Receiver having a preset tuner

A receiver for conducting searches within first frequency ranges with respect to center frequencies of each channel to register received data into a memory and counting the number of receivable channels, thereby determining whether the channels are within a terrestrial-wave television broadcast channel plan or within a CATV broadcast channel plan, comprising;

• first frequency setting means for setting filtering second frequency ranges more narrowly than and within the first frequency ranges;
• second frequency setting means for setting filtering third frequency ranges of approximately ±200 kHz about second center frequencies frequently shifted +2 MHz from an associated first center frequency when counting the number of receivable channels of a CATV broadcast in a UHF band overlapping with a television channel outside of said third frequency ranges;
• and
• determining means for determining whether the channels are within a terrestrial-wave television broadcast or within a CATV broadcast by counting the number of received channels filtered by said first frequency setting means and said second frequency setting means.

A method for determining whether channels are within a terrestrial-wave television broadcast channel plan or within a CATV broadcast channel plan by searching in first frequency ranges with respect to first center frequencies of each channel and counting the number of receivable channels, comprising the steps of:

• (a) setting filtered second frequency ranges more narrowly than and within the first frequency ranges;
• (b) setting filtered third frequency ranges of approximately ±200 kHz about second center frequencies frequency-shifted +2 MHz from an associated first center frequency when counting the number of receivable channels of a CATV broadcast in a UHF band overlapped with a television channel outside of said third frequency ranges;
• and
• (c) counting the number of reception channels filtered in the second frequency ranges and outside the third frequency ranges and determining whether they are within a terrestrial-wave television broadcast or within a CATV broadcast.

A receiver for determining whether channels are within a terrestrial-wave television broadcast channel plan or within a CATV broadcast plan by searching first frequency ranges with respect to first center frequencies of each channel and counting the number of receivable channels,

• said receiver comprising a computer, wherein said computer is programmed to execute the steps of:
• (a) setting filtered second frequency ranges more narrowly than and within the first frequency ranges;
• (b) setting filtered third frequency ranges of approximately ±200 kHz about second center frequencies frequency shifted +2 MHz from an associated first center frequency when counting the number of receivable channels of a CATV broadcast in a UHF band overlapped with a television channel outside of said third frequency ranges;
• and
• (c) counting the number of reception channels filtered in the second frequency ranges and outside the third frequency ranges and determining whether they are within a terrestrial-wave television broadcast or within a CATV broadcast.