User Guide DLS-6900AWGN Single-Line Multi-Gauge Production ... · About this Guide Introduction 8 | DLS-6900AWGN User Guide Introduction This DLS-6900AWGN User Guide describes the

P/N 71-003607 REV A

User Guide

DLS-6900AWGN Single-Line Multi-Gauge Production Wireline SimulatorJanuary 2008

Spirent Communications, Inc.26750 Agoura RoadCalabasas, CA91302 USA

Copyright© 2008 Spirent Communications, Inc. All Rights Reserved.

All of the company names and/or brand names and/or product names referred to in this document, in particular, the name “Spirent” and its logo device, are either registered trademarks or trademarks of Spirent plc and its subsidiaries, pending registration in accordance with relevant national laws. All other registered trademarks or trademarks are the property of their respective owners. The information contained in this document is subject to change without notice and does not represent a commitment on the part of Spirent Communications. The information in this document is believed to be accurate and reliable, however, Spirent Communications assumes no responsibility or liability for any errors or inaccuracies that may appear in the document.

Limited WarrantySpirent Communications, Inc. (“Spirent”) warrants that its Products will conform to the description on the face of order, that it will convey good title thereto, and that the Product will be delivered free from any lawful security interest or other lien or encumbrance.

Spirent further warrants to Customer that hardware which it supplies and the tangible media on which it supplies software will be free from significant defects in materials and workmanship for a period of twelve (12) months, except as otherwise noted, from the date of delivery (the “Hardware Warranty Period”), under normal use and conditions.

To the extent the Product is or contains software (“Software”), Spirent also warrants that, if properly used by Customer in accordance with the Software License Agreement, the Software which it supplies will operate in material conformity with the specifications supplied by Spirent for such Software for a period of ninety (90) days from the date of delivery (the “Software Warranty Period”). The “Product Warranty Period” shall mean the Hardware Warranty Period or the Software Warranty Period, as applicable. Spirent does not warrant that the functions contained in the Software will meet a specific requirement or that the operation will be uninterrupted or error free. Spirent shall have no warranty obligations whatsoever with respect to any Software which has been modified in any manner by Customer or any third party.

Defective Products and Software under warranty shall be, at Spirent's discretion, repaired or replaced or a credit issued to Customer's account for an amount equal to the price paid for such Product provided that: (a) such Product is returned to Spirent after first obtaining a return authorization number and shipping instructions, freight prepaid, to Spirent's location in the United States; (b) Customer provides a written explanation of the defect or Software failure claimed by Customer; and (c) the claimed defect actually exists and was not caused by neglect, accident, misuse, improper installation, improper repair, fire, flood, lightning, power surges, earthquake, or alteration. Spirent will ship repaired Products to Customer, freight prepaid, based on reasonable best efforts after the receipt of defective Products. Except as otherwise stated, any claim on account of defective materials or for any other cause whatsoever will conclusively be deemed waived by Customer unless written notice thereof is given to Spirent within the Warranty Period. Spirent reserves the right to change the warranty and service policy set forth above at any time, after reasonable notice and without liability to Customer.

TO THE EXTENT PERMITTED BY APPLICABLE LAW, ALL IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY EXCLUDED, AND THE LIABILITY OF SPIRENT, IF ANY, FOR DAMAGE RELATING TO ANY ALLEGEDLY DEFECTIVE PRODUCT SHALL BE LIMITED TO THE ACTUAL PRICE PAID BY THE CUSTOMER FOR SUCH PRODUCT. THE PROVISIONS SET FORTH ABOVE STATE SPIRENT'S ENTIRE RESPONSIBILITY AND CUSTOMER'S SOLE AND EXCLUSIVE REMEDY WITH RESPECT TO ANY BREACH OF ANY WARRANTY.

Contents

About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8User Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Hardware Handling/Cleaning Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Protecting Your Investment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8How to Contact Us. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11About Spirent’s Involvement in Wireline Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12About the DLS-6900AWGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Chapter 2: Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Receiving and Unpacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Returning the DLS-6900AWGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Setup Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Cabling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Front Panel Components and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Port A and Port B DUT RJ-45 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Wireline Type Momentary Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Noise ON/OFF Momentary Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Loop Length/Noise Level Latching Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20LOOP/NOISE Adjustment Knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Power Indicator LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Remote Indicator LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Rear Panel Components and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Connecting to Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Connecting to a Windows Computer (for Remote Control). . . . . . . . . . . . . . . . . . . . . . . 23

Chapter 3: Control Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Installing and Running the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Communicating with DLS-6900AWGN Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Using the Find and Connect Units Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DLS-6900AWGN User Guide | 3

Contents

Configuring the Workspace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Controlling the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Using the Menu Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Using the Tool Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Using the Workspace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Adding Units to the Workspace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Removing Units From the Workspace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Using the Communications Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Disconnect Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Locate Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Wireline Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34White Noise settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Front Panel Lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Loading and Saving Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Chapter 4: Remote Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38RS-232 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Serial Communications Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Message Terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39DLS-6900 Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Example using the RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Command Syntax. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Device Dependent Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Command Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Sample Commands – Configuring the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Sample 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Sample 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Sample 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Common Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45*CLS Clear Status Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45*ESR? Event Status Register Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45*IDN? Identification Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45*PSC <NRf> Power-on Status Clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46*PSC? Power-on Status Clear Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46*RST Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46*TST? Self-Test Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Status Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Chapter 5: Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Power LED Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Remote LED Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Communication Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Appendix A: Measurements and Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Common Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Electrical Characteristics Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4 | DLS-6900AWGN User Guide

Contents

Appendix B: Background Noise Measurement Considerations. . . . . . . . . . . 61

Appendix C: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Appendix D: Safety Information and Instructions . . . . . . . . . . . . . . . . . . . . . . . 65Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Protective Grounding (Earthing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Before Operating the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Fuse Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Connections to a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Operating Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Class of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Before Operating the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Operating the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Appendix E: ESD Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69General Equipment Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69Workstation Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71



About this Guide

In About this Guide...

• Introduction . . . . 8

• User Documentation . . . . 8

• Hardware Handling/Cleaning Practices . . . . 8

• Protecting Your Investment . . . . 8

• References . . . . 8

• How to Contact Us . . . . 9


About this GuideIntroduction

IntroductionThis DLS-6900AWGN User Guide describes the Spirent DLS-6900AWGN Single-Line Multi-Gauge Production Wireline Simulator chassis and operating software. The equipment is generally referred to as the DLS-6900AWGN in this document. General information is also provided on system administration functions, testing procedures, and diagnostics.

User DocumentationDLS-6900AWGN user documentation is available in PDF format. PDF documents support product installation, provide important system reference information, and supportDLS-6900AWGN users.

The latest versions of user manuals and software updates are available on the Spirent Communications Customer Service Center (CSC) websites at(http://support.spirentcom.com and http://support.spirentcom.com.cn (China)).

Hardware Handling/Cleaning PracticesThe Spirent DLS-6900AWGN contains electronic components that are sensitive to Electrostatic Discharge (ESD) damage. To prevent premature component failure or latent product damage, it is crucial that you handle this equipment following industry standard ESD handling practices. Refer to Appendix E, “ESD Requirements,” for further information.

To clean the DLS-6900AWGN, unplug the AC power cord from the facility power or inlet of the DC power adapter. Remove and unplug the DC adapter from the power jack located on the rear panel of the DLS-6900AWG. Use a lint-free damp cloth for cleaning the exterior of the DLS-6900AWGN only.

Protecting Your InvestmentSpirent Communications is committed to providing the highest quality products and customer support possible. An annual calibration is required to ensure the unit is operating properly. Read Appendix D, “Safety Information and Instructions” before using this equipment.

ReferencesApplicable industry standard references are listed here.

• ETSI TS 101 388 (April 2002) Table A.1 Parameters Set for Generating Distributed Cable Coefficients up to 30 MHz.

• ANSI T1.417 section B.3.1 RLCG Parameters shall be as specified in Table B.2, “Cable Model Parameters for 26 AWG Twisted-Pair Cable.”


http://support.spirentcom.com

http://support.spirentcom.com.cn

About this GuideHow to Contact Us

How to Contact UsTo obtain technical support for any Spirent Communications product, please contact our Support Services department using any of the following methods:

Americas

E-mail: [email protected]: http://support.spirentcom.comToll Free: +1 800-SPIRENT (+1 800-774-7368) (US and Canada)Phone: +1 818-676-2616Fax: +1 818-880-9154Hours: Monday through Friday, 05:30 to 16:30, Pacific Time

Europe, Africa, Middle East

E-mail: [email protected]: http://support.spirentcom.comPhone: +33 (0) 1 61 37 22 70Fax: +33 (0) 1 61 37 22 51Hours: Monday through Thursday, 09:00 to 18:00, Friday, 09:00 to 17:00, Paris Time

Asia Pacific

E-mail: [email protected]: http://support.spirentcom.com.cnPhone: 400 810 9529 (mainland China)Phone: +86 400 810 9529 (outside China)Fax: +86 10 8233 0022Hours: Monday through Friday, 09:00 to 18:00, Beijing Time

The latest versions of user manuals, application notes, and software and firmware updates are available on the Spirent Communications Customer Service Center websites at http://support.spirentcom.com and http://support.spirentcom.com.cn (China).

