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HDO774 is a wavelength tuneable and externally modulated C-band DWDM transmitter

for forward path fibre optic links in CATV and FTTx networks. The transmitter has an extended frequency range to fulfil DOCSIS 3.1 requirements. HDO774 has been optimised for QAM transmission and it can carry more than 100 QAM channels i.e. a full channel load up to 1.2 GHz. HDO774 can be also loaded with a limited amount of analog TV channels together with QAM channels. The module is installed into HDX installation frame. The transmitter has two equal input sections with level and slope adjustments to support broadcast and narrowcast signal distribution. The RF isolation between the input branches is high minimising the leakage of narrowcast signals into unwanted narrowcast node segments. The power consumption is low but HDO774 still offers the high performance and the widest variety of features.

  • DOCSIS 3.1 compatible
  • User settable ITU channels
  • External modulation enables different link spans with one transmitter (more than one receiver)
  • External modulation doesn’t require dispersion compensation
  • Standardised input and test point levels
  • Low power consumption and high performance
  • Two inputs with level adjustments
  • Equaliser in both inputs
  • High isolation between inputs
  • Unused input can be switched off for power saving and noise reduction
  • Integrated input amplifiers and laser driver amplifiers
  • Automatic power control providing constant total OMI as standard feature
  • Optional integrated xWDM filter to combine forward and return paths into one fibre or to combine various forward wavelengths into one fibre
  • Fibre connectors can be located at the rear or at the front panel
  • Small form factor family, 2 RU height
  • Local and remote software control of all adjustments
  • Forced cooling through the unit
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