dtx workshops panduit mexico [modo de compatibilidad]

7/30/2019 DTX Workshops Panduit Mexico [Modo de Compatibilidad]

1/143

or s op on a ngor s op on a ng

DTX Series CableAnalyzerDTX Series CableAnalyzer

DTX Workshop Rev. 3a April 2005 Fluke Networks 1


2/143

Ing. Marco Antonio Damin Carbajal



3/143

Workshop Agenda

What is certification and why do it?-

Best Practices in Field Certification

rou es oo ng a ng n s Fiber testing with the DTX-1800 and the DTX-FTM

- rec ona ua wave eng es ng w e

Virtual Fault Locating with the DTX es resu s managemen w n are an

LinkWare Stats



4/143

Certification

cer y v. cer e , cer y ng, cer es. tr

1.a. To confirm formally as true, accurate, or genuine..

certified Grade A. See Synonyms at approve.[Source: American Heritage Dictionary]

Compare the performance of an installed cabling

The cabling system includes: cables in the wall,

outlet connectors, interconnects, patch panels andpatch cords

Performance depends on component quality and



5/143

Understand Why We Certify (1)

Certification Value For the Customer

Its All About Confidence

The components delivered meet the specified

performance requirements

The installation has been performed with Qualityworkmanship

Affirmation that the user receives a cabling system

that meets the Quality and performance he/sheexpec s an s pay ng or

Customer Satisfaction



6/143

Understand Why We Certify (2)

Certification Value For the Contractor

Its All About Re utation

Proof of Installation Quality

Component Quality + Workmanship Quality =

Quality Installation Evidence To Win Repeat and New Business

Assurance and documentation that the job was done

right ee e n case o u ure pro em



7/143

-

Bandwidth Networking Technologies

1. Test Parameters1. Test Parameters

2. Test procedures2. Test procedures



8/143

Test Parameters

Wire map

Length

Attenuation

NEXT

e urn oss

Propagation delay

Power Sum NEXT

Power Sum ACR

ELFEXT

Power Sum ELFEXT



9/143

An Installed Cabling Link

- -

HUB or

SWITCH

Equipm.

Telecom

OutletCP

Cross-Patch

Cord

PanelHORIZONTAL CABLE WORKSTATION

TELECOMMUNICATIONTELECOMMUNICATION WORK AREAWORK AREA


FLOOR DISTRIBUTORFLOOR DISTRIBUTOR

(optional)


10/143

The Channel Measurement

-

Equipm.

Telecom

OutletCP

Cross-Patch

Cord

PanelHORIZONTAL CABLE




(optional)


11/143

Link Definition: Permanent Link

made by the tester patch cables

Link End

Telecom

n n

u ePatchPanel

CP

TESTER

PATCH

PATCH

CORD


RoomRoom CP: Consolidation Point


12/143

Why the Permanent Link?

The true foundation cabling that is permanent

and part of the building infrastructure Network equipment, patch cables and equipment

cables are changed many times during the life of

e ca ng n ras ruc ure

Provide guarantee that the Channel (permanent

application requirements

Compliant Perm. Link

+ Compliant Patch Cord

Compliant Perm. Link



= Compliant Channel= Compliant Channel


13/143

Permanent Link Accuracy

,

the performance of the Permanent Link Adapter

-

accuracy of the PL measurement is only degraded a

very small amount from the baseline accuracy

The principle rules: The adapters should not contribute to the

measurement results of any test parameter

(degradation to be minimized) Mated NEXT of the test plug and jack at the end of

the link-under-test have a significant influence


accuracy model)


14/143

Return Loss A Major Test Challenge

RL disturbance is more significant when the

disturbance is closer to a transmitter/receiver (the

Permanent Link

Return Loss in the testers ada ter cords closestto the transmitter/receiver potentially adds a

significant measurement error that must be avoided


n yone so u on e u e e wor s ap er


15/143

DTX Permanent Link Solution

Adapters constructed with

proprietary cable design ap ers n er ace w e -

PM06 as well as with the legacy

and IDC personality modules

Measured Parameters Correction Factor

Insertion Loss Insertion Loss of adapter Stable

NEXT Centered cat 6 plugVery high-quality cable plus Real-Time

compensationFEXT


e urn oss ery g -qua y ca e en ance y

field calibration (Software version 1.1)


16/143

A Revolutionary Plug Design

Im lemented without cabletermination

Circuit board design offersper ormance n very narrowwindow

Favorite of installer: Snag-free clip



17/143

Variety of Vendors and Models



18/143

Its All About TimeIts All About Time



19/143

Familiar User Interface

connector for

Copper adapters

Rugged overmold

bonded to case

Bright color displaySoft key labels

. .