Information about Spirent Communications and its products and services can be found on the main company websites at http://www.spirentcom.com andhttp://www.spirentcom.com.cn (China).

Company Address

Spirent Communications, Inc.26750 Agoura RoadCalabasas, CA 91302USA


mailto:[email protected]








http://www.spirentcom.com

http://www.spirentcom.com.cn


Chapter 1

Introduction

In this chapter. . .

• About Spirent’s Involvement in Wireline Simulation . . . . 12

• About the DLS-6900AWGN . . . . 12

• Recommendations . . . . 13


Chapter 1: IntroductionAbout Spirent’s Involvement in Wireline Simulation

About Spirent’s Involvement in Wireline SimulationThe DLS-6900AWGN Single-Line Multi-Gauge Production Wireline Simulator (referred to as the DLS-6900AWGN in this Guide) is a single line production wireline simulator in a 2U rack-mountable chassis. It simulates both PE04 (0.4 mm) and 26AWG cable in a single chassis. The DLS-6900AWGN performs tests over a frequency range from DC to 30 MHz, with a maximum reach of 21 kft for 26AWG cable and 7 km for PE04 cable, making the DLS-6900AWGN suitable for VDSL2/ VDSL/ ADSL2++/ ADSL2+/ ADSL2/ ADSL and SHDSL production and verification testing.

The DLS-6900AWGN also includes an internal white noise generator, which allows users to inject a range of white noise levels. The compact size of the DLS-6900AWGN makes it suitable for a developer's workstation or manufacturing environment.

Spirent Communications' DLS products are the worldwide standard for physical layer equipment used in conformance, performance, and interoperability testing. Spirent has extensive market and technology expertise leveraged from active participation at all major standards meetings including ETSI, ANSI, ITU-T, IEEE 802.3, and DSL Forum. The result is that Spirent DLS equipment provides the industry's most accurate and repeatable results, ensuring your equipment is designed for peak performance.

About the DLS-6900AWGNThe DLS-6900AWGN simulates the insertion and return loss of a twisted copper cable, sometimes called a wireline. It provides two cable types: PE04 and 26AWG. Specifications for the two cable types simulated have been derived from North American (ANSI) North American (ANSI) and ETSI standards.

Figure 1-1. DSL-6900AWGN VDSL2 Production Tester

The DLS-6900AWGN simulates a 26 AWG or 0.4 mm PE cable for VDSL2/ VDSL/ ADSL2++/ ADSL2+/ ADSL2/ ADSL and SHDSL production and verification testing.

The DLS-6900AWGN’s front panel interface can be connected to up to two external test devices (Side A and Side B) for testing a variety of local loop products such as modems and drivers. The simulated wireline gauges and lengths can be set manually with front panel controls or remotely through an RS-232 serial port with the control software or scripts. A built-in white noise source can inject noise at both sides (Side A and Side B) simultaneously. The on/off function and the noise level can be set manually with front panel controls or remotely through the RS-232 serial port with the control software or scripts.


Chapter 1: IntroductionRecommendations

The DLS-6900AWGN remote control software configures and controls the DLS-6900AWGN remotely through the RS-232 interface. The software runs on any WindowsTM XP (English version only) compatible computer. The RS-232 interface allows easy integration of the DLS-6900AWGN wireline simulator into a larger test system. You can also control the DLS-6900AWGN with scripts using simple commands.

Figure 1-2 illustrates an example of a typical test setup using the DLS-6900AWGN.

Figure 1-2. Example Test System Setup

Recommendations

Note: Read Chapter 2, “Getting Started,” thoroughly before powering up the DLS-6900AWGN. The remainder of this manual provides information about the various aspects of the wireline simulator, such as loop configurations, remote control software, specifications, and contact information.

We recommend you use Spirent’s DLS-6900AWGN software to configure and control the wireline simulator. However, we detail common and device specific commands sets that can be sent to the wireline simulator through the RS-232 interface (see Chapter 4, “Remote Control”).

If there are any questions after reading this manual, please contact your Spirent Communications sales representative or a member of the Customer Service team. Contact information is provided in “How to Contact Us” on page 9 of this manual.



Chapter 2

Getting Started



• Receiving and Unpacking the Unit . . . . 16

• Returning the DLS-6900AWGN . . . . 16

• Setup Overview . . . . 17

• Cabling Requirements . . . . 17

• Front Panel Components and Connections . . . . 18

• Rear Panel Components and Connections . . . . 22


Chapter 2: Getting StartedIntroduction

IntroductionThis chapter provides basic instructions on the setup of a DLS-6900AWGN.

Receiving and Unpacking the UnitEach DLS-6900AWGN chassis has been shipped in a reinforced shipping container. Retain this container in case you need to ship the wireline simulator. The DLS-6900AWGN system contains the following:• DLS-6900AWGN chassis

• 1 AC to DC adapter

• 1 power cord

• 1 DB9 female to DB25 male adapter

• 1 RS-232 interconnection cable

• 4 rubber feet

• 1 DLS-6900AWGN CD (software and related documents)

• 1 User Guide (PDF format)

Check that you have received all of these items and report any discrepancies to Spirent Communications. See “How to Contact Us” on page 9 for information.

Notes: • The DLS-6900AWGN is shipped with two side brackets installed for rack mounting. If you do not need to rack mount the DLS-6900AWGN, remove the two brackets by removing the screws (two on each side). Replace the screws after you have removed the brackets.

• The four (4) rubber feet are included as accessories. They can be optionally applied on the bottom of the chassis.

Returning the DLS-6900AWGNIf you need to return the DLS-6900AWGN to Spirent, follow these guideliness:

• To prepare the unit for shipment, turn the power off, disconnect all cables (including the power cable) and pack the simulators in their original cartons. Do not place any cables or accessories directly against the front panel as this may scratch the surface of the unit. It is highly recommended that all shipments are marked with labels indicating that the contents are fragile.

• Ensure that the Return Material Authorization (RMA) number is shown on the outside of the shipping carton, before you ship a unit back to the factory,

Note: The RMA number is mandatory and must be obtained from a Spirent Communications Customer Service representative before shipping the unit (see “How to Contact Us” on page 9 for complete contact information).


Chapter 2: Getting StartedSetup Overview

Setup Overview

To begin testing:

1 Connect the AC to DC adapter to the power jack on the rear panel of the DLS-6900AWGN.

2 Connect the AC to DC adapter to facility power using the included power cord.

Note: There is no power switch. As soon as the AC to DC adapter provides power, the DLS-6900AWGN power is on.

3 Connect a protective ground wire to the ground lug located at the rear panel of the DLS-6900AWGN.

4 If remote control is needed, connect an RS-232 cable from the control computer to connector at the back of the DLS-6900AWGN. Use the DB9 to DB25 adapter if necessary.

5 Connect your digital subscriber line access multiplexer (DSLAM) equipment to the port A on the front of the DLS-6900AWGN.

6 Connect your customer premise equipment (CPE) equipment to the port B on the front of the DLS-6900AWGN.

7 Manually adjust wireline gauge, wireline length, noise level, and noise on/off settings using the controls on the front panel.

Note: The same settings can be controlled from a remote computer through the RS-232 interface using the DLS-6900AWGN Remote Control software (provided on the CD) or using scripts. More details about the Remote Control software are found in Chapter 3, “Control Software.”8 If remote control is needed, start the DLS-6900AWGN software.9 Click the Find and Connect Units button on the software GUI.10 Select the desired settings.11 Begin testing.

The following sections describe more detailed setup and testing information.

Cabling RequirementsCables, switches, and other equipment may be needed to connect the DSLAM, the loop simulator, and the CPE. Cables should be kept as short as possible so minimum noise is coupled into the cables. Recommended cables are the CAT5 UTP. Since the length is typically short (for example, two feet), this does not affect measurements.

Computer display screens and power supplies radiate in DSL frequency bands. This noise may be generated by either internal or external power supplies. When the noise levels are


Chapter 2: Getting StartedFront Panel Components and Connections

greater than -140 dBm/Hz for external sources, they might limit the DSL performance and influence the test results. These devices should be placed at a safe distance from the test setup or even switched off.

