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Blackbox SCAN-LAN Vt TS Series Manual

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© Copyright 2000. Black Box Corporation. All rights reserved.
1000 Park Drive
•
Lawrence, PA 15055-1018
•
724-746-5500
•
Fax 724-746-0746

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  • Page 1 © Copyright 2000. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...
  • Page 2 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 SUPPORT Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...

  • Page 3: Table Of Contents

    SCAN-LAN Vt Contents Chapter Page 1. Specifications....................7 2. Introduction...................11 2.1 Packing List.................11 2.2 Features ..................12 2.2.1 Testing Features ............12 2.2.2 Special Features of the SCAN-LAN Vt......12 2.2.3 Send Function...............14 2.2.4 LinkTalk Function............15 2.2.5 Performance Module............15 2.3 Battery Information ..............16 2.3.1 Memory Storage ............16 2.3.2 Charging Mode.............16 2.3.3 Changing the Batteries..........17 2.3.4 Using the Rechargeable Battery Eliminator ....17...
  • Page 4 CONTENTS Chapter Page 4. Autotest....................27 4.1 Running Autotest................27 4.2 Viewing Autotest Results............28 4.2.1 Summary Results ............29 4.2.2 Marginal Test Results ...........29 4.2.3 Detailed Results ............30 4.3 Saving Autotest Results...............30 4.4 LinkTalk ..................33 4.4.1 Interaction of Talk and Send Functions ......34 4.4.2 System Integrity Pre-Test..........35 5.
  • Page 5 SCAN-LAN Vt Chapter Page 6.6 Noise ...................51 6.6.1 Running Noise..............52 6.6.2 Viewing Noise Results ..........53 6.7 Pair Reversal Test...............53 6.8 Repeatability Test ...............54 6.9 Impedance..................55 6.10 Cable Toner................56 6.11 Delay/Delay Skew................57 6.12 Resistance..................59 6.12.1 Running Resistance ............59 6.12.2 Viewing Resistance Results...........60 6.13 Power Sum NEXT..............61 6.13.1 Viewing Power Sum NEXT Results ......62 6.13.2 Viewing a Graph of Power Sum NEXT Results ..63...
  • Page 6 CONTENTS Chapter Page 8.2 Twisted-Pair Test Descriptions ..........75 8.2.1 Wire Map ..............75 8.2.2 Near-End Crosstalk (NEXT) ........80 8.2.3 Attenuation ..............85 8.2.4 Length................87 8.2.5 Noise ................92 8.2.6 Impedance ..............93 8.2.7 Resistance..............94 8.3 Testing Tips................95 8.3.1 Selecting Performance Module (PM) and Cable Specification ..............95 8.3.2 Connecting the Segment Under Test ......95 8.3.3 Selecting the Proper Test ..........96...
  • Page 7 SCAN-LAN Vt Chapter Page 10. Calibration....................120 10.1 NVP Calibration ...............120 10.1.1 Using a Known Length of Cable ........120 10.1.2 Using Manufacturer’s Cable Specifications....121 10.1.3 Why Do I Need to Set Cable NVP?......122 10.2 Remote-Unit Calibration............122 10.3 Performance-Module Calibration ..........124 10.4 Impedance Calibration.............126 10.5 Resistance Calibration ..............127 10.6 Main-Unit Calibration ..............127 11.

  • Page 8: Specifications

    CHAPTER 1: Specifications 1. Specifications General 128 x 64 pixel backlit graphic LCD Display: 10-position rotary function selector; Elastomeric Operating Controls: keypad Operator Enabled/Disabled Audible Alarm: Directive 89/336/EEC per TCF D2D/EMC/CC/128/96 Compliance: 32 to 122°F (0 to 50°C) Operating Temperature: -4 to +140°F (-20 to +60°C) Storage Temperature: 10 to 90%, noncondensing...
  • Page 9 SCAN-LAN Vt 60 or 50 Hz Output: 12 or 14 VDC Frequency: 2 years Lithium Coin Cell (Autotest Results Storage) Life: Performance Modules Performance Module inputs withstand telco ring voltages; 175V peak, 20–60 Hz superimposed on 56 VDC, maximum. They also withstand electrostatic discharges per IEC 801-2 severity level 4 (8KV contact).
  • Page 10 CHAPTER 1: Specifications Attenuation-to-Crosstalk Ratio ACR is calculated for each pair over the full frequency range per test specification selected Serial Port DB9 male (pins) Connector: Null modem, DB9 female (socket) to DB9 female (socket) and PC Cable: DB25 female serial port pin assignments: 1 No connection 2 Receive data (input) SERIAL PORT...
  • Page 11 SCAN-LAN Vt Near-End Crosstalk (NEXT) and Attenuation • Tests NEXT for all six pair combinations • Tests NEXT at both ends • Tests Attenuation of all four pairs one way 1 to 100 MHz Frequency Range: With Modular Plug Performance NEXT and Attenuation Accuracy: Module (TS691 or TS691E), exceeds requirements of TIA TSB-67 for Level-II Accuracy...

  • Page 12: Introduction

    CHAPTER 2: Introduction 2. Introduction The SCAN-LAN Vt is a testing system that troubleshoots and certifies LAN cable installations. The SCAN-LAN Vt consists of two handheld units, one functioning as a main unit, and the other as a remote unit. It also features LinkTalk voice communications across twisted-pair test links.

  • Page 13: Features

    SCAN-LAN Vt 2.2 Features 2.2.1 T ESTING EATURES •Tests UTP, ScTP, coaxial, STP, and fiberoptic cable. •Certifies twisted-pair cable up to EIA/TIA 568A Category 5 and ISO/IEC 11801 Class D (100 MHz). •Performs NEXT, Length, Wire Map, Attenuation, Noise, Traffic, Impedance, and Resistance tests.
  • Page 14 CHAPTER 2: Introduction Performance Module plugs in for user- selectable cable test configurations. Function buttons (F1, F2, F3, and F4) are software defined. Their operation depends on the selected function, as indicated by the labels in the display. Up and down arrows scroll through menus and change cable test standards.

  • Page 15: Send Function

    SCAN-LAN Vt Tests and functions accessible using the rotary dial are described below. AUTOTEST PRINT QUICK WIRE SETUP LENGTH EXTENDED TRAFFIC FUNCTIONS REMOTE Figure 2-2. Function Dial. Dial Position Function AUTOTEST Performs a preprogrammed set of tests, which are required to certify a cable installation.

  • Page 16: Linktalk Function

    CHAPTER 2: Introduction screen you want to transmit is displayed, press the corresponding soft function key. For example, in the figure below, you would press F1 to send the results. 2.2.4 L UNCTION The LinkTalk function allows two-way voice communication between the main unit and the remote.

  • Page 17: Battery Information

    SCAN-LAN Vt Performance Module Figure 2-3. Module Removal. BEWARE OF STATIC ELECTRICITY! The SCAN-LAN Vt contains static-sensitive electronics inside the main body. Use appropriate precautions when removing and installing performance modules. 2.3 Battery Information The SCAN-LAN Vt handheld is shipped with 8 AA alkaline batteries per unit.

  • Page 18: Changing The Batteries

    CHAPTER 2: Introduction 2.3.3 C HANGING THE ATTERIES To change the SCAN-LAN Vt’s batteries: 1.Remove the battery-compartment cover on the back (refer to Figure 2-4) by pushing the tab in and then up. 2.Remove the batteries. 3.Install new batteries. Pay attention to the polarity markings on the inside of the battery well.

  • Page 19: Display Conventions

    SCAN-LAN Vt One of the advantages of a NiMH battery is that it does not have the “memory” . You do need to completely discharge or characteristics of a NiCd battery cycle the battery to maintain full capacity. Like NiCd batteries, the NiMH batteries do self-discharge over time. After storage for several weeks, they may have only a fraction of their initial charge.

