Atec DSP-2000 User Manual

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DSP-100/2000

LAN CableMeter®/Cable Analyzer

PN 642964 January 1997

Users Manual

LIMITED WARRANTY & LIMITATI O N OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on t he date of shipment. Parts, product repai rs and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries or to any product which, in Fluke’s opinion, has been misused, altered, negl ected or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operat e substantially in accordance with it s functional specifications for 90 days and that it has been properly recorded on non-def ective media. Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers onl y but have no authority to extend a greater or di f ferent warranty on behalf of Fluke. Warrant y support is available if product is purchased through a Fluke authorized sales out l et or Buyer has paid the applicable internati onal pri ce. Fluke reserves the right to invoice Buyer f or i m portation costs of repair/replacement part s when product purchased in one country is submitted f or repai r i n another country.

Fluke’s warranty obligation is l i mited, at Fluke’s option, t o refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fl uke aut hori zed servi ce center or send the product, with a description of the difficult y, postage and insurance prepaid (FOB Destination), t o the nearest Fluke authorized service center. Fluke ass umes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determ i nes that the failure was caused by misuse, alteration, accident or abnormal condition of operation or handling, Fluke will provide an estimate of repair costs and obtain authorization bef ore c ommencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitat i ons and exclusions of this warranty m ay not apply to every buyer. If any provision of t hi s Warranty is held invalid or unenforceable by a court of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation Fluke Europe B.V. P.O. Box 9090 P.O. Box 1186 Everett, WA 98206-9090 5602 BD Eindhoven U.S.A. The Netherlands

5/94

Chapter Page

1 Introduction...................................................................................... 1-1

Overview of Features...................................................................................... 1-1

Standard Accessories ...................................................................................... 1-3

Using This Manual.......................................................................................... 1-5

2 Getting Started................................................................................. 2-1

W Safety and Operational Information.......................................................... 2-1

Quick Start....................................................................................................... 2-3

Quick Configuration........................................................................................ 2-4

Results within Accuracy Range...................................................................... 2-6

Autotest on Twisted Pair Cable ...................................................................... 2-7

Autotest on Coaxial Cable .............................................................................. 2-10

Main Unit Features.......................................................................................... 2-12

Remote Features.............................................................................................. 2-14

Strap and Bail.................................................................................................. 2-16

Rotary Switch.................................................................................................. 2-16

Turning On the Test Tool................................................................................ 2-20

Configuring the Test Tool............................................................................... 2-22

Remote Lights, Messages, and Audible Tones............................................... 2-29

Remote End Testing........................................................................................ 2-30

Remote Communication Error........................................................................ 2-31

Battery Status.................................................................................................. 2-31

3 Autotest............................................................................................ 3-1

Autotest Softkeys............................................................................................ 3-1

Autotest on Twisted Pair Cable ...................................................................... 3-2

Link Performance Grade Result (Headroom)................................................. 3-4

Automatic Diagnostics (Model DSP-2000).................................................... 3-4

Autotest Results for Twisted Pair Cable......................................................... 3-6

DSP-100/2000

Users Manual

Autotest on Coaxial Cable.............................................................................. 3-19

Autotest Results for Coaxial Cable ................................................................ 3-21

Saving Autotest Results.................................................................................. 3-23

The Autotest Report........................................................................................ 3-25

4 Running Individual Tests ................................................................ 4-1

Single Tests for Twisted Pair Cable............................................................... 4-1

Scanning Function.......................................................................................... 4-2

When to Use a Remote Unit........................................................................... 4-2

The TDX Analyzer ......................................................................................... 4-6

The TDR Test ................................................................................................. 4-9

Single Test Results for Twisted Pair Cable.................................................... 4-12

Single Tests for Coaxial Cable....................................................................... 4-14

Monitoring Network Activity......................................................................... 4-16

Identifying Hub Port Connections.................................................................. 4-20

Monitoring Impulse Noise.............................................................................. 4-20

Determining Hub Port Capabilities (Model DSP-2000)................................. 4-23

Using the Tone Generator (Model DSP-2000)............................................... 4-24

5 Viewing and Printing Saved Reports.............................................. 5-1

Printing Test Reports...................................................................................... 5-1

Viewing, Renaming, and Deleting Test Reports............................................ 5-6

6 Calibrations and Custom Test Standards...................................... 6-1

Calibrating the Test Tool................................................................................ 6-1

NVP Calibration ............................................................................................. 6-3

Configuring a Custom Cable.......................................................................... 6-4

7 Basic Cable Testing......................................................................... 7-1

LAN Cable Construction................................................................................ 7-1

Attenuation ..................................................................................................... 7-5

Noise .............................................................................................................. 7-6

Characteristic Impedance................................................................................ 7-7

Crosstalk and Near-End Crosstalk (NEXT) ................................................... 7-9

Nominal Velocity of Propagation (NVP)....................................................... 7-14

Time Domain Reflectometry (TDR)............................................................... 7-15

ACR .............................................................................................................. 7-19

RL .............................................................................................................. 7-20

Troubleshooting Basics .................................................................................. 7-21

8 Maintenance and Specifications..................................................... 8-1

Maintenance.................................................................................................... 8-1

If the Test Tool Fails ...................................................................................... 8-4

Specifications.................................................................................................. 8-7

Contents

(continued)

Appendices

A Using DSP-LINK ................................................................................. A-1

B Glossary................................................................................................ B-1

C Tests Run per Test Standard During an Autotest................................. C-1

Index

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DSP-100/2000

Users Manual

List of Tables

Table Page

2-1. International Electrical Symbols................................................................. 2-1

2-2. Key Functions for the Menu System .......................................................... 2-3

2-3. Quick Configuration Settings..................................................................... 2-4

2-4. Main Unit Features ..................................................................................... 2-13

2-5. Remote Connectors and Features ............................................................... 2-15

2-6. Status Indications from Remotes................................................................ 2-29

2-7. Battery Status Messages ............................................................................. 2-31

3-1. Wire Map Displays..................................................................................... 3-6

3-2. Items on the Attenuation Results Screen.................................................... 3-10

3-3. Items on the Attenuation Plot Screen ......................................................... 3-11

3-4. Items on the NEXT Results Screen ............................................................ 3-12

3-5. Items on the NEXT Plot Screen.................................................................. 3-13

3-6. Items on the ACR Results Screen............................................................... 3-15

3-7. Items on the ACR Plot Screen.................................................................... 3-16

3-8. Items on the RL Results Screen.................................................................. 3-17

3-9. Items on the RL Plot Screen....................................................................... 3-18

3-10. Items on the Autotest Save Screen.............................................................. 3-24

4-1. Remote Requirements for Cable Tests....................................................... 4-3

4-2. Items on the TDX Analyzer Results Screen............................................... 4-7

4-3. Items on a TDX Analyzer Plot.................................................................... 4-8

4-4. Effects of Termination on TDR Results..................................................... 4-9

4-5. Items on the TDR Results Screen (Twisted Pair Results).......................... 4-11

4-6. Items on the TDR Plot (Twisted Pair Results) ........................................... 4-12

4-7. Items on the Traffic Monitor Screen........................................................... 4-19

4-8. Items on the Noise Monitor Screen ............................................................ 4-23

7-1. Identifying Cable Faults.............................................................................. 7-22

8-1. Troubleshooting the Test Tool.................................................................... 8-5

8-2. Replacement Parts....................................................................................... 8-6

8-3. Characteristic Impedance Test Specifications............................................ 8-8

8-4. Length Test Specifications ......................................................................... 8-9

8-5. Length Test Specifications ......................................................................... 8-9

DSP-100/2000

Users Manual

8-6. Distance Specifications for TDR Test........................................................ 8-11

8-7. PC Interface Cable Connections................................................................. 8-13

8-8. 9-to 25-pin Adapter.................................................................................... 8-13

8-9. Certifications.............................................................................................. 8-16

A-1. Summary of DSP-LINK Functions ............................................................ A-5

A-2. Special Terms Used in DSP-LINK............................................................. A-6

A-3. Formats for Uploaded Reports................................................................... A-7

C-1. Tests Run per Test Standard During an Autotest....................................... C-2

List of Figures

Figure Page

1-1. Standard Accessories.................................................................................. 1-4

2-1. The Asterisk and Test Tool Accuracy ........................................................ 2-6

2-2. Autotest Connections for Twisted Pair Cable (Channel) ........................... 2-8

2-3. Autotest Connections for Coaxial Cable .................................................... 2-11

2-4. Main Unit Features ..................................................................................... 2-12

2-5. Standard and Smart Remote Features......................................................... 2-14

2-6. Attaching the Strap and Opening the Bail.................................................. 2-16

3-1. Autotest Connections for Twisted Pair Cable (Basic Link)....................... 3-2

3-2. Examples of Automatic Diagnostics Displays............................................ 3-5

3-3. The Attenuation Plot Screen....................................................................... 3-11

3-4. The NEXT Plot Screen ............................................................................... 3-13

3-5. The ACR Plot Screen.................................................................................. 3-16

3-6. The RL Plot Screen..................................................................................... 3-18

3-7. Autotest Connections for Coaxial Cable .................................................... 3-21

3-8. Screen for Saving Autotest Results ............................................................ 3-24

3-9. Part of an Autotest Report for Twisted Pair ............................................... 3-26

3-10. Autotest Report for Coaxial Cable ............................................................. 3-27

3-11. Autotest Report Summary........................................................................... 3-27

4-1. Single Test Connections for Twisted Pair Cable........................................ 4-4

4-3. Example of a TDX Analyzer Plot for a Good Twisted Pair Cable Run..... 4-8

4-3. Example of a TDR Plot (Twisted Pair Results).......................................... 4-12

4-4. Single Test Connections for Coaxial Cable................................................ 4-15

4-5. Connections for Monitoring Network Traffic ............................................ 4-17

4-6. Connections for Monitoring Impulse Noise............................................... 4-21

5-1. Connections for Printing Test Reports ....................................................... 5-3

6-1. Connections for Self-Calibration (Smart Remote Shown)......................... 6-2

7-1. Twisted Pair Cable Construction................................................................ 7-2

7-2. EIA/TIA RJ45 Connections........................................................................ 7-3

7-3. Coaxial Cable Construction........................................................................ 7-4

7-4. Attenuation of a Signal............................................................................... 7-5

7-5. Sources of Electrical Noise......................................................................... 7-6

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DSP-100/2000

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7-6. A TDX Analyzer Plot................................................................................. 7-10

7-7. Split Pair Wiring......................................................................................... 7-12

7-8. How NVP is Calculated ............................................................................. 7-14

7-9. Signals Reflected from an Open, Shorted, and Terminated Cable............. 7-16

7-10. Example of a TDR Plot.............................................................................. 7-18

7-11. A Plot of NEXT, Attenuation, and the Resulting ACR ............................. 7-20

8-1. Removing the Battery in the Standard Remote.......................................... 8-2

8-2. Removing the NiCad Battery Pack............................................................. 8-3

8-3. Operating Environment Specifications ...................................................... 8-15

A-1. Connecting the Test Tool to a PC .............................................................. A-3

viii

Chapter 1 provides the following information:

• Features of the DSP-100 and DSP-2000 test tools.

• A list of equipment included with the test tools.

• A guide to using this manual.

Overview of Features

The Fluke DSP-100 LAN CableMeter® and DSP-2000 LAN Cable Analyzer test

tools (hereafter referred to collectively as “the test tool”) are hand-held instruments used to certify cable and to test and troubleshoot coaxial and twisted pair cable in local area network (LAN) installations. The test tool features new measurement technology that combines test pulses with digital signal processing to provide fast, accurate results and advanced testing capabilities.

Chapter 1

Introduction

The test tool includes the following features:

• Checks LAN cable performance against IEEE, ANSI, TIA, and ISO/IEC

standards.

• Presents test options and results in a simple menu system.

• Presents displays and printed reports in English, German, French, Spanish, or

Italian.

• Runs all critical tests automatically.

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DSP-100/2000

Users Manual

• Produces 2-way Autotest results in approximately 20 seconds.

• Includes a stored library of common test standards and cable types.

• Allows for configuration of up to 4 custom test standards.

• Time Domain Crosstalk (TDX) analyzer locates the position of crosstalk

(NEXT) problems on a cable.

• Tests for return loss (RL).

• Produces plots of NEXT, attenuation, ACR, and RL. Shows NEXT, ACR, and

attenuation results up to 155 MHz.

• Stores at least 500 cable test results in nonvolatile memory.

• Monitors impulse noise and network traffic on Ethernet systems. Hub port

locator helps you identify port connections.

• Sends stored test reports to a host computer or directly to a serial printer.

• Flash EPROM accepts test standard and software upgrades.

• Tests fiber optic cable when used with a Fluke DSP Fiber Optic Meter.

Model DSP-2000 includes the following additional features:

• Monitors 100BaseTX network traffic.