Test

Keypad and rotary

knob make learningUSB and Serial

Power On button

connectors



20/143

Testing Copper withTesting Copper with



21/143

Demonstration Setup (1)

Press the Green Button

to turn the DTX on.



22/143


1. Turn rotary knob to SETUP2. Select Twisted Pair

3. Select Cable T e

4. Select Cat 6 UTP



23/143


5. Select Test Limit6. Select TIA Cat 6 Perm. Link

If the desired test standard isnot listed press the More

u on o access a o ers o

test standards



24/143

To start the AUTOTEST,

press



25/143

NEXT Measurement Evaluation

Worst Value


.

This typically occurs in the higher frequency range


26/143

NEXT Measurement Evaluation

Worst Margin


. .

Worst Margin can occur at any frequency !


27/143

NEXT - Worst Case Margin

Margin: Difference between measured value and

pass/fail limit value Positive margin means it is better than minimum

Negative margin means it is less than minimum

Worst case: smallest margin

the point closest to the standards limit across all

frequencies Worst Case Margin can be used as a quality grade

for the link-under-test



28/143

NEXT Headroom

Worst case NEXT Margin

for all pair-to-pair NEXT

6 pair combinationsfrom Main Unit

6 pair combinationsfrom Remote Unit

Headroom indicates thequality of the link

=

Bigger value is better



29/143

Inspection of NEXT Test Results

Select NEXT on Summary

Press ENTER

ew e resu s rom e

Main and Smart Remote

Select Worst Case Margin

Press EXIT to return to the



30/143

Saving the Test Results with a DTX Tester

Another great feature that

1. Turn to SETUP Select Instrument Settin s

2. Select Cable ID Source

Select one of the four choices



31/143

Saving the Test Results: NONE

Type the name of the each

cable ID A blank cable ID field appears

Select the character you want

by using the arrow keys Example: create label 1F-3C20

Move to character 1, press

ENTER

ove to , press

Move to dash, press ENTER


When completed, Press SAVE


32/143

Saving the Test Results: Auto Increment

Type in the name of the first

cable ID Auto Increment mode

automatically increments the

as c arac er n e name

each time you save a test

The cable ID to be used is

shown You can edit the selected

name



33/143

Auto Sequence

Automatically fills in the IDs between the START

and STOP ID The rules:

A characters that are common between START and

STOP ID are NO changed

Cycle from START to STOP beginning with the right

mos e

Then cycle through the next field, each time



34/143

Example of Auto Sequence

START ID: 1F-A01

STOP ID: 3F-D24

1F-A01 1F-B01 2F-A01 2F-D01

-

1F-A03 1F-B24 2F-A24 2F-D24

: 1F-C01 2F-B01 3F-A01

: : : :

: 1F-C24 2F-B24 :1F-A22 1F-D01 2F-C01 :

1F-A23 : : :


1F-A24 1F-D24 2F-C24 3F-D24


35/143

Create the Auto Sequence List of ID

Select Auto Sequence

Select a Template Create the Start ID

Same method as entering a

cable ID Press SAVE to end and store

Create the Stop ID

Press SAVE Press SAVE to exit

Auto Sequence creation



36/143

Auto Sequence Save Test Results

After Autotest is

complete, press SAVE DTX shows available ID

names

Select ID to be used

Press SAVE to complete

opera on

Return to Test Summary



37/143


38/143

What happens when a link fails?



