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The Federal Communications Commission (FCC) hosts an interactive mapping service designed to help consumers evaluate their local broadcast television reception.
: Stations broadcast on a physical Radio Frequency (RF) channel , but your television maps it to a familiar Virtual Channel (e.g., a station broadcasting physically on RF Channel 7 might display as Channel 2.1 on your screen). Knowing the RF channel tells you what physical frequency band your antenna needs to catch.
Armed with this new intelligence, Arthur realized his mistake: his indoor antenna was facing a brick wall toward the south. According to the DTV Gov Maps dtv gov maps
Run by the Federal Communications Commission (FCC), these interactive maps show predicted coverage areas for full-power digital TV stations across the U.S. Just enter your address, and the tool lists:
: Every time you move your antenna, you must use your TV's "Settings" or "Setup" menu to run a new Channel Scan to find the available signals. Consider Obstacles Armed with this new intelligence, Arthur realized his
: Broadcasters occasionally change frequencies; if you lose a channel, perform a "Channel Search" or "Auto Program" through your TV's menu. Recommended Tools
If you move your antenna, you must tell your TV to search for signals again. if you lose a channel
Antenna for Local Stations - Amazon Digital and Device Forum
For DTV, the time variability term is critical. The FCC uses the condition for digital (unlike analog's 90%). The signal level at receiving antenna ($E$) is: $$E = EIRP + G_r - L_total + F(\nu)$$ Where $F(\nu)$ is the Fresnel-Kirchhoff diffraction parameter. The digital threshold is defined such that $E \geq E_min$ for $Q$% of locations.
DTV Gov Maps: The Complete Guide to Free Over-the-Air Television