  • Page 20: Scroll Bars

    CHAPTER 2: Introduction To change a selection, 1.Press the up or down arrow keys to scroll through the available selections. 2.When the choice you want is highlighted, press SAVE (F4) or ENTER. 2.4.2 S CROLL When there are more selections available than can fit on one SCAN-LAN Vt screen, scroll bars will appear.

  • Page 21: Getting Started

    SCAN-LAN Vt 3. Getting Started This chapter provides a brief overview of how to use the SCAN-LAN Vt for testing twisted-pair cabling. It is intended for users with prior cable-testing experience who want to get started quickly. It covers only the basics of initial setup, connections to the cable, and the Autotest function.

  • Page 22: Nvp Calibration

    CHAPTER 3: Getting Started 6. When the test has completed, the remote unit’s screen will show either PASS or FAIL. If the test passes, the remote unit displays: If the test does not pass, the remote unit displays: 3.1.2 NVP C ALIBRATION A typical NVP value will be automatically selected by the SCAN-LAN Vt, depending on the test standard that you choose.

  • Page 23: Typical Test Setup

    SCAN-LAN Vt Using the default value, however, may result in cable-length measurement errors of up to 7%, due to the variation in the signal-propagation rate from cable to cable. This potential length error usually won’t impair troubleshooting of a prior working cable segment unless the length measurement of a cable is close to the test limit (for example 100 meters on a 10BASE-T segment).

  • Page 24: Channel Testing

    CHAPTER 3: Getting Started 3.2.2 C HANNEL ESTING Figure 3-2 illustrates a typical test setup using a SCAN-LAN System to test a Channel as defined by TIA/EIA TSB-67. Wall Outlet Transition Connector User's User's Equipment Equipment Cord Cord Horizontal Wiring SCAN-LAN SCAN-LAN Cross Connect...

  • Page 25: Selecting A Cable Test Standard

    SCAN-LAN Vt 3.3 Selecting a Cable Test Standard The Cable Test Standard used by the SCAN-LAN Vt to certify cables may be changed whenever the up/down arrows symbol appears next to the cable name. (See the illustration below.) AUTOTEST NEXT 100% CAT5 Basic Link To select a different cable test standard:...
  • Page 26 CHAPTER 3: Getting Started The tests performed and the PASS/FAIL limits are set by copying one of the existing cable test standards. The customization consists of selecting which pairs will be included in the test and whether or not the shield is required to be present for the Wire Map to PASS.

  • Page 27: System Integrity Pre-Test

    SCAN-LAN Vt Select Pairs: PAIR 1 (1-2) PAIR 2 (3-6) PAIR 3 (4-5) PAIR 4 (7-8) SHIELD DESELECT SAVE 6.Press SAVE (F4) or ENTER to save the custom standard. To cancel, press ESC. NOTE Matching custom cable definitions must be created on both units. 3.5 System Integrity Pre-Test Before testing an installation, the integrity of the SCAN-LAN Vt system may be checked by running these tests.

  • Page 28: Autotest

    CHAPTER 4: Autotest 4. Autotest Autotest is a preprogrammed set of tests which are required to certify a cable installation. All of the tests performed by Autotest can also be performed individually. Autotest performs these tests: Wire Map, Near-End Crosstalk (NEXT) at both ends for Two-Way testing, Attenuation, ACR, and Length.

  • Page 29: Viewing Autotest Results

    SCAN-LAN Vt 3. Press Start (F1) to re-start Autotest. Press VIEW (F3) to review Autotest test results. AUTOTEST PASS CAT3 Channel1 START TALK VIEW SAVE 4. Press SAVE (F4) or ENTER to save the Autotest test results. 5. Press TALK (F2) to ring the Remote Unit at the other end. NOTE If the SCAN-LAN Vt fails any test, it will stop and display the failure.

  • Page 30: Summary Results

    CHAPTER 4: Autotest 4.2.1 S UMMARY ESULTS 1. Press View (F3) from the Autotest results screen. (Press the arrow keys to view additional summary test-result screens.) Pair combinations 2. Press SAVE (F4) or ENTER at any time to save the Autotest results. 3.

  • Page 31: Detailed Results

    SCAN-LAN Vt 2. Recheck the link installation, focusing on connection points. Refer to , for suggestions on causes for Chapter 8, Testing Twisted-Pair Cable excessive NEXT and attenuation. Correct the installation if possible, and retest. 4.2.3 D ETAILED ESULTS Some test-result screens (for example, the NEXT summary screen) have a DETAIL softkey that you can press to view more information about the test results.
  • Page 32 CHAPTER 4: Autotest To save Autotest results: 1. Press Save (F4) or ENTER, from the Autotest Summary screen or any VIEW screen. The SCAN-LAN Vt automatically selects the next report number. You can change the number by pressing the arrow keys. 2.
  • Page 33 SCAN-LAN Vt NTERING A IRCUIT DENTIFICATION To change circuit identification: 1. The SCAN-LAN Vt will display a default circuit identification unless the circuit ID is disabled by the Setup routine. To speed up entering circuit identifiers, the SCAN-LAN Vt can automatically increment the last circuit identifier.

  • Page 34: Linktalk

    CHAPTER 4: Autotest 4.4 LinkTalk LinkTalk temporarily converts the SCAN-LAN Vt system to an audio- communication system. LinkTalk enables bi-directional, one-way (half- duplex) voice communication between the main unit and the remote. 1. Attach earphones to the jacks on the lower right sides of both main and remote units.

  • Page 35: Interaction Of Talk And Send Functions

    SCAN-LAN Vt 4. Press PUSH TO TALK (F4) on either the main or remote to talk to the other person at the other end of the cable. LinkTalk LISTEN Volume: PUSH TO TALK 5. Press the arrow keys to adjust earphone volume up or down. 6.

  • Page 36: System Integrity Pre-Test

    CHAPTER 4: Autotest 4.4.2 S YSTEM NTEGRITY Before testing an installation, the integrity of the SCAN-LAN Vt system may be checked by running the tests described below. To pre-test your system: 1. Connect the main and remote units using a CAT3 coupler or a patch cable.

  • Page 37: Quick Check

    SCAN-LAN Vt 5. Quick Check Quick Check is an abbreviated Autotest, designed to be completed in less than 10 seconds. It’s used for quick installation checks. Quick Check performs these tests on twisted-pair cables: Wire Map, Near- End Crosstalk (NEXT) at both ends for Two-Way testing, Attenuation, ACR, and Length.

  • Page 38: Viewing Quick Check Results

    CHAPTER 5: Quick Check 5.2 Viewing Quick Check Results Viewing the results of Quick Check is the same as for Autotest, except that they cannot be saved. Refer to Section 4.2 ARGINAL ESULTS A PASS* or FAIL* result indicates that a measured NEXT or attenuation value is close enough to the Test Standard that it is within the SCAN-LAN Vt’s measurement uncertainty.

  • Page 39: Cable Test Descriptions

    SCAN-LAN Vt 6. Cable Test Descriptions This chapter describes each test, and how to run each test individually. Refer to , for detailed test results Chapter 8, Testing Twisted-Pair Cable interpretation and more troubleshooting tips. While it is usually recommended to use Autotest for most cable testing, individual cable tests may be useful in troubleshooting specific cable problems.

  • Page 40: Viewing Wire Map Results

    CHAPTER 6: Cable Test Descriptions All four pairs will be tested and the results displayed, even if the selected test standard does not require all the pairs to be tested. However, a PASS/FAIL determination is based only on the pairs required by the selected cable-test standard.

