To: Terry Maloney who wrote (416560 ) 7/27/2011 8:58:47 PM From: S. maltophilia Read Replies (1) | Respond to HARPP is new to me, too, but I must have my paranoia either toned down or worn out.haarp.alaska.edu VHF low (2-6): 100 kW video analog; 45 kW digital (sliding scale varying with height) VHF high (7-13): 316 kW video analog; 160 kW digital (sliding scale varying with height) UHF all (14-69): 5 MW video analog; 1MW digital All Full power analog television station transmissions in the USA were terminated at midnight Eastern Daylight Time on June 12, 2009. [4] [5] Many broadcasters replaced their analog signal with their digital ATSC signal on the same transmission channel at that time. Analog audio power was limited to 22% of video. [6] For U.S. analog stations, the -TV suffix was required if there was a radio station with the same three- or four-letter callsign. Stations not required to use the -TV suffix could optionally request it if desired. All U.S. digital stations received a -DT suffix during the analog-to-digital transition. At analog shutdown, the FCC assigned each digital station the callsign its associated analog station had used. (with a -TV suffix if the analog station had one, without the -TV suffix if the analog station didn't have it) Stations could optionally choose to keep the -DT suffix. [7] Most stations did not keep the -DT suffix. [8] edit ] Full-power stations (Canada) Class A: UHF, 10 kW video/100m EHAAT Class B: UHF, 100 kW video/150m EHAAT Class C: UHF, 1000 kW video/300m EHAAT (?) Class D: UHF, more than 1000 kW/300m EHAAT Class R: VHF, 100 kW low-band (channels 2-6), 325 kW high-band. (channels 7-13) Class S: VHF, more than 100 kW low-band/325 kW high-band. en.wikipedia.org
