VeEX MTTplus-523 User Manual

MTTplus-523_e-manual, D07-00-117P RevA00

Table of Contents

MTTplus-523_e-manual, D07-00-117P RevA00

1.0 About this User Manual

2.0 Safety Information

3.0 Introduction

3.1 MTTplus-523 Overview

3.2 Evolution of Residential DSL to G.fast

4.0 Basic Operations

4.1 Touch-Screen Display

4.2 Battery

4.3 Connector Panel

5.0 DSL/G.fast Overview

6.0 DSL/G.fast Measurements

7.0 Common Functions

8.0 ReVeal Software

9.0 Warranty and Software

10.0 Product Specification

11.0 Certification and Declarations

12.0 About VeEX

Go back to top

1.0 About This User Manual

MTTplus-523_e-manual, D07-00-117P RevA00

This user manual is suitable for novice, intermediate, and experienced users and is intended to help you successfully use the
features and capabilities of the different modules for test platforms. It is assumed that you have basic computer experience and
skills, and are familiar with IP and telecommunication concepts, terminology, and safety.

Every effort was made to ensure that the information contained in this manual is accurate. However, information is subject to
change without notice. We accept no responsibility for any errors or omissions. In case of discrepancy, the web version takes
precedence over any printed literature.

(c) Copyright 2006-2017 VeEX Inc. All rights reserved. VeEX, VePAL are registered trademarks of VeEX Inc. and/or its affiliates
in the USA and certain other countries. All trademarks or registered trademarks are the property of their respective companies.
No part of this document may be reproduced or transmitted electronically or otherwise without written permission from VeEX Inc.

This device uses software either developed by VeEX Inc. or licensed by VeEX Inc. from third parties. The software is confidential
and proprietary of VeEX Inc. The software is protected by copyright and contains trade secrets of VeEX Inc. or VeEX's licensors.
The purchaser of this device agrees that it has received a license solely to use the software as embedded in the device, and the
purchaser is prohibited from copying, reverse engineering, decompiling, or disassembling the software.

For more technical resources, visit the VeEX Inc. web site at
this product, call or e-mail our customer care department for customer support. Before contacting our customer care department,
have the product serial number and software version ready. Please locate the serial number on the back of the chassis. Please
provide this number when contacting VeEX customer service.

Customer Care:

Phone: + 1 510 651 0500

E-mail:

Website:

Go back to top Go back to TOC

[e-mail]

www.veexinc.com

www.veexinc.com. For assistance or questions related to the use of

2.0 Safety Information

MTTplus-523_e-manual, D07-00-117P RevA00

Safety precautions should be observed during all phases of operation of this instrument. The instrument has been designed to
ensure safe operation however please observe all safety markings and instructions. Do not operate the instrument in the
presence of flammable gases or fumes or any other combustible environment. VeEX Inc. assumes no liability for the customer's
failure to comply with safety precautions and requirements.

Lithium-ion Battery Precautions

Lithium-ion (Li-ion) battery packs are compact and offer high capacity and autonomy, which make them ideal for demanding
applications, like providing long lasting power to portable test equipment. For safety reasons, due to their high energy
concentration, these batteries packs and products containing them must be used, charged, handled, and stored properly,
according to the manufacturer’s recommendations.

Li-ion battery packs contain individual Li-ion cells as well as battery monitoring and protection circuitry, sealed in its plastic
container that shall not be disassembled or serviced.

The test set unit's battery pack is also fitted with a safety connector to prevent accidental short circuits and reverse polarity.

Always charge the unit's battery pack inside the test platform battery bay using the AC/DC adapter supplied by VeEX.
Do not charge or use the battery pack if any mechanical damage is suspected (shock, impact, puncture, crack, etc).
Do not continue charging the battery if it does not recharge within the expected charging time
Storage: For long term storage, the battery pack should be stored at 20°C/68°F (room temperature), charged to about 30
to 50% of its capacity. Spare battery packs should be charged and used at least once a year to prevent over-discharge
(rotate them regularly).
It is recommended to charge and use battery packs at least every three months. Battery packs shall not go without
recharging (reconditioning) for more than six months.
After extended storage, battery packs may reach a deep discharge state or enter into sleep mode. For safety reasons, Li­ion batteries in deep discharge state may limit the initial charging current (pre-recharge) before starting their regular fast
charging cycle. The pre-charging state may take several hours.
Air transportation of Li-ion batteries is regulated by United Nations' International Air Transportation Association (IATA)
Dangerous Goods Regulations and by country-specific regulations. Please check local regulations and with common
carriers before shipping Li-ion battery packs or products containing relatively large Li-ion battery packs.