• Diagnostic routine provides specific information about the location and cause

of an Autotest failure.

• Tests for remote return loss (RL@REMOTE) and power sum NEXT

(PSNEXT).

• Determines which standards are supported by a hub port connection.

• Tone generator lets you use an inductive pickup device to identify cables in a

LAN installation.

1-2

Standard Accessories

The test tool comes with the following accessories, which are shown in Figure 1-1. If the test tool is damaged or something is missing, contact the place of purchase immediately.

1 AC/adapter/charger (2 with smart remote package) 120V (US only) or universal adapter/charger and line cord (outside North America)

2 RJ45 2m (6.6 ft), 100Ω, straight-through patch cables

1 RJ45 15 cm (6”), 100Ω, straight-through patch cable 1 50Ω BNC coaxial cable 1 RJ45 to BNC adapter (Model DSP-2000 only) 1 PC serial interface (EIA-232C) cable 1 Carrying strap (2 with smart remote package) 1 3.5” DSP-LINK utility diskette 1 Users manual (not shown) 1 Warranty registration card (not shown) 1 Soft carrying case for Model DSP-100 (2 with smart remote package, not shown.

Discard loose foam pieces.) 1 Smart remote unit with Model DSP-2000 (not shown) 1 Hard carrying case with Model DSP-2000 (not shown)

Introduction

Standard Accessories

1-3

DSP-100/2000

Users Manual

Straight Through

15 cm (1)

RJ45

Patch

2m (2)

RS-232 Cable

Strap

Coaxial

Cable

RJ45 to BNC Adapter

(DSP-2000 Only)

DSP-Link Software

3.5-Inch Floppy Disk

BP7217

Nickel-Cadmium

Battery Pack

1-4

AC Adapter/Charger

gc01f.eps

Figure 1-1. Standard Accessories

Using This Manual

Before using the test tool, careful ly read "Safety and Operational Information" at the beginning of Chapter 2.

If you are familiar with the general features, functions, and operation of LAN cable testers and want to start testing cables immediately, proceed as follows:

1. Read “Quick Start” in Chapter 2 to prepare the test tool for operation, access

the test tool’s functions, and run an Autotest.

2. Refer to the test and setup features listed under “Rotary Switch” in Chapter 2

to locate functions in the test tool’s menu structure.

3. Refer to Appendix B, “Glossary,” to find definitions for unfamiliar terms. If you have never used a LAN cable tester, but want to start testing cables

immediately and learn as you work, proceed as follows:

1. Read “Quick Start” in Chapter 2 to prepare the test tool for operation, access

the test tool’s functions, and run an Autotest.

2. Refer to Appendix B, “Glossary,” to find definitions for unfamiliar terms.

WWarning

Introduction

Using This Manual

3. Refer to the test and setup features listed under “Rotary Switch” in Chapter 2

to locate functions in the test tool’s menu structure.

4. Refer to Chapter 3, “Autotest,” to find more detailed information about cable

tests and test results.”

5. Read Chapter 4, “Running Individual Tests,” to learn how to run individual

tests and monitor network traffic and impulse noise.

6. Read Chapter 7, “Basic Cable Testing,” to add to your cable testing and

troubleshooting knowledge.

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DSP-100/2000

Users Manual

If you have never used a LAN cable tester and want to learn about cable testing and troubleshooting before you use the test tool, proceed as follows:

1. Read Chapter 7, “Basic Cable Testing,” to learn the basics of LAN cable

characteristics, testing, and interpreting test results.

2. Read “Features” in Chapter 2 to familiarize yourself with the test tool.

3. Read “Getting Started” in Chapter 2 to learn how to prepare the test tool for

use.

4. Read Chapter 3, “Autotest,” to learn how to run the most commonly used

cable test and interpret the test results.

5. Read Chapter 4, “Running Individual Tests,” to learn how to run individual

tests and monitor network traffic and impulse noise.

6. Refer to the test and setup features listed under “Rotary Switch” in Chapter 2

to locate functions in the test tool’s menu structure.

7. Refer to Appendix B, “Glossary,” to find definitions for unfamiliar terms.

1-6

Chapter 2

Getting Started

Chapter 2 provides the following information:

• Safety and cautions to observe when using the test tool.

• Instructions for getting started quickly with the test tool.

• Detailed information on the test tool’s features.

• Detailed instructions on configuring the test tool.

Safety and Operational Information

The international electrical symbols used on the instrument or in this manual are described in Table 2-1.

Table 2-1. International Electrical Symbols

Warning: Risk of electric shock.

Warning or Caution: Risk of damage or destruction to equipment or software. See explanations in the manual.

Equipment is protected by double insulation or reinforced insulation to protect the user against electric shock.

Do not connect this terminal to public communications networks, such as telephone systems.

Battery should be recycled. Refer to "R eplacing the NiCad Battery Pack" in Chapter 8.

2-1

DSP-100/2000

Users Manual

XWarning

To avoid possible fire or electric shock w hen chargi ng t he battery or powering the test tool w ith ac power, use only the ac adapter/charger provided with the test t ool.

WCaution

Never connect the test tool to telephone l ines of any type, including ISDN lines. Doing so can damage the test tool.

• Always turn on the test tool before connecting it to a cable. Turning the test

tool on activates the tool’s input protection circuitry.

• Except when monitoring network activity, never connect the test tool to an

active network. Doing so may disrupt network operation.

• When using a coaxial T-connector to connect the test tool to a network, never

allow the T-connector to touch a conductive surface. Such contact may disrupt network operation.

• Never attempt to insert any connector other than an RJ45 connector into the

RJ45 jack. Inserting other connectors, such as RJ11 (telephone) connectors, can permanently damage the jack.

• Never attempt to send data from a PC to the test tool while running a cable

test. Doing so may cause erroneous test results.

• Never operate portable transmitting devices during a cable test. Doing so may

cause erroneous test results.

• Never run tests with cables connected to both test connectors. Doing so may

cause erroneous test results.

• To ensure maximum accuracy of test results, perform the self-calibration

procedure as described in “Calibrating the Test Tool” in Chapter 6.

2-2

Quick Start

This section is for users who want to start using the test tool immediately with minimal instruction. For suggestions on additional reading that may be helpful to

you, see “Using this Manual” in Chapter 1.

Powering the Test Tool

Before powering the test tool or smart remote with the NiCad battery pack, charge the battery for about 3 hours. To charge the battery, connect the ac adapter/charger to the test tool or smart remote and to ac line power. You can operate the unit on ac power while the battery charges. A fully-charged battery typically lasts 10-12 hours. See “Battery Status” on page 2-31 for information on battery status messages.

The ac adapter/charger will not power the test tool when the battery pack is removed.

The standard remote unit is powered by a 9V alkaline battery. The test tool monitors the remote unit and alerts you when the battery voltage is low.

Note

Getting Started

Quick Start

Using the Menus

The test tool’s setup configuration, test selections, and test results are presented in a menu system. Table 2-2 shows the keys used to select items and move between screens in the menu system.

Table 2-2. Key Functions for the Menu System

Key Function

U D L R

E Selects the highlighted item.

T Starts the highlighted test. e Exits the current screen.

Allow up, down, left, and right movement on the display.

Softkeys select the function displayed on the screen area above the key. Softkey functions depend on the screen displayed.

2-3

DSP-100/2000

Users Manual

Quick Configuration

The settings listed in Table 2-3 affect either the display format or the accuracy of your test results. Following the table are instructions for changing the settings. For

a complete list of the test tool’s adjustable settings, refer to the later section “Setup.”

SETUP Setting Description

Table 2-3. Quick Configuration Settings

Test Standard and Cable Type

Average Cable Temperature

Conduit Setting The conduit setting is not applicable to all test standards. Remote End

Testing Length Units Select meters or feet as the unit for length measurements. Numeric Format Select a format (0.00 or 0,00) for display of decimal fractions. Display and Report

Language Power Line Noise

Filter Frequency

Select the test standard and cable type you are using. Your selection determines which test specifications are used and which tests are run during cable testing. Fiber optic cable testing requires a Fluke DSP Fiber Optic Meter.

Select the cable temperature range that includes the average temperature where the cable is installed. Cable temperature is not applicable to all test standards.

Enables execution of the REMOTE tests. Select Disable or Auto Detect when using a standard remote.

Select English, German, French, Spanish, or Italian.

Select the frequency of the ac power in your area. The test tool filters out 50 or 60 Hz noise from measurements.

2-4

Getting Started

Quick Configuration

To change any of the settings shown in Table 2-3, proceed as follows:

1. Turn the rotary switch to SETUP.

2. If the setting you want to change is not on the first Setup screen, press

$Page Down to see additional Setup screens.

3. Use D U to highlight the setting you want to change.

4. Press ! Choice.

5. Use D U to highlight the setting you want.

6. Press E to store the highlighted setting.

7. Repeat steps 2 through 6 to change additional settings.

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DSP-100/2000

Users Manual

Results within Accuracy Range

An asterisk following a test result value indicates that the value is within the test

tool’s range of accuracy, as shown in Figure 2-1. All tests except the wire map test may produce results with an asterisk when the asterisk is required by the selected test standard.

The asterisk appears on displayed and printed test results, but does not appear in comma separated variable (CSV) data uploaded to a PC.

Pass

Pass Region

Fail

Fail Region

Limit

Accuracy Range of Test Tool

2-6

gc02f.eps

Figure 2-1. The Asterisk and Test Tool Accuracy

Autotest on Twisted Pair Cable

Autotest performs all of the tests necessary to determine if the cable you are testing meets the test standards specified for your LAN installation.

The following tests apply to twisted pair cable:

• Wire Map

• Resistance

• Length

• Propagation Delay

• Delay Skew

• Impedance

• NEXT (Near-end Crosstalk)

• Attenuation

• ACR (Attenuation to Crosstalk Ratio)

• RL (Return Loss)

• PSNEXT (Power Sum NEXT; Model DSP-2000 only)

Some test standards require a NEXT measurement from both ends of the cable. If you are using another main unit (Model DSP-100 only) or a smart remote as the remote unit, and you enable remote end testing on the main unit, the Autotest runs the REMOTE tests supported by the test tool if those tests apply to the selected test standard.

Getting Started

Autotest on Twisted Pair Cable

To Autotest twisted pair cable, refer to Figure 2-2 on the next page and proceed as follows:

Note

Standard remote units do not support remote end testing.

Note

If the calibration message appears after you start the Autotest, refer

to “Calibrating the Test Tool” in Chapter 6 for complete calibration instructions.

2-7

DSP-100/2000

Users Manual

DSP-2000

CABLE ANALYZER

Horizontal

Cross Connect Blocks

2 Meters

RJ45

Jacks

Test Tool

Transition

Connector

TEST

FAULT INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

WAKE UP

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Wall

Outlet

2 Meters

DSP-2000SR

PASS

TESTING

FAIL

LOW BATTERY

SMART REMOTE

Smart

Remote

OFF

gc03f.eps

Figure 2-2. Autotest Connections for Twisted Pair Cable (Channel Configuration and Model

DSP-2000 Shown)

2-8

Getting Started

Autotest on Twisted Pair Cable

1. If you are using a DSP-100 main unit as the remote, turn the remote unit’s

rotary switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

2. Use a 2m patch cable of the correct impedance to connect the remote to the far

end of the cable link.

3. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

4. Turn the rotary switch on the main unit to AUTOTEST.

5. Verify that the settings displayed are correct. You can change these settings in

the SETUP mode.

6. Use a 2m patch cable of the correct impedance to connect the test tool to the

near end of the cable link. On Model DSP-2000, connect to the CABLE TEST jack.

7. Press T to start the Autotest.

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DSP-100/2000

Users Manual

Autotest on Coaxial Cable

The following tests are run during an Autotest on coaxial cable:

• Impedance

• Resistance

• Length

• Anomaly detection (Results shown only if anomalies are detected.)

To run an Autotest on coaxial cable, refer to Figure 2-3 and proceed as follows:

1. Turn off any PC nodes connected to the cable you are testing.

2. If you want the Autotest to report cable length, remove the terminator from the

far end of the cable.

3. Turn the rotary switch to AUTOTEST.

4. Verify that the test standard and cable type displayed are correct. You can

change these settings in the SETUP mode.

5. Remove any cable connected to the test tool’s unused RJ45 connector.

6. Remove the terminator from the near end of the coaxial cable and connect the

cable to the BNC connector on the test tool. On Model DSP-2000, use the RJ45 to BNC adapter to connect the cable to the CABLE TEST jack.

2-10

7. Press T to start the Autotest.

Getting Started

Autotest on Coaxial Cable

12345678

For Length Test, remove far-end Terminator

BNC “T”

Connector

CABLE ANALYZER

DSP-2000

Test Tool

TEST

FAULT

INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Figure 2-3. Autotest Connections for Coaxial Cable (Model DSP-2000 Shown)

gc04f.epc

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DSP-100/2000

Users Manual

Main Unit Features

Figure 2-4 shows the features on the main unit and Table 2-4 explains their functions. Features shown in light gray are found on Model DSP-100 only.

