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Model 4902

Model 4902 G.fast universal noise generator

Main Features

  • Bandwidth 10 kHz to 300MHz
  • Suitable for wide range of applications including VDSL2 Vectoring and G.fast testing
  • Output power to -2.75dBm
  • Crest Factor greater than 5
  • High degree of accuracy
  • Noise Floor less than -153 dBm/Hz (as measured at the output of the noise injector)
  • Expandable, modular design
  • High-density version holds up to 6 (2 or 4-port) AWG cards for a maximum of 24 AWG outputs
  • Portable version holds up to 4 (2 or 4-port) AWG cards for a maximum of 16 AWG outputs
  • Inject crosstalk and impulse noise combined
  • Independent control of each AWG output
  • Select from common crosstalk types such as ADSL, VDSL2, and G.fast
  • Impulse noises such as REIN, SHINE, PEIN, and Switching Power Supply noise
  • Specify NEXT, FEXT and number of disturbers
  • Add in RFI and AWGN (at variable levels)
  • Specify impedance, sampling rate and DUT location
  • Optional Noise Modules setup and run all tests in standard automatically
  • Design custom loops with Loop Configuration Editor
  • Save custom noise files or entire configurations to repeat tests with ease and accuracy
  • Import MATLAB (.mat), CSV, or Excel (.xls) noise files
  • Remote control via Ethernet
  • Adjust Amplitude of Crosstalk and Impulse noise
  • G.fast Specific Noise
  •     Background Gaussian Noise (Piecewise Flat, Colored)
  •    High Frequency Impulse Noise (PEIN, SHINE)
  •    PLC Noise
  •    RFI (FM, Broadcast TV)
  •    Spark Plug Ignition Noise
  •    Reverse Power Feed Noise Download pdf

  • product overview

    G.fast technology promises to bring a wealth of new opportunities to Service Providers as well as manufacturers of DPUs, CPE Modems and Chipsets. This exciting new technology allows for a more efficient use of existing copper infrastructure by utilizing the spectrum above 30 MHz and by cancelling the crosstalk between pairs within a cable. This increases data rates far beyond current levels, making bandwidth-intensive applications such as IPTV and Triple Play available in many areas where it was not possible before.

    The Model 4902 Universal G.fast Noise Generator is available in two versions – portable and rack-mountable. The portable unit provides 2 to 16 independent Arbitrary Waveform Generator (AWG) outputs and includes a keyboard and built-in display. The higher-density version is rack-mountable and may be configured for 2 to 24 independent AWG outputs.

    User-friendly configuration software allows the user to select and build impairment models common to DSL network implementations using ADSL2+, VDSL2, VDSL2 vectoring and G.fast. A generous assortment of custom crosstalk as well as impulse noises (e.g., REIN, SHINE and PEIN) can be created. It can also generate a wide variety of interferences above 30 MHz that may impact G.fast deployments. These include background Gaussian noise, high frequency impulse noise (PEIN, SHINE), FM radio, Broadcast TV, Spark Plug Ignition noise, PLC noise, Reverse Power Feed noise and more. In addition, user-defined files in several formats (such as MATLAB. CSV and Excel) may be imported. Optional noise modules automatically setup standards-based testing for TR-114, TR-105, TR-115, TR-100 and more. 

    The 4902 also works with an optional stand-alone noise injector, the Model 4902-D4, for injecting independent differential mode noise on 4 channels of the CO (or CPE) side of the loop or the VxT-N48 for injecting noises up to 30 MHz over 48 channels (independent or distributed).

     

    The Model 4902-D4 provides four channels of  independent differential mode noise injection.

    Ordering Options


    Model Number Description
    4902-Portable Telebyte Portable computer w/built-in display & keyboard.
    Includes Noise Generation Software.
    Accepts 1-4, 4902-AWGx cards.
    4902-HD Telebyte High-Density, rack-mountable computer.
    Includes Noise Generation Software.
    Accepts 1-6, 4902-AWGx cards.
    4902-AWG2-300 2-Port AWG Card - 600 MS/s, supports 1 kHz to 300MHZ
    4902-AWG4-300 4-Port AWG Card - 600 MS/s, supports 1 kHz to 300MHZ
    4902-AWG2-30 2-Port AWG Card – 60 MS/s, supports 1 kHz to 30 MHz
    4902-AWG4-30 4-Port AWG Card – 60 MS/s, supports 1 kHz  to 30 MHz
    4902-D4 4-Channel Differential Mode Noise Injector (10 kHz to 120 MHz)
    VxT-N48 48-Channel AWGN Generator/Injector (20 kHz to 30 MHz)
    4901-D1-Micro