  • Page 41: Next

    SCAN-LAN Vt Short Open 6.2 NEXT NEXT (Near-End Crosstalk) is a measure of noise coupled between two twisted pairs measured at the same end of the cable as the disturbing signal source. NEXT is measured using all pair combinations when testing a twisted-pair cable.

  • Page 42: Running Next

    CHAPTER 6: Cable Test Descriptions 6.2.1 R NEXT UNNING 1. Connect one end of the cable under test to the SCAN-LAN Vt and the other end to the remote unit. Set the remote unit’s dial to REMOTE. 2. Set the dial to EXTENDED FUNCTIONS. 3.

  • Page 43: Marginal Test Results

    SCAN-LAN Vt 6.2.3 M ARGINAL ESULTS A PASS* or FAIL* result indicates that a measured NEXT value is close enough to the Test Standard that it is within the SCAN-LAN Vt’s measurement uncertainty. As a result, the PASS or FAIL judgment is uncertain, and therefore the SCAN-LAN Vt cannot determine with confidence whether the link conforms to the Test Standard.

  • Page 44: Viewing A Graph Of Next Results

    CHAPTER 6: Cable Test Descriptions 2. Press SEND (F1) to send the results to the remote unit. 3. Press SUMMARY (F3) or ESC to return to the summary screen. 6.2.5 V NEXT R IEWING A RAPH OF ESULTS 1. From the detail or Summary Results screen, press GRAPH (F2). Cursor Test Limit Test Result...

  • Page 45: Length

    SCAN-LAN Vt 6.3 Length The Length test measures the cable length and the distance to a cable fault, such as a short, open, or impedance change. The Length test locates significant impedance changes or anomalies in a cable segment that may be caused by cable damage or inadequate connections at patch panels, cross-connect blocks, 8-position modular-plug connectors, or wall plates.

  • Page 46: Viewing Length Results

    CHAPTER 6: Cable Test Descriptions 6.3.2 V IEWING ENGTH ESULTS At the completion of the Length test, the screen displays the summary results. Pair Length 1. Press START (F1) to restart the Length test. 2. Press DETAIL (F3) to view more information about the Length test results.
  • Page 47 SCAN-LAN Vt 5. OPEN or SHORT usually indicates that a pair ends in an open or a short. However, if the remote unit is used, an OPEN result should be displayed for each pair. 6. Propagation Delay is the time in nanoseconds for a pulse to travel the length of a twisted pair.

  • Page 48: Attenuation

    CHAPTER 6: Cable Test Descriptions 6.4 Attenuation Attenuation measures the reduction in the signal level as it travels over the length of a cable. Attenuation is measured over a range of frequencies. The amount of attenuation loss is expressed in decibels (dB). A signal is transmitted by the remote unit and received by the main unit (the signal is one-way).

  • Page 49: Viewing Attenuation Results

    SCAN-LAN Vt 6.4.2 V IEWING TTENUATION ESULTS To view the test-standard specification values: 1. Press SPEC (F3). Test Specifications 2. Press SEND (F1) to restart the Attenuation test.

  • Page 50: Viewing A Graph Of Attenuation Results

    CHAPTER 6: Cable Test Descriptions 6.4.3 V IEWING A RAPH OF TTENUATION ESULTS 1. From the test summary screen, press GRAPH (F2) to view the graph of the Attenuation test results. Cursor Test Result Test Limit 2. Press PAIR (F1) to display an Attenuation graph for a different pair. 3.

  • Page 51: Acr

    SCAN-LAN Vt 1. Reduce the measurement uncertainty. If you are currently using a Level I-rated Performance Module (PM), replace it with a Level II- rated PM and retest. If the test result is still marginal, or if you are already using a Level II-rated PM, go to the next step. 2.

  • Page 52: Viewing Acr Results

    CHAPTER 6: Cable Test Descriptions 3. Press ENTER. The test begins scanning immediately. (Press the arrow keys to select another cable test standard.) 6.5.2 V ACR R IEWING ESULTS For each pair combination the ACR is displayed along with the frequency. The attenuation value used is from the receive pair (for example, pair 3,6 of 12/36).

  • Page 53: Running Noise

    SCAN-LAN Vt Noise results for all selected cable types are compared to the IEEE 802.3 10BASE-T impulse noise specification. The default noise-threshold setting is 260 mV. Refer to , for information on how to change Chapter 9, Setup this value. Noise reports time duration of the test, average number of impulses in the last second, peak number of impulses in any one second, and the time of occurrence since the start of the test.

  • Page 54: Viewing Noise Results

    CHAPTER 6: Cable Test Descriptions 6.6.2 V IEWING OISE ESULTS The display provides a continuously updated, real-time report illustrated by the following figure: NOTE When testing a 10BASE-T cable per the IEEE 802.3 specification, the maximum allowable impulse-noise rate is 0.2 impulses per second with a 260-mV noise threshold.

  • Page 55: Repeatability Test

    SCAN-LAN Vt PAIR REVERSAL UNNING 1. Connect one end of the cable under test to the SCAN-LAN Vt and the other end to the remote unit. Set the remote unit’s dial to REMOTE. 2. Set the dial to EXTENDED FUNCTIONS. 3.

  • Page 56: Impedance

    CHAPTER 6: Cable Test Descriptions UNNING EPEATABILITY 1. Connect one end of the cable under test to the SCAN-LAN Vt and the other end to the remote unit. Set the remote unit’s dial to REMOTE. 2. Set the dial to EXTENDED FUNCTIONS. 3.

  • Page 57: Cable Toner

    SCAN-LAN Vt EXTENDED FUNCTIONS Attenuation Noise Impedance Resistance Cable Toner 3. Press ENTER to select the test. The test begins immediately. Press ESC to abort the test. (Press the arrow keys to change the cable test standard.) NOTE The cable should not be connected to an active network during the Impedance test.

  • Page 58: Delay/Delay Skew

    CHAPTER 6: Cable Test Descriptions EXTENDED FUNCTIONS Attenuation Noise Impedance Resistance Cable Toner 4. Press ENTER. Press ESC to abort the test. (Press the arrow keys to select another cable test standard.) NOTE When the AUTO TONER is ON, the toner function is activated whenever a remote is not attached and the main unit is set to Quick Check or A u t o t e s t .
  • Page 59 SCAN-LAN Vt Pair 1 Pair 2 Pair 3 Pair 4 Delay Delay Skew Delay and Delay Skew are tested only during an Autotest or Quick Check. They are included in Autotest for the enhanced cable standards (for example, CAT5 Plus BasicLink). These tests can be added to Autotest or Quick Check for any other cable standard by defining a custom cable standard (see Appendix A...

  • Page 60: Resistance

    CHAPTER 6: Cable Test Descriptions Press the down arrow to view Delay Skew test summary. This screen shows the additional delay time for each pair, compared to the shortest pair. DELAY SKEW 16ns Difference in Propagation Delay SAVE between Pair 1,2 and Pair 7,8 (494-486=8) 6.12 Resistance...

  • Page 61: Viewing Resistance Results

    SCAN-LAN Vt EXTENDED FUNCTIONS Attenuation Noise Impedance Resistance Cable Toner 4. Press ENTER to select the test. The test begins immediately. Press ESC to abort the test. (Press the arrow keys to change the cable test standard). 6.12.2 V IEWING ESISTANCE ESULTS The resistance for each wire in a wire pair is displayed.

  • Page 62: Power Sum Next

    CHAPTER 6: Cable Test Descriptions 6.13 Power Sum NEXT NEXT (Near End Crosstalk) is a measure of noise coupled from one pair to another pair in a four-pair cable. Power Sum NEXT is a sum of the pair-to-pair NEXT coupled from all adjacent pairs.