Because crosstalk can occur between cabling, the interconnection wiring for Ports A and B on the front panel should be physically separated. Configure the cables so that they are not touching and the cable connecting to the DSLAM and CPE are separated as much as possible (at least 15 cm, or 6 in).

Front Panel Components and ConnectionsThe front panel components are used for connecting devices under test (DUT), reading the power and remote status, and manual (local) adjustment of all the settings. Figure 2-1 shows the key components of the DLS-6900AWGN front panel.

Figure 2-1. DLS-6900AWGN Front Panel

Table 2-1 lists and describes the components on the front panel.

Cable TypeMomentary Switch

Noise GeneratorMomentary Switch

Adjust Loop Length (switch in)Adjust Noise Level (switch out)

Loop Length or Noise Level AdjustmentLCD Display DUT Connector BDUT Connector A

PowerIndicator

Remote ControlIndicator

Rackmount Bracket (2 total)

Table 2-1. DLS-6900AWGN Front Panel Components

Component Description

Port A RJ-45 connector Used to connect to a DUT

Port B RJ-45 connector Used to connect to a DUT

Gauge (PE04/26AWG) momentary switch

Selects simulation of either PE04 or 26 AWG cable type

Pressing the switch toggles between PE04 and 26 AWG cable types.

Noise ON/OFF momentary switch

Inserts noise into the line

Pressing the switch toggles the noise on or off at both sides simultaneously.



Port A and Port B DUT RJ-45 Connectors

In a typical setup, the Telephone Exchange (Central Office) DSL equipment is connected to the Port A front panel connector and the customer site DSL equipment to the Port B connector. The pinout of the RJ-45 female connector is shown in Figure 2-2.

Figure 2-2. RJ-45 Front Panel DUT Female Connector

As shown in Figure 2-2, pin 4 (Tip) and pin 5 (Ring) carry the signal.

Note: RJ-11 male connectors can also mate to RJ-45 female receptacles.

The RJ-45 from panel connections are balanced. These leads should be shorter than 30 cm if you are using frequencies up to 30 MHz. It is possible to use longer leads as the frequency decreases.

Loop Length/Noise Levellatching switch

When pushed in, the control knob adjusts the loop lengthWhen out, the control knob adjusts the noise level

Adjust LOOP/NOISEcontrol knob

Adjusts either loop length or noise level, depending on the position of the Loop Length/Noise Level latching switch

Power LED Green = power is on and DLS-6900AWGN is operating normallyOff = power is off

Remote LED Off = a power-up just occurred or the DLS-6900AWGN is under local controlGreen = The DLS-6900AWGN received the first remote message and the command is validRed = The DLS-6900AWGN received a remote message and an error is detected. Red/Green Blinking = Clicking the Locate button in the DLS-6900AWGN software causes the remote light on the DLS-6900AWGN to turn red then green repeatedly so you can find the appropriate DLS-6900AWGN unit. See “Locate Button” on page 34 for more details.

Display LCD screen with two rows of 24 characters each.

Table 2-1. DLS-6900AWGN Front Panel Components

Component Description



Wireline Type Momentary Switch

The PE04/26 AWG momentary switch controls the gauge of the simulated wireline. When the switch is activated, the wire gauge toggles between PE04 and 26 AWG, with the latest corresponding length.

Noise ON/OFF Momentary Switch

The Noise ON/OFF momentary switch, when activated, toggles on or off the white noise injected at both sides simultaneously.

Note: The display shows the ON/OFF state of the white noise. The displayed noise level is not affected by the ON/OFF state of the noise injectors.

Loop Length/Noise Level Latching Switch

Use this switch to control the mode of the Control Knob. With the switch pushed in, the control knob adjusts loop length; with the switch out, the knob controls the injected noise level.

LOOP/NOISE Adjustment Knob

Use this knob to adjust the simulated wireline loop length or the injected noise level. While adjusting the knob, you can monitor the results on the display panel.

Loop Length

The length of the loop is adjustable. The 26 AWG segment can be set in 250 ft. increments from 0 to 21,000 feet. The 0.4 mm (PE04) segment of a loop is variable in 100 m increments from 0 to 7000 m.

The loop length is controlled using the Loop Length Adjustment knob while monitoring the front panel display

Noise Level

The DLS-6900AWGN contains an additive white gaussian noise (AWGN) source with a bandwidth of 50 KHz to 30 MHz. The noise level is controlled using the Noise Level Adjustment knob while monitoring the front panel display.

The noise level can be adjusted from -140 dBm/Hz to -90 dBm/Hz in 0.25 dB increments. The same AWGN noise level is applied at both ends of the line.

Note: Turn the knob to change the loop length and noise level. Turning the knob in a clockwise direction increases the loop length (0 to 21 kft and 0 to 7 km) or noise level (-140 dBm/Hz to -90 dBm/Hz). Turning the knob in a counter-clockwise direction decreases the loop length (21 kft to 0 and 7 km to 0) or noise level (-90 dBm/Hz to -140 dBm/Hz).



Power Indicator LED

The Power LED turns green when the power is on.

Remote Indicator LED

The Remote LED is off after a power-up or a reset. When the unit receives its first remote message, the LED turns green if the command is valid or turns red if an error is detected. An invalid command or an out-of-range value causes an error. The Remote LED stays red until the *ESR? command is received. When the Remote LED is red, the unit can still communicate as normal, but you should investigate why the error occurred. Chapter 4, “Remote Control,” shows examples on how to read the ESR register, clear the error flags, and return the Remote LED to green when error conditions have been resolved.

Notes: • All local control buttons (on the front panel) become inactive if the Key Lock status is turned on. Refer to “Device Dependent Commands” on page 41.

• Any time the Remote LED is ON, and a manual control on the front panel of the DLS-6900AWGN is activated, the Remote LED turns OFF. The Remote Control LED reflects the most recent type of control in effect (green for remote control or off for local control).

• If settings are changed from the front panel, the software will not be aware of these changes.

LCD Display

The LCD display contains two rows of 24 characters each and displays the actual DLS-6900AWGN settings.

Note: The actual displayed settings can be originated by either remote commands or local manipulation of front panel controls.

The displayed settings are as shown in Table 2-2.

Table 2-2. DLS-6900AWGN LCD Display Settings1

1 A blinking cursor LCD display indicates that the knob is out the range of valid values. This occurs at either the minimum or maximum threshold of the setting. At these two positions, only one direction of turning is valid while the opposite direction of turning is out of range. When the cursor is not blinking, the knob is in the valid range.

Display Parameter Description

GAUGE 26 AWG or PE04

LENGTH 0 to 21,000 ft. in 250 ft. steps for GAUGE 26 AWG, or

0 to 7,000 m in 100 m steps for GAUGE PE04

NOISE = ON or OFF The level of the white noise is -140 dBm/Hz to -90 dBm/Hz, in 0.25 dB steps


Chapter 2: Getting StartedRear Panel Components and Connections

Rear Panel Components and ConnectionsThe connections on the rear panel are used for connecting power and for remote control from a computer running the DLS-6900AWGN software. Figure 2-3 shows the key components of the rear panel.

Figure 2-3. DLS-6900AWGN Rear Panel

There are two connectors on the rear panel:

• Power connector. This is a miniature power jack. The inside conductor connects to the positive polarity of the supplied power.

• RS–232 (DCE) Serial Connector. This is a DB25 female connector. Connect a serial port cable from the control PC to this connector. The connector on the DLS-6900AWGN has RS-232 Data Communications Equipment (DCE) connector pin assignments.

Note: The serial cable should be a straight pin-to-pin cable.

Connecting to Power

Connect the provided AC to DC adapter to the DLS-6900AWGN and to the AC power appropriate for your specific country. Please see Appendix C, “Specifications,” for more details.

Note: A grounding lug is provided on the rear panel of the DLS-6900AWGN chassis to allow connection of a protective ground.


Chapter 2: Getting StartedRear Panel Components and Connections

Connecting to a Windows Computer (for Remote Control)

You can configure the DLS-6900AWGN remotely using a PC connected to the serial RS-232 connector on the rear panel of the DLS-6900AWGN. There are two options available to control the DLS-6900AWGN:

• Spirent Communications’ DLS-6900AWGN software, or

• Custom software and scripting using command sets.

If you are developing custom control software, refer to Chapter 4, “Remote Control,” which discusses the commands to configure the unit.

To connect the computer to the DLS-6900AWGN serial port (RS-232):

1 Connect one end of an RS-232 serial cable to the RS-232 connector located on the back panel of the DLS-6900AWGN chassis.

2 Connect the other end of the cable to a serial COM port connector on the computer.

The DLS-6900AWGN software can be set to connect to any serial port supported by Windows. Make sure there is no conflict with any other serial devices.