39/143

Troubleshooting with the DTX

The two primary Performance Failures in a high

performance cabling system are caused by: Near End Cross Talk (NEXT)

Return Loss (RL)



40/143

Advanced Time Saving Diagnostics

Fault info key (soft key) =

Intuitive, plain languageexp ana on o e e ec

Identifies location

Deeper level diagnostics still

available:

HDTDX shows crosstalk

magnitude along the link-

under-test



41/143

NEXT and NEXT Defects

Causes of NEXT failure include:

untwisting of wire-pairs at connection points poorly matched plug/jack combinations

poor quality patch cables

bad connectors bad cable

split pairs

excessive com ression caused b lastic cable ties excessive noise source adjacent to measured

cabling link



42/143

Troubleshooting RL with HDDTR

When the link fails,

Press the Fault Info key DTX Series utilizes Fluke

Networks patented High

Definition Time Domain

Reflectometer (HDTDR)

can e use o ur er

pinpoint or analyze the problem

necessary



43/143

Testing Fiber with



44/143

TIA TSB140

Approved February 2004

Defines two Tiers of testing fiber:

Tier 1 (mandatory):

1. Attenuation and length measurement2. Polarity verification

Tier 2 (optional):

. er es

2. Plus an OTDR trace of the cabling link



45/143

Testing Premise Fiber TSB140 - Tier 1

Testing horizontal fiber in accordance with TSB140Tier 1 requires you to test at one wavelength in one

.

Testing backbone or riser fiber optic cable requiresou test in one direction at both wavelen ths

If the adapters enforce polarity, verify polarity(bi-directional testing is not required)

Bi-directional testing is a good idea with ST-styleadapters when every fiber may be used in either

ensures that core diameters properly align in both


requires additional test time


46/143

DTX-FTM

The DTX-FTM are:

1. Fiber certification modules for the DTX Series

CableAnalyzers

2. Dual source/Bi-directional adapters

.

4. TIA TSB 140 Tier 1 Ready



47/143

DTX Series Fiber Test Modules

Three types of modules

All modules support two wavelengths for both fibers

All modules offer a built-in VFL

DTX-MFM LED li ht source: 850nm/1300nm wavelen ths

DTX-GFM

VCSEL/ Laser light source: 850nm/1310nm

For singlemode fiber

DTX-SFM


aser g source: nm nm


48/143

Set up to test Fiber(1)

Insert the DTX-MFM into the DTX

The fiber module is co-residentwith the copper tester

If you pre-configured for fiber

testing simply select ChangeMedia



49/143

Set up to test Fiber(2)

Select Fiber

Setup-Tab 1 Fiber Type

Test Limit

Smart Remote Bi-Directional



50/143

Fiber Demonstration Setup (1)

Ensure that

Remote End setup:Smart Remote

Bi-Directional:Yes

Select Fiber Type: Generic

Select: Multimode 62.5



51/143


Select Test Limit

TIA568B Backbone MM Press Exit

Press Right Arrow to move to

Setup-Tab 2

Update:

um er o ap ers:

Number of Splices: 0

Test Method: Method B



52/143


Get ready for testing

Turn the Rotary knob to AUTOTEST



53/143

Setting the Reference

Turn the rotary knob to

SPECIAL FUNCTIONS Select Set Reference

Connect the tester fiber

patch cables just like thediagram on the tester

screen

Press Test



54/143

Fiber Mandrels

e - are use w an

source when measuring optical power loss

in multimode fiber optic cabling The mandrels act as mode filters

remove hi h-order modes from the o tical

signal to achieve equilibrium modal

distribution (EMD) when testing with LED

Fiber mandrels improve instrument-to-

instrument loss measurement consistency

and repeatability

Mandrels are used to meet the launch


con ons spec e n - .


55/143

er an re s - o e s


These mandrels can be used with any LED sourced tester


56/143

Loss Measurement - Test Setup



57/143

er es ng xerc se

,



58/143

er es ng

When the test is completed, the results from the

test are dis la ed

Select the highlighted selection and press enter

This will show the individual test results of thetest just performed



59/143

DTX-FTMVisual Fault Locator

The DTX-MFM include a

Visual Fault Locator VFL Two modes of operation:

Continuous Wave and

Flashing Used to find breaks or to

identify fiber on patch panels



60/143

Stats



61/143

The New Standard for Test ResultsManagement



62/143

Manage test results

1. Create ANSI/EIA/TIA 606-Acompliant projects

2. Import data from Fluke Networks

testers into common database

3. Easily sort through test reports

4. Append files with test reports from

another



63/143

Flexible Reporting

Graphical

Summary

Text



64/143

Tester Administration

Upgrade software/databases for

various Fluke Networks cable

test equipment

Create custom setups for

Create custom Cable IDs



65/143

Test Results Management --Printed Reports

LinkWare Software supports

several alternatives to rovidetest results information to your

customer:

rap ca co or repor w measure

test points over full frequency range Text format with worst case

and worst value data

Summary report which provides a

list of the cabling links tested and

key information

Reports can be printed on paper

or sent to an electronic PDF file.