  • Page 63: Viewing Power Sum Next Results

    SCAN-LAN Vt 6.13.1 V NEXT R IEWING OWER ESULTS At the conclusion of Autotest, press VIEW (F3) to view the test results and press the arrow keys to display the Power Sum NEXT results. The Power Sum NEXT of each pair combination is compared to the selected cable test standard and pass or fail is indicated.

  • Page 64: Viewing A Graph Of Power Sum Next Results

    CHAPTER 6: Cable Test Descriptions 6.13.2 V NEXT R IEWING A RAPH OF OWER ESULTS To view a graph of the Power Sum NEXT test results: 1. From the detail or Summary Results screen, press GRAPH (F2). 32.1 Cursor 43.0dB 67.3MHz Test Limit PAIR...
  • Page 65 SCAN-LAN Vt Cable grading is only available for Category 5, Category 5 Plus, Class D, and Class D Plus standards. NEXT measurements from 1 to 100 MHz are compared against seven grades, as shown in the figure below. The SCAN-LAN reports the worst grade for each pair.
  • Page 66 CHAPTER 6: Cable Test Descriptions IEWING ABLE RADING ESULTS The screen below appears at the conclusion of an Autotest. The overall grade of the cable will be displayed below the pass/fail indication (in this case, the cable is a grade 4 cable). The “overall grade” is the worst-case grade for all pairs.

  • Page 67: Printing, Uploading, And Viewing Test Results

    SCAN-LAN Vt 7. Printing, Uploading, and Viewing Test Results The Print function allows you to send test results to a serial printer, upload the test results to a PC, or view stored test reports before printing or uploading. The Print function allows you to: Print some or all of the saved reports, print the last Traffic Report, delete saved reports, and view saved reports.

  • Page 68: Printing/Uploading Test Results

    CHAPTER 7: Printing, Uploading, and Viewing Test Results 7.2 Printing/Uploading Test Results 7.2.1 P RINTING PLOADING A INGLE EPORT 1. Set dial to PRINT to display the Print menu. 2. Press the arrow keys to highlight the test report you wish to print or upload.

  • Page 69: Printing/Uploading All Reports

    SCAN-LAN Vt PRINT <ALL REPORTS> Traffic Report 001 TEST-A √ 002 ABC √ 004 A97 SELECT DELETE VIEW PRINT 4. Repeat steps 2 and 3 to select all reports to be printed/uploaded. 5. Press PRINT (F4) or ENTER. 6. Follow the procedure in Section 7.2.5 NOTE Reports can also be de-selected by highlighting a selected report and...

  • Page 70: Uploading Detailed Next/Attenuation Results

    CHAPTER 7: Printing, Uploading, and Viewing Test Results 4. Follow the procedure in Section 7.2.5 NOTE Any selected test reports can be deselected by highlighting the report number and pressing DESELECT (F1), prior to PRINT. 7.2.4 U NEXT/A PLOADING ETAILED TTENUATION ESULTS Detailed NEXT or Attenuation test results can only be output to a PC...

  • Page 71: Deleting Test Reports

    SCAN-LAN Vt The serial-data format is fixed at 8-bit, no parity, 1 stop bit (8N1). 1. Press BAUD (F1) to increment from 1200 to 38,400 baud. 2. Press FLOW (F2) to select flow control: a. XON/XOFF (software) b. HARDWARE (CTS/DTR) c.

  • Page 72: Viewing Saved Test Reports

    CHAPTER 7: Printing, Uploading, and Viewing Test Results NOTE To select all reports for deletion, press SELECT (F1) when <ALL REPORTS> is highlighted. This selects all of the report numbers. 4. Press DELETE (F2). A screen displays the selected report numbers and asks you to confirm that you wish to delete the tests.
  • Page 73 SCAN-LAN Vt SCAN-LAN Vt NETWORK TRAFFIC REPORT Start Time: 15:29:14 Date: 08/08/1995 Operator: Cable Test Standard: 10Base-T Module Type: Modular Plug Location: ___________________ Serial Number: 0000000 ***Average Utilization ---Peak Utilization C = % Collisions Percent Network Utilization Time Packet +-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ Rate HH:MM:SS: 00:00:10 ***-------...
  • Page 74 CHAPTER 7: Printing, Uploading, and Viewing Test Results SCAN-LAN Vt NETWORK TRAFFIC REPORT Start Time: 15:29:14 Date: 08/08/1995 Operator: Cable Test Standard: 10Base-T Module Type: Modular Plug Location: ___________________ Serial Number: 0000000 ***Average Utilization ---Peak Utilization C = % Collisions Percent Network Utilization Time Packet...

  • Page 75: Testing Twisted-Pair Cable

    SCAN-LAN Vt 8. Testing Twisted-Pair Cable This chapter contains information about the fundamentals of testing twisted-pair cables. This chapter also discusses common wiring problems and reasons that cables fail. Tables of troubleshooting tips are provided throughout the chapter; use them for quick reference when troubleshooting a cable segment.

  • Page 76: Twisted-Pair Test Descriptions

    CHAPTER 8: Testing Twisted-Pair Cable The TSB-67 UTP Link Performance specification is becoming the benchmark for installed UTP links and is the specification that the SCAN- LAN Vt design is primarily based on. 8.2 Twisted-Pair Test Descriptions The following test descriptions apply to testing four pair Unshielded Twisted Pair (UTP).
  • Page 77 SCAN-LAN Vt Wire Map checks for shorts, opens, crossed pairs, reversed pairs, and other wiring errors. Wire Map also checks the continuity of a shield if one exists. When installing a new link or modifying an old link, it is very common to accidentally create wiring errors.
  • Page 78 CHAPTER 8: Testing Twisted-Pair Cable Figure 8-4 illustrates an example of a split pair where pins 1 and 2 are split with 3 and 6. Refer to the for an explanation of NEXT. Section 8.2.2 1,2 splits 3,6 Figure 8-4. Split Pair. NOTE A split pair cannot be detected with a simple DC continuity check.
  • Page 79 SCAN-LAN Vt Test Results Possible Solutions OPEN on one or Perform a length test to locate fault. Go to the fault and correct more of the pairs the wiring error. If you cannot locate the fault by the length test, check all ter- minations at punchdown blocks, patch panels, and wall plates.
  • Page 80 CHAPTER 8: Testing Twisted-Pair Cable Test Results Possible Solutions Split pair The SCAN-LAN Vt is designed to test for EIA/TIA 568 (continued) pairing (1, 2; 3, 6; 4, 5; 7, 8). USOC pairing is 1, 8; 2, 7; 3, 6; 4, 5. If testing a USOC cable, you will get a split pair between pins 1, 2 and 7, 8.

  • Page 81: Near-End Crosstalk (Next)

    SCAN-LAN Vt 8.2.2 N (NEXT) ROSSTALK When a signal is transmitted onto one of the pairs, an electromagnetic field is created around the wires that couples the transmitted signal into adjacent pairs. This coupled signal is referred to as Crosstalk. Crosstalk is similar to the problem that occurs in a telephone when you hear another conversation on your line.
  • Page 82 CHAPTER 8: Testing Twisted-Pair Cable Signal generator Crosstalk Signal measurement Figure 8-7. NEXT Measurement. The twisting of pairs of wires is essential to minimizing crosstalk effects from pair to pair. The amount of twisting is a key difference between high- performance Category 5 cable and lesser-rated cable, such as Category 3.
  • Page 83 SCAN-LAN Vt NEXT (dB) Freq. Figure 8-8. Typical Relationship of NEXT and Frequency. NEXT is measured in decibels (dB). A high dB value, which is typically referred to as low NEXT, is good (for example, 48 dB). This means there is a large difference between the transmitted signal and the resulting NEXT.
  • Page 84 CHAPTER 8: Testing Twisted-Pair Cable Common Causes of Solution Excessive NEXT Bad or low-grade Patch cables may not be twisted pair. A common mistake is patch cables to use silver-satin untwisted cable for data applications. Patch cable could be wired incorrectly. Check twisted pairs per the EIA/TIA 568 pairing.
  • Page 85 SCAN-LAN Vt Test Results Possible Solutions NEXT test fails Check termination hardware to make sure all hardware for one or more is at least the minimum grade expected. For example, pairs (continued) if testing for Category 3, you could use Category 3, 4, or 5 components.

