009 TEKTRONIX INC 14150 SW KARL BRAUN DR

     

FELLER 72 Veronica Ave

Unit 4

TOKYO INTERNATIONAL

31 FARINELLA DR EAST HANOVER NJ 07936

SUBSIDIARY OF KDI CORP

PO BOX 500

Summerset NJ 08873

TOKYO JAPAN 100–31

BEAVERT ON OR 97077–0001

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List

Fig. & Index

No.

16–1

–2 650–3122–00

–3 650–3022–00 1 BATTERY PACK AS:6V 12AH,SHIELDED LEAD–ACID

–4 159–0345–00 1 FUSE,CARTRIDGE:DIN,1A,250V,FAST 80009 159034500 –5 159–0260–00 1 FUSE,CARTRIDGE:2A,250V,MEDIUM 80009 159026000 –6 650–3063–00 1 RECEIVER: A69R06 80009 650306300 –7 174–3152–00

–8 200–4146–00 2 COVER,DUST:FC TYPE FBR OPT CONN,WHITE 80009 200414600 –9 650–3064–00 1 BATTERY CHARGER: A69C06 80009 650306400 –10 206–0461–00 1 PROBE,HEAD:100X,BLACK

–11 013–0107–08 1 TIP,PROBE:MINIATURE/COMPACT SIZE,BLACK

–12 200–4147–00 2 COVER,DUST:FC TYPE FBR OPT CONN,RED 80009 200414700 –13 200–4173–00 2 CAP,DUST:FC TYPE OPT FBR CONN,PLASTIC 80009 200417300

Tektronix

Part No.

010–0568–00 1 PROBE,PASSIVE:DOUBLE INSULA TED,100X

650–3122–01 650–3123–00 650–3123–01

174–2925–01

174–2926–01

174–2927–01

174–2924–01

Serial No.

Effective Dscont

J300000 J300291 J300000 J300291

J300290

Qty

12345 Name & Description

(ALSO INCLUDES 16-10 AND 16-11)

TRANSMITTER:W/INSULA TING BOX (A69T06) (STANDARD ONLY)

TRANSMITTER:W/INSULA TING BOX (A69T06;03) (OPTION 03 ONLY)

BATTERY

CA ASSY,FBR OPT:3M L,MULTIMODE,FC TO FC

(STANDARD ONLY) CA ASSY,FBR OPT:20M L,MULTIMODE,FC TO FC,

W/TENSION RELIEF (OPTION 01 ONLY) CA ASSY,FBR OPT:100M L,MULTIMODE,FC TO FC,

W/TENSION RELIEF (OPTION 02 ONLY) CA ASSY,FBR OPT:200M L,MULTIMODE,FC TO FC,

W/TENSION RELIEF (OPTION 03 ONLY) CA ASSY,FBR OPT:10M L,MULTIMODE,FC TO FC,

W/TENSION RELIEF (OPTION 04 ONLY)

(PART OF 16–1)

Mfr.

Code

80009 010056800

80009 80009 80009 80009

80009 650302200

80009 80009

80009

80009 206046100

80009 013010708

Mfr. Part No.

650312200 650312201 650312300 650312301

174315200 174292501

174292601

174292701

174292401

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List























Figure 20: Replaceable Parts

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List









Figure 21: Accessories

Fig. & Index

No.

21–

–1 011–0049–01 1 TERMN,COAXIAL:50 OHM,2W,BNC 64537 T132DS –2 012–1392–00 1 LEAD,SET :(1) SIGNAL,(1) GROUND 80009 012139200 –3 012–0057–01 1 CA ASSY ,RF:COAXIAL,;RFD,50 OHM,43 L,BNC,MALE,STR,

–4 196–3422–00 J300406 1 LEAD,ELECTRICAL23 AWG,6.000 L,BLACK PVC TK0191 196342200

Tektronix

Part No.

016–1218–00 1 CLEANER:2.5MM DIA X 130MM L,CHEMICAL TEXTILE,

161–0066–00 2 CABLE ASSY,PWR,:3,18A WG,98 L,SVT,GREY/BLK,60

161–0066–09 2 CABLE ASSY,PWR,:3,0.75MM SQ,220V,99.0 L EUROPEAN

161–0066–10 2 CABLE ASSY,PWR,:3,0.1MM SQ,250VOLT ,2.5 METERS

161–0066–11 2 CABLE ASSY,PWR,:3,1.00MM SQUARED,250V,10 AMP,

161–0066–12 2 CABLE ASSY,PWR,:3,18 AWG,98 L,SVT,GREY/BLK,

Serial No.