Note: Use the provided DB9 to DB25 adapter if necessary.



Chapter 3

Control Software



• Quick Start . . . . 26

• Installing and Running the Software . . . . 26

• Communicating with DLS-6900AWGN Hardware . . . . 28

• Configuring the Workspace . . . . 29

• Controlling the Software . . . . 30

• Using the Workspace . . . . 32

• Loading and Saving Settings . . . . 36


Chapter 3: Control SoftwareIntroduction

IntroductionThe DLS-6900AWGN Control Software is a Graphical User Interface (GUI) that lets you control DLS-6900AWGN systems from a Windows PC. The software can support multiple DLS-6900AWGN units, and it can also run without any DLS-6900AWGN hardware present to allow you to explore the capabilities of the DLS-6900AWGN or to create test configurations for later use with the hardware.

Quick Start

To quickly install and operate the software:

1 Install the software, if you haven't already done so.Read “Installing and Running the Software” for details. When completed, the installation process launches the software automatically.

2 If the program is not running, launch the software by selecting All Programs > Spirent Communications > DLS-6900 Control Software.

3 Connect your PC to the DLS-6900AWGN unit using any serial port. 4 Turn on the power to the DLS-6900AWGN.5 Click the Find and Connect Units button on the software GUI.6 Use the various controls on the software GUI to configure the DLS-6900AWGN

system.You can adjust the wireline length and gauge as well as the noise generator level and the noise ON/OFF state.

Installing and Running the SoftwareThe DLS-6900AWGN Control Software requires the Microsoft .NET framework version 2.0. If it is not installed, the Setup program will automatically attempt to download the required files from Microsoft. If there is no Internet connection available, Setup will eventually produce an error. In this case you can install the Windows Installer version 3.1 (needed for the .NET installation) and the .NET framework from the DLS-6900AWGN installation CD.

The installer is located in the following folder:DLS-6900 AWGN Control_<version number>\MS Installer

where <version number> is replaced by the version number of the software. For example, for version 1.0.0.0 of the software, the folder name is:DLS-6900 AWGN Control_1_0_0_0\MS Installer

Launch the executable and follow the onscreen prompts to complete the installation.


Chapter 3: Control SoftwareInstalling and Running the Software

The .NET framework is in the following folder:DLS-6900 AWGN Control_<version number>\DotNetFx

where <version number> is replaced by the version number of the software. For example, for version 1.0.0.0 of the software, the folder name is:DLS 6900 AWGN Control_1_0_0_0\DotNetFx

Launch the executable and follow the onscreen prompts to complete the installation.

To install the software:

1 Insert the DLS-6900AWGN installation CD. 2 Browse to the CD and launch Setup.Exe, if the installation does not start

automatically when the CD is inserted.3 Click OK to continue, if you see a security warning.

The software is installed and launched.

To start the DLS-6900AWGN software:

1 Select Start > All Programs.2 Select Spirent Communications > DLS-6900 Control Software.

The program launches and displays the main screen (Figure 3-1).

Figure 3-1. DLS-6900AWGN Software Main Screen

Menu Bar Tool Strip

Workspace

Wireline Controls

White Noise Controls

CommunicationControls

Front PanelLock


Chapter 3: Control SoftwareCommunicating with DLS-6900AWGN Hardware

The screen is divided into several areas (see Figure 3-1 on page 27):

• Menu bar. See “Using the Menu Bar” on page 30 for more details.

• Tool strip. See “Using the Tool Strip” on page 32 for more details.

• Workspace. The workspace contains panels that represent the DLS-6900AWGN systems to be controlled. Each panel has controls and status indicators for wireline, noise, front panel, and communications. When you start the program, the workspace contains a single panel, representing a single DLS-6900AWGN system.

• Wireline. Controls the gauge (either PE 0.4 mm or 26 AWG) and length of the simulated wireline.

• White Noise. Turns the noise on and off, and adjusts the noise level.

• Front Panel Lock. Disables the front panel controls of the DLS-6900AWGN to prevent unauthorized tampering.

• Communications. Displays the serial port being used to connect the DLS-6900AWGN, or displays Offline if a connection has not been established. When a DLS-6900AWGN is connected, the Disconnect and Locate buttons become active. For details, see “Using the Communications Controls” on page 34.

Communicating with DLS-6900AWGN HardwareTo communicate with the DLS-6900AWGN, you must configure the workspace, assign a serial port, and establish a connection to each unit in the workspace. The Find and Connect Units button performs these functions automatically. However, if you have other hardware (which may react adversely to an identification query) connected to the computer's serial ports, you may need to configure the workspace and assign serial ports manually.

Using the Find and Connect Units Button

Click the Find and Connect Units button (Figure 3-2) to interrogate all the serial ports of the computer to determine if there are any DLS-6900AWGN units connected. For each DLS-6900AWGN that the program finds, a corresponding DLS-6900AWGN unit entry is automatically added to the workspace. In most cases, even for controlling multiple DLS-6900AWGN units, you will be able to establish communications with the hardware using only this button.

Figure 3-2. Find and Connect Units Button


Chapter 3: Control SoftwareConfiguring the Workspace

Configuring the WorkspaceIn some cases, you may want to configure the workspace yourself, either by loading a previously saved workspace, or by defining a workspace manually.

To load a previously saved workspace:

1 Click the Load button.2 Select the desired workspace you previously saved.

The workspace reflects the workspace you just selected.

To manually define a workspace:

1 To add new units, click the Add New Unit button. 2 To remove a unit, click on it to select it, then click the Remove Selected Units button.3 To assign specific serial ports, select Communications > Show Manual Port

Assignment Screen on the menu bar.


Chapter 3: Control SoftwareControlling the Software

Controlling the SoftwareUse the menu bar and the tool strip to control of the software.

Using the Menu Bar

File Menu

Click File in the menu bar (Figure 3-3) to open the File menu (Figure 3-4).

Figure 3-3. Menu Bar

Figure 3-4. File Menu

Use the File menu to save and load to and from disk as well as to exit the software. You can choose to save the entire workspace, including all the units and their settings, or just the settings for a single unit. You can also save only the noise and wireline settings.

Note: The communications and front panel lock settings are not saved with the workspace.


Chapter 3: Control SoftwareControlling the Software

Communications Menu

Select Communications > Show Manual Port Assignment Screen (Figure 3-5). You can manually assign serial ports if you are unable to use the Find and Connect Units button.

Figure 3-5. Show Manual Port Assignments Button

On the screen that appears (Figure 3-6), click on a serial port to select it, then click Connect.

Figure 3-6. Manually Assign Serial Ports Screen

Select Menu

The Select menu (Figure 3-7) is enabled only when there is more than one DLS-6900AWGN system in the workspace. It allows you to select or deselect all the DLS-6900AWGN units in the workspace. This is useful in conjunction with the File menu operations. For example, you can first select all the units, then choose File > Load Unit Configuration to load all the units with the same previously saved configuration.

Figure 3-7. Select Menu

Help Menu

Use the Help menu to display the version information for the software.


Chapter 3: Control SoftwareUsing the Workspace

Using the Tool Strip

The tool strip (Figure 3-8) contains the following buttons that are used to configure the workspace:

• Find and Connect Units

• Load

• Save

• Add New Unit

• Remove Selected Units (not active in Figure 3-8).

Figure 3-8. Tool Strip

Using the WorkspaceThe Workspace is a representation of the test environment. Each DLS-6900AWGN unit in the test environment is represented by a panel. Figure 3-9 shows a workspace containing a single DLS-6900AWGN panel.

Figure 3-9. Workspace Containing a Single DLS-6900AWGN

Adding Units to the Workspace

You can add additional units to the workspace by clicking the Add New Unit button on the tool strip. For example, Figure 3-10 on page 33 shows a Workspace containing two DLS-6900AWGN units.



Figure 3-10. Workspace Containing Two DLS-6900AWGN Units

Removing Units From the Workspace

To remove a unit:

1 Select the unit by clicking anywhere in the associated panel.

Note: Click anywhere in the desired panel except on a control.The panel becomes shaded to indicate that it is selected (Figure 3-11).

Figure 3-11. Lower DLS-6900AWGN Unit is Selected (shaded area)



2 Click the Remove Selected Units button, which is now active in the tool strip.

Note: The software always keeps at least one DLS-6900AWGN panel in the workspace even if you attempt to remove all of the units.

Using the Communications Controls

The Communications area is shown in Figure 3-12.

Figure 3-12. Communications Controls

If the program detects a DLS-6900AWGN unit connected to a serial port, the name of the serial port is shown under Communications, and the Disconnect and Locate buttons become active.