DSP-100 DSP-2000

DSP-2000

CABLE ANALYZER

TEST

MONITORCABLE

TEST

FAULT

INFO

EXIT

AUTO TEST

OFF

SINGLE

TEST

ENTER

MONITOR

SETUP

SAVE

WAKE UP

SPECIAL FUNCTIONS

SMART REMOTE

8 9

2-12

gc05f.eps

Figure 2-4. Main Unit Features

Table 2-4. Main Unit Features

Item Feature Description

1 Rotary Switch Selects the test tool’s modes.

2 3

4 5

6 7

8 9 0

! @

Display A LCD display with backlight and adjustable contrast.

L R U D

WAKE UP

RS-232C serial port

AC adapter/ charger jack

AC power indicator

RJ45 connector(s)

BNC connector Model DSP-100 only. A connector for coaxial cable.

Exits the current screen. Model DSP-2000 only. Automatically provides more specific information on

the cause of an Autotest failure. Starts the highlighted test or restarts the test last run.

Provide functions related to the concurrent display. Softkey functions are shown in the display area above the keys.

Allow left, right, up, and down movement on the display. Increase or decrease the numerical values of user-definable parameters.

Saves Autotest results and parameter changes in memory. Selects the highlighted item from a menu. Controls the display backlight. Pressing for 1 second allows adjustment of

the display contrast. Reactivates the test tool when the tool is in power down mode.

A 9-pin connector for interfacing with a printer or host computer via a standard IBM-AT EIA RS-232C serial cable.

Connection for the ac adapter/charger supplied with the test tool.

LED Style 1: A green LED that turns on when the test tool is powered with the ac adapter/charger.

LED Style 2: A multicolor LED with four states:

Off: AC adapter/charger is not connected, or is connected without the battery pack installed.

Blinking Red: The ac adapter/charger is trickle charging the battery in preparation for fast charging. This mode indicates an extremely low battery voltage. The test tool may not operate.

Steady Red: The ac adapter/charger is fast charging the battery. Steady Green: Fast charging is complete. The ac adapter/charger

continues to trickle charge the battery.

A shielded 8-pin jack for shielded and unshielded twisted pair cable. On Model DSP-2000, this jack is labeled CABLE TEST. Model DSP-2000 has an additional RJ45 jack labeled MONITOR, which is used for 10/100BaseTX traffic and hub tests.

Getting Started

Main Unit Features

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Users Manual

Remote Features

Figure 2-5 shows the features on the standard and smart remote units. Table 2-5 explains the functions of these items.

Standard Remote

PASS

TEST

FAIL

Smart Remote

SMART REMOTE

DSP-2000SR

PASS

TESTING

FAIL

LOW BATTERY

OFF

2-14

gc06f.eps

Figure 2-5. Standard and Smart Remote Features

Table 2-5. Remote Connectors and Features

Item Feature Description

Getting Started

Remote Features

4 5

6 7

RS-232C serial port

AC adapter/ charger jack

AC power indicator

RJ45 connector A shielded 8-pin jack for shielded and unshielded twisted pair cable. Pass LED A green LED that turns on at the end of a test if no faults were

Test LED A yellow LED that turns on when a test is in progress. Fail LED A red LED that turns on at the end of a test if one or more faults were

A DB9P connector for loading software updates.

Connection for the ac adapter/charger supplied with the test tool.

LED Style 1: A green LED that turns on when the test tool is powered with the ac adapter/charger.

LED Style 2: A multicolor LED with four states:

Off: AC adapter/charger is not connected, or is connected without the battery pack installed.

Blinking Red: The ac adapter/charger is trickle charging the battery in preparation for fast charging. This mode indicates an extremely low battery voltage. The test tool may not operate.

Steady Red: The ac adapter/charger is fast charging the battery. Steady Green: Fast charging is complete. The ac adapter/charger

continues to trickle charge the battery.

detected.

8 9

Low-battery LED A LED that turns on when the smart remote battery voltage is low. Rotary switch On/off switch for smart remote.

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Strap and Bail

The test tool and the smart remote have a strap and a bail. Figure 2-6 shows how to attach the strap and open the bail.

Figure 2-6. Attaching the Strap and Opening the Bail

Rotary Switch

The following paragraphs summarize the modes you can select with the rotary switch on the main unit.

Off

Turns the test tool off. Setup information and test results that were saved via the SAVE key are stored in nonvolatile memory.

2-16

gc07f.eps

Autotest

Autotest is the most frequently used function in LAN cable testing. Autotest performs all of the tests necessary to qualify the cable you are testing. When the Autotest is complete, the tests that were run are listed with the overall result for each test. You can also view detailed results for each test. Results from at least 500 Autotests can be saved for printing or transmission to a host computer.

The following tests apply to twisted pair cable:

• Wire Map: Tests for opens, shorts, crossed pairs, reversed wires, and split

• NEXT: Tests twisted pair cable for near-end crosstalk (NEXT).

• Length: Displays the length of twisted pairs in feet or meters.

• Propagation Delay: Measures the times taken for a signal to travel the length

• Delay Skew: Calculates the differences in propagation delays between the

• Impedance: Measures the impedance of each cable pair. If impedance

• Attenuation: Measures the attenuation of each cable pair.

• Resistance: Measures the loop resistance of each cable pair.

• ACR: Calculates the ratio of attenuation to crosstalk for all combinations of

• RL (Return Loss): Measures signal loss due to signal reflections in the cable.

• PSNEXT (Power Sum Next; Model DSP-2000 only): For each cable pair,

Getting Started

Rotary Switch

Note

The tests run during an Autotest on twisted pair cable depend on the test standard selected. Tests not applicable to the selected test standard are not run or displayed. For a list of tests applicable to various test standards, see Table C-1 in Appendix C.

pairs.

of each cable pair.

cable pairs.

anomalies are detected, the test reports the largest anomaly detected on each cable pair.

cable pairs.

PSNEXT is calculated as the sum of the NEXT from all other pairs.

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Users Manual

Single Test

Monitor

The following tests apply to coaxial cable:

• Impedance: Measures the impedance of the cable.

• Resistance: Measures the loop resistance of the cable, shield, and terminator.

• Length: Measures the length of unterminated cables.

• Anomaly Detection: During a coaxial cable test, the test tool also detects and

reports the position of the largest impedance anomaly (if any are present) on the cable.

The SINGLE TEST mode provides access to the individual tests defined by the selected test standard, except for the ACR test. This mode also allows execution of TDR and TDX analyzer tests. A scanning function, which continuously repeats the test, is available for the wire map, resistance, TDR, and TDX analyzer tests.

The MONITOR mode allows you to continuously monitor impulse noise on network cables or network activity on Ethernet systems. Network activity is monitored for collisions, jabber, and percentage of system utilization.

2-18

The MONITOR mode also includes a hub port locator, which helps you determine port connections at a hub. Model DSP-2000 includes a hub port capabilities feature that determines the standards supported by a port.

Setup

Getting Started

Rotary Switch

Allows you to do the following:

• Select a test standard and cable type.

• Select an average cable temperature when temperature is required by the

selected test standard.

• Set the test tool to test cable installed in conduit when a conduit setting is

required by the selected test standard.

• Enable remote testing or automatic remote detection when you use a second

main unit or a smart remote as a remote unit.

• Set the cable identification number to increment automatically each time you

save Autotest results.

• Set the backlight timer to turn off the backlight after a specified period of

inactivity.

• Set the power-down timer to switch the test tool to a low-power mode after a

specified period of inactivity.

• Set the fault threshold for the impulse noise test.

• Select interface parameters for the serial port.

• Enable or disable the test tool’s beeper.

• Set the date and time.

• Select a format for the date and time.

• Select a unit for length measurements.

• Select a format for displaying decimal fractions.

• Select a language for the display and printed reports.

• Select a frequency for the power line noise filter.

• Enable or disable the shield continuity test.

• Modify test standards for custom cable configurations.

• Select 100 MHz or 155 MHz as the maximum frequency for NEXT, ACR, and

attenuation tests.

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Print

Allows you to send saved reports or report summaries to a serial printer. You can print the results from previously stored Autotests. Also allows editing of the report identification information.

Special Functions

Allows you to do the following:

• View or delete test reports saved in memory.

• Generate a tone to use with an inductive pickup to identify cable runs (Model

• Determine the cable NVP to ensure maximum accuracy of length and

• View the status of the NiCad battery in the main unit or smart remote.

• Calibrate the test tool to work with a new remote unit.

• Run a self-test to verify proper operation of the test tool and the remote.

DSP-2000 only).

resistance results.

Smart Remote (Model DSP-100)

The SMART REMOTE mode causes the test tool to function as a smart remote. In the SMART REMOTE mode, when remote testing is enabled on the main unit, the remote unit sends results from REMOTE tests to the main unit.

Turning On the Test Tool

To turn on the test tool, turn the rotary switch from OFF to any one of the available modes. The power-up screen, which appears for about 3 seconds, shows the software, hardware, and test standards versions for your main and remote units.

During this time, the test tool also performs a self-test. If a fault is detected during the self-test, the following message appears: INTERNAL FAULT DETECTED. REFER TO MANUAL. For information, see “If the Test Tool Fails” in Chapter 8.

2-20

Selecting a Language for Displays and Reports

The test tool displays results and prints reports in English, German, French, Spanish, and Italian.

To select a language for displays and reports, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down four times.

3. Use D to highlight the currently selected language.

4. Press ! Choice.

5. Use D U to highlight the language you want.

6. Press E to accept the highlighted language. The test tool’s display now

appears in the selected language.

Performing a Self-Test

The self-test verifies that the test tool and the remote are operating properly. To run the self-test, proceed as follows:

1. Turn the rotary switch to SPECIAL FUNCTIONS.

Getting Started

Turning On the Test Tool

2. Use D to highlight Self Test.

3. Press E.

4. Use the 2m Cat5 patch cable provided to connect the test tool to the remote as

described on the display.

5. Press T to start the self-test.

6. When the self-test is complete, you can either return to the main Special

Functions menu by pressing e or start a new operation by turning the rotary switch to a new position.

If the self-test fails, refer to “If the Test Tool Fails” in Chapter 8.

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Overvoltage Test

The test tool periodically checks for dc voltages on the cable connected to the RJ45 jack. A dc voltage means that the test tool is connected to an active telephone cable or other power source. If voltage is detected, the following message appears: WARNING! EXCESSIVE VOLTAGE DETECTED AT INPUT. Voltage on the cable can damage the test tool or cause errors in measurements. Voltage must be removed before you can run any tests.

Noise Test

The test tool periodically checks for excessive electrical noise on the cable under test. If excessive noise is detected, the following message appears:

WARNING Excessive noise detected. Measurement accuracy may be degraded. To continue the test,

press E. If you continue the test and then save the test results, the test report will include the warning given above.

To stop the test and return to the first screen of the selected test mode, press e.

Configuring the Test Tool

Controlling the Backlight

To turn on the display backlight, press C on the keypad. Press the key again to turn off the backlight. On Model DSP-2000, the backlight key toggles the backlight between two levels of brightness.

You can set the backlight timer to automatically turn off the backlight after a specified period of inactivity. You can also disable the backlight timer.

To set the backlight timer or disable the timer, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down once.

3. Use D to highlight the backlight time-out setting.

4. Press ! Choice.

5. Use D U to highlight the desired time-out period or the disable status.

6. Press E to accept the highlighted selection.

2-22

When the backlight time-out is enabled, the backlight timer starts counting down after all tests are complete or after the last key entry or movement of the rotary switch. To restart the backlight timer while the backlight is on, press any key (except the backlight key) or turn the rotary switch to a new mode.

Adjusting the Display Contrast

To adjust the display contrast, hold down C for 1 second or longer. The following message appears: USE D U KEYS TO ADJUST CONTRAST. Adjust the contrast to the desired level then press E to accept the new level. The display contrast setting is saved in memory when you turn off the test tool.

Selecting a Power Line Filter Frequency

The test tool has a noise filter to keep ac noise (50 or 60 Hz) from affecting resistance measurements.

To set the frequency of the noise filter to the frequency of your ac power, proceed as follows:

1. Turn the rotary switch to SETUP.

Getting Started

Configuring the Test Tool

2. Press $Page Down four times.

3. Use D to highlight the power line frequency.

4. Press ! Choice.

5. Use D U to highlight the frequency you want.

6. Press E to accept the highlighted frequency.

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Selecting a Test Standard and Cable Type

The test standard and cable type you select determine which standards are used and which tests are run during cable testing. The test tool is equipped with information for all the common test standards and cable types.