  • Page 86: Attenuation

    CHAPTER 8: Testing Twisted-Pair Cable 8.2.3 A TTENUATION The Attenuation test measures the reduction in the strength or amplitude of a signal as it travels over the length of a twisted-pair cable. The amount of this loss is expressed in decibels (dB) (refer to Figure 8-9). (Sending unit) (Receiving unit) Figure 8-9.
  • Page 87 SCAN-LAN Vt Common Causes of Solutions Attenuation Impedance A splice in the segment, or damage to a segment, can Anomalies cause excess attenuation. Perform a length test to check for anomalies in the segment. If anomaly is detected, go to that point and examine the cable and connections for kinks, cuts, splices, incorrect cable, sharp bends, etc.

  • Page 88: Length

    CHAPTER 8: Testing Twisted-Pair Cable 8.2.4 L ENGTH The SCAN-LAN Vt uses a method called Time Domain Reflectometry (TDR) to measure cable length. With TDR, a signal is transmitted at one end of a cable and, at the same time, a timer is started. The electrical signal travels down the cable until it reaches a change in impedance (for example, an open, a short, a fault in the cable, or a cable mismatch) and part or all of the signal is reflected back.
  • Page 89 SCAN-LAN Vt When the reflected signal reaches the tester where the signal was generated, the timer stops. By knowing the speed of the signal traveling down the cable, you can determine the length of the cable. How do you know how fast the signal travels down the cable? All cables have an inherent characteristic called Nominal Velocity of Propagation (NVP).
  • Page 90 CHAPTER 8: Testing Twisted-Pair Cable NOTE It is normal for some variation in the measured length of wire pairs within the same cable. This is due to the difference in construction of the individual pairs. Length variation from pair to pair will be greater for longer cable lengths.
  • Page 91 SCAN-LAN Vt Test Results Possible Solutions Anomaly Check distance to anomaly. Go to distance indicated and check for obvious problem (for example, splice in cable, couplers, kink or bend in cable, bad connection). Re-terminate the segment to eliminate the problem. If the problem continues, make sure other parameters, such as attenuation, are within limits.
  • Page 92 CHAPTER 8: Testing Twisted-Pair Cable Test Results Possible Solutions The length test If the remote unit is connected during the length test, the reveals OPEN remote creates an OPEN in order to measure the length. If the cable was terminated during the test, the SCAN-LAN Vt could not measure length.

  • Page 93: Noise

    SCAN-LAN Vt 8.2.5 N OISE Noise is defined as unwanted signals on the segment. Because of the construction of UTP cable, it acts as an antenna to electromagnetic and radio-frequency signals (refer to Figure 8-12). Examples of noise producers are fluorescent lights, electric motors, power lines, signals caused by voice lines sharing the same pathway as a data line, elevators, and industrial-type equipment.

  • Page 94: Impedance

    CHAPTER 8: Testing Twisted-Pair Cable The table below discusses some of the common sources of noise and their solutions. Common Causes of Noise Solution Electric motors Re-route the cable or follow your installation specification. If in an extremely noisy environment, it may be necessary to choose an alternate medium instead of UTP (for example, coax, fiber, etc.).

  • Page 95: Resistance

    SCAN-LAN Vt Do not mix cables with different characteristic impedances. Locations of any significant impedance changes can be found by performing the Length test on a segment. Refer to the previous section on Length for more information on finding characteristic impedance changes or anomalies. Test Results Possible Solutions Impedance is out of...

  • Page 96: Testing Tips

    CHAPTER 8: Testing Twisted-Pair Cable 8.3 Testing Tips 8.3.1 S (PM) ELECTING ERFORMANCE ODULE ABLE PECIFICATION 1. Select and install the appropriate Performance Module (PM) for the type of cable under test. 2. Select the correct cable test standard you wish to test to. If you select one of the EIA/TIA Category 3, 4, or 5 Basic Link test standards, the accuracy (Level I or Level II) will be determined by the Performance Module you use.

  • Page 97: Selecting The Proper Test

    SCAN-LAN Vt 8.3.3 S ELECTING THE ROPER Autotest should be used for all certification testing. Autotest verifies that all twisted-pair cable parameters meet the requirements of the cable specification selected. Autotest is also the only test other than Ethernet Traffic that can be saved for later printing. The purpose of the Quick Check is to make sure there are no gross errors before running the longer Autotest.

  • Page 98: Power Sum Next

    CHAPTER 8: Testing Twisted-Pair Cable 8.4 Power Sum NEXT Power Sum NEXT is a critical test for certifying the performance of installed twisted-pair links. It is the sum of the pair-to-pair NEXT coupled from all adjacent pairs in a cable. Power Sum NEXT is an important measurement for emerging high-speed local area networks such as 622-Mbps ATM and Gigabit Ethernet.
  • Page 99 SCAN-LAN Vt Limit Line Power Sum NEXT Pair-to-Pair NEXT Figure 8-14. Power Sum NEXT Measurement. The characteristics of Power Sum NEXT are very similar to those of NEXT. They both vary with frequency, are measured in decibels (a larger value is better), and are highly dependent on maintaining the wire twist up to the connector when terminating the cable.

  • Page 100: Delay/Delay Skew

    CHAPTER 8: Testing Twisted-Pair Cable 8.5 Delay/Delay Skew Pair 1 Pair 2 Pair 3 Pair 4 Delay Delay Skew Delay is a measure of the time electrical signals take to propagate from one end of the cable to the other end. The difference in propagation delays from one cable pair to another is called Delay Skew.
  • Page 101 SCAN-LAN Vt Test Results Possible Solutions Too much Delay NVP may be incorrect. Calibrate NVP and re-run the test. or Delay Skew Use a higher-grade cable; higher-grade cables typically have lower propagation delays. If your cable is identified as 2+2 or 3+1 cable, it may have excessive Delay Skew.

  • Page 102: Setup

    CHAPTER 9: Setup 9. Setup 9.1 Setup Functions The following table provides information about the functions available under the SETUP dial position. The table details the softkey operations, the selections available for each setup parameter, and factory-set default values. Table 9-1. Setup Functions Function Softkey Operations Available Selections...

  • Page 103: Changing Setup Parameters

    SCAN-LAN Vt NOTE Display contrast can be adjusted as follows: Hold the backlight button down while pressing the arrow keys, until the contrast is set for comfortable viewing. 9.2 Changing Setup Parameters NOTE Changes to the setup parameters are automatically stored in non-volatile memory.

  • Page 104: Fault Threshold

    CHAPTER 9: Setup 9.2.2 F AULT HRESHOLD Fault Threshold is the minimum reflection level detected as an anomaly in the Length test. Any reflection less than this threshold will be ignored by the SCAN-LAN Vt. The default Fault Threshold value is 7%, which corresponds to the worst- case allowable impedance discontinuity specified in IEEE 802.3 for coaxial cable.

  • Page 105: Noise Threshold

    SCAN-LAN Vt 9.2.3 N OISE HRESHOLD Noise Threshold is the minimum detection level for noise impulse spikes measured in the Noise test. The default Noise Threshold value is 260 mV, which corresponds to the impulse-noise specification for 10BASE-T. • Switch dial to SETUP. •...

