R&S®SFD DOCSIS® Signal Generator

Single channel DOCSIS Signal Generator for DOCSIS3.1 downstream and upstream

Key Facts

  • Frequency range in downstream: 47 MHz to 1218 MHz (extendable to 1794 MHz)
  • Frequency range in upstream: 5 MHz to 204 MHz
  • DOCSIS3.1, DOCSIS3.0, J.83/A/B/C and analog TV
  • Up to 192 MHz signal bandwidth for DOCSIS3.1

Brief Description

The DOCSIS®3.1 standard is driving the trend in cable TV networks toward all-IP. The R&S®SFD generates a DOCSIS 3.1 OFDM broadband signal as well as the previous cable signals such as DOCSIS 3.0, digital and analog TV channels in the downstream. In the upstream, it generates a DOCSIS 3.1 or DOCSIS 3.0 signal.

Features

  • Signal generation in the downstream
  • Cable modem data traffic simulation in the upstream
  • Signal interference and distortion simulation
  • Powerful ARB generator

Specifications

RF parameters
Frequency range  
  with R&S®SFD-K3018 option
Frequency range in upstream:  
Level 192 MHz DOCSIS3.1

Key Facts

  • Frequency range in downstream: 47 MHz to 1218 MHz (extendable to 1794 MHz)
  • Frequency range in upstream: 5 MHz to 204 MHz
  • DOCSIS3.1, DOCSIS3.0, J.83/A/B/C and analog TV
  • Up to 192 MHz signal bandwidth for DOCSIS3.1
  • ARB generator bandwidth up to 200 MHz
  • Signal interference and distortion simulation

Brief Description

The DOCSIS®3.1 standard is driving the trend in cable TV networks toward all-IP. The R&S®SFD generates a DOCSIS 3.1 OFDM broadband signal as well as the previous cable signals such as DOCSIS 3.0, digital and analog TV channels in the downstream. In the upstream, it generates a DOCSIS 3.1 or DOCSIS 3.0 signal.

The R&S®SFD 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 47 MHz to 1794 MHz for DOCSIS 3.1 and 47 MHz to 1218 MHz for DOCSIS 3.0 and TV. Within this range, the R&S®SFD generates a DOCSIS 3.1 channel with up to 192 MHz bandwidth. The level, frequency, forward error correction (FEC) and constellation of this channel can be set. The R&S®SFD can alternatively produce a digital, QAM-modulated or analog TV signal. The DOCSIS 3.1 channel or digital TV channel is modulated in realtime. The data to be transmitted can be fed in via IP or internally generated by the R&S®SFD.

The upstream frequency range is 5 MHz to 204 MHz. Within this range, a DOCSIS 3.1 orthogonal frequency division multiple access (OFDMA) signal can be generated in realtime. A DOCSIS 3.0 TDMA or CDMA signal can be produced in realtime in the 5 MHz to 85 MHz range.

Features & Benefits

  • Signal generation in the downstream
    • Realtime modulation of DOCSIS3.1 and J.83/A/B/C
  • Cable modem data traffic simulation in the upstream
    • Realtime modulation of DOCSIS3.1 and DOCSIS3.0
    • All OFDMA, TDMA and CDMA signals
    • Trigger function for burst timing control
  • Signal interference and distortion simulation
    • Configurable bit error rate
    • White noise and phase noise
    • AC hum
    • Tilt
  • Powerful ARB generator
    • Up to 200 MHz bandwidth
    • 256 Mbyte memory

Specifications

RF parameters
Frequency range   47 MHz to 1218 MHz
  with R&S®SFD-K3018 option 47 MHz to 1794 MHz
Frequency range in upstream:   5 MHz to 204 MHz
Level 192 MHz DOCSIS3.1 59 dBmV
  J.83/A/B/C (DOCSIS3.0) 62 dBmV
MER 192 MHz DOCSIS3.1 typ. 57 dB
  J.83/A/B/C typ. 48 dB
Downstream modulation (R&S®SFD-K200 option)
DOCSIS3.1 bandwidth up to 192 MHz
  constellation 16QAM to 4096QAM, overrange 8kQAM, 16kQAM
  FFT mode 4k, 8k
J.83/A/B/C bandwidth 6 MHz, 7 MHz, 8 MHz
  constellation 64QAM, 256QAM
Analog TV   PAL, NTSC
Downstream modulation (R&S®SFD-K201 option)
Enhanced functions   insertion of timestamps in the downstream PLC, display of transmission data rate, R&S®FSW compatibility
Upstream modulation (R&S®SFD-K300 option)
DOCSIS3.1 modulation mode OFDM
  bandwidth 6.4 MHz to 96 MHz
DOCSIS3.0 modulation mode A-TDMA, S-CDMA
  bandwidth 800 kHz, 1.6 MHz, 3.2 MHz, 6.4 MHz
ARB waveform generator
Bandwidth   200 MHz
Memory   256 Mbyte
Sample rate   240 Msample/s
Waveform   DOCSIS3.1, DOCSIS3.0, J.83, PAL, NTSC, A-TDMA, S-CDMA
Waveform included in R&S®CLGD-K2 FM spectrum, additional PAL and SECAM signals
Signal interference (R&S®SFD-K1050 option)
Bit error rate   1 × 10–2 to 1 × 10–6
Noise   AWGN, phase noise
AC hum amplitude modulation 47 Hz to 200 Hz, 0% to 6%
Tilt DOCSIS3.1 ±15 dB/GHz
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