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VeEX MTTplus-523 User Manual

G.fast/dsl module
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MTTplus-523_e-manual, D07-00-117P RevA00

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Summary of Contents for VeEX MTTplus-523

  • Page 1 MTTplus-523_e-manual, D07-00-117P RevA00...

  • Page 2: Table Of Contents

    MTTplus-523_e-manual, D07-00-117P RevA00 Table of Contents 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...

  • Page 3: About This User Manual

    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.

  • Page 4: Safety Information

    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.
  • Page 5 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. Go back to top Go back to TOC...

  • Page 6: Introduction

    MTTplus-523_e-manual, D07-00-117P RevA00 3.0 Introduction 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...

  • Page 7: Basic Operations

    4.0 Basic Operation 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.

  • Page 8: Dsl/G.fast Overview

    DSLAM or customer's modem can also be assessed. The MTTplus-523 offers the following test functions: Emulates customer modem (XTU-R or G.Fast FTU-R) to prove that synchronization or link up with DSLAM / DPU is...
  • Page 9 MTTplus-523_e-manual, D07-00-117P RevA00 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 downstream frequencies below 1.1 MHz and associated interference.
  • Page 10 MTTplus-523_e-manual, D07-00-117P RevA00 Note: Annexes: Similar to ADSL and ADSL2+, VDSL2 includes regional bandplan annexes that specify PSD Masks which are designed to coexist with other services. Annex A specifies bandplans for the North American and enables VDSL2 to be deployed with traditional POTS telephony. Annex B specifies bandplans for Europe and and enables VDSL2 deployment with underlying POTS and ISDN services.
  • Page 11 MTTplus-523_e-manual, D07-00-117P RevA00 G.fast is ideally suited for Fiber to the Distribution Point (FTTdp), where pure FTT deployment costs remain high. G.fast enables telecommunications service providers to stay competitive with cable operators, offering Gigabit+ services based on DOCSIS 3.x. G.fast highlights: Aggregate data rate targets of up to 1 Gbps for short copper loops, less than 300 meters.

  • Page 12: Dsl/G.fast Measurements

    MTTplus-523_e-manual, D07-00-117P RevA00 6.0 DSL/G.fast Measurements The DSL synchronization process for the MTTplus-523 is outlined as follows: 1. Activation, Discovery or Handshaking: Powering on the unit takes the DSL modem into activation and acknowledgement phase, also known as handshaking. The goals of this are to determine which tones can be used and how many bits can be assigned to each tone.
  • Page 13 MTTplus-523_e-manual, D07-00-117P RevA00 Go back to top Go back to TOC 6.2 Line Status The current measurements displayed include the following: Rate (kbps): Downstream and Upstream rate Max (kbps): Maximum Downstream and Upstream rate Capacity (%): Ratio of the actual rate versus the maximum bit rate SNR Margin (dB): Signal to Noise Ratio margin Attenuation (dB): Difference in the power level transmitted at the near end and received at the far end Delay (ms): Interleave delay...
  • Page 14 MTTplus-523_e-manual, D07-00-117P RevA00 G.Fast Mode lists the following key G.fast measurements: Net Data Rate (kbps): Current achieved data rate Expected Throughput Rate (kbps): The rate available in Showtime assuming full protection against an impulse noise environment Aggregate Rate: The sum of Downstream and Upstream rates SNR Margin (dB): Maximum dB increase in equalized noise or maximum dB decrease in equalized signal that a system can tolerate and maintain a BER of 1E-7 Start (ST) and duration time (ET), DSL synchronization status, ADSLx/VDSLx mode and profile, and estimated length are...
  • Page 15 MTTplus-523_e-manual, D07-00-117P RevA00 Line and channel performance measurements include the following: CRC: Received CRC-8 code word does not match the code word transmitted. A count of the superframes that contained CRC. Forward Error Correction (FEC): Count of near end Reed-Solomon forward error correction anomalies for the interleaved or fast data streams.
  • Page 16 MTTplus-523_e-manual, D07-00-117P RevA00 G.fast mode displays the same errors as other ADSLx/VDSLx modes along with the followings near end performance counters: RTX-TX:Retransmitted frames may be sent to mitigate impulse noise in place of FEC or interleaving RTX-Uncorrected RTX Seamless Rate Adaptation (SRA) Fast Rate Adaptation (FRA) Go back to top Go back to TOC 6.3 Tones...
  • Page 17 MTTplus-523_e-manual, D07-00-117P RevA00 The graph can display two different scales using Zoom In: The first scale displays all the tones on the same screen. Tap Zoom In to display a smaller range of tones on screen. Move the pointer past 127 to view tones 128-255 in one screen.
  • Page 18 MTTplus-523_e-manual, D07-00-117P RevA00 Bits per Tone Graph Interpreting the Results The lower frequency tones represent the bandwidth used for the upstream signal. The higher frequency tones at the right show the frequencies used for the downstream signal. The bits should drop to zero after the end of the upstream. This is the buffer between the upstream and downstream signals.
  • Page 19 MTTplus-523_e-manual, D07-00-117P RevA00 bits. However, due to the face that a minimum of 2 bits (QAM-4) are encoded per bin, the SNR of any single bin cannot drop below 6dB. Raw SNR per Tone Go back to top Go back to TOC 6.3.3 HLOG HLOG provides an attenuation vs carrier bin frequency graph.
  • Page 20 MTTplus-523_e-manual, D07-00-117P RevA00 Go back to top Go back to TOC 6.3.4 Quiet Line Noise (QLN) QLN provides a quiet line noise vs. carrier bin Spectrum graph. This can help detect the presence of RF interference on the copper pair under test. Go back to top Go back to TOC 6.3.5 Events The Events tab displays a date and time log of events such as synchronization status and errors that occur during testing.
  • Page 21 MTTplus-523_e-manual, D07-00-117P RevA00 Go back to top Go back to TOC...

  • Page 22: Common Functions

    MTTplus-523_e-manual, D07-00-117P RevA00 7.0 Common Functions Tools tab The following functions are common to all VeEX test sets: Tool Utilities Files Go back to top Go back to TOC...

  • Page 23: Reveal Software

    MTTplus-523_e-manual, D07-00-117P RevA00 8.0 ReVeal Software For more information on using the ReVeal CX300 software, refer to the user manual on the VeEX website. Go back to top Go back to TOC...

  • Page 24: Warranty And Software

    Replace hardware which prove to be defective provided that the products that the customer elects to replace are returned to VeEX Inc. by the customer, along with Proof of Purchase, within thirty (30) days of the request by the customer, freight prepaid.

  • Page 25: Product Specification

    MTTplus-523_e-manual, D07-00-117P RevA00 10.0 Product Specifications The most recent product specifications can be downloaded here from the VeEX website. Go back to top Go back to TOC...

  • Page 26: Certification And Declarations

    Use of this logo implies that the the unit conforms to requirements of European Union and European Free Trade Association (EFTA). EN61010-1 Click here for CE Declaration of Conformity relating to VeEX products What is RoHS? RoHS is the acronym for Restriction of Hazardous Substances. Also known as Directive 2002/95/EC, it originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products.

  • Page 27: About Veex

    MTTplus-523_e-manual, D07-00-117P RevA00 12.0 About VeEX VeEX, Inc., the Verification EXperts, is an innovative designer and manufacturer of test and measurement solutions addressing numerous technologies. Global presence through a worldwide distribution channel provides uncompromised product support. Visit us online at www.veexinc.com...

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