Disconnect Button

Click the Disconnect button to close the serial port and make it available for use by other processes. You can continue to use the software, but any changes you make will not be sent to the hardware until you reconnect.

Locate Button

Click the Locate button to cause the Remote indicator on the DLS-6900AWGN front panel to turn RED and then GREEN repeatedly. This is useful when you have many DLS-6900AWGN systems, and it is not clear which system is connected to which serial port.

Wireline Settings

Use the radio buttons to select the gauge of the simulated wireline. Use the up-down arrows or type a value in the text box and press Enter to adjust the length of the wireline.

Figure 3-13. Wireline Settings



White Noise settings

Use the checkbox to switch on and off the White Noise generator. Use the up-down arrows or type a value in the text box and press Enter to adjust the White Noise level.

Figure 3-14. White Noise Settings

Front Panel Lock

Click Unlocked to disable the front panel control of the DLS-6900AWGN.

Figure 3-15. Front Panel Lock Button


Chapter 3: Control SoftwareLoading and Saving Settings

Loading and Saving SettingsYou can save and then reload the following:

• Workspace

• System configuration

• Wireline configuration

• Noise configuration settings.

Saving the workspace saves the number of units in the workspace and all their settings, including the wireline and noise settings. It does not save the communications settings. This feature allows reuse of workspace data even if the physical workspace has changed (for example, if you have added or removed DLS-6900AWGN units). Saving the system configuration stores the complete configuration of individual systems, including the wireline and noise settings.

The DLS-6900AWGN software uses the following file extensions:

• .WSP – workspace files

• .D6900 – system configuration files

• .W6900 – wireline configuration files

• .N6900 – noise generator configuration files.

Here are some things to keep in mind when using load and save with multiple units:

• If there is more than one unit in the workspace, and if no units are selected, the program assumes that you want to load or save all the units. • When saving, this prompts you to enter a file name for each unit in the work-

space. • When loading, the file contents will be applied to all the units.

• If you have selected some or all units, the following points apply:• When saving, you will be prompted to enter a file name for each selected unit. • When loading, the file contents will be applied to all selected units.


Chapter 4

Remote Control



• RS-232 Serial Interface . . . . 38

• Command Syntax . . . . 40

• Device Dependent Commands . . . . 41

• Sample Commands – Configuring the Unit . . . . 44

• Common Command Set . . . . 45

• Status Reporting . . . . 47


Chapter 4: Remote ControlIntroduction

IntroductionThe DLS-6900AWGN is controlled by means of the RS-232 serial interface, allowing the integration of the DLS-6900AWGN into a larger test system. The serial port physical interface follows the RS-232 standard.

RS-232 Serial InterfaceThe DLS-6900 uses a female DB-25 connector, and is configured as a DCE device. Since the PC serial port is normally configured as a DTE device, the DLS-6900 can be connected directly to a PC serial port without a null modem.

The RS-232 standard is equivalent to the European V.24/V.28 standards. In this manual, we use the term RS-232 to refer to both of these two standards. Generally, the computer literature uses the terms serial, COM1 and COM2 to refer to the RS-232 interface.

Note: The DLS-6900AWGN cannot use the parallel port of a computer (the female connector).

To use the RS-232 interface, connect your computer to the DLS-6900AWGN and set the computer serial port to the following settings:

• 9600 bps

• No parity

• 8 data bits per character

• 1 stop bit

• RTS/CTS hardware flow control.

Note: Do not use a null modem adapter or cable with a computer that has a standard COM port configured as a DTE.

The DLS-6900 stops transmitting data when the RTS line is low, and restarts when the RTS line is high. The DLS-6900 lowers the CTS and the DSR lines when it cannot accept data, and raises them when it can. Note that the RTS line is not the usual “Request To Send” as defined by the RS-232 standard. You can leave the RTS line set, and use only the CTS line.


Chapter 4: Remote ControlRS-232 Serial Interface

Serial Communications Programs

Most serial port communication programs can be used to control the DLS-6900. Any ASCII terminal emulator can be used. Configure the program or emulator to add linefeeds and echo typed characters locally.

Message Terminators

Messages sent to the DLS-6900 through the serial interface MUST be terminated with the line feed character (ASCII <LF>, decimal 10, hex 0A). To ensure that no characters are left in the receive buffer of the DLS-6900 from a previous incomplete command, you can send the line feed character by itself before sending new commands. Messages from the DLS-6900 are always terminated with a Line Feed character.

Some languages, such as BASIC, may automatically append a carriage return and a line feed at the end of messages. The carriage return character is not a valid terminator and will invalidate the last command. To avoid this problem, you can append a semi-colon after a string (after the quotes) when printing to the communication port. This prevents BASIC from adding the line terminator.For example: PRINT #1, “:setting:channel:length 1000”+CHR$(10);

DLS-6900 Synchronization

The easiest way to synchronize calling code with the DLS-6900 is to use the query form for setting commands, since the DLS-6900 will not send a response before it has finished executing commands.

For example, to set the line length, send “:set:chan:len 4000?” then wait for a response. When the response arrives, the code can continue.

Example using the RS-232 Interface

To change the length of the line to 4000 ft:

1 Send “:SETTING:CHANNEL:LENGTH 4000?”2 Read the serial port until the response from the DLS-6900 is received.3 Confirm that the REMOTE LED is still green; if it turns red, see Chapter 5, “Trouble-

shooting.”

To send and receive messages with error checking:

1 Send the message.2 Read the answer until you receive LF (decimal 10, hex 0A, or ASCII LF).3 Check if an error occurred with the command *ESR?


Chapter 4: Remote ControlCommand Syntax

For example, to get the identification message with the RS–232 interface, do the following:1 Send “*IDN?” (query the identification message).2 Read the answer (the messages are always terminated with LF).3 Send “*ESR?” (check if an error occurred).4 Read the answer (if not 0, see “Status Reporting” on page 47).

Command SyntaxCommands may take one of two forms: either a Device Dependent Command starting with a colon (see “Device Dependent Commands” on page 41) or a Common Command starting with a asterisk (see “Common Command Set” on page 45). Each type may be preceded by one or more spaces, and each must have one or more spaces between its mnemonic and the data associated with it.

Common commands are preceded by the character “*”. Device Dependent commands are preceded by a colon, with a colon separating each level of the command. Commands may be in either upper or lower case. Multiple commands may be concatenated by separating each command by a semicolon.

The following are some examples:

:SET:CHANNEL:GAUGE 26

:SET:CHANNEL:LENGTH 4000

:SET:CHANNEL:GAUGE 26;:SET:CHANNEL:LENGTH 4000

Messages to the DLS-6900 must be terminated with a Line Feed character (ASCII <LF>, decimal 10, hex 0A). Messages from the 6900 are always terminated with a Line Feed character.

A Device Dependent Command may be sent in its short form or long form, in upper or lower case. Therefore, the following commands are identical in operation:

:SET:CHANNEL:LENGTH 4000

:SET:CHAN:LEN 4000

Queries of the system follow the same format as the commands, except that the data normally associated with a command is replaced by a question mark “?”. Following receipt of such a command, the DLS-6900 will place the appropriate response in the output queue, where the controller can read it.

Examples are:

*IDN?

:SET:CHAN:LENGTH?


Chapter 4: Remote ControlDevice Dependent Commands

When a device-dependent command does not begin with a colon, the DLS-6900 assumes that the command is at the same level in the command tree structure as the previous command. For example, to set the calibration date and expiry one does NOT need to specify “:SYS:CAL” each time, as in:

:SYS:CAL:Date Dec 2007

:SYS:CAL:Expiry Dec 2008

Although the above example is valid, instead, the two commands could be merged onto one line:

:SYS:CAL:Date Dec 2007;Expiry Dec 2008

This shorter form is also valid because both Date and Expiry are at the same level in the command tree structure.

Device Dependent CommandsThe DLS-6900AWGN uses the following tree structure::SETting

:CHANnel

:GAUge<Gauge><?>

:LENgth <Length><?>

:SOURce

:NOIse

:STAte <state><?>

:LEVel <level><?>

:SYStem

:CALibration

:DATe <date><?>

:EXPiry <date><?>

:KLOck <state><?>

Each section of the command may be sent in the full or the truncated form (indicated in upper case). The command itself may be sent in upper or lower case form.

The DLS-6900AWGN rounds any number to the nearest number permitted by the resolution of the parameter.

Note: Settings can be interrogated by sending the command followed by a question mark (“?”), then reading the response from the unit. For example, to interrogate the line length, send “:SET:CHAN:LEN?” to the unit.



Command Details

The following subsections provide details for the device dependent commands.