    1-Channel Differential Mode Noise Injector (1 kHz to 30 MHz) Plus Micro Interrupts
    4902-N6 Optional Noise Module for TR-067
    4902-N10 Optional Noise Module for TR-100
    4902-N11 Optional Noise Module for TR-114
    4902-N12 Optional Japanese Noise Library – Including TCM-ISDN Noise Files, SHDSL NTT Noise Files; Half, Single & Double ADSL Disturbers NTT Noise Files; 3-Band, 4-Band & 6-Band VDSL NTT Noise Files
    4902-N16 Optional Noise Module for TR-105
    4902-N17 Optional Noise Module for TR-115<
    4902-N18 Optional Noise Module for G.shdsl
    4902-N20 Optional Noise Module for VDSL2 vectoring
    4902-N21 Optional Noise Module for G.fast ID-337


    Specifications

     

    4902-Portable Specifications  
    Remote Commands Telnet

    Included Software

    Telebyte Universal G.fast Noise Generator Software

    Power supply

    AC 90 V to 264 V, 47 to 63 Hz

    Operating Temperature Range 0 to 50 º C
    Operating Relative Humidity 5% - 95% non-condensing
    Mechanical Dimensions DxWxH: 9.5" D x 13.5" W x 17.5" H
    Weight

    32 lbs

    Connectors 10 USB 3.0 Ports, 4 USB 2.0 Ports (2 front), 2 RJ-45 Gigabit LAN

    Display

    Integrated 17.3-in WUXGA+ (1920 x 1080) display
     
    4902-HD Specifications
    Remote Commands Telnet
    Included Software

    Telebyte Universal G.fast Noise Generator Software

    Power supply

    AC 90 V to 264 V, 47 to 63 Hz

    Operating Temperature Range 0 to 50 º C

    Operating Relative Humidity

    5% - 95% non-condensing

    Mechanical Dimensions DxWxH: 19.5" D x 16.8" W x 7.0" H

    Weight

    32 lbs

    Connectors

    10 USB 3.0 Ports, 2 eSATA Ports, 2 RJ-45 Gigabit LAN

     
    4902-AWGx-30 Specifications

    Bandwidth

    1 kHz to 30 MHz

    Noise Outputs

    4902-AWG2-30: 2

    4902-AWG4-30: 4

    Interference Profile Accuracy

    ≤ 0.5 dB mean absolute error (MAE) for Crosstalk PSD

    AWGN Crest Factor

    > 5

    AWGN Gap

    < 10%

    Output Impedance

    50Ω unbalanced

    SMB Connectors

    4902-AWG2-30: 2

    4902-AWG4-30: 4

     
    4902-AWGx-300 Specifications

    Bandwidth

    1 kHz to 300 MHz

    Noise Outputs

    4902-AWG2-300: 2

    4902-AWG4-300: 4

    Interference Profile Accuracy

    ≤ 0.5 dB mean absolute error (MAE) for Crosstalk PSD

    AWGN Crest Factor

    > 5

    AWGN Gap

    < 10%

    Output Impedance

    50Ω unbalanced

    SMA Connectors

    4902-AWG2-300: 2

    4902-AWG4-300: 4

     
    4902-D4 Noise Injector Specifications
    Bandwidth 10 kHz to 120 MHz continuous frequency response of signal path
    Injection Type Differential Mode
    Output Impedance Differential Mode > 4 k Ω  
    Insertion Loss of Noise Injection Path Differential Mode 0/20 dB ± 0.5dB  

    Maximum RMS Output +5 dBm into 50 Ω
    Crest Factor Greater than 5

    Noise Floor Below -153 dBm/Hz as measured at the output of the noise injector

    Connectors SMA: (2) Female Connectors per channel for Independent Differential Mode noise from 4902-Portable or 4902-HD

    8 Cat6 RJ-45 Connectors on front (2 Input/Outputs for each channel)
    Micro Interruptions Location: On any single channel

    Method: Type-1, Type-2, or Type-3 as defined in
    TR-249 Issue 1

    Interrupt Time: 5ms to 100ms in 1-ms increments
     
    4901-D1-Micro Specifications  
    Bandwidth

    1 kHz to 30 MHz

    Output Impedance

    4kΩ Minimum (1 kHz to 30 MHz)

    Input Impedance

    50Ω unbalanced (100Ω unbalanced*)

    Output Mode

    Differential, balanced

    Noise Floor

    Below –145 dBm/Hz as measured at the output of the noise injector

    Insertion Loss

    13.0/35 dB ± 0.5 dB

    Connectors

    SMB Female Connector for 4902-Portable or 4902-HD,  RJ45 (2) Female Connectors for Loop Simulator (external cable provided) and for the modem.

    Micro Interruptions

    ·         Method:  Type-1 as defined in TR-249 Issue 1

    ·         Interrupt Time: 1ms to 250ms in 1-ms increments

     

    Specifications are subject to change without notice. Made in USA.