HDO773 is a high performance directly modulated C-band DWDM transmitter

for forward path fibre optic links in CATV and FTTx networks. HDO773 is able to carry all kind of analog or/ and digital channel loading on the whole frequency band. HDO773 transmitter contains an electrical dispersion compensator that is important especially when analog channels are transmitted to longer distances. HDO773 is installed into a HDX installation frame and the transmitter is available on different optical wavelengths in accordance with the ITU wavelength grid. HDO773 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 HDO773 still offers the high performance and the widest variety of features.

  • ITU wavelengths
  • Electrical dispersion compensator provides a good CSO performance over longer transmission distances
  • Standardised input and test point levels
  • 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
  • Optional spectrum analyser function
  • 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
  • Local and remote software control of all adjustments
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