:SETting:CHANnel:GAUge <Gauge><?>

This command selects the gauge of the simulated wireline, where <Gauge> is replaced by either 26 or 04 to represent 26 AWG and respectively.

For example, to set the wireline to 26 AWG, send:

:SET:CHAN:GAUGE 26

:SETting:CHANnel:LENGTH <Length><?>

This command sets the length (reach) of the line, where <Length> is the length of the simulated line.

The range of the length of the DLS-6900 depends on the selected gauge. The 26 AWG wireline can be adjusted between 0 and 21,000 ft in 250 ft increments. The PE04 mm wireline can be adjusted between 0 and 7000 m in 100 m increments.

For example, to set the length of the line to 4000 ft, send:

:SET:CHAN:LEN 4000

The units of the length are optional but if supplied, must correctly match the wireline gauge. If the wireline is set to 26 AWG, the units must be ft. If the wireline is PE04 mm, the units must be m.

:SOURce:NOISE:Level <Value><?>

This command controls the output level of the white noise generator in dBm/Hz. <Value> is replaced by any number between -140 and -90 inclusive.

For example, to set the noise level to -135.25, send:

:SOURCE:NOISE:LEVEL -135.25

:SOURce:NOISE:STAte <OFF | ON><?>

This command turns the built-in white noise generator on and off.

For example, to turn on noise, send:

:SOURCE:NOISE:STATE ON

:SYStem:CALibration:DATe <date><?>

This command will write a text string represented by <date> into non-volatile memory. You can use it to record the date on which calibration was last performed.



For example, to record the calibration date as 11/09/2007, send:

:sys:cal:date 11/09/2007

:SYStem:CALibration:EXPiry <date><?>

This command will write a text string represented by <date> into non-volatile memory. You can use it to record the date on which calibration expires.

For example, to record the calibration expiry date as 11/09/2007, send:

:sys:cal:expiry 11/09/2007

:SYStem:KLock ON/OFF

This command is used to enable and disable control of the DLS-6900 from its local front panel.

For example, to disable the front panel, send:

:sys:klock on

To enable the front panel, send:

:sys:klock off


Chapter 4: Remote ControlSample Commands – Configuring the Unit

Sample Commands – Configuring the UnitThis sample assumes that each line is sent, and a response is read from the serial port before continuing. The responses to the “*ESR?” queries should be checked – if non-zero, an error occurred. The responses to the configuration commands can be checked also for confirmation that the command was received and successfully executed.

Sample 1

This sequence of commands sets the DLS-6900 to 26 AWG, 4000 ft, Noise ON at –135.25 dBm/Hz.

:SET:CHAN:GAUGE 26?

*ESR?

:SET:CHAN:LEN 4000?

*ESR?

SOURCE:NOISE:LEVEL -135.25

*ESR?

:SOURCE:NOISE:STATE ON?

*ESR?

Sample 2

This sequence of commands sets the DLS-6900 to PE 04 mm, 400 m, Noise ON at –140 dBm/Hz.

:SET:CHAN:GAUGE 04?

*ESR?

:SET:CHAN:LEN 400?

*ESR?

SOURCE:NOISE:LEVEL -140?

*ESR?

:SOURCE:NOISE:STATE ON?

*ESR?

Sample 3

This sequence of commands sets the DLS-6900 to 26 AWG, 4000 ft, Noise OFF.

:SET:CHAN:GAUGE 26?


Chapter 4: Remote ControlCommon Command Set

*ESR?

:SET:CHAN:LEN 4000?

*ESR?

:SOURCE:NOISE:STATE OFF?

*ESR?

Common Command SetA number of common commands are required to set up and control the standard functions of remote-controlled devices.

*CLS Clear Status Command

*CLS Clear Status Command

Type: Status Command

Function: Clears the Event Status Register (ESR).

*ESR? Event Status Register Query

*ESR Event Status Register Query

Type: Status Command

Function: An integer value between 0 and 255 representing the value of the Event Status Register (ESR) is placed in the output queue. Once the value is placed in the output queue, the register is cleared. The command turns the Remote LED green if the LED was red. The possible values are described in “Status Reporting” on page 47 and “Status Reporting” on page 47.

*IDN? Identification Query

*IDN Identification Query

Type: System Command

Function: Returns the ID of the unit. Upon receiving this command, the DLS-6900AWGN puts the following string into the output queue:

SPIRENT COMM. INC,DLS 6900,<SN>,<Ver>

where: <SN> is the serial number of the unit and <Ver> is the revision level of the control firmware (always 2 digits) when all pending operations are completed.

The bit is read with the *ESR? command, which also clears the bit. Communication can proceed normally after this command. See “Status Reporting” on page 47 for more details.


Chapter 4: Remote ControlCommon Command Set

*PSC <NRf> Power-on Status Clear

*PSC Power-on Status Clear

Type: Status and Event Command

Function: Indicates if the unit should clear the Event Status Register at power-on. If 1 (or higher), the ESR is cleared at power-on. If 0, then all the ESR is restored from the non-volatile RAM at power-on. The factory default is 1 (clear ESR). Any change to the “Power-on Status” is saved in non-volatile RAM, and is always restored on power up.

*PSC? Power-on Status Clear Query

*PSC? Power-on Status Query

Type: Status and Event Command

Function: Return the Power-on Status Clear value.

*RST Reset

*RST Reset

Type: Internal Command

Function: Causes the DLS-6900 to behave as though the power has been cycled.

*TST? Self-Test Query

*TST? Self-Test Query

Type: Internal Command

Function: Returns the results of the self-test done at power up. The number returned has the bit map shown in Figure 4-1.

Figure 4-1. Self-Test Query Bit Assignment

Bits 7 to 0 have values of 128, 64, 32, 16, 8, 4, 2 and 1, respectively. For example, if the result is “3,” it indicates that the micro-controller and non-volatile RAM tests failed.


Chapter 4: Remote ControlStatus Reporting

Status ReportingThe system status is contained in the Event Status Register (ESR). The ESR monitors and reports events within the system. The ESR register bits are defined in Table 4-1.

The contents of the Event Status Register can be read with the Event Status Register query command (*ESR?). This command puts the value of the register in the output queue, and clears the register.

Table 4-1. Event Status Register Bit Assignments

Bit # Bit Name Description

7 Power On This bit is set when the DLS-6900AWGN is turned on. Sending *ESR? clears the bit and it stays cleared until the power is turned on again.

6 Not used Always 0.

5 Command Error When this bit is set, either a syntax error (order of command words) or a semantic error (spelling of command words) has occurred.

4 Execution Error The data associated with a command was out of range.

3 Device Dependent Error

This error bit is set when the DLS-6900 receives a command that is not valid for the current mode of the unit.

2 Query Error This bit, when set, indicates there was an attempt to read an empty output queue or there was an output queue overflow (maximum output queue capacity is 75 bytes).





Chapter 5

Troubleshooting


• Power LED Indications . . . . 50

• Remote LED Indications . . . . 50

• Communication Problems . . . . 50


Chapter 5: TroubleshootingPower LED Indications

Power LED IndicationsIf the power LED is off:

• Check the connections between the DLS-6900, the power supply, and the AC power.

• Check that the AC power is on.

If both of these checks are OK, there may be a hardware problem with the DLS-6900. In this case, contact Customer Service (see “How to Contact Us” on page 9).

Remote LED IndicationsIf the remote LED is off:

• This is normal after power-up, reset, or operation from the front panel.

If the remote LED is red:

• The DLS-6900 received an invalid command from the computer. See Chapter 4, “Remote Control” for more details.

Communication ProblemsIf the DLS-6900 Control Software cannot detect or connect to the DLS-6900:

• Check that no device (such as a mouse) is connected to the same serial port as the DLS-6900.

• Check the cabling.

If the DLS-6900 Control Software displays an error when communicating with the DLS-6900:

• Check that no device (such as a mouse) is connected to the same serial port as the DLS-6900.

• Check the cabling.


Appendix A

Measurements and Test Results

In this appendix . . .


• Common Errors . . . . 52

• Electrical Characteristics Test Results . . . . 53


Appendix A: Measurements and Test ResultsIntroduction

IntroductionWhen measuring the insertion loss of a balanced line or line simulator throughout the frequency domain, the setup shown in Figure A-1 is recommended.

Figure A-1. Setup for Measuring Electrical Characteristics

In Figure A-1, Rg, RL and the coaxial cables match the unbalanced winding of the balun. The balanced winding of the balun must be 100 Ω (North Hills 0301BB) in order to match the reference impedance indicated in the standards. The center tap on the balanced side is usually connected to the shielding of the balun through one of the mounting screws.