Effective Dscont

Qty

12345 Name & Description

STANDARD ACCESSORIES

BOTH ENDS,W/STRAIN RELIEF BOOT BOTH ENDS

STICK–TYPE,5 PIECES

DEG C,IEC BME X STR,IEC RCPT ,10A/125V (STANDARD ONLY)

(OPTION A1–EUR0PEAN)

LONG,UNITED KINGDOM,STR IEC–320 RCPT ,13 AMP FUSED UK PLUG (OPTION A2–UNITED KINGDOM)

2.5METERS LONG,AUSTRALIA, (STRAIGHT) (OPTION A3–AUSTRALIAN)

60 DEG C,BME X STR,IEC RCPT ,10A/250V (OPTION A4–NORTH AMERICAN)

Mfr.

Code

80009 012005701

80009 016121800

0B445 ECM–161–0066–00

S3109 86511000

S3109 BS/13–H05VVF3G0

S3109 198–000

TK2541 13E68,25–1E–250

Mfr. Part No.

A6906S Fiber-Optic Isolation System User Manual

Appendix E: Replaceable Parts List

Fig. & Index

No.

Tektronix

Part No.

161–0154–00 2 CABLE ASSY,PWR,:3,1.00MM SQ,250V,10A,2.5 METER

159–0260–00 1 FUSE,CARTRIDGE:2A,250V,MEDIUM 80009 159026000 159–0345–00 1 FUSE,CARTRIDGE:DIN,1A,250V,FAST 80009 159034500 070–8900–04 1 MANUAL,TECH:USER A6906S 80009 070890004

011–0055–01 1 TERM,COAXIAL:75 OHM,1W,BNC 80009 011005501 012–0991–00 1 CABLE,COMPOSITE:IDC,GBIB,2 METER,24 COND 80009 012099100 012–0074–00 1 CA ASSY,RF:COAXIAL,RFD,75 OHM 80009 012007400 016–1208–00 1 CLEANER:2.5 MM DIA X 130 MM L TEXTILE,STICK–TYPE,

252–0408–00 1 OIL:INDEX MATCHING OIL FOR OPT CONN 80009 252040800

Serial No.

Effective Dscont

Qty

(OPTION A5–SWISS)

OPTIONAL ACCESSORIES

200 PIECES

Mfr.

Code12345 Name & Description

S3109 12–H05VVF3G 00–

80009 016120800

Mfr. Part No.

A6906S Fiber-Optic Isolation System User Manual

Glossary

Amplification

The degree of increase in amplitude as a signal passes through a device such as a probe or amplifier. That is, the ratio of the output measure to the input measure. For example, a ×5 amplifier will magnify, or increase, the input signal’s voltage by a factor of 5. Amplification is the reciprocal of attenuation.

Attenuation

The degree of reduction in amplitude as a signal passes through a device such as a probe or attenuator. That is, the ratio of the input measure to the output measure. For example, 100× probe will attenuate, or reduce, the input signal’s voltage by a factor of 100. Attenuation is the reciprocal of amplification.

Bandwidth

The frequency range within which an instrument’s performance with regard to a particular characteristic falls within specified limits, usually –3 dB.

Controller

A computer that controls the action of one or more peripheral devices.

Coupling

The association of two or more systems or circuits for the transfer of power or information from one to the other.

Fiber-Optic Cable

A cable of one or more conductors that carry information in the form of the relative intensity of a signal of light.

Floating Ground

A system where signal ground is connected to a potential that is different than earth ground.

Frequency

The reciprocal of the time period. Measured in Hertz (Hz) where 1 Hz = 1 cycle per second.

Gain

See Amplification.

GPIB (General Purpose Interface Bus)

An interconnection bus and protocol that allows you to connect multiple instruments in a network under the control of a controller. Also known as IEEE 488 bus. Transfers data with eight parallel data lines, five control lines, and three handshake lines.

A6906S Fiber-Optic Isolation System User Manual

Glossary

Isolation

Electrical insulation between the input signal ground of a measurement system and earth ground. Usually, the output of an isolation system grounds the output signal to the earth ground.

Oscilloscope

An instrument for making a graph of two factors, usually voltage versus time.

Probe

An input device that connects test and measurement equipment to a circuit under test.

Query

A type of command that requests a specified condition or status of the instrument.

S/N Ratio

The ratio of the signal level to the noise level of a waveform.

SRQ

A Service ReQuest is initiated by the A69R06 in response to some internal event, in order to call this event to the attention of an external controller connected to the GPIB interface.