  • Page 106: Powerdown Time

    CHAPTER 9: Setup 9.2.4 P OWER Power Down sets the time interval for the SCAN-LAN Vt’s automatic power-down. The SCAN-LAN Vt will power down after the time interval you select if there has either been no key press or no communication with the other end when set to remote mode.

  • Page 107: Backlight Time

    SCAN-LAN Vt 9.2.5 B ACKLIGHT The Backlight parameter sets the “on” time for the display backlight. The backlight should be used sparingly, as it reduces the number of operation hours on a set of batteries or a battery charge. • Set dial to SETUP. •...

  • Page 108: Power Frequency

    CHAPTER 9: Setup 9.2.6 P OWER REQUENCY The Power Frequency parameter is used to set the SCAN-LAN Vt to match the frequency of the local AC/Mains power source. Proper setting of Power Frequency will avoid display flicker caused by the interaction of the LCD display with room light sources.

  • Page 109: Baud Rate

    SCAN-LAN Vt 9.2.7 B The Baud Rate matches the SCAN-LAN Vt serial output baud rate with that of the printer or PC. The default setting is 9600 baud, which is the most common serial-printer input baud rate. • Set dial to SETUP. •...

  • Page 110: Flow Control

    CHAPTER 9: Setup 9.2.8 F ONTROL Flow Control determines what method is used to control data flow between the SCAN-LAN Vt and the printer or PC. The default setting is the HARDWARE flow control setting. Other available settings are: XON/XOFF, and NONE.

  • Page 111: Date

    SCAN-LAN Vt 9.2.9 D The SCAN-LAN Vt records the date that a test report is saved and includes this date on output test reports. There are three available date formats: mm/dd/yy (default), dd/mm/yy, or yy/mm/dd. • Set dial to SETUP. •...

  • Page 112: Time

    CHAPTER 9: Setup 9.2.10 T The SCAN-LAN Vt maintains a 24-hour time clock. Use the 0 SEC (F4) softkey to zero the seconds. • Set dial to SETUP. • Highlight Time using the arrow keys. • Press HOUR (F2) to change the hour. •...

  • Page 113: Audible Tones

    SCAN-LAN Vt 9.2.11 A UDIBLE ONES The Audible Tones parameter enables and disables audible tones that are created at the end of tests, and that are generated during Traffic and Noise tests. A different audible tone is created for Pass and Fail test results. •...

  • Page 114: Traffic/Noise Tones

    CHAPTER 9: Setup 9.2.12 T RAFFIC OISE ONES The Traffic/Noise Tones parameter enables and disables audible tones that are generated during Traffic and Noise tests as activity indicators. Traffic/Noise tones are automatically disabled when the Audible Tones parameter is disabled. •...

  • Page 115: Company Name

    SCAN-LAN Vt 9.2.13 C OMPANY Test reports can be customized to include a company name up to 20 characters long. • Set dial to SETUP. • Highlight “Co.” using the arrow keys. • Press MODIFY (F4) or ENTER to modify the name. •...

  • Page 116: Circuit Names

    CHAPTER 9: Setup 9.2.14 C IRCUIT AMES The Circuit Names setting determines the default name used for the circuit identification when saving Auotest results. • Set dial to SETUP. • Highlight Circuit Names using the arrow keys. • Press NONE (F1), BLANK (F2), NEXT (F3), or SAME (F4). SETUP Audible Tones Circuit Names...

  • Page 117: Auto Toner

    SCAN-LAN Vt NOTE The string length is not changed on overflow, but the character to the left is “incremented.” Letters increment to letters (...XYZABC...) and numbers increment to numbers (0123456789012...). Example sequences: ID-ABY ID-AB8 ID-ABZ ID-AB9 ID-ACA ID-AC0 9.2.15 A ONER Setting Auto Toner ON activates the Cable Toner feature whenever the unit is set to Quick Check or Autotest and a remote is not attached.

  • Page 118: Reset To Defaults

    CHAPTER 9: Setup 9.2.16 R ESET TO EFAULTS The Reset to Defaults parameter allows you to return the SCAN-LAN Vt’s internal settings to their factory-default settings. • Set dial to SETUP. • Highlight Reset to Defaults using the arrow keys. •...

  • Page 119: Circuit Names

    SCAN-LAN Vt 9.2.17 C IRCUIT AMES The Circuit Names setting determines the default name used for the circuit identification when saving Autotest results. SETUP Audible Tones Circuit Names NEXT Traf/Noise Tones Auto Toner Reset To Defaults HOME BLANK NEXT SAME •...
  • Page 120 CHAPTER 9: Setup NOTE The string length is not changed on overflow but the character to the left is “incremented.” Letters increment to letters (...XYZABC...) and numbers increment to numbers (0123456789012...). Example sequences: ID-ABY ID-ABZ ID-ACA ID-AB8 ID-AB9 ID-AC0...

  • Page 121: Calibration

    SCAN-LAN Vt 10. Calibration The SCAN-LAN Vt performs four types of calibration: NVP calibration, remote-unit calibration, performance-module calibration, impedance calibration, resistance calibration, and main-unit calibration. 10.1 NVP Calibration A default Nominal Velocity of Propagation (NVP) value is preselected in the SCAN-LAN Vt depending on the cable test standard selected.

  • Page 122: Using Manufacturer's Cable Specifications

    CHAPTER 10: Calibration 6. Press SAVE (F4) or ENTER to save the new value. 7. To repeat, press Start (F1). 8. Press ESC to exit the NVP calibration mode. 10.1.2 U ’ SING ANUFACTURER ABLE PECIFICATIONS If you do not have a known length of cable available, but can identify the cable manufacturer and part number, you may be able to determine the rated cable NVP and load that NVP value into the SCAN-LAN Vt.

  • Page 123: Why Do I Need To Set Cable Nvp

    SCAN-LAN Vt 3. Press INC (F3) or DEC (F2) to adjust the NVP value. 4. Press ENTER to save the new NVP value. A message indicates that the new value has been entered. 5. Press ESC to exit the NVP calibration mode. 10.1.3 W NVP? EED TO...
  • Page 124 CHAPTER 10: Calibration for remote operation. However, if Remote Calibration is performed, it’s important to verify that the calibration was completed properly. To calibrate the remote unit: 1. Connect the main unit to the CAT 3 calibration coupler, using the Modular Plug Performance Module.

  • Page 125: Performance-Module Calibration

    SCAN-LAN Vt or all pairs, perform the Remote Calibration again. If the problem continues, contact your supplier. 10.3 Performance-Module Calibration Each Performance Module used with the SCAN-LAN Vt needs to be calibrated in order to deliver maximum measurement accuracy. SCAN-LAN Vt automatically recognizes which type of Performance Module is installed, and can store a set of calibration parameters for each Performance Module in non-volatile memory.
  • Page 126 CHAPTER 10: Calibration a Category 5 Patch Cord for connecting a Modular Jack Performance Module to the Calibration Standard.) 5. Press START (F4) or ENTER. The message “CALIBRATING...” will be displayed on the screen. The bar graph across the bottom of the display will show the progress of the calibration.

  • Page 127: Impedance Calibration

    SCAN-LAN Vt 10.4 Impedance Calibration Impedance calibration should be performed periodically in order to maintain maximum accuracy. Impedance calibration is most sensitive to temperature changes. Allow the main unit to stabilize to the operating environment before performing the calibration procedure. Calibration should be performed whenever a different Performance Module is installed.

  • Page 128: Resistance Calibration

    CHAPTER 10: Calibration 10.5 Resistance Calibration Resistance calibration should be performed on a periodic basis in order to maintain maximum accuracy. Resistance calibration is most sensitive to temperature changes. Allow the main unit to stabilize to the operating environment before performing the calibration procedue. Calibration should be performed whenever a different Performance Module is installed.