The transmitter and receiver could be the transmitting and receiving sections of a network analyzer.

Transformers and cables introduce errors of attenuation and phase. For accurate measurements, first perform calibration (normalization) by replacing the simulator with a direct connection.

! Caution: The use of unbalanced signals through the DLS-6900AWGN will usually give incorrect measurements.

Common ErrorsThere are three common errors:

• Coupling between input and output by means of the two transformers. When trying to measure attenuations of 60 dB or so, approximately 1/1000 of the input voltage, or 1/1,000,000 of the input power is present on the output. It is very easy for transformers (or even wires) placed close to each other to couple together far more than this. Take care to keep inputs and outputs separate.

• The use of a high-impedance measuring device with no load from tip to ring at the receive end. This results in reflections due to a bad mismatch at the end of the line, and leads to very peculiar response curves.


Appendix A: Measurements and Test ResultsElectrical Characteristics Test Results

• Ground injected directly onto the tip or ring of the DLS-6900AWGN. This almost always leads to a very noisy spectrum, with high background noise levels and often harmonically related spectrum "spikes."

Electrical Characteristics Test ResultsThe following graphs show the test results for the DLS-6900AWGN vs. theoretical calculated values.

Figure A-2. Insertion Loss for 26 AWG Cable Model (250 ft to 2,000 ft)

Insertion Loss (dB) DLS-6900 vs 26AWG Cable Model

-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 5000000 10000000 15000000 20000000 25000000 30000000

Frequency (Hz)

DLS-6900 250 ft26AWG 250 ftDLS-6900 500 ft26AWG 500 ftDLS-6900 750 ft26AWG 750 ftDLS-6900 1000 ft26AWG 1000 ftDLS-6900 1250 ft26AWG 1250 ftDLS-6900 1500 ft26AWG 1500 ftDLS-6900 1750 ft26AWG 1750 ftDLS-6900 2000 ft



Figure A-3. Insertion Loss for 26 AWG Cable Model (1,000 ft to 7,000 ft)


-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 5000000 10000000 15000000 20000000 25000000 30000000

Frequency (Hz)

DLS-6900 1000 ft26AWG 1000 ftDLS-6900 2000 ft26AWG 2000 ftDLS-6900 3000 ft26AWG 3000 ftDLS-6900 4000 ft26AWG 4000 ftDLS-6900 5000 ft26AWG 5000 ftDLS-6900 6000 ft26AWG 6000 ftDLS-6900 7000 ft26AWG 7000 ft



Figure A-4. Insertion Loss for 26 AWG Cable Model (5,000 ft to 20,000 ft)


-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0.00E+00 1.00E+06 2.00E+06 3.00E+06 4.00E+06 5.00E+06

Frequency (Hz)

DLS-6900 5 kft26AWG 5 kftDLS-6900 10 kft26AWG 10 kftDLS-6900 15 kft26AWG 15 kftDLS-6900 20 kft26AWG 20 kft



Figure A-5. Insertion Loss for PE04 Cable Model (100 m to 700 m)

Insertion Loss (dB) DLS-6900 vs PE04 Cable Model

-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 5000000 10000000 15000000 20000000 25000000 30000000

Frequency (Hz)

DLS-6900 100 mPE04 100 mDLS-6900 200 mPE04 200 mDLS-6900 300 mPE04 300 mDLS-6900 400 mPE04 400 mDLS-6900 500 mPE04 500 mDLS-6900 600 mPE04 600 mDLS-6900 700 mPE04 700 m



Figure A-6. Insertion Loss for PE04 Cable Model (500 m to 2,000 m)


-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 5000000 10000000 15000000 20000000 25000000 30000000

Frequency (Hz)

DLS-6900 500 mPE04 500 mDLS-6900 1000 mPE04 1000 mDLS-6900 1500 mPE04 1500 mDLS-6900 2000 mPE04 2000 m



Figure A-7. Insertion Loss for PE04 Cable Model (1,000 m to 7,000 m)


-80

-75

-70

-65

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0 1000000 2000000 3000000 4000000 5000000

Frequency (Hz)

DLS-6900 1 kmPE04 1 kmDLS-6900 2 kmPE04 2 kmDLS-6900 3 kmPE04 3 kmDLS-6900 4 kmPE04 4 kmDLS-6900 5 kmPE04 5 kmDLS-6900 6 kmPE04 6 kmDLS-6900 7 kmPE04 7 km



Figure A-8. Injected White Noise for 26 AWG Cable Model (21,000 ft)

Injected White Noise (dBm/Hz) Measured for 21 kft 26AWG

Averaging Factor = 100

-150.00

-140.00

-130.00

-120.00

-110.00

-100.00

-90.00

-80.00

0.00E+00 5.00E+06 1.00E+07 1.50E+07 2.00E+07 2.50E+07 3.00E+07

Frequency (Hz)

-90-100-110-120-130-140



Figure A-9. Injected White Noise for PE04 Cable Model (7,000 m)

Injected White Noise (dBm/Hz) Measured for 7 km PE04 Averaging Factor = 100

-150.00

-140.00

-130.00

-120.00

-110.00

-100.00

-90.00

-80.00

0.00E+00 5.00E+06 1.00E+07 1.50E+07 2.00E+07 2.50E+07 3.00E+07

Frequency (Hz)

-90-100-110-120-130-140


Appendix B

Background Noise Measurement Considerations

Background noise measurements for the DLS-6900AWGN are performed with a spectrum analyzer (in this case, an Agilent 4395A spectrum/network analyzer).

Input A is used in spectrum-noise mode and the results are displayed in power spectral density units (dBm/Hz).

The noise floor of the Agilent 4395A with an input attenuator of 0 dB and resolution bandwidth of 30 kHz (input A not connected) is illustrated in Figure B-1.

Figure B-1. Agilent 4395A Noise Floor

Figure B-1 demonstrates the Agilent 4395A spectrum/network analyzer’s Noise Floor over a Bandwidth of 0 to 30 MHz. The graph shows that for frequencies up to 10 MHz, the noise floor is about -144 dBm/Hz. For frequencies in the range of 10 to 30 MHz, the noise floor is about -151 dBm/Hz. Hence, when measuring noise with values close to the noise floor of the analyzer itself, results are inaccurate in the sense that the analyzer’s noise adds to the noise of the device under test (DUT), with the result that the displayed result will be worse than the real one.

Note: The error introduced by the analyzer itself has to be taken into consideration when measuring noise approaching -140 dBm/Hz.



Appendix C

Specifications

The specifications for the DLS-6900AWGN are listed in Table C-1.

Table C-1. DLS-6900AWGN System Specifications

Item Specification

Electrical Specifications

Type of simulated cables 26 AWG and PE04 (one at a time)

Cable Models 26 AWG as per ANSI T1.417PE04 as per ETSI TS 101 388

Number of Lines Single line

Cable Length 26 AWG (0-21kft) 250 ft increments, PE04 mm (0-7km) 100 m increments

AWGN (White Noise), injected at both sides simultaneously (Side A and Side B)

-140 dBm/Hz to -90 dBm/Hz in 0.25 dB increments (ON or OFF)

Bandwidth DC to 30 MHz.

DC Nominal Loop Voltage 50 VDC Tip-to-Ring

DC Loop Current 135 mA maximum

Attenuation (Insertion Loss) Accuracy

Mean Absolute Error (MAE) Typically ≤ 1dB (50 KHz to 30 MHz) simulation vs theory

For distances of 0 to 15,000 ft. (26 AWG), orFor distances of 0 to 4500 m (PE04)

Usable attenuation range 0 to –80 dB

Impedance Accuracy Typically ± 10% (50 kHz - 30 MHz), with respect to characteristic impedance. Input impedance is not affected by the noise injection circuit.


Appendix C: Specifications

Front Panel Display 2-row, 24-character LCD display

Control Remote control via RS-232, manual control via front panel

Connections RJ-45 jacks side A and side B

Power Supply External AC to DC power adapter, 100 – 240 VAC, 50/60 Hz, provided with the unit

Nominal voltage = 18 VMaximum current = 1000 mA

Environmental Specifications

Operating Temperature +10ºC to +40ºC (50ºF to 104ºF)

Storage Temperature -20ºC to +70ºC (-4ºF to 158ºF)

Humidity 90% (non-condensing) max

Mechanical Specifications1

Weight per chassis 6.5 kg/14.3 lbs per chassis

Dimensions per chassis2 89H x 432W x 333 mmD (3.5"H x 17"W x 13.1"D) (2U height).

1 DLS-6900AWGN comes complete with rackmount brackets2 These dimensions do not include the rackmount brackets.

Table C-1. DLS-6900AWGN System Specifications

Item Specification


Appendix D

Safety Information and Instructions

In this appendix . . .