Electrical Connectors

Telephone lines may carry dangerous voltages. Always connect the electrical test ports to known test interfaces which carry low
level signals.

Test modules could be affected by electrostatic discharge. To minimize the risk of damage
when replacing or handling test modules, make sure to follow proper ESD procedures and
dissipate any electrostatic charge from your body and tools and the use proper grounding
gear.

Perform all work at a workplace that is protected against electrostatic build-up and
discharging.

ESD: Electrostatic Discharge Sensitive Equipment

Go back to top Go back to TOC

MTTplus-523_e-manual, D07-00-117P RevA00

Never touch any exposed contacts, printed circuit boards or electronic components.
Always store test modules in ESD protected packaging.
Wear ESD protection and grounding gear when:

Inserting, extracting, or handling test modules.
Connecting or disconnecting cables from modules or platform.

3.0 Introduction

MTTplus-523_e-manual, D07-00-117P RevA00

3.1 MTTplus-523 Overview

The MTTplus-523 module offers Customer Premise Equipment emulation mode for G.fast, VDSL2, and ADSL2+, to verify
broadband service performance for xDSL and G.fast networks.

3.2 Evolution of Residential DSL to G.fast

DSL Network Types

CPE Emulation for ADSLx, VDSL2, and G.fast

As DSL technology continues to improve, the copper wire length from a broadband provider's distribution point to the customer
premise has decreased, providing even greater speeds to customers.

ADSL relied solely on existing copper telephone wire infrastructure, connecting from the Digital Subscriber Line Access
Multiplexer (DSLAM) at the provider's central office to reach customer premises. With VDSL, fiber from the CO is deployed to a
DSLAM at an optical node (FTTN) closer to the customer premise, further shortening the length of copper cabling. VDSL2 and
G.fast are capable of closing the distance from a distribution point (FTTdp) to a few hundred meters of the end subscriber. G.fast
supports speeds of 150 Mbps to 1 Gbps depending on the distance from the distribution point.

Go back to top Go back to TOC

4.0 Basic Operation

MTTplus-523_e-manual, D07-00-117P RevA00

For information on Basic Operations, Home menu, Launching Test Applications, and other features specific to the MTTplus Host
Chassis, refer to the MTTplus Platform Manual. The following sections describe basic operations for the MTTplus-523 module.

4.1 Touch-Screen Display

The LCD supports touch-screen operation. To operate the touch-screen, use the stylus located in the top cover to navigate the
menus and tabs. Please observe the following precautions:

Never use excessive pressure on the touch-screen as this may damage its functionality.
Never use sharp objects such as a pen, screwdriver etc. as this may damage the surface.
Clean the surface of the touch screen using a soft cloth and mild detergent only. Do not use alcohol.

Go back to top Go back to TOC

4.2 Battery

The MTTplus chassis is equipped with an intelligent Li-ion rechargeable battery pack which is located in the rear of the unit. The
battery will be partially charged upon delivery, so it is recommended to charge the battery fully before use. Please charge the
battery at room temperature to preserve its life and to obtain maximum charge. The battery is charged during operation provided
the unit is connected to the AC Mains using the supplied AC adapter. Removing the battery, while the unit is powered on is not
recommended - this may result in damage. Charge the battery by connecting the AC Main adapter to the power jack on the left
side.

Go back to top Go back to TOC

4.3 Connector Panel

The MTTplus-523 module supports CPE mode:

RJ11 LINE interface for G.fast and DSL
RJ45 Ethernet Port, for DSL to PC Pass Through mode

Go back to top Go back to TOC

Connector Panel

5.0 DSL/G.fast Overview

Also known as ITU-T G.992.5, the standard extends the capability of basic ADSL by doubling the number of downstream tones

MTTplus-523_e-manual, D07-00-117P RevA00

ADSLx and VDSL2 technology uses the copper pair between the exchange or street cabinet and the customer premises. The
usable bandwidth is extended from 4 kHz to 2.2 MHz in the case of ADSL2+ and up to 30 MHz for VDSL2. Extended bandwidths
make the copper pair far more susceptible to faults, impairments and other degradation. Modem Emulation testing at this layer
not only
assessed.