Several of the test standards for twisted pair cable are defined for both a channel and a basic link configuration. The test limits for a channel are looser than those for a basic link because the channel limits allow for the effects of two connections at a horizontal cross-connect and a transition connector near the telecommunications outlet in the work area. Figure 2-2 shows the connections involved in a channel; Figure 3-1 shows the connections involved in a basic link.

To select a test standard and cable type, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press ! Choice.

3. Use D U to highlight the test standard you want.

4. Press E to accept the highlighted test standard. The test tool displays a

menu of the cable types that are valid for the selected test standard.

5. Use D U to select the cable type you want; then press E. If you select a shielded cable type, you can enable or disable the shield continuity

test on page 6 of the SETUP screens. You can test cables for NEXT, attenuation, and ACR up to 100 MHz or 155 MHz.

Because no industry standards specify cable performance beyond 100 MHz, there are no test limits for these measurements.

The maximum frequency selection is on page 6 of the SETUP screens.

Selecting an Average Cable Temperature

Some test standards require you to select an average temperature for the cable you are testing. The selected temperature appears on the display when you turn the rotary switch to AUTOTEST. If the test standard has no temperature-dependent limits, N/A is displayed.

If you select a test standard that has temperature-dependent limits, the test tool uses a default value of below 21°C (69°F) for the average cable temperature.

2-24

An increase in cable temperature causes an increase in attenuation. To compensate for this increase, the test tool uses the temperature you select to modify the attenuation test limits. To avoid passing faulty cables or failing good cables, select

the temperature that is closest to the cable’s average temperature. To select an average cable temperature, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Use D to highlight the average cable temperature.

3. Press ! Choice.

4. Use D U to highlight the temperature range you want.

5. Press E to select the highlighted temperature range.

Selecting a Conduit Setting

Some test standards require you to specify whether or not the cable is installed inside conduit. If the test standard requires a conduit setting, the current setting (yes or no) appears on the display when you turn the rotary switch to AUTOTEST. If the test standard does not require a conduit setting, N/A is displayed.

Getting Started

Configuring the Test Tool

Metal conduit slightly increases a cable’s attenuation. To compensate for this increase, the test tool’s attenuation test limits are raised when the conduit setting is set to “yes.”

To change the conduit setting, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Use D to highlight the conduit setting.

3. Press ! Choice.

4. Use D U to highlight the setting you want.

5. Press E to accept the highlighted setting.

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Selecting a Length Unit

The test tool displays length measurements in meters or feet. To change the unit of measurement, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down four times.

3. Press ! Choice.

4. Use D U to highlight the desired unit.

5. Press E to accept the highlighted unit.

Selecting a Numeric Format

The test tool displays decimal fractions with a decimal point separator (0.00) or a comma separator (0,00).

To change the numeric format, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down four times.

2-26

3. Use D to highlight the numeric format.

4. Press ! Choice.

5. Use D U to highlight the desired format.

6. Press E to accept the highlighted format.

Setting the Date and Time

The test tool has a clock that records the date and time for saved test results. To change the date or time or the format for the date or time, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down three times.

3. Use D to highlight the date or time parameter you want to change.

4. Press ! Choice. The display you see next depends on which parameter

you are changing.

If you are changing the date or time, use $INC or #DEC to

increment or decrement the highlighted number. Use L R to move the highlighted area from one number to another number.

If you are changing the date or time format, use D U to highlight the format

you want.

5. Press E to accept the highlighted date, time, or format.

Getting Started

Configuring the Test Tool

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Setting the Power-Down Timer

To extend battery life, you can set the power-down timer to automatically switch the test tool to a low-power mode after a selected period of inactivity. You can also disable the power-down timer.

When the test tool switches to low-power mode, the display goes blank. To reactivate the display, press C.

To set the power-down timer or enable/disable the timer, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down once.

3. Use D to highlight the power-down timer status.

4. Press ! Choice.

5. Use D U to highlight the desired time-out period or the enable/disable

status.

6. Press E to accept your selection. Model DSP-2000 turns itself off if not used for 30 minutes after power-down.

When this happens, pressing C turns on the test tool. The test tool then goes through its power-on sequence as though it were turned on with the rotary switch.

Enabling or Disabling the Audible Tones

To enable or disable the test tool’s audible tones, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $Page Down twice.

3. Use D to highlight the audible tone status.

4. Press ! Choice.

5. Use D U to highlight the desired enable or disable status.

6. Press E to accept your selection.

2-28

Remote Lights, Messages, and Audible Tones

The standard and smart remotes indicate various states by flashing light-emitting diodes (LEDs) and emitting audible tones, as described in Table 2-6.

Table 2-6. Status Indications from Remotes

Status Standard Remote Indications Smart Remote Indications

Getting Started

Power on self-test passed. The unit beeps and all LEDs

flash in sequence.

Power on self-test failed. The unit beeps and the fail LED

flashes continuously.

Main unit is running a test. Test LED is on. Pass and fail

LEDs flash as tests pass or fail.

Previous test passed. Pass LED turns on for 15

seconds.

Previous test failed. Fail LED turns on for 15

seconds.

Battery voltage is low. Message appears on main unit. The unit beeps and the low-

Battery voltage is too low to operate.

Overvoltage condition detected on cable under test.

Message appears on main unit. The unit beeps and the low-

Message appears on main unit. The unit beeps and all LEDs

The unit beeps and all LEDs flash in sequence.

The unit beeps and the fail LED flashes continuously.

Testing LED is on. Pass and fail LEDs flash as tests pass or fail.

Pass LED turns on for 15 seconds.

Fail LED turns on for 15 seconds.

battery LED flashes continuously.

battery LED is on continuously.

flash continuously.

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Remote End Testing

If you have a second test tool or a smart remote, you can perform remote end testing. The remote end testing feature allows you to run the near-end crosstalk (NEXT) test at the far end of the cable and get the attenuation to crosstalk ratio (ACR) from the far end of the cable without switching the positions of the main and remote units.

When you enable remote testing the NEXT@REMOTE and ACR@REMOTE tests appear in the AUTOTEST and SINGLE TEST modes if the selected test standard requires the tests. Model DSP-2000 also includes RL@REMOTE and PSNEXT@REMOTE tests.

Selecting Auto Detect allows the test tool to identify the remote as a standard or smart remote and run the REMOTE tests as appropriate.

To enable remote end testing, proceed as follows:

1. Turn the rotary switch on the main unit to SETUP.

2. Use D to highlight the remote end testing status.

3. Press ! Choice.

4. Use U to highlight Enable or Auto Detect; then press E

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If you use a DSP-100 unit as a remote, the remote unit displays the following status messages:

SMART REMOTE READY: The remote unit is waiting for the main unit to start a test.

SMART REMOTE TESTING: The main unit is running a test. SMART REMOTE PASS or FAIL: Pass or fail is the overall result of the test

just completed. This message is displayed for about 3 seconds after a test is completed.

SMART REMOTE READY PREVIOUS TEST: PASS or PREVIOUS TEST: FAIL: The remote is

waiting for the main unit to start another test. Pass or fail is the overall result of the previous test.

Remote Communication Error

If you are running the NEXT@REMOTE or RL@REMOTE test, and the main unit detects a communication problem with the remote, the following message appears on the main unit: REMOTE communication error. This message means that the REMOTE data cannot be transmitted to the main unit, usually because the cable is defective. To verify proper remote operation, run a

self-test as described in the earlier section “Performing a Self-Test.”

Battery Status

The test tool displays a message when its battery voltage or the remote battery voltage is low. Table 2-7 shows the battery status messages and what you should do if a battery message appears.

Note

To ensure continued operation while charging the battery, always connect the ac adapter/charger when the message

WARNING RECHARGEABLE BATTERY VOLTAGE IS LOW appears.

Getting Started

Remote Communication Error

Table 2-7. Battery Status Messages

Message Displayed What You Should Do

WARNING RECHARGEABLE BATTERY VO LTAGE IS LOW.

RECHARGEABLE BATTERY VOLTAGE IS TOO LOW TO OPERATE.

WARNING REMOTE BATTERY VOLTAGE IS LOW.

WARNING REMOTE BATTERY VOLTAGE IS TOO LOW TO OPERATE.

INTERNAL DATA STORAGE BATTERY VO LTAGE IS LOW.

Connect the ac adapter/charger.

Turn the test tool off and connect the ac adapter/charger. If the tool does not operate when you turn it on, turn it off again and allow the battery to charge for about 30 minutes.

For a standard remote, have a 9V alkaline battery available. For a smart remote or second main unit, connect the ac adapter/charger.

Replace the alkaline battery in standard remote. Charge the NiCad battery in a second main unit or smart remote.

Have the lithium battery replaced at a Fluke Service Center.

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Battery Status Display

To see the charge level of the main unit’s NiCad battery, turn the rotary switch to SPECIAL FUNCTIONS; then select Battery Status. To see the charge level of the smart remote’s battery, connect the smart remote to the main unit (use the CABLE TEST jack on Model DSP-2000); then use ! to toggle the display.

Connecting the battery charger can change the readings displayed on the battery status screen. These changes are due to the charger’s effect on the test tool’s charging circuit.

Note

2-32

Chapter 3 provides the following information:

• Instructions and test result descriptions for an Autotest on twisted pair cable.

• Instructions and test result descriptions for an Autotest on coaxial cable.

• Instructions for saving Autotest results.

Autotest Softkeys

The following softkey functions are active on the Autotest screens noted. The PSNEXT screen is available on Model DSP-2000 only.

! or @ View Result: ! shows the results of the last Autotest run. Active on the first Autotest screen. @ shows detailed test results regarding the highlighted cable pair or pairs. Active on the first screens for the NEXT, attenuation, ACR, RL, and PSNEXT tests.

Chapter 3

Autotest

@ View Plot: Press to see a frequency response plot of the test results. Active on the first screen and the results screen for the NEXT, attenuation, ACR, RL, and PSNEXT tests.

@ Next Pair, @ Next Pairs: Press to see the detailed results or the plot for the next cable pair or pairs tested. Active on the results and plot screens for the NEXT, attenuation, ACR, and RL tests.

! 155 MHz: Press to see NEXT, ACR, or attenuation results plotted up to 155 MHz. This key is available only if the frequency option under SETUP is set to 155 MHz.

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Autotest on Twisted Pair Cable

The procedures for an Autotest on shielded and unshielded twisted pair cable are the same. When shielded cable is selected, the test tool performs an additional test for shield continuity if the shield test is enabled in SETUP.

To run the Autotest on twisted pair cable, refer to Figure 3-1 and proceed as follows:

RJ45

Jack

CABLE ANALYZER

DSP-2000

2 Meters

Wall Outlet

2 Meters

TEST

FAULT INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

WAKE UP

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Test Tool

Patch Panel

Smart

Remote

OFF

Figure 3-1. Autotest Connections for Twisted Pair Cable (Basic Link Configuration and DSP-

2000 Shown)

3-2

DSP-2000SR

PASS

TESTING

FAIL

LOW BATTERY

SMART REMOTE

gc08f.eps

Autotest

Autotest on Twisted Pair Cable

Note

The REMOTE tests will run only if the remote is a smart remote or a DSP-100 with the SMART REMOTE mode selected.

1. If you are using a DSP-100 main unit as the remote, turn the remote unit’s

rotary switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

2. Use a 2m patch cable of the correct impedance to connect the remote to the far

end of the cable link.

3. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

4. Turn the rotary switch on the main unit to AUTOTEST.

5. Verify that the settings displayed are correct. You can change these settings in

the SETUP mode.

6. Use a 2m patch cable of the correct impedance to connect the test tool to the

near end of the cable link. On Model DSP-2000, connect to the CABLE TEST jack.

7. Press T to start the Autotest.

Notes

Pressing T when the previous Autotest was not saved causes the test tool to display a warning message. In this case, you can either save the results of the previous test by pressing S or delete the results and start a new Autotest by pressing T.

If a remote is not connected, the test tool displays the message SCANNING FOR REMOTE and does not run the Autotest until a remote is connected.

If the calibration message appears, refer to “Calibrating the Test Tool” in Chapter 6 for complete calibration instructions.

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Link Performance Grade Result (Headroom)

When an Autotest is complete, the display shows the overall result (pass or fail) and the worst-case NEXT margin, or headroom. Headroom is the smallest difference found between the measured NEXT value and the limit. This number serves as a figure of merit that reflects the overall performance of the link.

Automatic Diagnostics (Model DSP-2000)

If an Autotest fails, you can press the FAULT INFO key to see more specific information on the cause of the failure. Figure 3-2 shows examples of automatic diagnostics displays for a NEXT failure and an open pin failure.

The arrow in the diagram at the top of the display shows the location of the failure. The bottom half of the display describes the failure and suggests ways to fix the fault. When appropriate, softkeys let you see the plot or plots relevant to the failure. If more than one fault was found, you can use the $Next Fault and #Prev Fault softkeys to scroll through the diagnostics displays.

