DSAM_Field_View__QAM_Quick_Guide_EN.PDF

DSAM Field View QAM™ Guide

Reference WEBSITE: www.jdsu.com/test

Notice Every effort was made to ensure that the information in this document was accurate at the time of printing. However, information is subject to change without notice, and JDSU reserves the right to update this document with information not available at the time that this document was created.

Copyright © Copyright 2012 JDS Uniphase Corporation (JDSU). All rights Reserved.

JDSU, Enabling Broadband and Optical Innovation, Test and Measurement Solutions, and JDSU logos are trademarks of JDS Uniphase Corporation ("JDS Uniphase"). All other trademarks and registered trademarks are the property of their respective owners. No part of this guide may be reproduced or transmitted electronically or otherwise without written permission of the publisher.

Trademarks JDSU and Field View QAM™ are trademarks or registered trademarks of JDSU in the United States and/or other countries.

Microsoft, Windows, Windows CE, Windows NT, and Microsoft Internet Explorer are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries.

Specifications, terms, and conditions are subject to change without notice. All trademarks and registered trademarks are the property of their respective companies.

WEEE DirectiveCompliance

JDSU has established processes in compliance with the Waste Elec-trical and Electronic Equipment (WEEE) Directive, 2002/96/EC.

This product should not be disposed of as unsorted municipal waste and should be collected separately and disposed of according to your national regulations. In the European Union, all equipment purchased from JDSU after 2005-08-13 can be returned for disposal at the end of its useful life. JDSU will ensure that all waste equipment returned is reused, recycled, or disposed of in an environmentally friendly manner, and in compliance with all applicable national and interna-tional waste legislation.

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It is the responsibility of the equipment owner to return the equipment to JDSU for appropriate disposal. If the equipment was imported by a reseller whose name or logo is marked on the equipment, then the owner should return the equipment directly to the reseller.

Instructions for returning waste equipment to JDSU can be found in the Environmental section of JDSU’s web site at www.jdsu.com. If you have questions concerning disposal of your equipment, contact JDSU’s WEEE Program Management team at [email protected].

ii DSAM Field View QAM Guide Rev. 001

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Table of Contents

Field View QAM™ Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Field View QAM™ - Troubleshooting with Field View QAM™ . . 2DSAM Field View QAM™- Example of Detected Problems . . . . . 8

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Table of Contents

iv DSAM Field View QAM Guide Rev. 000

DSAM Field View QAM GuideField View QAM™ Overview

Field View QAM™ OverviewLocate and Repair hard-to-find impairments on the Return Path. Tradi-tional spectrum analysis tools can show a clean spectrum, indicating pristine return path, while the CMTS and other reporting tools give overall node health a low health score. With Field View QAM™ micro-reflections, in-band frequency response and group delay issues that are undetectable when viewing only the spectrum can be quickly iden-tified.

A DSAMXT with Field View QAM™ can display an impairment dash-board with key measurements displayed in green and red providing a quick go/no-go indicator to technicians, confirming whether issues causing codeword errors such as microreflections and impulse noise have been fixed. 3

9

Figure 1 Impairments Invisible with Spectrum Analysis

Figure 2 Same Impairments Visible with Field View QAM

Rev. 001 DSAM Field View QAM Guide 1

DSAM Field View QAM GuideField View QAM™ - Troubleshooting with Field View QAM™

Field View QAM™ - Troubleshooting with Field View QAM™

1 Press the Measure hard key on the DSAM keypad.

2 Press the Service softkey

3 Got to Field View QAM™

4 Enter

5 If you have multiple DOCSIS Channels available to test you will be asked to select a DOCSIS Channel

6 Select a DOCSIS channel that you want to troubleshoot

7 Press Next>

Figure 3

Figure 4

2 DSAM Field View QAM Guide Rev. 001


8 Press Start>

9 Select a PathTrak WebView Server

10 Ok

11 Select an HCU

12 Ok

13 Select a Node

14 Ok

15 Select an upstream

16 Ok

Figure 5

Figure 6



Figure 7

Figure 8 Initial FVQ Screen



17 Select Carrier Level

18 Enter

19 Press the Back softkey

20 Using the down arrow key, select In-Band Response

21 Go Back

Figure 9 Carrier Level

Figure 10 In-Band Response



22 Select Ingress Under Carrier

23 Back

24 Using the arrow keys, select Micro-reflection

25 Back

Figure 11 Ingress Under Carrier

Figure 12 Micro-reflection



26 Select Group Delay

27 Back

28 Select Impulse Noise

Figure 13 Group Delay

Figure 14 Impulse Noise


DSAM Field View QAM GuideDSAM Field View QAM™- Example of Detected Problems

DSAM Field View QAM™- Example of Detected Problems

Figure 15 Bad Packets

Figure 16 Bad Packets (In-Band Response)

Figure 17 Bad In-Band Response



Figure 18 Bad Group Delay


Test and Measurement Regional Sales

North AmericaToll Free: 1 800 638 2049Tel: +1 240 404 2999Fax:+1 240 404 2195

Latin AmericaTel: 954-688-5660Fax:954-846-8856

Asia PacificTel: +852 2892 0990Fax:+852 2892 0770

EMEATel: +49 7121 86 2222Fax:+49 7121 86 1222

www.jdsu.com

DSAM Field View QAM™ December 2012

DSAM_Field_View__QAM_Quick_Guide_EN.PDF

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