66/143

LinkWare Stats Software

Software option to LinkWare

Reveals trends, exceptions, &performance of large amounts

of certification data

Project Managers (installer ofthe infrastructure)

End Users (owner of the

installation)

Premise Wiring Manufacturers(warrantor of the system)



67/143

ummaryummary



68/143

DTX Series Cable Analyzers

certification tester

Provide fast test time (as low as 9seconds!)

Test up to 900 MHz

Meets Accuracy Level IV for baseline,

PLA and Channel

color screen

Familiar cockpit for FNet customers

Manage test results data with

LinkWare (& LinkWare Stats)


Long battery life (12 hours)


69/143

DTX Series Fiber Test Modules-

modules

Multimode module transmits 850 nm and

Gigabit Multimodule supports VCSEL

(850 nm) and FP laser (1310 nm)

Singlemode modules transmit 1310nm

and 1550 nm with a Fabry-Perot laser

All DTX Series Fiber Test Modules include

a built-in Visual Fault Locator

Integrated modules allow for switching

between copper and fiber test without re-

referencing


TIA TSB140 Tier 1 Ready


70/143

Linkware and Linkware Stats

with a single software application

supports Fluke Networks' entire line

Deliver professional graphic reports

Electronically save, maintain and

archive test results

Standards compliant with the abilityto configure and print TIA 606-A

documentation

New drag and drop feature makes it

easier to manage and organize

multiple projects

Simple user interface and time-

savin features for increased


productivity


71/143


ow a r e wor rom our sponsor


72/143

ow a r e wor rom our sponsor....

Fluke Networks

The RIGHT TOOL for the RIGHT JOB for the RIGHT.

We have the largest array of test, monitoring, andmanagement products in the industry.

Tools designed for specific job responsibilities and for

the people manning those jobs.



73/143

Fluke Networks Background

Corporation in 1992

B 2000 rowth and market differences from Flukewere apparent

Different customers

Different sales channels and sales processes

Different products and applications

In 2000, Fluke Networks was spun off as a separatecompany

u e e wor s an u e orpora on are separa eand distinct companies


(DHR)


74/143

History of Fluke Networks


er o u ons rom u e e wor s


75/143

DTX Workshop Rev. 3a April 2005 Fluke Networks 75Fiber Test Solutions


76/143

Other Solutions From Fluke Networks

e wor anagemen , on or ng, ocumen ng, rou es oo ng


IntelliTone LinkRunner MicroScanner WaveRunner NetTool OneTouch

HandHeld Test Tools for Ethernet Networks


77/143

Muchas Gracias!

Ing. Marco Antonio Damin Carbajal

Ingeniero de Soporte Pre-Venta

[email protected]

(55) 53 40 1478



78/143



79/143

Cabling Standards Around the World

IT Generic Cabling for

Customer Premises

ANSI/TIA/EIA 568-

Commercial Building

Telecommunications

EN50173:2002

Requirements Of

Generic Cabling



80/143

Types of Standards

Component specifications

Define performance and grades of cables,

connectors and hardware

Example: ANSI/TIA/EIA 568-B.2

Installed Link Specifications

Permanent Link and Channel

Example: ANSI/TIA/EIA 568-B.1

Network Technology Standards (Applications)

Define performance requirements for all elements of

a the network


Example: IEEE 802.3, ATM-PHY


81/143

ANSI/TIA/EIA Standards

568-B Commercial Building Telecommunications

Cabling Standard

569 Commercial Building Standards for

Telecommunications Pathways and Spaces

570 Residential and Light Commercial

Telecommunications Wiring Standard - e m n s ra on an ar or e

Telecommunications Infrastructure of

607 Commercial Building Grounding and Bonding

Re uirements for telecommunications



82/143

Benefits of Standards Compliance

Assurance that cabling system will support

standards-based applications

Future network applications will most likely be

developed based on infrastructure standards

Simplify administration

Reduce Total Cost of Ownership (TCO)

