Satellite signal receiving apparatus

A satellite signal receiving apparatus comprising an outdoor unit, a channel selector and one transmission line connecting therebetween, wherein said channel selector comprises:

• a tuning means coupled via said one transmission line to said outdoor unit for extracting a transmission signal having a predetermined frequency from said transmission signal fed via said one transmission line from said outdoor unit and demodulating said extracted transmission signal;
• an operating means for designating said frequency of said transmission signal to be demodulated by said tuning means;
• a source voltage generating means for generating source voltage to be supplied to said outdoor unit via said one transmission line;
• a polarized radiation signal designating means for determining whether a polarized radiation signal is to be a vertically polarized radiation signal or a horizontally polarized radiation signal, said polarized radiation signal being converted in frequency by a frequency converting means;
• a pulse train superposing means for superposing a predetermined pulse train over said source voltage according to said polarized radiation signal designated by said polarized radiation signal designating means;
• and
• a source voltage output means for outputting said source voltage passed through said pulse train superposing means to said one transmission line, said outdoor unit receiving and extracting said source voltage and detecting said pulse train which switches said polarized radiation signal.

A satellite signal receiving apparatus comprising:

• an outdoor unit including;
• a receiving means for receiving vertically polarized radiation and horizontally polarized radiation, respectively, transmitted from an artificial satellite, and
• a frequency converting means for converting either one of said vertically polarized radiation and said horizontally polarized radiation output from said receiving means into a transmission signal having a predetermined frequency band and outputting said transmission signal to a transmission line;
• a channel selecting means including:
• a tuning means coupled via said transmission line to said outdoor unit for extracting said transmission signal having a predetermined frequency from said transmission signal fed via said transmission line from said outdoor unit and demodulating said extracted transmission signal,
• an operating means for designating said predetermined frequency of said transmission signal to be demodulated by said tuning means,
• wherein said channel selecting means further includes;
• a source voltage generating means for generating a source voltage to be supplied to said outdoor unit via said transmission line,
• a polarized radiation signal designating means for determining whether a polarized radiation signal is to be said vertically polarized radiation or said horizontally polarized radiation, said polarized radiation signal being converted in frequency by said frequency converting means,
• a pulse train superposing means for superposing a predetermined pulse train over said source voltage according to said polarized radiation signal designated by said polarized radiation signal designating means, and
• a source voltage output means for outputting said source voltage passed through said pulse train superposing means to said transmission line, said outdoor unit further includes:
• a source voltage extracting means for extracting said source voltage passed through said pulse train superposing means and received from said transmission line,
• a smoothing means for smoothing said source voltage extracted by said source voltage extracting means,
• a constant-voltage means for converting said source voltage smoothed by said smoothing means into a predetermined voltage and for supplying said predetermined voltage to each component of said outdoor unit,
• a pulse train detecting means for detecting a pulse train from said source voltage extracted by said source voltage extracting means, and
• a polarized radiation signal switch control means for switching said polarized radiation signal to be converted in frequency by said frequency converting means and output to said transmission line in accordance with said detecting by said pulse train detecting means.