3-4

Automatic Diagnostics (Model DSP-2000)

Figure 3-2. Examples of Automatic Diagnostics Displays

Autotest

gc09c.eps

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Autotest Results for Twisted Pair Cable

To see detailed results from a test, use D U to highlight the test on the main Autotest menu; then press E.

Note

Wire Map Test

The wire map test tests and displays the wire connections between the near and far ends of the cable on all four pairs. Shield continuity is also tested if a shielded cable type is selected and you have not disabled shield testing in SETUP. The pairs tested are those defined by the selected test standard. Table 3-1 shows examples of wire map displays.

If the wire map test passes, the Autotest continues. You can view the wire map test results when the Autotest is complete. If the wire map test fails, the Autotest halts and the wire map screen appears with the word FAIL. You can then save the wire map results by pressing

$Continue Test.

S. To continue the Autotest, press

Correct wiring (Top row

represents nearend connector.)

3-6

Wire Map

Condition

Table 3-1. Wire Map Displays

Display Schematic

(only affected pairs

shown)

1 2 3 6 4 5 7

gc42i.eps

gc43i.eps

Description

Cable wiring is

correct. Shield (S)

shown only if

required by

selected test

5 7

standard.

Autotest Results for Twisted Pair Cable

Table 3-1. Wire Map Displays (continued)

Autotest

Wire Map

Condition

Crossed wires

Reversed pairs

Crossed pairs

Short

Display Schematic

(only affected pairs

shown)

1 2 3 6

gc44i.eps

1 2

gc46i.eps

1 2 3 6

gc48i.eps

1 2 3 6

gc45i.eps

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Description

A wire in the 1,2

pair is crossed with

a wire in the 3,6

pair. Wiring does not form a recognizable circuit.

Wires 1 and 2 are crossed.

1 2

Pairs 1,2 and 3,6

are crossed.

2 3 6

Wires 1 and 3 are

shorted. You can

use the TDR test

to locate the short.

Open

Split pair

gc50i.eps

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gc51i.eps

Wire 1 is open.

1 2

You can use the

1 2

TDR test to locate the open.

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1 2 3 6

A wire in the 1,2

pair is twisted with

a wire in the 3,6

pair. You can use

the TDX analyzer to locate the split pair.

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Resistance

The resistance test measures the dc loop resistance for each cable pair. The resistance results screen displays the resistance, limit, and pass/fail result for each cable pair. A PASS result means that the measured resistance is less than the limit. A FAIL result means that the measured resistance exceeds the limit.

Length

The length test measures the length of each cable pair tested. The main Autotest results screen shows the length of the cable pair having the shortest electrical delay. Length is displayed in meters or feet. The length results screen displays the length, limit, and pass/fail result for each cable pair. You can change the length units in the SETUP mode, as described in “Selecting a Length Unit” in Chapter 2.

A 2 to 5 percent difference in measured length between twisted pairs is typical. This difference is due to differences in the number of twists in the cable pairs.

Differences between measured and actual values of cable length can

be caused by variations in the cable’s NVP value. To ensure maximum accuracy of length measurements, perform an NVP calibration as described in Chapter 6.

Notes

3-8

The length test limits include an extra 10% to account for variations in NVP.

A PASS result means that the measured length is within the specified limit for the selected test standard. A FAIL result means that the measured length exceeds the limit.

Propagation Delay and Delay Skew

Propagation delays are the times taken in nanoseconds for a test pulse to travel the length of each cable pair.

Delay skews are the differences in propagation delays between the shortest delay, which is displayed as 0 ns, and the delays of the other cable pairs.

The propagation delay and delay skew results show a limit if the test is required by the selected test standard. If the test is not required, the results always show PASS.

Characteristic Impedance

The characteristic impedance test determines the approximate characteristic impedance of each cable pair.

Note

Impedance measurements require a cable at least 5m (16 ft) long. Cables shorter than this length will always pass the impedance test.

A PASS result means that the measured impedance is within the specified limit for the selected test standard. A FAIL result means that the measured impedance exceeds the specified limit, or an impedance anomaly is detected.

Autotest

Autotest Results for Twisted Pair Cable

A Warning result means that the measured impedance exceeds test limits, but the characteristic impedance test is not required by the selected test standard. The warning result causes a warning to appear as the test summary result in printed reports.

If an impedance anomaly is detected on a cable pair, the display shows the distance to the anomaly (in meters or feet) and the result is displayed as FAIL. The test tool reports an anomaly if 15% or more of the test signal is reflected. If more than one anomaly is detected on a cable pair, the distance to the largest anomaly is displayed. You can use the TDR test to plot the locations and sizes of impedance anomalies on the cable.

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Attenuation

Incorrect conduit or temperature settings can cause false attenuation results. You can change these settings in the SETUP

mode, as described in “Configuring the Test Tool” in Chapter 2.

The attenuation test measures the loss of signal strength over the length of the cable.

The first attenuation results screen shows the cable pairs tested, the worst-case attenuation margin found, and a PASS or FAIL result for each pair.

To see detailed results for the cable pairs, use D U to highlight a cable pair, then press @ View Result. Table 3-2 describes the items on the attenuation results screen.

Item Description

Note

Table 3-2. Items on the Attenuation Results Screen

Pair

Result

Attenuation If the test passed, this value is the highest measured attenuation. If the test

Frequency

Limit

Margin

The cable pair relevant to the results. The overall result for the test. A PASS result means that measured

attenuation is lower than the specified limit for the selected test standard. A FAIL result means that the measured attenuation is higher than the specified limit.

failed, this value is the highest measured attenuation that exceeds the test limits.

If the test passed, this frequency is where the highest measured attenuation occurred. If the test failed, this is where the highest failing value of attenuation occurred.

The highest attenuation value acceptable at the frequency shown. This value is based on the maximum allowable cable length.

The difference between the worst-case attenuation and the limit. A positive number means that the measured attenuation value is lower than the limit. A negative number means that the attenuation is higher than the limit.

3-10

Autotest

Autotest Results for Twisted Pair Cable

Pressing @ View Plot produces the attenuation plot screen. Figure 3-3 shows an example of the screen and Table 3-3 describes the items on the screen.

4 3

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Figure 3-3. The Attenuation Plot Screen

Table 3-3. Items on the Attenuation Plot Screen

Item Description

The cable pair relevant to the plot.

Frequency range in MHz of the attenuation test.

Margin is the difference between the limit and measured values plotted at the cursor’s

position. Use L R to move the cursor left or right. If you move the cursor beyond the highest test frequency specified by the selected test standard, the readout shows the attenuation value at the cursor’s position.

The measured attenuation for the cable pair.

The attenuation limits, as defined by the selected test standard. A crosshair is shown if the

limit is defined for only one frequency. Decibels of attenuation.

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NEXT Test

The NEXT test measures the crosstalk between cable pairs. This crosstalk value is expressed as the difference in amplitude (in dB) between the test signal and the crosstalk signal. NEXT is measured from the main-unit end of the cable over a frequency range defined by the selected test standard.

If the NEXT test fails, you can use the TDX analyzer to locate the source of the crosstalk on the cable.

The first NEXT screen displays the cable pairs tested, the worst-case NEXT margin, and the test result for each set of pairs.

To see detailed results for the cable pairs, use D U to highlight the pairs; then press @ View Result. Table 3-4 describes the items on the NEXT results screen.

Table 3-4. Items on the NEXT Results Screen

Item Description

Pairs

Result

Frequency

Limit

Margin

The cable pairs relevant to the results. The overall result for the NEXT test. A PASS result indicates that the NEXT

between the cable pairs was higher than the specified NEXT for the selected test standard. A FAIL result indicates that the NEXT was lower than specifications.

The worst-case NEXT. Worst-case NEXT is the measured NEXT value that is closest to falling below specifications. If the NEXT falls below specifications, the value displayed is the value that falls the farthest below specifications.

The frequency where the worst-case NEXT value is measured. The lowest NEXT value acceptable for the worst-case frequency. The difference between the worst-case NEXT value and the limit. A positive number

means that the measured NEXT value is higher than the limit (PASS). A negative number means that the NEXT is lower than the limit (FAIL).

3-12

Autotest

Autotest Results for Twisted Pair Cable

Pressing @ View Plot produces the NEXT plot screen. Figure 3-4 shows an example of the screen and Table 3-5 describes the items on the screen.

Figure 3-4. The NEXT Plot Screen

Table 3-5. Items on the NEXT Plot Screen

Item Description

The cable pairs relevant to the plot.

Frequency range in MHz of the NEXT test.

Margin is the difference between the limit and measured values plotted at the cursor’s

position. Use L R to move the cursor left or right. If you move the cursor beyond the highest test frequency specified by the selected test standard, the readout shows the NEXT value at the cursor’s position.

The limits for NEXT, as defined by the selected test standard. A crosshair is shown if the

limit is defined for only one frequency.

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Decibels of crosstalk attenuation (NEXT) between the cable pairs.

The measured NEXT for the cable pairs.

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DSP-100/2000

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NEXT@REMOTE Results

The NEXT@REMOTE test and its results are identical to the NEXT test described above, except that the NEXT@REMOTE measurements are taken from the remote end of the cable and sent to the main unit.

ACR

The ACR test calculates the ratio of attenuation to crosstalk (ACR) for each combination of cable pairs. ACR is expressed as the difference (in dB) between the measured NEXT and attenuation values. ACR is calculated using values obtained from the NEXT and attenuation tests.

ACR Results

The first ACR results screen shows the NEXT pairs and attenuation pair used to calculate the ACR result, the worst-case ACR margin, and a PASS or FAIL result for each set of pairs.

To see detailed results for the cable pairs, use D U to highlight the pairs; then press @ View Result. Table 3-6 describes the items on the ACR results screen.

3-14

Autotest Results for Twisted Pair Cable

Table 3-6. Items on the ACR Results Screen

Item Description

Autotest

NEXT Pairs Atten. Pair

Result

ACR (dB)

Frequency

Limit

Margin

The pairs that produced the crosstalk value used in calculating the ACR result. The pair that produced the attenuation value used in calculating the ACR result. The overall result for the ACR test. A PASS result means that the calculated ACR

is higher than the value specified for the selected test standard. A FAIL result means that the calculated ACR is lower than the specified value.

The worst-case ACR. Worst-case ACR is the calculated ACR value that is closest to exceeding specifications. If the ACR exceeded specifications, the value displayed is the ACR value that exceeded specifications by the greatest amount.

The frequency where the worst-case ACR value is calculated. The specified limit for the ACR at the worst-case frequency. The limit is defined by

the test standard selected. The difference between the worst-case ACR and the limit. A positive number

means that the worst-case ACR is higher than the limit. A negative number means that the worst-case ACR is lower than the limit.

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Pressing @ View Plot produces the ACR plot screen. Figure 3-5 shows an example of the screen and Table 3-7 describes the items on the screen.

5 4

Figure 3-5. The ACR Plot Screen

Table 3-7. Items on the ACR Plot Screen

Item Description

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3-16

The cable pairs relevant to the plot.

Frequency range in MHz of the ACR test.

Margin is the difference between the limit and measured values plotted at the cursor’s

position. Use L R to move the cursor left or right. If you move the cursor beyond the highest test frequency specified by the selected test standard, the readout shows the ACR value at the cursor’s position.

The ACR limits, as defined by the selected test standard.

Decibels of ACR for the cable pair.

The measured ACR for the cable pairs.

ACR@REMOTE

The ACR@REMOTE test is identical to the ACR test, except that the ACR values are calculated using NEXT@REMOTE values.

Return Loss (RL)

The RL test measures the difference between a test signal’s amplitude and the amplitude of signal reflections returned by the cable. The results of the RL test indicate how well the cable’s characteristic impedance matches its rated impedance over a range of frequencies.

The first RL results screen shows the cable pairs tested, the worst-case RL margin, and a PASS or FAIL result for each pair. To see detailed results for the cable pairs, use D U to highlight a pair; then press @ View Result. Table 3-8 describes the items on the RL results screen.

Table 3-8. Items on the RL Results Screen

Item Description

Autotest

Autotest Results for Twisted Pair Cable

Pair

Result

Frequency

Limit

Margin

The cable pair relevant to the results. The overall result for the RL test. A PASS result means that the measured RL is

lower than the specified limit for the selected test standard. A FAIL result means that the measured RL is higher than specified limit.

The worst-case return loss. Worst-case RL is the measured RL value that is closest to exceeding specifications. If the RL exceeds specifications, the value displayed is the value that exceeds specifications by the greatest amount.

The frequency where the worst-case RL occurred. The specified limit for RL at the worst-case frequency. The limit is defined by the

test standard selected. The difference between the worst-case RL and the Limit. A positive number means

that the worst-case RL is better than the limit. A negative number means that the worst-case RL exceeds the limit.

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DSP-100/2000

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Pressing @ View Plot produces the RL plot screen. Figure 3-6 shows an example of the screen and Table 3-9 describes the items on the screen.