Accommodate future growth


Principle of ISO & TIA Performance


83/143

p

Measurements

Based on a Signal-to-Noise Ratio

Measure of signal strength at the end of the

transmission medium

Noise/Disturbance All unwanted or undesirable si nal noise inserted

between transmitter and receiver

Characterized by test parameters that measure

cross a , an re urn oss Each noise (test) parameter cannot exceed the specified

level



84/143

The Legacy Category 5 System

A two wire-pair system

The traditional or legacy transmission system

WorkstationWorkstationLANLAN

E ui mentE ui mentSignal

Signal

Receive Transmit



85/143

The Category 5 Test Parameters

Signal strength: measured by Attenuation

Noise: Near-End Cross Talk (NEXT)

WorkstationWorkstationLANLAN

E ui mentE ui mentSignal

SignalAttenuated Signal

Receive TransmitNEXT


Signal-to-noise ratio: Attenuation to Crosstalk Ratio (ACR)


86/143

Insertion Loss (Attenuation)

The amount of signal loss in the transmission

link (expressed in dB)

Measure of Signal in Signal-to-Noise Ratio

gnagna

SourceSource ReceiverReceiver

LossLoss


Att ti


87/143

Attenuation

Decibel is a logarithmic expression of a power ratio

ower a e en o e n over power aunc e athe input

a o ec e

1/2 -6 dB

1/5 -14 dB


-

Att ti


88/143

Attenuation

Function of (Increases with):

Frequency

Temperature

Cat 3 cable: 1.5% per degree Celsius

Cat 4 & 5 cable: 0.4% per degree Celsius

Link Length Increases directly proportional with link length

Metallic Conduit

pprox. ncrease Relative Humidity


Att ti F ti f F


89/143

Attenuation as a Function of Frequency

Attenuation (dB) Pair 1,2

25

PASS: 30-May-97 01:20:22pmTEST CABLE (300 ft)

20

10

15

5

00.1 10.1 20.1 30.1 40.1 50.1 60.1 70.1 80.1 90.1 100.1

MHzTIA Cat 5 Basic Link LimitMukilteo Cable Co.


Attenuation

M t R ti


90/143

Measurement Reporting

PASS

which this occurs

FAIL

occurs

Margin: Difference in dB between test limit value

and measured value


Positive number when test passes

Crosstalk


91/143

Crosstalk

Transmit

NEXT FEXT

Crosstalk measures the amount of signal interference or

coupling from one wire-pair to another wire-pair

NEXTmeasures crosstalk at the signal source the Near End

FEXTmeasures crosstalk at the receiver the Far End

FEXT was not measured for the Cat 5 cabling system since that


NEXT is measured in dB


92/143

NEXT is measured in dB

1

NEAR END FAR END1

2 2

Tx signal 100

3 3

Rx dist. 100

6

NEXT (dB) = 10 LogPower of transmitted signal

Power of measured disturbance


NEXT is Measured in dB


93/143

NEXT is Measured in dB

Disturbance

Ref. 1V

Ratio NEXT

dB0.05 1/20 26. .

0.0316 1/31.6 300.02 1/50 34

.0.005 1/200 46


.

NEXT as a Function of Frequency


94/143

NEXT as a Function of FrequencyNEXT Loss (dB)

90

100

60

70

80

dB

40

50

EXT

in

10

20

30N

0

0.1 10.1 20.1 30.1 40.1 50.1 60.1 70.1 80.1 90.1 100.1


NEXT TIA

(Pair to pair) NEXT


95/143

(Pair-to-pair) NEXT

6 Combinations

A BA

A C

A D

B C

B D

C D


NEXT and Distance to Defect


96/143

NEXT and Distance to Defect

NEAR END FAR END

1 1

2 2

Tx PAIR 100

Rx PAIR 100


Defect at long distance may not be detected

Testing from the Far End

Reveals the Problem


97/143

Reveals the Problem

1 1

23 23

6 6

Rx PAIR100

BAD CONNECTOR

Crosstalk of 24 dB


@ 62.5 MHz

ACR


98/143

ACR

Attenuation to Crosstalk Ratio

One ex ression of Si nal-to-Noise Ratio SNR Calculated performance parameter

e erence e ween n an

Attenuation (in dB) e es per ormance n ca or o e erm ne

useable bandwidth for a two wire-pairsystem

t er parameters p ay a s gn cant ro e n t ebandwidth determination of the cable


Link Performance


99/143

Link Performance

NEXT is used as indicator for quality of components

and workmanship

Alternate indicator for quality: Return Loss

ACR as an indicator of maximum usable bandwidth.

