Single-LNB satellite data receiver

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention eliminates the cost and inconvenience of upgrading a single-LNB and installing a second coaxial cable from the ODU to indoor equipment.
As such, it makes possible a genuinely end user installable satellite data receiver.
FIG.
5 illustrates the home system 500 in one embodiment of the present invention.
The home system 500 includes an ODU 110, similar to the ODU 11 illustrated in FIG.
1, including an antenna mount 112, parabolic reflector 114, an FH 116, and a single-LNB 118.
The home system 500 also includes a coaxial cable 120, set top box 130, a television 140, and a satellite data receiver 150.
The home system 500 also includes an L-band splitter 502.
The L-band signal splitter 502 is used to give the satellite data receiver 150 access to both the received L-band signal from the single-LNB 118 as well as the signals from the set-top box 130 selecting the polarization forwarded by the single-LNB 118.
The data services are simultaneously transmitted on both polarizations.
Typically in a DTH satellite system, there are multiple digital carriers on each polarization.
The digital data services are located within one digital carrier on one polarization and in another digital carrier on the other polarization.
The data services are multiplexed into their carriers along with other services (digital video, audio, etc.
).
The receive parameters of the digital carrier are specific to the carrier's polarization.
The satellite data receiver 150, in the preferred embodiment, monitors the polarization control signals from the set-top box 130.
The satellite data receiver 150 tunes to the receive parameters appropriate to the polarization set by the set-top box 130 and thus appropriate for the L-band signals passed to the satellite data receiver 150.
As the end user changes the television channel, which often results in a change of polarization, the satellite data receiver 150 retunes and thus able to receive data services regardless of the polarization selected by the set-top box 130