  • Page 129: Ethernet Traffic Analysis

    SCAN-LAN Vt 11. Ethernet Traffic Analysis Traffic provides a report of Ethernet network utilization and activity. The SCAN-LAN Vt monitors live traffic on 10BASE-T Ethernet networks and continuously displays the percentage of network utilization, peak traffic, and collisions on the screen along with a bar-graph display of network activity.

  • Page 130: Viewing Traffic Results

    CHAPTER 11: Ethernet Traffic Analysis CAUTION Auto power-down is disabled during the Traffic test. Use the AC/Mains adapter to power the SCAN-LAN Vt for extended Traffic monitoring. 11.2 Viewing Traffic Results The screen displays a continuous reading of traffic conditions on the network.
  • Page 131 SCAN-LAN Vt Traffic test can detect the following three errors: ERROR DESCRIPTION No Link Pulse Indicates that there were no Link pulses received from the 10BASE-T hub, possibly as a result of a faulty hub or cable link connected to the hub. Wrong polarity Indicates possible miswire of cable link or hub port caused by tip/ring reversal on a wire pair.
  • Page 132 CHAPTER 11: Ethernet Traffic Analysis Figure 11-3. Traffic Test Results Screen (Jabber Detected). NOTE The “Error Since” message indicates the time when the present traffic error began. The “Last Error” message indicates the time since the last error occurred. There is no current error present.

  • Page 133: Self-Test

    SCAN-LAN Vt 12. Self-Test If the SCAN-LAN Vt fails to operate as expected, or exhibits inaccurate readings, perform a self-test. To run a self-test: 1. Set the dial to EXTENDED FUNCTIONS. 2. Press the arrow keys to highlight SELF-TEST. 3. Press ENTER. The test begins immediately and the screen displays the test results.

  • Page 134: Appendix A. Test Standards

    APPENDIX A: Test Standards Appendix A. Test Standards The SCAN-LAN Vt tests cabling to the performance required by the cable test standard chosen. The test limits for each specification standard are listed in the tables in this appendix. SCAN-LAN Vt cable test standards may be modified to add/remove cable tests (for example, cable resistance) and modify which pairs are tested.

  • Page 135: Basic Link Testing

    SCAN-LAN Vt Wall Outlet Transition Connector User's User's Equipment Equipment Cord Cord Horizontal Wiring SCAN-LAN Modular Cross Connect Patch Panel Jack Performance Module SCAN-LAN Modular Jack Performance Module TwoWay Main TwoWay Remote Remote Main A.3 Basic Link Testing You use the Basic Link configuration when a new installation is to be certified for conformance to the cabling-system performance requirements of TSB-67.

  • Page 136: Eia/Tia Tsb-67-Test Limits

    APPENDIX A: Test Standards A.4 EIA/TIA TSB-67—Test Limits When testing to Category 3, Category 4, or Category 5 UTP limits, the cable category as well as the Cable Test Configuration is chosen from the Cable Test Standards menu. To test the Channel, including user patch and equipment cords, use the Modular Jack Performance Module and test to Level-I accuracy.

  • Page 137: Iso/Iec-Test Limits

    SCAN-LAN Vt Table A-2. NEXT Frequency Category 3 (dB) Category 4 (dB) Category 5 (dB) Channel Link Channel Link Channel Link 39.1 40.1 53.3 54.7 >60 >60 29.3 30.7 43.3 45.1 50.6 51.8 24.3 25.9 38.2 40.2 45.6 47.1 22.7 24.3 36.6 38.6...
  • Page 138 APPENDIX A: Test Standards NOTE ScTP Class D and ISO 11801 Class D are equivalent, with the exception that ScTP requires shield continuity. Table A-4. ISO/IEC 11801 Pass/Fail Limits Frequency Max. Attenuation Values (dB) Min. NEXT Loss (dB) (MHz) Class C Class D Class C Class D...

  • Page 139: Enhanced Cable Standards-Test Limits

    SCAN-LAN Vt Table A-6. ISO 11801 Class C, Class D Pass/Fail Limits Length 100 meters 100±25 Ω Characteristic Impedance Split Pair 20 dB <20.5 Ω Resistance A.6 Enhanced Cable Standards—Test Limits SCAN-LAN Vt includes several enhanced Cable Test Standards. All enhanced cable standards are designated as “Plus”...
  • Page 140 APPENDIX A: Test Standards Table A-7. 10BASE-T Pass/Fail Limits ≤100 meters Length <9.9 Ω Resistance 100±25 Ω Characteristic Impedance NEXT >31 dB @ 5 MHz >27 dB @ 8 MHz >26 dB @ 10 MHz (NEXT >26-15log(f/10) where: f = signal frequency in MHz) Attenuation <11.5 dB Split Pair...
  • Page 141 SCAN-LAN Vt Table A-9. 16-Mbps Token Ring UTP Pass/Fail Limits ≤100 meters Length <9.9 Ω Resistance 100±25 Ω Characteristic Impedance NEXT >41 dB @ 5 MHz >38 dB @ 8 MHz >36 dB @ 10 MHz >33 dB @ 16 MHz >32 dB @ 20 MHz Attenuation <5 dB @ 5 MHz...
  • Page 142 APPENDIX A: Test Standards Table A-12. 100BASE T4 Pass/Fail Limits ≤100 meters Length Characteristic Impedance 100±25Ω NEXT Between 1 and 16 MHz, NEXT>Category 3 Channel Limits Attenuation Between 1 and 16 MHz, Attenuation <Category 3 Channel Limits Split Pair 20 dB Resistance <9.9Ω...
  • Page 143 SCAN-LAN Vt Table A-15. ISO 11801 Class D Pass/Fail Limits ≤100 meters Length Characteristic Impedance 100±25Ω NEXT Between 1 and 100 MHz NEXT>ISO 11801 Class D Limits Attenuation Between 1 and 100 MHz, Attenuation<ISO 11801 Class D Limits Split Pair 20 dB Resistance <9.9Ω...

  • Page 144: Defining Custom Standards

    APPENDIX A: Test Standards Table A-18. FTP 120Ω Pass/Fail Limits ≤100 meters Length Characteristic Impedance 120±25Ω NEXT Between 1 and 100 MHz, NEXT > ISO 11801 Class D Limits Attenuation Between 1 and 100 MHz, Attenuation < ISO 11801 Class D Limits Split Pair 20 dB <20.5 Ω...
  • Page 145 SCAN-LAN Vt To create a custom standard: 1. Set the dial to Autotest, Quick , Wire Map, Length, or Traffic. √ 2. Press either arrow key to display the cable standard library. Change Cable Standard CAT5 Channel √ CAT5 Basic Link CAT4 Channel CAT4 Basic Link CAT3 Channel...
  • Page 146 APPENDIX A: Test Standards Select Pairs: √ PAIR 1 (1-2) √ PAIR 2 (3-6) √ PAIR 3 (4-5) √ PAIR 4 (7-8) SHIELD CANCEL TESTS DESELECT SAVE 6. Press SELECT/DESELECT (F3) to choose wire pairs and shield. 7. Press SAVE (F4) to save the custom standard. To cancel, press CANCEL (F1).

  • Page 147: Appendix B. Common Cable Nvp Values

    SCAN-LAN Vt Appendix B. Common Cable NVP Values The SCAN-LAN Vt uses the following default NVP values: Cable Test Standards Default NVP Category 5 Basic Link Category 5 Channel Category 4 Basic Link Category 4 Channel Category 3 Basic Link Category 3 Channel Token Ring STP Token Ring 4 UTP...
  • Page 148 APPENDIX B: Common Cable NVP Values Manufacturer Part No. Category Impedance (Ω) NVP (%) Alcatel 530102 Alcatel 230146 Alpha 9304C Alpha 9304F AT&T 1010A AT&T 1024A AT&T 2010A Belden 1154A Belden 1155A Belden 1229A Belden 1245A Belden 1250A Berk-Tek LAN-Grade PL PVC Berk-Tek LAN-Grade PL FEP Berk-Tek...
  • Page 149 SCAN-LAN Vt Manufacturer Part No. Category Impedance (Ω) NVP (%) Berk-Tek HYPER-Grade PL Berk-Tek HYPER-Grade NP Berk-Tek LANmark PL Berk-Tek LANmark NP...

