Changes

In addition, being below average terrain, underground, or on the opposite side of a large bank of mountains and/or hills, such as areas east of [[Los Angeles]] have been known to prevent the reliable reception of over the air DTV entirely without a more substantial and costly rooftop tower antenna setup. In lower signal strength areas, indoor antennas don't as often provide satisfactory results (more than three or so channels). Analog signals fade and degrade much more gradually than DTV. With DTV, you either get perfect reception, acceptably good reception, or none at all.

In addition, being below average terrain, underground, or on the opposite side of a large bank of mountains and/or hills, such as areas east of [[Los Angeles]] have been known to prevent the reliable reception of over the air DTV entirely without a more substantial and costly rooftop tower antenna setup. In lower signal strength areas, indoor antennas don't as often provide satisfactory results (more than three or so channels). Analog signals fade and degrade much more gradually than DTV. With DTV, you either get perfect reception, acceptably good reception, or none at all.

== Frequencies ==

== Frequencies ==

Since the mandated government DTV transitions from 2009 to 2011 in the [[United States]] and [[Canada]], the actual channels that TV stations broadcast over the air has been almost exclusively [[UHF]] (ultra high frequency]] channels. Most TV stations broadcasting on channels 2 to 12 are only using those numbers as their [[virtual channel]]s. In other words; VHF [[dipole antenna]]s (rabbit ears) will likely receive extremely limited channels. This is because the frequencies that actually carry the data are located on the UHF spectrum, which have always had extremely limited compatibility with VHF dipole antennae. VHF frequencies are in the process of being auctioned off by the [[Federal Communications Commission|FCC]] to expand [[mobile phone]], [[two way radio]] or civil defense communication availabilities.

Since the mandated government DTV transitions from 2009 to 2011 in the [[United States]] and [[Canada]], the actual channels that TV stations broadcast over the air has been almost exclusively [[UHF]] (ultra high frequency} channels. Most TV stations broadcasting on channels 2 to 12 are only using those numbers as their [[virtual channel]]s. In other words; VHF [[dipole antenna]]s (rabbit ears) will likely receive extremely limited channels. This is because the frequencies that actually carry the data are located on the UHF spectrum, which have always had extremely limited compatibility with VHF dipole antennae. VHF frequencies are in the process of being auctioned off by the [[Federal Communications Commission|FCC]] to expand [[mobile phone]], [[two way radio]] or civil defense communication availabilities.

 

==References and notes==

==References and notes==

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