5 4

Figure 3-6. The RL Plot Screen

Table 3-9. Items on the RL Plot Screen

Item Description

The cable pair relevant to the plot.

Frequency range in MHz of the RL test.

Margin is the difference between the limit and measured values plotted at the cursor’s

position. Use L R to move the cursor left or right. If you move the cursor beyond the highest test frequency specified by the selected test standard, the readout shows the RL value at the cursor’s position.

The limits for RL, as defined by the selected test standard.

gc13c.eps

Decibels of RL for the cable pair.

The measured RL for the cable pair.

RL@REMOTE (Model DSP-2000)

The RL@REMOTE test is identical to the RL test, except that the RL values are measured from the remote end of the cable.

3-18

PSNEXT (Power Sum NEXT; Model DSP-2000)

The PSNEXT results show how much each cable pair is affected by the combined NEXT from the other pairs. PSNEXT is expressed as the difference in amplitude (in dB) between the crosstalk received on a cable pair and a test signal transmitted on the other pairs.

PSNEXT is calculated from NEXT values. The descriptions of the results are the same as for NEXT results, except that they show the sum effect of NEXT on a cable pair.

Autotest on Coaxial Cable

To run an Autotest on coaxial cable, refer to Figure 3-7 and proceed as follows:

Autotest

Autotest on Coaxial Cable

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DSP-100/2000

Users Manual

12345678

For Length Test, remove far-end Terminator

BNC “T”

Connector

3-20

CABLE ANALYZER

DSP-2000

Test Tool

TEST

FAULT

INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Figure 3-7. Autotest Connections for Coaxial Cable (Model DSP-2000 Shown)

gc04f.eps

1. Turn off any PC nodes connected to the cable you are testing.

2. If you want the Autotest to report cable length, remove the terminator from the

far end of the cable.

3. Turn the rotary switch to AUTOTEST.

4. Verify that the test standard and cable type displayed are correct. You can

change these settings in the SETUP mode.

5. On Model DSP-100, remove any cable connected to the test tool’s RJ45

connector.

6. Remove the terminator from the near end of the coaxial cable and connect the

cable to the BNC connector on the test tool. On Model DSP-2000, use the RJ45 to coaxial adapter to connect the cable to the CABLE TEST jack.

7. Press T to start the Autotest.

Autotest Results for Coaxial Cable

An Autotest on coaxial cable performs the following tests:

Characteristic Impedance

Autotest

Autotest Results for Coaxial Cable

Note

Impedance measurements require a cable at least 5m (16 ft) long. Terminated cables shorter than this length will always pass the impedance test. Unterminated cables shorter than this length will always fail the impedance test.

The characteristic impedance test determines the approximate characteristic impedance for the cable. A PASS result means that the impedance is within the limit specified by the selected test standard. A FAIL result means that the impedance exceeds the limit. You can use the TDR test to plot the locations and sizes of all impedance anomalies on the cable.

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Resistance

The resistance test measures the loop resistance of the cable and the terminator. If a terminator is not connected or if the cable is open, the resistance value is reported as OPEN. If the cable or the terminator is shorted, the resistance value is reported as near 0Ω. Resistance values over 400Ω are reported as OPEN.

Length

Because a cable terminator eliminates signal reflections in coaxial cable, the test tool cannot measure the length of a terminated coaxial cable.

The length test measures the length of the cable when a terminator is not connected. If a terminator is connected, the result of the length test is reported as NO REFLECTION.

A PASS result means that the measured length is within the limit specified by the selected test standard. A FAIL result means that the measured length exceeds the limit.

Note

Anomaly

This result is shown at the bottom of the screen only if an impedance anomaly is detected. The test tool reports an anomaly if 10% or more of the test signal is reflected. The result shows the distance to the largest anomaly detected.

Notes

Differences between measured and actual values of cable length can

be caused by variations in the cable’s NVP value. To ensure maximum accuracy of length measurements, perform an NVP calibration as described in Chapter 6.

The length test limits include an extra 10% to account for variations in NVP.

3-22

Saving Autotest Results

The test tool’s memory can store the results of 500 or more Autotests, depending on the software version and test standard used. You can save the results from an Autotest anytime after the Autotest is complete, but before another Autotest or a Single Test is started.

To save Autotest results, proceed as follows:

1. After an Autotest is complete, press S. The test save screen appears, as

shown in Figure 3-8. Table 3-10 describes the items on the screen.

2. Use the appropriate editing keys to enter a cable identification name for the

test results you are saving.

To delete the character left of the cursor, press $Delete. To add

characters to the name, use the L R and D U keys to highlight characters in the list, then enter the highlighted character in the cable identification by pressing E. To edit characters in the middle of a name, use !Â to move the cursor into the name.

Model DSP-2000 allows you to increment or decrement an alphanumeric

character anywhere in the cable identification. Use !Â to highlight the desired character; then press @ INC or #DEC. To move the cursor back to the right-most character, press !Â until the cursor wraps back to the right.

Autotest

Saving Autotest Results

3. Press S to store the test results with the cable identification displayed. A

confirmation screen appears for about 2 seconds.

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DSP-100/2000

Users Manual

Figure 3-8. Screen for Saving Autotest Results

Table 3-10. Items on the Autotest Save Screen

Item Description

The characters you can use to make a name for the test results you are saving.

The date and time when the Autotest was saved.

The default name assigned to the results from the most recently completed test.

Softkey for moving the cursor to edit characters in the middle of the cable

identification. On Model DSP-100 with software versions 3.0 and earlier, use the

@ ³ softkey to move the cursor back to the right. On Model DSP-2000, press ! Â until the cursor wraps back to the right.

The remaining number of locations available for storing Autotest results.

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3-24

The Autotest Report

Automatically Incrementing the Cable Identification Name

The test tool’s auto increment function increments the last alphanumeric character of the cable identification name each time you save Autotest results.

To enable or disable the auto increment function, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $ Page Down once.

3. Press ! Choice.

4. Use D U to highlight the status you want.

5. Press E to select the highlighted status.

If Memory is Full

If the Autotest results you save fill the last available memory location, the following message appears: WARNING! TEST RESULT MEMORY IS NOW FULL. If you try to save additional test results after the memory has been filled, the following message appears: UNABLE TO SAVE TEST RESULTS. MEMORY IS FULL.

Autotest

To save additional test results, you must first delete one or more test reports from memory. You can delete test reports in the SPECIAL FUNCTIONS mode. For complete instructions, see Chapter 5, “Viewing and Printing Saved Reports.”

You can see how many memory spaces are available by pressing the $Memory softkey, which appears on several Autotest displays.

The test tool can store the results from more than 500 Autotests. The exact number of memory spaces available depends on the number of tests run by the selected test standard.

The Autotest Report

Figures 3-9, 3-10, and 3-11 on the following pages show how Autotest results appear in printed reports. You can print Autotest reports or edit the report’s identification information in the PRINT mode. See Chapter 5, “Viewing and Printing Saved Reports,” for complete instructions.

Note

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DSP-100/2000

Users Manual

The result printed on a report summary can be a pass or fail, or warning. A failure of any test required by the selected test standard produces a fail result on the report summary. A warning appears on reports for twisted pair cable if a length, impedance, propagation delay, or delay skew test produced a warning. The table in Appendix C shows which test standards can produce a warning result for these tests.

Mukilteo Cable Co. Test Summary: FAIL SITE: Westshore Business Park Cable ID: Bldg7Rm9Cbl3 OPERATOR: Kim Nguyen Date / Time: 01/07/97 10:01:05am NVP: 69.0% FAULT ANOMALY THRESHOLD: 15% Test Standard: TIA Cat 5 Channel FLUKE DSP-2000 S/N: 6680915 Cable Type: UTP 100 Ohm Cat 5 HEADROOM: -20.4 Software Version: 3.29 Standards Version: 3.06

Wire Map FAIL Result RJ45 PIN: 1 2 3 4 5 6 7 8 S Split pairs detected: 1,2-3,6 | | | | | | | | Patch Cable BAD or Patch Cable too short RJ45 PIN: 1 2 3 4 5 6 7 8

Pair 1,2 3,6 4,5 7,8

Impedance (ohms), Limit 80-120 107 105 W 106 108 Anomaly (ft) 71

Length (ft), Limit 328 75 77 74 74 Prop. Delay (ns) 110 113 109 109 Delay Skew (ns), Limit 50 1 4 0 0

3-26

Resistance (ohms) 4.6 4.9 4.9 4.6

Attenuation (dB) 5.1 6.7 5.2 4.9 Limit (dB) 24.0 22.5 24.0 24.0 Margin (dB) 18.9 15.8 18.8 19.1 Frequency (MHz) 100.0 88.3 100.0 100.0

Pairs 1,2-3,6 1,2-4,5 1,2-7,8 3,6-4,5 3,6-7,8 4,5-7,8

NEXT (dB) 36.6 F 43.5*F 40.2 26.1 F 31.8 F 50.1*F Limit (dB) 49.2 44.6 34.9 46.5 45.6 50.8 Margin (dB) -12.6 -1.1 5.3 -20.4 -13.8 -.7 Frequency (MHz) 4.9 9.3 35.4 7.1 8.1 3.9

* Measurement is within the accuracy limits of the instrument.

gc16f.eps

Figure 3-9. Part of an Autotest Report for Twisted Pair

Autotest

The Autotest Report

Mukilteo Cable Co. Test Summary: PASS SITE: World Technology Ctr. Cable ID: Rm16COAX34 OPERATOR: Mike Marshall Date / Time: 01/07/97 10:50:12am NVP: 80.0% FAULT ANOMALY THRESHOLD: 10% Test Standard: Coax Cables FLUKE DSP-2000 S/N: 6680915 Cable Type: 10Base2 (50 Ohms) Software Version: 3.29 Standards Version: 3.06

Impedance (ohms), Limit 42-58 49

Length (ft), Limit 607 No Reflection Prop. Delay (ns) No Reflection

Resistance (ohms), Limit 48.0-65.0 50.5

gc17f.eps

Figure 3-10. Autotest Report for Coaxial Cable

MUKILTEO CABLE CO.

Cable ID: Date / Time: SITE: Length(ft):

RM1CBL1 01/06/97 09:51:46am MOUNTAIN REAL ESTATE 77 PASS RM1CBL2 01/06/97 09:56:53am MOUNTAIN REAL ESTATE 98 FAIL RM2CBL1 01/06/97 10:00:44am MOUNTAIN REAL ESTATE 77 PASS RM2CBL2 01/06/97 10:01:50am MOUNTAIN REAL ESTATE 120 PASS RM2CBL3 01/06/97 10:04:16am MOUNTAIN REAL ESTATE 99 PASS

Total Length: 471

Figure 3-11. Autotest Report Summary

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3-28

Running Individual Tests

Chapter 4 provides the following information:

• Descriptions of the test results produced by the TDX analyzer and TDR

test.

• Instructions for running Single Tests on twisted pair cable.

• Instructions for running Single Tests on coaxial cable.

• Instructions for using the tests available in the MONITOR mode.

• Instructions for using the tone generator (Model DSP-2000).

Single Tests for Twisted Pair Cable

The SINGLE TEST mode on the rotary switch allows individual execution of the tests available in the Autotest mode, except the ACR test. SINGLE TEST mode features two additional tests: the TDX analyzer and the TDR test.

Chapter 4

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DSP-100/2000

Users Manual

Scanning Function

The Single Test versions of the wire map, resistance, TDR, and TDX analyzer tests include a scanning function, which you can activate by pressing the #Scanning ON softkey. The scanning function runs the test repeatedly and updates the display each time a test is complete. This function is useful for finding intermittent problems on a cable.

To extend battery life, connect the ac adapter/charger when using the scanning function for more than 1 minute.

When to Use a Remote Unit

A remote unit is required only when testing twisted pair cable. Table 4-1 shows which cable tests require a remote and which remotes support each test.

If a remote unit is detected at the start of a Single Test, the test tool runs a wire map test before running the selected test. If the wire map test fails, the test tool stops the test and displays the wire map. Press $Continue Test to run the selected test.

Note

4-2

Note

Model DSP-2000 is compatible only with Model DSP-2000SR units. Model DSP-100 is not compatible with Model DSP-2000SR units.

Running Individual Tests

When to Use a Remote Unit

Table 4-1. Remote Requirements for Cable Tests

Test Remote Unit

Autotest Required. Supported by all remotes. Wire Map Required. Supported by all remotes. NEXT Required. Supported by all remotes. NEXT@REMOTE Required. Supported by smart remotes and DSP-100 main units used as

remotes. With a standard remote, results can be obtained by switching the positions of the remote and main unit and retesting.

Length Optional. Supported by all remotes. Without a remote, the limit and pass/fail

result are not shown. Impedance Optional. Supported by all remotes. Attenuation Required. Supported by all remotes. Resistance Optional. Supported by all remotes. Without a remote, the resistance of

cable pairs is reported as “open,” assuming the cable pair is not shorted. RL Required. Supported by all remotes. RL@REMOTE Required. Supported by DSP-2000 smart remote.

