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==Sub-channels==
==Sub-channels==
Digital television allows for sub-channels in addition to the main channel. For example, on the ION television network (formerly [[PAX television network]]), the digital signal from their broadcast stations includes the main channel, the [[Qubo]] cartoon channel, ION Life (a lifestyle, food, and exercise channel), and the Worship Channel. Thus, the digital broadcast signal from the local ION affiliate carries four channels instead of one. Other stations are doing likewise and carrying additional sub-channels, such as [[weather]]-only and [[movie]]-only programming, making the availablity and quality of digital television programming available free over the air potentially comparable to that of [[cable]] television.
Digital television allows for sub-channels in addition to the main channel. For example, on the ION television network (formerly [[PAX television network]]), the digital signal from their broadcast stations includes the main channel, the [[Qubo]] cartoon channel, ION Life (a lifestyle, food, and exercise channel), and the Worship Channel. Thus, the digital broadcast signal from the local ION affiliate carries four channels instead of one. Other stations are doing likewise and carrying additional sub-channels, such as [[weather]]-only and [[movie]]-only programming, making the availability and quality of digital television programming available free over the air potentially comparable to that of [[cable]] television.
==Effects of interference==
A common belief used to promote this previously unheard of and unproven technology is the idea that DTV is somehow magically immune to the notorious effects of electromagnetic interference, such as ghosting (duplicate images and outlines of objects appearing on the screen), static, audio noise, and loss of color. In reality, DTV, both satellite, digital cable, and digital terrestrial television face equally serious problems of their own.
==Effects of interference on digital terrestrial television==
{| class="wikitable"
|-
! Effect
! Cause
! Solution
|-
| Complete loss of signal
| Improper antenna position,
| row 1, cell 3
|-
| row 2, cell 1
| row 2, cell 2
| row 2, cell 3
|}
==References and notes==
==References and notes==
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