10 dB: still usable signal power

0 dB: noise power equals signal power

you cannot rely on signal energy above the

frequency at which ACR = 0 dB


The New Transmission Model


100/143

The New Transmission Model

Horizontal CablingWorkstation Switch


Example: Gigabit Ethernet (1000BASE-T)

Multiple Pair - Parallel Transmission


101/143

Multiple Pair Parallel Transmission

Far-End Crosstalk (FEXT) adds disturbance

Workstation LAN EquipmentSignal 1Attenuated Signal

Transmit Receive

FEXT

Transmit Receive

gna


SNR = Equal Level Far-End Crosstalk (ELFEXT)

Power Sum ELFEXT


102/143

Power Sum ELFEXT

FEXTPSELFEXT

Attenuatio ELFEXT(signal

erencein dB)


om ne a ec s o a s ur ng pa rs = ower um

Full Duplex Transmission


103/143

p

Return Loss adds disturbance

Signal A to B

Transmit

Signal B to A

ReceiveReceive DirectionalCoupler

Desired signal = attenuated signal from other end.

=


SNR = Return Loss - Attenuation

Category 5e/6 Test Parameters


104/143

g y

Measured Calculated

Wire map

Propagation delay Length, Delay Skew

Attenuation

NEXT (pair-to-pair) PSNEXT, ACR, PSACR

- - ,Return Loss


Developments in Cabling Requirements


105/143

p g qeve opmen a us o ga erne

The IEEE 802.3an committee is studying the

mp emen a on or ga erne over twisted-pair copper cabling (10GBASE-T)

u e e wor s s ac ve y par c pa ng n e

study of medium performance parameters and

This high-performance cabling system will require

Increased frequency range (1 to 500 MHz)


Higher accuracy specification (Accuracy Level IIIe)

10GBASE-T


106/143

IEEE 802.3an task force has delegated the study of

the physical medium to TIA and ISO/IEC

workgroups The signal-to-noise ratio budget analysis is

comp ex an cons s s o wo componen s:

In-channel requirements for all parameters, are,

extended to 500 MHz.

-

becoming very important in the Signal-to-Noise Ratio

referred to as Alien NEXT or Alien ELFEXT


Alien Crosstalk


107/143

adjacent cables

General rules:

This crosstalk is worst between

wire-pairs with the same twist rate

The effect is greater if cables stay

in parallel at the link ends

Impact increases with the distance

over which the cables run in

Impact increases with the

frequency of the transmitted


signals

Twisted-Pair Cabling Expected to Support

10GBASE-T


108/143

Currently Installed Cabling Channel

Length (m)

Comments

ass uppor e o ec veClass E/ Cat 6 UTP 55 Supported (IEEE objective)

Class E / Cat 6 with PSANEXT

testing

55 to 100 Requires additional (field)

test of PS ANEXT

parameter

Future Cabling

Class E / Cat 6 Augmented 100 To be defined Current TIA developments: TSB-155 Draft 1.1 completed in Jan. 2004


-

Standard completion is anticipated in 2006

10 GbE Cabling Study Topics


109/143

Reference measurement data on typical channels

Field study to quantify Alien NEXT coupling

Develop the performance limits up to 500 MHz

Obtain relevant Alien NEXT performance data

From connecting hardware (including patch panels)

From real world cablin s stems

Develop performance specifications for each

component

Applicable standards: TIA TSB-155

Currently in draft 2


A significant amount of work remains!

Links Demand Accuracy Level IV


110/143

Permanent Link test limits: Comparison of the signal

limits for NEXT

The NEXT signal allowed for Class F at 250 MHz is18 times smaller than the NEXT allowed for Class E

Class D Class E Class F

Freq. dB mV dB mV dB mV

1 60 1.00 65 0.56 65 0.56

10 48.5 3.76 57.8 1.29 65 0.56100 32.3 24.27 41.8 8.13 65 0.56


. . . .

Independently Verified Accuracy Level


111/143

, .

verified that:

-specifications in ISO/IEC 61935-1

-

Accuracy Level IIIe specifications in TIA TSB-155

,

executed in full compliance with the standards

,

configuration and the Channel test configuration


inventory

The Channel Measurement

-


112/143

-

Equipm.