ACR Required. Supported by all remotes. Test available only in Autotest mode. ACR@REMOTE Required. Supported by smart remotes and DSP-100 main units used as

remotes. With a standard remote, results can be obtained by switching the

positions of the remote and main unit and retesting. Test is available only in

Autotest mode. PSNEXT

PSNEXT@REMOTE TDR Optional. Supported by all remotes. Without a remote, the end of the cable

TDX Analyzer Recommended. Supported by all remotes. Without a remote, results from

Impulse Noise Recommended. Supported by all remotes. Without a remote, test results

Traffic Monitor Never used.

Required. Supported by DSP-2000 smart remote. Test is available only in

Autotest mode.

is not identified.

tests on short cables may be unreliable.

may not represent the level of noise present on a terminated cable.

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Running a Single Test on Twisted Pair Cable

To run a test as a Single Test, refer to Figure 4-1 and proceed as follows:

RJ45

Jack

CABLE ANALYZER

DSP-2000

2 Meters

TEST

FAULT

INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

WAKE UP

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Test Tool

Patch Panel

Wall Outlet

2 Meters

SMART REMOTE

DSP-2000SR

PASS

TESTING

FAIL

LOW BATTERY

4-4

Smart

Remote

OFF

Figure 4-1. Single Test Connections for Twisted Pair Cable (Model DSP-2000 Shown)

Note

For instructions on running the TDR test or TDX analyzer, or running tests from the MONITOR mode, see the later sections on those topics in this chapter.

Note

The standard remote does not support remote end testing.

gc19f.eps

Running Individual Tests

When to Use a Remote Unit

1. If you are using a DSP-100 main unit as the remote, turn the remote unit’s

rotary switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

2. Use a 2m patch cable of the correct impedance to connect the remote to the far

end of the cable link.

3. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

4. Turn the rotary switch on the main unit to SINGLE TEST.

5. Use a 2m patch cable of the correct impedance to connect the test tool to the

near end of the cable link. On Model DSP-2000, connect to the CABLE TEST jack.

6. Use U D to highlight the test you want to run.

7. Press E to start the highlighted test.

Note

If a remote is required for the test, but is not connected, the test tool displays the message SCANNING FOR REMOTE and does not run the test until a remote is connected.

If the calibration message appears, refer to “Calibrating the Test Tool” in Chapter 6 for complete calibration instructions.

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The TDX Analyzer

The TDX (Time Domain Crosstalk) analyzer displays the locations where crosstalk is occurring on the cable. You can view the test results in a list or plot format. The list format shows the largest crosstalk value detected on the cable. The plot shows all of the crosstalk detected.

The crosstalk values displayed are adjusted to compensate for cable attenuation. The values represent the approximate levels of crosstalk as they appear at the sources of the crosstalk. A level over 50 represents a crosstalk magnitude that exceeds the limit specified by the selected test standard.

The TDX analyzer results are not intended for use in determining if a cable meets specifications; the results are intended to help you locate the sources of crosstalk on a cable. To determine if a cable meets specifications for crosstalk, run the NEXT test.

Running the TDX Analyzer

You can run the TDX analyzer with or without a remote. If you run the analyzer without a remote, the results may be unreliable.

Note

4-6

To run the TDX analyzer, proceed as follows:

1. Turn off any PCs connected to the link you are testing.

2. If you are using a DSP-100 main unit as a remote, turn the remote unit’s

rotary switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

3. If you are testing with a remote, connect the remote to the far end of the cable

link.

4. Turn the rotary switch on the main unit to SINGLE TEST.

5. Verify that the test standard and cable type displayed are correct.

6. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

7. Connect the test tool to the near end of the cable link. On Model DSP-2000,

connect to the CABLE TEST jack.

8. Use D to highlight TDX Analyzer.

9. Press E to run the TDX analyzer.

If the test tool does not detect a remote, the following message appears: NO REMOTE DETECTED. To run the TDX analyzer, press E. To restart the analyzer and scan for the remote again, press T. To return to the first Single Test screen, press e.

TDX Analyzer Results

When the TDX analyzer test is complete, the TDX analyzer results screen appears. Table 4-2 describes the items on the analyzer screen.

Table 4-2. Items on the TDX Analyzer Results Screen

Item Description

Running Individual Tests

The TDX Analyzer

Pairs

Peak

Distance

View Plot

The cable pairs relevant to the results. The highest magnitude of crosstalk measured on the cable pair. A peak over

50 indicates a crosstalk level that exceeds the limit specified by the selected test standard. Crosstalk levels are adjusted to compensate for cable attenuation.

The measured distance from the main unit to the peak crosstalk value. Press to see a plot that shows where crosstalk is detected on the cable.

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Users Manual

TDX Analyzer Plot

To view a TDX analyzer plot for a set of cable pairs, use D U to highlight the pairs, then press #View Plot to see the plot screen for the pairs. Figure 4-2 shows an example of a TDX analyzer plot and Table 4-3 describes the items on the screen.

Figure 4-2. Example of a TDX Analyzer Plot for a Good Twisted Pair Cable Run

3 4

gc20c.eps

4-8

Table 4-3. Items on a TDX Analyzer Plot

Item Description

1 The cable pairs relevant to the results. 2 The distance along the cable under test. The 0 at the left of the scale represents the

location of the main test tool.

3 Magnitude of crosstalk on the cable pair. A peak over 50 indicates a crosstalk level

that exceeds the limit specified by the selected test standard. Crosstalk levels are adjusted to compensate for cable attenuation.

4 The Cursor Readout shows the distance to the crosstalk source at the cursor’s

position. Use L R to move the cursor left or right.

5 Use D U to change the maximum distance of the horizontal scale.

The TDR Test

The TDR (Time Domain Reflectometry) test helps you locate impedance anomalies on a cable by reporting the locations of signal reflections caused by the anomalies.

The test locates anomalies caused by problems such as shorts, opens, poor connections, and mismatches in cable types. You can view the location and size of the anomalies in a list or plot format.

The reflection values displayed are adjusted to compensate for cable attenuation. The values represent the approximate size of the reflections as they appear at the anomalies.

How to Terminate the Cable

You can run the TDR test on twisted pair cable with or without a remote unit, and on coaxial cable with or without a terminator. Table 4-4 describes how termination devices affect the results reported for twisted pair and coaxial cable.

Table 4-4. Effects of Termination on TDR Results

Running Individual Tests

The TDR Test

Cable Type and

Termination

Twisted pair with no termination

Twisted pair with remote

Coaxial cable with no terminator

Coaxial Cable with terminator

Listed Results Show the Following: Plotted Results Show the Following:

Displays the message No Remote Detected. Results show the two largest reflections greater than or equal to 15%. The largest reflection probably comes from the end of the cable, but is not identified as the end.

Two largest reflections greater than or equal to 15%. Largest reflection is identified as the end of the cable.

Two largest reflections greater than or equal to 10%. The largest reflection comes from the end of the cable, but is not identified as the end.

No Reflection reported for a good cable. On a faulty cable, the test reports the two largest reflections, but does not identify end of cable.

All reflections are shown.

All reflections are shown. The largest reflection comes from the end of the cable.

All reflections are shown. The plot will not show a reflection from the terminated end.

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Users Manual

Running the TDR Test on Twisted Pair Cable

To run the TDR test on twisted pair cable, proceed as follows:

1. Disconnect any PCs from the link you are testing.

2. If you are using a DSP-100 main unit as a remote, turn the remote unit’s

rotary switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

3. If you are testing with a remote, connect the remote to the far end of the cable

link.

4. Turn the rotary switch on the main unit to SINGLE TEST.

5. Verify that the test standard and cable type displayed are correct.

6. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

7. Connect the test tool to the near end of the cable link. On Model DSP-2000,

connect to the CABLE TEST jack.

8. Use D to highlight TDR.

9. Press E to run the TDR test.

Running the TDR Test on Coaxial Cable

To run the TDR test on coaxial cable, proceed as follows:

1. Turn off any PC nodes connected to the cable you are testing.

2. If desired, remove the terminator from the far end of the cable.

3. Turn the rotary switch to SINGLE TEST.

4. Verify that the test standard and cable type displayed are correct.

5. Remove any cable connected to the test tool’s unused RJ45 connector.

6. Remove the terminator from the near end of the coaxial cable and connect the

cable to the BNC connector on the test tool. On Model DSP-2000, use the RJ45 to BNC adapter to connect the cable to the CABLE TEST jack.

7. Use D to highlight TDR.

8. Press E to run the TDR test.

4-10

Running Individual Tests

The TDR Test

TDR Results Screen

When the TDR test is complete, the TDR results screen appears. Table 4-5 describes the items on the screen.

Table 4-5. Items on a TDR Results Screen (Twisted Pair Results)

Item Description

Pair The cable pair relevant to the results. Not shown for coaxial cable results. Distance The first distance is the measured distance from the test tool to the end of the

cable. The second distance, if shown, is the distance from the test tool to the beginning of the largest anomaly that caused a reflection greater than the limit defined by the selected test standard.

Peak The percentage of the test signal reflected at the peak of the anomaly.

# View Plot Press to see a plot of the locations and reflection percentages of the

impedance anomalies detected.

Note

It is possible for impedance anomalies to be detected when testing from one end of the cable, but not from the other end. This discrepancy is caused by attenuation of the signal reflections returning from the anomaly.

TDR Plot Screen

To view the TDR plot for a cable pair, use D U to highlight one of the pairs; then press #View Plot to see the plot screen for that pair. Figure 4-3 shows an example of a TDR plot and Table 4-6 describes the items on the plot.

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DSP-100/2000

Users Manual

5 6

Figure 4-3. Example of a TDR Plot (Twisted Pair Results)

Table 4-6. Items on a TDR Plot (Twisted Pair Results)

Item Description

1 The cable pair relevant to the results. 2 The peak value as reported on the results screen.

gc21c.eps

3 The distance along the cable under test. The 0 at the left of the scale represents the location

of the main test tool.

4 The distance to the end of the cable as reported on the results screen. 5 The percentage of reflected signal relative to the size of the TDR test signal. Positive values

indicate locations on the cable where the impedance is higher than the cable’s characteristic impedance. Negative values indicate locations on the cable where the impedance is lower than the cable’s characteristic impedance.

6 The Cursor Readout shows the location and the reflection percentage at the cursor’s

position. Use L R to move the cursor left or right.

7 Use D U to change the maximum distance of the horizontal scale.

Single Test Results for Twisted Pair Cable

The Single Test results for twisted pair cable are identical to those displayed by an Autotest, with exceptions noted in the following paragraphs.

Tests not required by the selected test standard produce a Warning result when

measured values exceed the test’s limits.

4-12

Wire Map

Wire map results are identical to the Autotest version. See “Wire Map” in Chapter 3 for details. The Single Test version of the wire map test includes the scanning function.

Length

If a remote is connected, the length test and results are identical to the Autotest version. See “Length” in Chapter 3 for details.

If a remote is not connected, the test tool displays the message NO REMOTE DETECTED, and the limit and result columns are not shown. If the length of a cable pair cannot be determined, the length value on the display is blank and WARNING appears in the result column.

NEXT and NEXT@REMOTE

The NEXT test and results are identical to the Autotest version. See “NEXT” in Chapter 3 for details.

The NEXT@REMOTE test is available only when using a second main DSP-100 unit or a smart remote as a remote unit. Remote end testing must be enabled on the main unit. The NEXT@REMOTE test and results are identical to the Autotest version. See “NEXT@REMOTE” in Chapter 3 for details.

Running Individual Tests

Single Test Results for Twisted Pair Cable

Impedance

The impedance test and results are identical to the Autotest version. See “Impedance” in Chapter 3 for details.

Attenuation

The attenuation test and results are identical to the Autotest version. See “Attenuation” in Chapter 3 for details.

Resistance

If a remote is connected, the results displayed are identical to the display in Autotest. See “Resistance” in Chapter 3 for details.

If a remote is not connected, the test tool displays the message NO REMOTE DETECTED and all pair resistances are reported as OPEN. A cable pair with a resistance greater than 400Ω is also reported as OPEN.

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DSP-100/2000

Users Manual

Return Loss (RL) and RL@REMOTE

The RL test is identical to the Autotest version. See “Return Loss” in Chapter 3 for details.

The RL@REMOTE test is available only when using a DSP-2000 with a DSP2000 smart remote. Remote end testing must be enabled on the main unit. See "RL@REMOTE" in Chapter 3 for details.

Single Tests for Coaxial Cable

The Single Test mode on the rotary switch allows individual execution of the coaxial cable tests available in the Autotest mode. The TDR test is also available as a Single Test for coaxial cable.

The coaxial cable tests available as Single Tests produce results displayed in the same format as displayed in the Autotest mode.

