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R&S®CLGD DOCSIS cable load generator

Multichannel signal generator for DOCSIS 3.1 downstream and upstream

R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator
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R&S®CLGD DOCSIS cable load generator, Front view R&S®CLGD DOCSIS cable load generator, Front High R&S®CLGD DOCSIS cable load generator, Side view R&S®CLGD DOCSIS cable load generator, Back view R&S®CLGD DOCSIS cable load generator, Hero view R&S®CLGD DOCSIS cable load generator, Application Image

Key facts

  • FDX – Full duplex DOCSIS generator
  • Downstream: 47 MHz to 1218 MHz/1794 MHz, Upstream: 5 MHz to 204 MHz
  • Frequency range in upstream: 5 MHz to 204 MHz
  • DOCSIS 3.1, DOCSIS 3.0, J.83/A/B/C and analog TV
  • Up to eight times 192 MHz signal bandwidth for DOCSIS 3.1; ARB generator bandwidth up to 200 MHz

DOCSIS 3.1 full channel load, realtime generator

The R&S®CLGD is a multichannel signal generator for simulating a cable TV network with full channel loading. It generates broadband data signals for DOCSIS 3.1 as well as digital and analog TV channels. Signals can be freely combined in the downstream or upstream, allowing users to simulate any conceivable channel loading scenario in the lab.

Features & benefits

FDX – Full duplex DOCSIS generator

Latest DOCSIS standard for symmetric gigabit service

The CLGD FDX mode extends CLGD functionality with FDX test feature set and includes the generation of:

  • FDX downstream channels
  • Upstream channels over the FDX band
  • FDX sounding signals

Flexible feature set including interferences and impairments allows to test cable modems according to the FDX standard.

Flexible DOCSIS 3.1 and FDX spectrum allocation with R&S®CLGD
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Flexible DOCSIS 3.1 and FDX spectrum allocation with R&S®CLGD

Full channel load in the downstream

Flexible realtime downstream modulation

The R&S®CLGD modulates signals for DOCSIS 3.1, DOCSIS 3.0, digital cable TV in line with J.83/A/B/C in real time. Its downstream frequency range is 47 MHz to 1794 MHz for DOCSIS3.1 and 47 MHz to 1218 MHz for DOCSIS3.0 and digtal TV. All parameters can be set via GUI or via SCPI remote commands. The user data to be transmitted can be fed in via IP or internally generated by the R&S®CLGD.

R&S®CLGD GUI - Multiple DOCSIS 3.1 channels
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R&S®CLGD GUI - Multiple DOCSIS 3.1 channels

The R&S®CLGD provides up to eight DOCSIS 3.1 channels. All channels can be set via GUI independently of each other.

Multichannel upstream signal generation

Flexible multichannel upstream modulation

The upstream frequency range is 5 MHz to 204 MHz. Within this range, a flexible combination of DOCSIS 3.1 (OFDMA) and DOCSIS 3.0 (TDMA or CDMA) signals can be generated. The trigger function allows precise burst timing control. The R&S®CLGD is an ideal solution for testing tuners, cable modems and upstream CMTS receivers.

R&S®CLGD GUI - Upstream generation
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R&S®CLGD GUI - Upstream generation

Easy to use GUI allows the setup of the upstream signal with all required parameters. Predefinded values speed up the time to the first results.

Signal interference and distortion simulation

Simulate realistic receive conditions

For realistic signal generation, the R&S®CLGD can add interference such as noise, impulsive noise, phase noise, AC hum, tilt and microreflections. The signal tilt can be set positive or negative for simulation or compensation of the frequency response of a real coax CATV cable.

R&S®CLGD GUI - Impairments configuration
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R&S®CLGD GUI - Impairments configuration

The influence of signals in adjacent channels with impairments is a research topic of great interest. The R&S®CLGD makes such simulations possible.

From DOCSIS 3.0 to DOCSIS 3.1

Simulate any conceivable channel loading scenario in the lab

The R&S®CLGD is a multichannel signal generator for simulating a cable TV network with full channel loading. It generates broadband data signals for DOCSIS 3.1 as well as digital and analog TV channels. In the downstream or upstream, signals can be freely combined, allowing users to simulate any conceivable channel loading scenario in the lab.

R&S®CLGD - Flexible CATV channel plans
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R&S®CLGD - Flexible CATV channel plans

The R&S®CLGD is ideal for examining the mutual influence between DOCSIS 3.1, 3.0 and TV channels to ensure the coexistence of new data services.

Available options

Software options
Product
Description
R&S®CLGD-K2

Order number 2118.7469.02

Description

Basic Waveform Library

Bundle of frequently used waveforms

R&S®CLGD-K200

Order number 2118.6962.02

Description

Downstream Generator - DOCSIS 3.1/3.0, J.83/A/B/C, downstream modulation, 47 MHz to 1218 MHz

R&S®CLGD-K201

Order number 2118.7798.02

Description

Enhanced Functions - Insertion of DOCSIS timestamps in downstream PLC, flow rate indicator and additional transmission of DPD messages for profiles B, C and D on the PLC (FSW compatibility mode)

R&S®CLGD-K300

Order number 2118.6979.02

Description

Upstream Generator - DOCSIS 3.1 and 3.0, upstream modulation, 5 MHz to 204 MHz

R&S®CLGD-K400

Order number 2118.8307.02

Description

FDX - Full Duplex DOCSIS generator for OFDM carriers up to 1218 MHz, FDX carriers 108-684 MHz, Sounding tones (OUDP sounding)

R&S®CLGD-K1050

Order number 2118.6991.02

Description

Impairments Simulation - DOCSIS 3.1/3.0, J.83/A/B/C, analog TV, Downstream modulation, 47 MHz to 1218 MHz

R&S®CLGD-K3018

Order number 2118.6985.02

Description

Extended Frequency Range - Interferer simulation, AWGN, phase noise, AC hum, micro reflections

Recommended extras
Product
Description
R&S®ZZA-KN2

Order number 1175.3010.00

Description

19" Rack Adapter

For mounting a 19" housing 2 RU high in a standard 19" rack

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