Telecom

OutletCP

Cross-

Patch

Cord

PanelHORIZONTAL CABLE




(optional)

Fluke Networks Channel Test Solution


113/143

All FNet testers apply Connector Compensation

Time domain technique to exclude mated NEXT of

the end-connections in the channel adapters The OMNIScanner2 applies near-end compensation only

Remote connector compensation is a unique

capability of the DTX and the DSP Series testers The impact of remote connector compensation is more

important for shorter channels

(80 feet)


Channel Measurement with CC

Cat 6 2-connector channel 185 foot 56.5 m


114/143

100Cat 6 CHNL limit

Worst case margin 1,2-7,8: 7 dB at 34.5 MHz

80

90

, - ,

1,2-4,5

1,2-7,8

3,6-4,5

50

60

70 3,6-7,8

4,5-7,8

30

40

10

20 Connector compensation is a must to deliver an

accurate Channel measurement


0 50 100 150 200 250 300 350 n y e as e vere on s requ remen

Channel Measurement without CC

Cat 6 2-connector channel 185 foot 56.5 m


115/143

Cat 6 CHNL Limit

Worst case margin 3,6-4,5: -3.1 dB at 247 MHz

80

90

1,2-3,6

1,2-4,5

1,2-7,8

3 6-4 5

60

70 3,6-7,8

4,5-7,8

30

40

10

20


0

0 50 100 150 200 250 300 350


116/143

Patch Cord Testing

omp an erm. n


=

omp an erm. n


=


A Patch Cord


117/143

plugs at the end of the patch cord with the jack

(socket)

The jack (socket) of the tester interface must

represent the standard (reference of performance)

Major impact of cordage on Return Loss (RL) of thechannel


Test must include full evaluation of NEXT and RL

Standards Define Patch Cord Test

TIA/EIA 568 B 2 1


118/143

TIA/EIA-568-B.2-1

Paragraph 7.2.1.3: NEXT Loss

NEXT Loss of near-end connection

Worst-case addition of the NEXT Loss of the remote

of the cable

Plus NEXT of patch cord cable

Plus an allowance for reflected FEXT (=0.5 dB)

NEXT Loss test limits of patch cords is length-

dependent Very similar to latest draft of IEC 61935-2


NEXT Measurement


119/143

Adapter Adapter

Main Unit Remote UnitAdapter

Modular Jacks

Modular jacks are the reference

component-level specifications

These acks can also be used to certif Cat 5e atch


cords

Return Loss Measurement

Tester Tester


120/143

Tester

Adapter

Tester

Adapter

Circuit (5dB) for

each wire pair

Main Unit Remote Unit

Main unit is (factory) calibrated using one-port

calibration (Open, Short and precise 100 Load)

To diminish effect of far-end termination:5 dB attenuation circuit in remote adapter


Assure Test Adapters are connected to correct tester unit

Patch Cord Test Adapter

Adapters designed with centered CAT6


121/143

Adapters designed with centered CAT6

reference jacks


Testing a Patch Cord as a Channel is only a

Wire Ma Test Verification


122/143

Channel

Channel test excludes the end connections

Channel limit line assumes

Up to 10 m of patch cord


Channel versus Patch Cord Test Limits

Test limit values for a Cat 6 2m patch cord


123/143

p

compared to the Cat 6 channel limits

NEXT (dB) Return Loss (dB)

Patch Cord Channel Patch Cord Channel

z . . . .

100 MHz 46.4 39.9 18.0 12.0

250 MHz 38.3 33.1 14.0 8.0


performance

What Exactly Is a Good Fiber?

Look to the standards for


124/143

Look to the standards for

guidance

TIA/EIA-568-B.1 describesa good fiber based upon

s app ca on

Horizontal cabling ac one ca ng

Centralized cabling

The BICSI TelecommunicationsDistribution Methods Manual (TDMM)


-

Recognized Fiber Types

Horizontal


125/143

Horizontal

Multimode fiber, 50/125 or 62.5/125 micron

Centralized

Multimode fibercladding

coating

Backbone

Multimode or sin le-mode fiber

Component performance specified in

TIA/EIA-568-B.3


Good Horizontal and Central Cabling1


126/143

Application Loss (dB) Wavelength (nm) Length (m)Horizontal, MM < 2.0* 850 or 1300 90