Running a Single Test on Coaxial Cable

For instructions on running the TDR test, see the earlier section

“The TDR Test.” For instructions on running tests in the MONITOR mode, see the later section “Monitoring Network Activity.”

Note

4-14

To run a Single Test on coaxial cable, refer to Figure 4-4 and proceed as follows:

1. Turn off any PC nodes connected to the cable you are testing.

2. If you want to measure cable length, remove the terminator from the far end of

the cable you are testing.

3. Turn the rotary switch to SINGLE TEST.

4. Verify that the test standard and cable type are correct. You can change these

settings in the SETUP mode.

5. Remove any cable connected to the test tool’s unused RJ45 connector.

6. Remove the terminator from the near end of the coaxial cable and connect this

end of the cable to the BNC connector on the test tool. On Model DSP-2000, use the RJ45 to BNC adapter to connect the cable to the CABLE TEST jack.

7. Use U D to highlight the test you want to run.

8. Press E to start the highlighted test.

Running Individual Tests

Single Tests for Coaxial Cable

12345678

For Length Test, remove far-end Terminator

BNC “T”

Connector

CABLE ANALYZER

DSP-2000

Test Tool

TEST

FAULT

INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Figure 4-4. Single Test Connections for Coaxial Cable (Model DSP-2000 Shown)

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Single Test Results for Coaxial Cable

The Single Test results for coaxial cable are identical to those displayed by an Autotest, with exceptions noted as follows.

Impedance

Identical to Autotest version. See “Impedance” in Chapter 3 for details.

Resistance

Identical to Autotest version. See “Resistance” in Chapter 3 for details. The Single Test version of the resistance test includes the scanning function.

Length

Identical to Autotest version. See “Length” in Chapter 3 for details.

TDR for Coaxial Cable

The TDR test is described for both twisted pair and coaxial cable in the earlier section “The TDR Test.”

Monitoring Network Activity

The MONITOR mode on the rotary switch allows you to monitor Ethernet traffic for collisions, jabber, peak traffic and percentage of network utilization. You can monitor traffic on 10BaseT twisted pair or 10Base2 coaxial cable. Model DSP2000 can monitor traffic on 10/100BaseTX cable as well.

This feature allows you to identify active cables and provides some information on network activity. If you want to troubleshoot active networks, contact your Fluke representative for information on LAN diagnostic tools.

When connected to a network, the test tool automatically generates link pulses to activate the hub. Model DSP-2000 uses Auto-Negotiation when attempting to link to monitor 10/100BaseTX traffic. If a link state with the hub does not occur, the test tool displays the warning message NO LINK PULSE.

To monitor network traffic on a twisted pair or coaxial Ethernet network, refer to Figure 4-5 and proceed as follows:

4-16

Running Individual Tests

Monitoring Network Activity

WCaution

When using a coaxial T-connector to connect the test tool to a network, never allow the T-connector to touch a conductive surface. Such contact could disrupt net work operation by creating a ground loop.

Note

To extend battery life, use the ac adapter/charger when monitoring network traffic for extended periods. While monitoring network

traffic, the test tool’s automatic power-down function is disabled.

Test Tool

12345678

RJ45

Jacks

12345678

BNC

Connection

Shown

Test Tool

CABLE ANALYZER

DSP-2000

TEST

SAVE

FAULT

INFO

ENTER

EXIT

MONITOR

SINGLE

SETUP

TEST

AUTO

TEST

SPECIAL

OFF

FUNCTIONS

SMART REMOTE

Figure 4-5. Connections for Monitoring Network Traffic (Model DSP-2000 Shown)

gc23f.eps

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1. Turn the rotary switch to MONITOR.

2. Use D to highlight either 10BaseT Traffic on RJ45

(10/100BaseTX Traffic on RJ45 on Model DSP-2000) or 10Base2 Traffic on BNC.

3. Remove any cable connected to the test tool’s unused test connector.

4. Use a patch cable of the correct impedance to connect the test tool to the

network as shown in Figure 4-5. On Model DSP-2000, connect to the jack indicated by the arrow at the top of the display. Use the RJ45 to BNC adapter if necessary.

5. Press T to start the traffic test.

6. When using Model DSP-2000, use the #10T Only or

#100TX Only softkey to select traffic monitoring at 10 Mb/s or 100 Mb/s.

If you don't know which speed to use, and the test tool is not already trying to link using Auto-Negotiation, press #until the display reads Auto-Negotiation. This causes the test tool to select the proper speed to match the hub.

As the traffic test runs, the results shown on the test tool’s display are updated every second. Table 4-7 describes the items on the screen.

4-18

Table 4-7. Items on the Traffic Monitor Screen

Item Description

Running Individual Tests

Monitoring Network Activity

Utilization

Last 1

second

Utilization

Average

Utilization

Peak

Collisions

Last 1

second

Collisions

Average

Collisions

Peak

Bottom of screen

! Sound On

@ Sound Off

Percentage of the network’s transmission bandwidth used over the last 1 second. Utilization includes correct frames, collisions, and jabber. The percentage indicates the current traffic density.

The average of all the 1-second utilization percentages since the start of the test.

The highest 1-second utilization percentage recorded since the start of the test.

The percentage of collision frames as compared to the total number of frames detected in the last 1 second. Collisions are counted when runt packets are detected.

The average of all the 1-second collision percentages since the start of the test.

The highest 1-second collision percentage recorded since the start of the test.

If jabber is detected, the message Jabber Detected appears in this space. A jabber is reported if a frame is detected to be larger than the maximum legal size. If no link pulse is detected, the message NO LINK PULSE appears in this space.

Activates and deactivates a sound that represents network activity.

$Stop

Test

Stops the traffic test and freezes the screen. To restart the traffic test, press T.

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DSP-100/2000

Users Manual

Identifying Hub Port Connections

The hub port locator helps you determine which port a cable is connected to at a hub. The locator sends a link pulse to the hub, causing the port’s LED to blink.

To identify a hub port connection, proceed as follows:

1. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

2. Use a patch cable of the correct impedance to connect the test tool to the

network connection. On Model DSP-2000, connect to the MONITOR jack.

3. Turn the rotary switch to MONITOR.

4. Use D to highlight the hub port locator selection; then press E.

5. Locate the connected port by finding the flashing LED on the hub’s LED

panel.

Monitoring Impulse Noise

The Monitor Impulse Noise function allows you to monitor electrical noise on inactive twisted pair cable. Pair 3, 6 is monitored.

The noise test takes noise voltage samples every second. Voltages that exceed the

impulse noise threshold are regarded as noise “hits.” If the 10BaseT standard is selected, the noise test results include a pass or fail indication. A fail result is displayed if more than two noise hits are detected in a 10-second interval.

Changing the Impulse Noise Threshold

You can set the impulse noise threshold to a value from 100 to 500 mV in increments of 10 mV. The default noise threshold value is 270 mV.

To change the noise threshold, proceed as follows:

1. Turn the rotary switch to SETUP.

2. Press $ Page Down once.

3. Use D to highlight the impulse noise threshold setting.

4. Press ! Choice.

5. Use # DEC or $INC to change the threshold.

6. Press E to store the threshold setting.

4-20

Running the Impulse Noise Test

The connector type for the noise test is always RJ45. The noise test is not valid for coaxial cable because the level of noise on coaxial cable is negligible.

To monitor impulse noise, refer to Figure 4-6 and proceed as follows:

RJ45

Jack

CABLE ANALYZER

DSP-2000

2 Meters

TEST

FAULT INFO

EXIT

AUTO TEST

OFF

SAVE

ENTER

WAKE UP

MONITOR

SINGLE

SETUP

TEST

SPECIAL FUNCTIONS

SMART REMOTE

Test Tool

Patch Panel

Running Individual Tests

Monitoring Impulse Noise

Wall Outlet

2 Meters

SMART REMOTE

DSP-2000SR

PASS

TESTING

FAIL

LOW BATTERY

Smart

Remote

OFF

Figure 4-6. Connections for Monitoring Impulse Noise (Model DSP-2000 Shown)

gc24f.eps

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Users Manual

Note

To extend battery life, use the ac adapter/charger when monitoring impulse noise for extended periods. While monitoring impulse noise,

the test tool’s automatic power-down function is disabled.

Note

Monitoring impulse noise without a remote connected may produce unreliable test results.

1. If you are using another main unit as the remote, turn the remote unit’s rotary

switch to SMART REMOTE. If you are using a smart remote unit, turn its rotary switch to ON.

2. Use a 2m patch cable of the correct impedance to connect the remote to the far

end of the cable link.

3. On Model DSP-100, remove any cable connected to the test tool’s BNC

connector.

4. Turn the rotary switch to MONITOR.

5. Use D to highlight Impulse Noise on RJ45.

6. Use a 2m patch cable of the correct impedance to connect the test tool to the

near end of the cable link. On Model DSP-2000, connect to the CABLE TEST jack.

4-22

7. Press T to start the noise test.

Noise Test Results

As the noise test runs, the displayed test results are updated every second after the first 10-second sample period. Table 4-8 describes the items on the screen.

Item Description

Running Individual Tests

Determining Hub Port Capabilities (Model DSP-2000)

Table 4-8. Items on the Noise Monitor Screen

Impulse Noise

Threshold

Noise Test The overall result of the noise test. Displayed only when 10BaseT is

Average The average number of noise hits per second since the start of the test.

Peak The highest number of noise hits per second and the time at which the peak

$Stop Test Stops the noise test and freezes the screen. To restart the noise test, press

The minimum level of noise that is considered to be a noise hit. The default threshold is 270 mV. If you want to change the fault threshold, see the earlier

section “Changing the Impulse Noise Threshold.”

selected. A PASS result means that no 10-second intervals included more than two noise hits. A FAIL result means that more than two noise hits were detected during a 10-second interval.

was recorded.

Determining Hub Port Capabilities (Model DSP-2000)

This test determines if a hub supports the following standards:

• Auto-Negotiation

• 10BaseT

• 100BaseTX

• 100BaseT4

• 100BaseTX Full Duplex

• 10BaseT Full Duplex

To determine hub port capabilities, proceed as follows:

1. Use a patch cable of the correct impedance to connect the network connection

to the test tool’s MONITOR jack.

2. Turn the rotary switch to MONITOR.

3. Use D to highlight HUB Port Capabilities; then press E.

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Using the Tone Generator (Model DSP-2000)

If you have an inductive pickup device, you can use the test tool’s tone generator to identify cable runs and connections. The tone generator produces a signal on the cable under test. You can hear the signal as an audible tone when you place an inductive pickup device near the cable or one of the cable’s connectors.

To use the tone generator, proceed as follows:

1. Turn the rotary switch to SPECIAL FUNCTIONS.

2. Use a patch cable of the correct impedance to connect the test tool to the

CABLE TEST jack.

3. Use D to highlight Tone Generator; then press E.

4. Use an inductive pickup device along the cable run or at far end connectors to

determine which cable is connected to the test tool.

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Atec DSP-2000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

LIMITED WARRANTY & LIMITATI O N OF LIABILITY

Table of Contents

List of Tables

List of Figures

Overview of Features

Introduction

Standard Accessories

Using This Manual

Getting Started

Safety and Operational Information

Quick Start

Powering the Test Tool

Using the Menus

Quick Configuration

Results within Accuracy Range

Autotest on Twisted Pair Cable

Autotest on Coaxial Cable

Main Unit Features

Remote Features

Strap and Bail

Rotary Switch

Autotest

Single Test

Monitor

Setup

Print

Special Functions

Smart Remote (Model DSP-100)

Turning On the Test Tool

Selecting a Language for Displays and Reports

Performing a Self-Test

Overvoltage Test

Noise Test

Configuring the Test Tool

Controlling the Backlight

Adjusting the Display Contrast

Selecting a Power Line Filter Frequency

Selecting a Test Standard and Cable Type

Selecting an Average Cable Temperature

Selecting a Conduit Setting

Selecting a Length Unit

Selecting a Numeric Format

Setting the Date and Time

Setting the Power-Down Timer

Enabling or Disabling the Audible Tones

Remote Lights, Messages, and Audible Tones

Remote End Testing

Remote Communication Error

Battery Status

Battery Status Display

Autotest Softkeys

Autotest

Autotest on Twisted Pair Cable

Link Performance Grade Result (Headroom)

Automatic Diagnostics (Model DSP-2000)

Autotest Results for Twisted Pair Cable

Wire Map Test

Resistance

Length

Propagation Delay and Delay Skew

Characteristic Impedance

Attenuation

NEXT Test

NEXT@REMOTE Results

ACR Results

ACR@REMOTE

Return Loss (RL)

RL@REMOTE (Model DSP-2000)

PSNEXT (Power Sum NEXT; Model DSP-2000)

Autotest on Coaxial Cable

Autotest Results for Coaxial Cable

Characteristic Impedance

Resistance

Length

Anomaly

Saving Autotest Results