• Safety Information . . . . 66

• Safety Instructions . . . . 67


Appendix D: Safety Information and InstructionsSafety Information

Safety InformationThis section desscribes important safety information. If you have questions about this material, contact Spirent Communications Customer Support (see page 9) before using the equipment.

Protective Grounding (Earthing)

This unit consists of an exposed metal chassis that is connected directly to ground (earth) via a power cord. The symbol used to indicate a protective grounding conductor terminal in the equipment is shown under “Symbols” on page 68.

Before Operating the Unit

• Inspect the equipment for any signs of damage, and read this manual thoroughly.

• Become familiar with all safety symbols and instructions in this manual to ensure that the equipment is used and maintained safely.

Fuse Configuration

There are no fuses used in the unit. A non-replaceable thermal fuse is used in the supplied AC/DC adapter.

Connections to a Power Supply

In accordance with international safety standards, the unit uses an approved AC/DC adapter.

AC Power

100 - 240 VAC, 50-60 Hz at a maximum input current of 700 mA. The appropriate power cord has to be used for each country.

DC Power

DC used by the unit must be 18 V. Note that the polarity of the DC Plug is that the inner conductor is positive (+) and the outer conductor is negative (-). See symbols in the Safety section. The maximum current draw is 1000 mA.

Note: When connecting the DC cable input into the power jack at the back of the DLS-6900AWGN, ensure that the DC power cable is positioned so that it is not difficult to remove and there are no obstructions present that would prevent its removal.


Appendix D: Safety Information and InstructionsSafety Instructions

Operating Environment

To prevent potential fire or shock hazard, do not expose the equipment to any source of excessive moisture.

Class of Equipment

The unit consists of an exposed metal chassis that is connected directly to earth via the protective grounding conductor. in accordance with the HARMONIZED EUROPEAN STANDARD EN 61010-1 1993, it is classified as a Safety Class 1 equipment.

Warning: This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

Safety InstructionsThe following safety instructions must be observed whenever the unit is operated, serviced, or repaired. Failing to comply with any of these instructions or with any precaution or warning contained in this user guide is in direct violation of the standards of design, manufacture, and intended use of the equipment.

Spirent Communications assumes no liability for the customer’s failure to comply with any of these requirements.

Before Operating the Unit• Inspect the equipment for any signs of damage, and read the operating manual

thoroughly.• Install the equipment as specified in the relevant sections of this manual.

• Ensure that the equipment and any devices or cords connected to it are properly grounded.

Operating the Unit • Do not operate the equipment when its covers or panels have been removed.

• Do not operate equipment if an interruption to the protective grounding is suspected. Ensure that the instrument remains inoperative.

• Unless absolutely necessary, do not attempt to adjust or perform any maintenance or repair procedure when the equipment is opened and connected to a power source at the same time. Any such procedure should only be performed by qualified service professional.

• Disconnect the power supply cord from the equipment before adding or removing any components.

• Operating the equipment in the presence of flammable gases or fumes is extremely hazardous.


Appendix D: Safety Information and InstructionsSafety Instructions

• Do not perform any operating or maintenance procedure that is not described in this manual.

• Some of the equipment’s capacitors may be charged even when the equipment is not connected to the power source.

Symbols

The meanings of the symbols that may appear on the DLS-6900AWGN are shown in Figure D-1.

Figure D-1. Equipment Symbols

EQUIPOTENTIALITY–FUNCTIONALEARTH TERMINAL

PROTECTIVE GROUNDINGCONDUCTOR TERMINAL

CAUTION - REFER TO ACCOMPANYING DOCUMENTS


Appendix E

ESD Requirements

Spirent Communications manufactures and sells products that require industry standard precautions to protect against damage from electrostatic discharge (ESD). This document explains the proper process for handling and storing electrostatic discharge sensitive (ESDS) devices, assemblies, and equipment.

The requirements presented in this document comply with the EIA Standard, ANSI/ESD S20.20-1999: Development of an Electrostatic Discharge Control Program, and apply to anyone who handles equipment that is sensitive to electrostatic discharge. Such equipment includes, but it not limited to:

• All electronic assemblies manufactured by Spirent Communications

• Discrete and integrated circuit semiconductors

• Hybrid microcircuits

• Thin film passive devices

• Memory modules

! Caution: Failure to comply with the requirements explained in this document poses risks to the performance of ESDS devices, as well as to your investment in the equipment.

General Equipment Handling

Whenever you handle a piece of ESDS equipment, you must be properly grounded to avoid harming the equipment. Also, when transporting the equipment, it must be packaged properly. Follow the requirements below to help ensure equipment protection.

• Wrist straps must be worn by any person handling the equipment to provide normal grounding.

• The use of foot straps is encouraged to supplement normal grounding. If foot straps are used exclusively, two straps (one on each foot) should be used. Note that foot straps are only applicable in environments that use ESD flooring and/or floor mats.

• Hold ESDS equipment by the edges only; do not touch the electronic components or gold connectors.

• When transporting equipment between ESD protected work areas, the equipment must be contained in ESD protective packaging. Equipment that is received in ESD


Appendix E: ESD Requirements

protective packaging must be opened either by a person who is properly grounded or at an ESD protected workstation.

• Any racks or carts used for the temporary storage or transport of ESDS equipment must be grounded either by drag chains or through direct connection to earth ground. Loose parts that are not protected by ESD-safe packaging must not be transported on carts.

Workstation Preparation

The ideal setup for working with ESDS equipment is a workstation designed specifically for that purpose. Figure E-1 illustrates an ESD protected workstation. Please follow the requirements listed below to prepare a proper ESD protected workstation.

• The ESD Ground must be the equipment earth ground. Equipment earth ground is the electrical ground (green) wire at the receptacles.

• An ESD protected workstation consists of a table or workbench with a static dissipative surface or mat that is connected to earth ground. A resistor in the grounding wire is optional, providing that surface resistance to ground is ≥ 105 to ≤ 109 Ω.

• The workstation must provide for the connection of a wrist strap. The wrist strap must contain a current limiting resistor with a value from ≥ 250K Ω to ≤ 10M Ω.

• ESD protective flooring or floor mats are required when floor-grounding devices (foot straps/footwear) are used or when it is necessary to move in between ESD protected workstations when handling ESDS equipment.

Figure E-1. ESD Protected Workstation

Note: The equipment needed for proper grounding is available in ESD service kits, such as the ESD Field Service Kit available from Spirent Communications (P/N 170-1800). Additional information on ESD can be found on the following website: http://www.esda.org/aboutesd.html

ESD protective surface or matOptional resistor

Wrist strap

ESD protective floor mat (optional)


http://www.esda.org/aboutesd.html

Index

Symbols*CLS 45*ESR? 45*IDN? 45*PSC 46*RST 46*TST? 46

BBackground Noise Measurement

Considerations 61

Ccabling requirements 17command syntax 40commands

clear status (*CLS) 45device dependent 41event status register query (*ESR) 45identification query (*IDN) 45power-on status clear (*PSC) 46reset (*RST) 46self-test query (*TST) 46setting channel gauge 42setting channel length 42source noise level 42source noise state 42system calibration date 42system calibration expiry 43system lock ON/OFF 43

communication problems 50configuring the workspace 29connecting to power 22connectors, DUT 19contacting Spirent 9

Ddisplay, LCD 21DLS-6900

communicating with 28example test setup 13front panel 12, 18rear panel 22setting up and testing 17

DUT connectors 19

Eelectrostatic discharge 8

equipment handlingESD service kits 70preparing your workstation 70

equipment handling guidelines 69ESD requirements 69

Hhardware

handling 8

Kknob

LOOP/NOISE adjustment 20

LLCD display 21LEDs

power indicator 21power LED indication 50remote indicator 21remote LED indication 50

loop length 20

Mmeasurements and test results 51message terminators 39

Nnoise level 20

Ppackage contents 16Power 46power, connecting to 22problems, communication 50

Rremote control 23requirements

electrostatic discharge 69requirements, cabling 17returning the product 16RS-232 serial interface 38

Ssafety information and instructions 65serial interface, RS-232 38


Index

settings, loading and saving 36simulation, wireline 12software

controlling 30installing and running 26

specifications 63status reporting 47switch

loop length/noise level 20noise ON/OFF 20wireline type 20

syntax. command 40

Uunpacking 16

Wwireline simulation 12workspace, configuring 29workspace, using 32workstation preparation 70


Documents

User Guide DLS-6900AWGN Single-Line Multi-Gauge Production ... · About this Guide Introduction 8 | DLS-6900AWGN User Guide Introduction This DLS-6900AWGN User Guide describes the