  • Page 150: Appendix C. Optional Accessories

    APPENDIX C: Optional Accessories Appendix C. Optional Accessories The following accessories may be ordered separately from your supplier. ACCESSORY PART NO. Modular Jack Performance Module TS692 Coax Performance Module TS693 Battery Eliminator, Rechargeable NiMH TS694 Carrying case, softside TS695...

  • Page 151: Appendix D. Cable Replacement Procedure

    SCAN-LAN Vt Appendix D. Cable Replacement Procedure D.1 General The Modular Plug Performance Module shipped with your SCAN-LAN Vt features a user-replaceable test cord. This Performance Module is a critical part of a SCAN-LAN Vt. The SCAN-LAN Vt uses frequencies up to 100 MHz, where 1 inch of wire is a significant part of a wavelength.

  • Page 152: Disassembly

    APPENDIX D: Cable Replacement Procedure PTIONAL QUIPMENT • Soldering tools • Needle-nose pliers. THREADED SPACER (2) CASE TIE-WRAP PCB MOUNT SCREW (2) GROMMET INSTALLATION JACK SCREW (2) Figure D-1. Performance Module Disassembly. D.3 Disassembly 1. Remove the Performance Module from the main body. CAUTION Removing the Performance Module exposes static-sensitive electronics inside the main body.

  • Page 153: New Cable Preparation

    SCAN-LAN Vt 4. Make notation of old wire attachments, including color versus position, number and direction of twists, and approximate lay in the case. 5. Remove individual wires by unscrewing their terminals with the screwdriver. For easy re-assembly, fully open the terminal barrels, using six full turns.
  • Page 154 APPENDIX D: Cable Replacement Procedure 1. Slide the plastic case and then the grommet onto the new cable. 2. Slit the jacket lengthwise 1 ⁄ inches (35 mm). With ScTP, cut the foil shield back to the jacket, leaving the drain wire intact. Pull the jacket away and then cut it off close to the bundle.

  • Page 155: Reassembly

    SCAN-LAN Vt D.5 Reassembly GREEN BROWN WHITE-GREEN WHITE-BROWN WHITE-ORANGE WHITE-BLUE ORANGE BLUE DRAIN WIRE (ScTP ONLY) CABLE TIE WRAP GROMMET COLORS PER T568A Figure D-3. UTP Cable Assembly. 1. Insert into its terminal and tighten screw until snug (see each wire Figure D-3).
  • Page 156 APPENDIX D: Cable Replacement Procedure Install new tie wrap centered on grommet sleeve as shown in Figure D-3. When the tie wrap is finally tightened, its ratchet box should be approximately in the plane of the wire fan. 5. Tighten tie wrap as much as possible (until wrap material begins to stretch).

  • Page 157: Recalibration

    SCAN-LAN Vt D.6 Recalibration Follow the procedures in Calibrate Performance Module. Chapter 10 for Performance Module Calibration. NOTE In addition to calibrating, this step checks the NEXT to ensure that your new cable assembly is similar in quality to factory specifications. If your assembly fails this test, re-examine the twisted pairs as they enter the screw terminals.
  • Page 158 APPENDIX D: Cable Replacement Procedure Table D-1. Replacement Cable Connections Terminal Blocks Wire-Map Number (DRAIN) Type Wire Connections T568A Pair 3 Pair 2 Pair 1 Pair 4 Green White- White- Orange BLue White- White- BRown Green Orange BLue BRown T568B * Pair 2 Pair 3 Pair 1...

  • Page 159: Glossary

    SCAN-LAN Vt Glossary A voltage or current of alternating polarity. AC (Alternating Current)— A unit that allows multiple-device attachment at a central Access Unit— location. An identification code assigned uniquely to each device or Address— workstation connected to a network. A continuously varying signal that can take on any voltage or Analog—...
  • Page 160 GLOSSARY A cable-impedance-matching RF transformer. Balun— The difference between the highest and lowest frequency Bandwidth— available on a channel to effectively transmit signals. Connector that joins two sections of a coax cable. Barrel Connector— A frequency band that uses the complete bandwidth of a cable Baseband—...
  • Page 161 SCAN-LAN Vt Eight data bits. Byte— A medium that is used to interconnect two or more devices for Cable— communication. The ability to store an electrical charge between two surfaces, Capacitance— measured in farads. Copper Distributed Data Interface, a variation of the FDDI CDDI—...
  • Page 162 GLOSSARY The coupling of a signal between pairs of a multiple-pair cable. Crosstalk— Canadian Standards Association. CSA— Ethernet CSMA/CD (Carrier Sense Multiple Access/Collision Detection)— media access method in which stations transmit on a bus whenever the medium is available and re-transmit when collisions occur. A logarithmic unit of measure used to express the amplitude Decibel (dB)—...
  • Page 163 SCAN-LAN Vt Federal Communications Commission. FCC— A network standard (ANSI FDDI (Fiber Distributed Data Interface)— X3T9.5) that defines a 100-Mbps token-ring network using optical fiber for data transmission over distances of several kilometers. A transmission medium designed to transmit data in the form of Fiber—...
  • Page 164 GLOSSARY A frequency-dependent parameter defined by the ratio of the Impedance— AC Voltage to Current across a circuit element. Non-repetitive electrical spikes or pulses caused by Impulse Noise— external electromagnetic fields. The ability to store a magnetic field across a conductor Inductance—...
  • Page 165 SCAN-LAN Vt The method of determining how stations MAC (Medium Access Control)— access the medium at any time. A unique identification number assigned to each station MAC Address— connected to a network. Sometimes called Station Address. The connections between external Main Cross Connects—...
  • Page 166 GLOSSARY A program that is used to monitor, manage, and Network Manager— diagnose the problems of a network medium. Connecting point on a network. A station or device on a network. Node— Any random disturbance in a communications system that Noise—...
  • Page 167 SCAN-LAN Vt An access point for data I/O. Port— A sum of the pair-to-pair NEXT coupled from all Power Sum NEXT— adjacent pairs in a cable. A standard set of rules specifying the format, timing, and Protocol— sequencing for data transmission. A block of mechanical devices that is used to connect Punch-Down Block—...
  • Page 168 GLOSSARY The outside covering of a cable(s). Sheath— A conductive material that is used to enclose a data cable to Shield— decrease emissions and noise susceptibility. Cable constructed of up to four twisted-wire Shielded Twisted Pair (STP)— pairs, each pair individually surrounded by a metal foil, and all wire pairs surrounded by a metal shield plus an outer protective jacket.
  • Page 169 SCAN-LAN Vt A technique for measuring cable TDR (Time-Domain Reflectometry)— lengths by timing the duration between an incident pulse and the reflected pulse from an impedance discontinuity on a cable. A room used to interconnect horizontal cable Telecommunications Closet— links to communication distribution equipment. Also called wiring closet. A connection to the end of a cable which is intended to match Terminator—...
  • Page 170 GLOSSARY Underwriter’s Laboratories. ® — Cable constructed of four twisted UTP (Unshielded Twisted Pair cable) — wire pairs surrounded by an outer protective jacket. A lower quality or category of cable used to carry Voice Grade Cable— telephone communication. The potential difference between two points. Voltage—...

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