State of the art in satellite fibre optics transmission
TOFsat is the scalable system for reception and passthrough transmission of satellite and terrestrial broadcast services distributed over a Fibre Optic (FO) network, to a virtually unlimited number of homes.
It is intended to be used in multi-dwellings or multiple service FO networks.
Fibre cabling has some significant advantages compared to coax cabling in general:
Higher bandwidth — a 3mm fibre cable substitutes 5x7mm coax drop cables for transmission of the full bandwidth for one Sat position and the terrestrial signals
Allows enlarged cabling distances because of the low attenuation of a fibre cable – about 0.35dB per 1 km
Prevention of electromagnetic ingress noise from LTE mobile services, for example, and disturbance from DC potential and transient currents because of the natural galvanic isolation of fibre cables
Reception of the vertical and horizontal polarised frequency ranges of a satellite position, plus terrestrial FM, DAB and DTT bands over one mutual fibre line
Optional use of different LNBs: Standard wideband LNB, K-band LNB or dCSS LNBs for operator-specific satellite programme bouquets
Enlargement of the FO networks by active FO Repeaters or EDFAs
TOFsat is highly competitive because it uses frequency stacking and de-stacking for the Sat-IF-High, -Low and TER bands using specific ASIC chips. Thus only one laser transmitter and one optical receiver is sufficient for one entire Sat position and terrestrial transmission. (Comparing frequently-used wavelengths multiplexing in alternative systems needs 3 laser transmitters and 3 optical receivers in the re-converter for the same constellation. This increases the cost on the reception side, especially if large numbers of re-converters are connected.)
FO networks require less maintenance effort, and also less power consumption.
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