The MTTplus-523 offers the following test functions:

Go back to top Go back to TOC

ANSI

Defined by the American National Standards Institute (ANSI) Telecommunications Committee, T1.413 was the first standardized
ADSL specification. The underlying modulation is Discrete Multi-Tone (DMT) line code which divides the bandwidth of the
standard two wire copper wire used in the PSTN into 256 separate 4.3125kHz wide bins called sub-carriers. Even though each of
these 256 sub-carriers or tones can support a modulation of up to 15 bits, the maximum achievable downstream data rate is
actually 8.128 Mbit/s due to error checking and related overhead data. In the upstream direction, a maximum of 30 sub-carriers is
used, each tone being modulated with up to 15 bits providing a maximum theoretical throughput of just over 1.5 Mbit/s.

provides information about the copper's performance, but connection to the DSLAM or customer's modem can also be

Emulates customer modem (XTU-R or G.Fast FTU-R) to prove that synchronization or link up with DSLAM / DPU is
possible
Provides key link performance statistics - measures downstream bit rate, upstream bit rate, max bit rate, relative capacity,
signal to noise (SNR) margin, and attenuation among other measurements
Carrier Tone statistics in both graphical and table format
Error metrics and Events Table

DMT

Also referred to as ITU G.992.1, the standard expands the usable bandwidth of existing copper telephone lines to rates up to 12
Mbit/s downstream and 1.3 Mbit/s upstream. Discrete Multi-Tone (DMT) mode, divides the ADSL signal into 255 carriers (bins)
spaced in multiples of 4.3125kHz. The DMT spectrum has 224 downstream frequency bins and up to 31 upstream bins.

In Annex A systems where Voice (POTS) is used on the same line, the frequency spectrum can be outlined as follows:

0-4kHz is allocated to Voice traffic
4-25kHz is an unused guard band
25-138kHz is for Upstream data
138-1107kHz is for Downstream data (ADSL)
138-2208kHz is for Downstream data (ADSL2+)

ADSL2

Also known as ITU-T G.992.3, the standard extends basic ADSL data rates to 12 Mbit/s downstream and 3.5 Mbit/s upstream;
however, actual speeds are dependent on line quality - the most significant factor being loop length.

ADSL2+

providing data rates as high as 24 Mbit/s downstream and 1 Mbit/s upstream depending on loop length. ADSL2+ can also be

used to reduce crosstalk because it provides the capability to use only tones between 1.1 MHz and 2.2 MHz, thus masking the

MTTplus-523_e-manual, D07-00-117P RevA00

downstream frequencies below 1.1 MHz and associated interference. This is also referred to as Spectral Masking.

ADSL2+ Frequency Spectrum

VDSL2

Frequency configuration options of 8.5 MHz, 12 MHz, 17.7 MHz, and 30 MHz are set automatically depending on DSLAM
settings.

Note: Impulse Noise Protection (INP)

Electrical appliances and installations at customer premises often generate short bursts of noise of relatively
high amplitude. These bursts, called impulse noise, are electromagnetically coupled into the digital
subscriber line, degrading performance and in some cases disrupting service. The ADSL2/+ standard
introduced a parameter called Impulse Noise Protection (INP), that allows operators to select the maximum
impulse length that the DSL system can correct.

VDSL2 uses the same parameter and when implemented, an INP value between 2 and 16 can correct
errors from noise impulses ranging from 250µs to 3.75ms in length.

INP is a key feature in most IPTV video deployments and enables better Video QOS by minimizing the
effects of Impulse Noise.
The INP value for the interleaved channel can be set by the user and is expressed in symbols. For
example, an INP value of 1 means that 1 symbol can be corrected i.e. a burst of noise for 1 symbol
duration can be corrected without errors. One symbol equals 250µs, therefore an INP of 1 correlates to a
correction time of 250µs.
The Impulse Noise Protection (INP) or interleave depth is defined by the S and D parameters where:

S is the Interleave DMT symbols per FEC code word (1, 2, 4, 8, 16)
D is the Interleave depth (1, 2, 4, 8, 16, 32, 64)
Interleave delay can vary from 4.25 to 263.75 msec