** ***, .

1 TIA/EIA-568-B.1 definition


1


127/143

Application Loss (dB) (nm) Length

6

7

8

Backbone, MM 3.5/km + 0.75/conn +

0.3/spl

850 2000

3

4

5

l

1300 MMF

I SP SMF

OSP SMF

1.5/km + 0.75/conn +

0.3/spl

1300 2000

0

1

2ac one, . m + . conn +

0.3/spl

1.0/km + 0.75/conn + 1550 2000

length (m )0.3/spl


spl = splice, conn = connection

* 1.0 dB/km ISP, 0.5 dB/km OSP

1 TIA/EIA-568-B.1 definition

Testing Premise Fiber


128/143

Horizontal Fiber

(WA)

Maximum length: 100m (328 ft)

Testing requirements according to ANSI/EIA/TIA 568

B.1:

Backbone Fiber

Fiber from a TR to TR or to ER

Testing requirements according to ANSI/EIA/TIA 568B.1:


wavelengths

Testing Premise Backbone Fiber Tier 1

To test Premise Backbone Fiber (Tier 1) there are 3


129/143

( )

types of testers:

Optical Loss Test Set (Power Meter and Source)

Single Wavelength Fiber Adapters

Dual Wavelength Fiber Adapters


Optical Loss Test Set1. 850nm

2. 1300nm


130/143

InOut

I. Test (1)II. Save

V. Test (2)VI. Save


.

IV. Change meter wavelength

.

VIII. Change meter wavelength

Optical Loss Test Set (Contd)5. 850nm

6. 1300nm


131/143

3. Move 4. Move

InOut

IX. Move test jumper (3-4)XIV. Test (6)

X. Test (5)

XI. Save

XV. Save

XVI. Change source wavelength


XII. Change source wavelength

XIII. Change meter wavelength

.

XVIII. Move test jumper to next fiber

ng e ave eng er ap ers

2. 1300nm

3. Length


132/143

In OutOutIn1. 850nm

I. Autotest (1-3)

II. Save results


ran er ap ers on nue

6. 850nm8. Length


133/143

4. Reconfigure 5. Reconfigure

In OutOutIn

7. 1300nm

III. Reconfigure test jumpers (4-5)

IV. Autotest (6-8)


.

VI. Move test jumpers to next pair

ua ave engt er o u es

4. 1300nm

3. 850nm5. Length


134/143

In OutOutIn1. 850nm

2. 1300nm

I. Autotest (1-5)II. Save results


III. Move test jumpers to next pair

oss s easure s erence n ower

1 Measure power coming out the source


135/143

1. Measure power coming out the source

a c

CableSource Example: Measures - 20 dBmMeter

2. Then measure power after coming out of the fiber link

Patch

Cable

Patch

CableSource

er n

Meter

AdapterExample: Measures - 23 dBm

Adapter


3. The loss is the difference in dB (3 dB in this example)

Dispersion


136/143

The main source of signal distortion in fiber optic

transmissions

Dispersion lengthens the transmitted light pulseas rave s own e er

Measured in pulse-broadening time per unit

eng yp ca y n nsec m

Dispersion is a critical offender for support of


g a a spee s

Dispersion limits link length

Dispersion increases proportionately with the fiber

optic cable length


137/143

optic cable length

When the fiber cable length is too long, pulses runtogether and the receiver can no longer decode


Sources of Loss in Fiber Optic Paths

Dirty connections


138/143

The fiber material

Impurities

Coupling losses between fibers


Losses From Dirty Connections

Dirty connections are the enemy of low-loss fiber

connections


139/143

connections.

Dust blocks light transmission

Finger oil reduces light transmission

Dirt on fiber connectors spreads to other

connections

Be very careful to keep fiber connections clean

You can verify that fibers are clean by using a

fiber sco e to look at the fiber end faces.


Three Different Test Configurations


140/143

Smart Remote Loop Back

Far End Source


Smart Remote Test Mode

The screens below illustrate the Autotest and Set Reference


141/143

setu for this test mode


Loop Back Test Mode

The screens below illustrate the Autotest and Set Reference


142/143

setu s for this test mode


Far End Source Mode

(single fiber testing)

The screens below illustrate the Autotest and Set reference


143/143

setu s for this test mode Sin lemode / Laser li ht source shown


dtx workshops panduit mexico [modo de compatibilidad]

Documents