About the session
This presentation describes a technique for the distribution of DVB-S signals over a passive optical fibre network using readily available optical components. To enable this, a cost-effective frequency stacking scheme has been developed which allows a laser, built into the LNB, to transmit the full 4 GHz bandwidth broadcast from the satellite over a passive optical network. At the receiver, the signals are de-stacked and presented to the set top box in the usual format. The optical fibre cables used have a cross-section an order of magnitude smaller than the coaxial ones traditionally employed in such distribution systems, and this considerably reduces installation costs and time. In addition, this approach provides a completely passive distribution system that is immune to EMI, very simple to design, requires no earth bonding and is capable of carrying signals over distances of over 10 km. Different variants of the system have been developed which are capable of servicing anywhere between the 32 outlets required for the small MDU market, up to and in excess of 15,000 outlets to allow housing estates and small towns to be covered.
