This is accomplished by feedback from the control device, such as a digital-to-analog converter box, telling the smart antenna when the signal is stronger or weaker.
Analog televisions generally give instant feedback as the signal gets better or worse as you move the antenna.
Digital television antennas can be difficult to aim correctly because of the cliff effect and because of delays in decoding and displaying the signal.
This revision was first approved by the Consumer Electronics Association R4 Video Systems Committee on 6 June 2007 and ANSI public review closed on 1 October 2007.
After the above rigorous, seven year standardization process by the Consumer Electronics Association leading up to the deployment of ATSC digital television in the United States on June 11, 2009, two smart antenna models were brought to market: And two models are causing consumer confusion:
The United States National Telecommunications and Information Administration (NTIA) ran a coupon-eligible converter box (CECB) subsidy program for the ATSC conversion, but did not subsidize the purchase of a smart antenna to mitigate the cliff effect of digital television, and many CECBs do not support smart antennas.