A6906S Fiber-Optic Isolation System User Manual

Index

Numbers

50 Ohm OUTPUT connector, 4, 5 75 Ohm OUTPUT connector, 4, 5

AC light, 10 AC power, 1 Accessories

optional, ix standard, ix

ATTENUATOR button, 9

Basic operation, 7 Battery Pack, charging, 1 Block diagram, interconnections, 3 Button

ATTENUAT OR, 9 COUPLING, 10 OFF, 1

SET?, 20 STAndby, 20 TESt, 21

TRAns, 21 Compensation, probe, 44 Computer. See Controller, GPIB Connections, 3 Connector

50 Ohm OUTPUT, 4, 5

75 Ohm OUTPUT, 4, 5

COMMAND, 4

IEEE Std 488.1–1987, 13

OUTPUT, 2

SIGNAL, 4 Controller, GPIB, 13 COUPLING button, 10 COUpling command, 17 Customer support, x

DC light, 10 Description, product, vii Display, Er1, 7

Cable

fiber-optic, 3, 11 IEEE Std 488.1–1987, 13 stacking GPIB, 13

Calibration, 7

T erminating 50 Ohm OUTPUT connector, 7 CALibration command, 16 CHARGE light, 2 Charging battery pack, 1 Cleaning, fiber-optic cable connectors, 11 Command, GPIB syntax, 15 COMMAND connector, 4 Commands

CALibration, 16

COUpling, 17

EVEnt?, 17

HELp?, 17

ID?, 18

INIt, 18

PRObe?, 18

RANge, 19

RQS, 19

Er1 display, 7 Event codes, 22 EVEnt? command, 17

FAIL light, 8 Fiber-optic cable

connecting, 3 connector cleaning, 11 replacing, 45

Fuses, 41

GPIB

address, 14 command syntax, 15 configurations, 14 connection rules, 14

A6906S Fiber-Optic Isolation System User Manual

Index

connector, 13 event codes, 22 interface functions, 26 interface messages, 37 operation, 13 parameters, 14 status bytes, 22 terminator, 15

HELp? command, 17 Horizontal size, 10

ID? command, 18 IEEE Std 488.1–1987, 13 INIt command, 18 Interconnections, 3 Interface functions, GPIB, 26 Interface messages, GPIB, 37

Light

AC, 10 CHARGE, 2 DC, 10 FAIL, 8 PASS, 7 POWER, 1

Line power, 1

PASS light, 7 Performance verification, 27 Power, line, 1 POWER light, 1 POWER OFF/ON switch, 7 Power on, 7 Probe, replacing, 42 Probe compensation, 44 PRObe? command, 18 Product description, vii

RANge command, 19 Replaceable parts, 49–54 Replacing

fiber-optic cable, 45 probe, 42

RQS command, 19

Safety information, v SET? command, 20 SIGNAL connector, 4 Size, displayed, 10 Specifications, 23 Standard, IEEE Std 488.1–1987, 13 Standard accessories, ix STAndby command, 20 Status bytes, 22 Switch, POWER OFF/ON, 7 Syntax, GPIB command, 15

OFF button, 1 Operation, 7 Optional accessories, ix Options, viii Oscilloscope

connecting, 4 controls, 10

OUTPUT connector, 2

Parts, replaceable, 49–54

TESt command, 21 TRAns command, 21 Triggering, 10

Vertical size, 10

A6906S Fiber-Optic Isolation System User Manual

Tektronix A6906S User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

A6906S Fiber-Optic Isolation System

Copyright E T ektronix, Inc. 1993. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes

WARRANTY

Table of Contents

List of Figures

List of Tables

General Safety Summary

Injury Precautions

Product Damage Precautions

Safety Terms and Symbols

Preface

Options

Standard Accessories

Optional Accessories

Customer Support

Sales Support

Application Support

Service Support

Getting Started

AC Power

Charging the battery pack

Preparing for Operation

AC Power

Operating Basics

Power On and Calibration

Optional Temperature Calibration

Operation

Attenuator Controls

Calibration Controls

Coupling Controls

Oscilloscope Controls

6-Inch Ground Lead

Cleaning Fiber-Optic Cable Connectors

Programming

Setting Up

GPIB Requirements

Setting GPIB Parameters

GPIB Address

GPIB Terminator

Other Documents You Will Need

Commands

CALibration

COUpling

EVEnt? (Query Only)

HELp? (Query Only)

ID? (Query Only)

INIt (No Query Form)

PRObe? (Query Only)

RANge

SET? (Query Only)

STAndby

TRAns? (Query Only)

TESt? (Query Only)

Status Bytes and Event Codes

Appendix A: Specifications

Appendix B: Performance Verification

Prerequisites

Required Test Equipment

Offset and Noise Check

Rise Time Check

Bandwidth Check

Gain Check

Probe Check

Appendix C: GPIB Interface Messages

Go to Local (GTL)

Device Clear (DCL)

Interface Clear (IFC)

Remote/Local Functions

Appendix D: Maintenance

Replacing Fuses

Replacing the Probe

Probe Compensation

Replacing the Fiber-Optic Cable

Fiber-optic Cable Removal

Panel Installation

Calibration