產品明細

CLGD

DOCSIS全頻道負載信號產生器

    產品簡述
    ♦ 支援DOCSIS 3.1/3.0, J.83/A/B/C and analog TV
    ♦ 支援Downstream: 47 MHz to 1218 MHz/1794 MHz, Upstream: 5 MHz to 204 MHz
    ♦ 支援FDX – Full duplex DOCSIS 4.0 generator
    ♦ 提供最多8個DOCSIS 3.1 downstream 192 MHz signal bandwidth
    ♦ 支援任意波形產生器(ARB generator) bandwidth up to 200 MHz
      詢價

      產品詳細介紹Product Introduction

      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. In the downstream or upstream, signals can be freely combined, allowing users to simulate any conceivable channel loading scenario in the lab.

      The R&S®CLGD is the first generator that simultaneously produces signals for DOCSIS 3.1, DOCSIS 3.0, digital cable TV in line with J.83/A/B/C and analog cable TV. Its downstream frequency range is 108 MHz to 1794 MHz for DOCSIS 3.1 and 47 MHz to 1218 MHz for TV. Within this range, the R&S®CLGD generates multiple DOCSIS 3.1 channels with up to 192 MHz bandwidth each. The level, frequency, forward error correction (FEC) and constellation of these channels can be set independently. At the same time, the R&S®CLGD produces a large number of digital and analog TV signals that can be placed anywhere below or between the DOCSIS 3.1 signals. The DOCSIS 3.1 channels and digital TV channels are implemented in realtime. The data to be transmitted can be fed in via IP or internally generated by the R&S®CLGD. The upstream frequency range is 5 MHz to 204 MHz. Within this range, DOCSIS 3.1 orthogonal frequency division multiple access (OFDMA) signals can be freely combined with DOCSIS 3.0 TDMA or CDMA signals.

      The flexible multichannel signal generation capabilities of the R&S®CLGD enable it to simulate network loading in a reproducible manner, making it ideal for testing tuners, cable modems and upstream CMTS receivers. The influence of QAM and TDMA/CDMA signals in adjacent channels on DOCSIS 3.1 signal reception is a research topic of great interest. The R&S®CLGD makes such simulations realistic by adding different types of interference, such as noise, reflections and narrowband interference.

      The generator is accommodated in a 19" housing that takes up a mere two height units. The complex signal generation process can be conveniently controlled from a PC or via a web interface. Remote control through SCPI commands enables the generator to be used in automatic test systems. The R&S®CLGD can be adapted to various application requirements thanks to its software option concept.

      Features
      • Frequency range in downstream: 47 MHz to 1218 MHz, extendable to 1794 MHz
      • Frequency range in upstream: 5 MHz to 204 MHz
      • Up to eight times 192 MHz signal bandwidth for DOCSIS 3.1
      • ARB generator bandwidth up to 200 MHz

      • Signal generation for channel loading scenarios in the downstream
        • Realtime modulation of DOCSIS 3.1 and J.83/A/B/C
        • Combined load simulation of DOCSIS 3.1, digital and analog TV

      • Cable modem data traffic simulation in the upstream
        • Any combination of OFDMA, TDMA and CDMA signals
        • Trigger function for burst timing control

      • Signal interference and distortion simulation
        • Noise, impulsive noise and phase noise
        • Microreflections
        • AC hum
        • Uptilt and downtilt
        • Ingress simulation with superimposed interference signals

      Specifications in brief
      RF parameters
      Frequency rangedownstream47 MHz to 1218 MHz
      with R&S®CLGD-K3018 option47 MHz to 1794 MHz
      upstream5 MHz to 204 MHz
      Leveladjustable up to max. 62 dBmV
      Tiltadjustable up to ±15 dB (1 GHz)
      MERDOCSIS 3.1, f = 500 MHz, B = 192 MHztyp. > 53 dB
      2 × 192 MHz DOCSIS 3.1 and 24 × J.83/A/B/C and f < 600 MHz≥ 50 dB
      1 × J.83/A/B/Ctyp. > 45 dB
      Multichannel signal generationdownstreamup to 5 × DOCSIS 3.1 or
      up to 2 × DOCSIS 3.1 and 158 × QAM
      with R&S®CLGD-K3018 optionup to 8 × DOCSIS 3.1 or
      up to 4 × DOCSIS 3.1 and 158 × QAM
      upstreamup to 2 × DOCSIS 3.1 and 32 × DOCSIS 3.0
      Downstream modulation (R&S®CLGD-K200 option)
      DOCSIS 3.1bandwidthup to 192 MHz
      constellation16QAM to 4096QAM, overrange 8kQAM, 16kQAM
      FFT mode4k, 8k
      J.83/A/B/Cbandwidth6 MHz, 7 MHz, 8 MHz
      constellation64QAM, 256QAM
      Analog TVPAL, NTSC
      Upstream modulation (R&S®CLGD-K300 option)
      DOCSIS 3.1modulation modeOFDMA
      bandwidth6.4 MHz to 96 MHz
      DOCSIS 3.0modulation modeA-TDMA, S-CDMA
      bandwidth800 kHz, 1.6 MHz, 3.2 MHz, 6.4 MHz
      ARB waveform generator
      Bandwidth200 MHz
      Number of files played simultaneouslyup to 10 MHz bandwidth4
      10 MHz to 100 MHz bandwidth2
      100 MHz to 200 MHz bandwidth1
      Interference simulation (R&S®CLGD-K1050 option)
      NoiseAWGN, impulsive noise, phase noise
      Microreflectionsup to 5 reflections
      AC humamplitude modulation47 Hz to 200 Hz, 0% to 6%
      Narrowband interferenceAWGN up to 20 MHz bandwidth
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