| A M Mp3, A M Music Lyrics
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A M biography, A M discography
Latin for "before noon"
Anno Mundi, a Calendar era counting from the creation of the world
Anno Martyrum, used in the Coptic calendar
In communications:
"Away message", see status message (IM)
"Above mentioned" in Internet slang
Airmail
AM broadcasting, radio broadcasting using Amplitude Modulation
In entertainment:
All Music, a music database
AM (ABC Radio), radio current affairs programme
A.French automobile
In the military:
Air Marshal, a military rank in the Royal Air Force and many Commonwealth air forces
Air Medal, a military decoration
Minesweeper (ship), U.For the song by Everclear, see AM Radio (song).AM broadcasting is the process of radio broadcasting using Amplitude Modulation.The great increase in the use of AM radio came the following decade.Dramas, comedy and all other forms of entertainment were produced, as well as broadcasts of news and music.US or Canada is authorized for such power levels.Medium wave and short wave radio signals act differently during daytime and nighttime.However, after sunset, changes in the ionosphere cause AM signals to travel by skywave, enabling AM radio stations to be heard much farther from their point of origin than is normal during the day.This phenomenon can be easily observed by scanning an AM radio dial at night.As a result, many broadcast stations are required as a condition of license to reduce their broadcasting power significantly (or use directional antennas) after sunset, or even to suspend broadcasting entirely during nighttime hours.Such stations are commonly referred to as daytimers.In the United States, some AM radio stations are granted clear channel status, meaning that they broadcast on frequencies with few other stations allocated, allowing an extended coverage area.Nowadays relatively few stations enjoy clear channel status.The hobby of listening to long distance signals is known as DX or DX'ing, from an old telegraph abbreviation for "distance".DXing the AM broadcast band, including the National Radio Club and International Radio Club of America.The allocation of these bands is governed by the ITU's Radio Regulations and, on the national level, by each country's telecommunications administration (the FCC in the U.Western Hemisphere, and 9 kHz channel spacing is generally used.Long wave is used for radio broadcasting in Europe, Africa, Oceania and parts of Asia (ITU regions 1 and 3).In the United States and Canada, Bermuda and U.ITU region 2 also authorizes the Extended AM broadcast band between 1610 kHz and 1710 kHz.This is the "AM radio" that most people are familiar with.MHz, divided into 15 broadcast bands.The mode of propagation for short wave is different (see high frequency).Frequencies between the broadcast bands are used for other forms of radio communication, and are not broadcast services intended for reception by the general public.Limitations of AM radio
Because of its susceptibility to atmospheric and electrical interference, AM broadcasting has attracted mostly talk radio and news programming, while music radio and public radio mostly shifted to FM broadcasting in the late 1960s and 1970s.Previously, in the UK during the 1980s, BBC Radio 4 (a largely speech channel) had an FM location, whereas BBC Radio 1, a music channel, was confined to AM broadcasts over much of the UK.The limitation on AM fidelity comes from current receiver design.Moreover, to fit more transmitters on the AM broadcast band, in the United States maximum transmitted audio bandwidth is limited to 10 kHz by an NRSC standard adopted by the FCC.AM radio signals can be severely disrupted in large urban centres by metal structures, tall buildings and sources of radio frequency interference (RFI) and electrical noise, such as electrical motors, fluorescent lights, or lightning.As a result, AM radio in many countries has lost its dominance as a music broadcasting service, and in many cities is now relegated to news, sports, religious and talk radio stations.AM, especially in areas where FM frequencies are in short supply or in thinly populated or mountainous areas where FM coverage is poor.Other distribution methods
Stereo transmissions are possible (see AM stereo), and hybrid digital broadcast systems are now being used around the world.In the United States, iBiquity's proprietary HD Radio has been adopted and approved by the FCC for medium wave transmissions, while Digital Radio Mondiale is a more open effort often used on the shortwave bands, and can be used alongside many AM broadcasts.Hz, in addition to stereo sound and text data.While FM radio can also be received by cable, AM radio generally cannot, although an AM station can be converted into an FM cable signal.In Canada, cable operators that offer FM cable services are required by the CRTC to distribute all locally available AM stations in this manner.The attraction is part of a vintage amateur radio specialty in the hobby, and it resembles old car collecting.Some amateurs listen on the big speaker of an antique floor console with shortwave bands such as those from Philco, GE, Crosley and Zenith.See also
Amplitude Modulation Signaling System, a digital system for adding low bitrate information to an AM broadcast signal.MW DXing, the hobby of receiving distant AM radio stations on the mediumwave band.D, a hybrid digital radio format for AM broadcasting
Lists of radio stations in North and Central America
Oldest radio station
AM Broadcasting from DXinginfo.This page was last modified 19:01, 15 January 2008.MB Shortcuts menu to the above
on the left."The data files used for this
query are updated each morning.AM Query to Dale Bickel,
dale.CDBS data fields, but include the values most
commonly sought by users.Only AM records with current engineering data will
be retrieved.Partial city names are acceptable, such as NEW, AN, BOS."Check this box, then
select a frequency.Facility ID number must be exact.Must enter Radius and Degrees Latitude
and Longitude, at a minimum.Please send comments via standard mail to the Federal Communications Commission, Consumer and Governmental Affairs Bureau, 445 12th Street, S.Time QuotesGet QuotesFinance SearchAmerican Greetings Corp.Data
Quotes delayed, except where indicated otherwise.More Financial Blogs for AM...Add AM Blogs to My Yahoo!PEG Ratio (5 yr expected):1.To learn more about Yahoo!Quotes delayed, except where indicated otherwise.Fundamental company data provided by Capital IQ.Quotes and other information supplied by independent providers identified on the Yahoo!Historical chart data and daily updates provided by Commodity Systems, Inc.Analyst estimates data provided by Thomson Financial Network.All data povided by Thomson Financial Network is based solely upon research information provided by third party analysts.ThomsonFN shall not be liable for any actions taken in reliance thereon.ARCHIVEABOUTEMAILTony Eastley presents AM Monday to Friday from 8:00am on ABC Local Radio and 7:10am on Radio National.It covers the stories each morning that the other current affairs teams follow for the rest of the day.Government meets today to review Indigenous intervention
Members of the Northern Territory's intervention task force will meet the Federal Indigenous Affairs Minister, Jenny Macklin in Canberra today to discuss the future of the program.EU travellers face tougher US flight security
Washington believes Europe is now a major source of terrorism prompting tougher security checks for people travelling between the US and the European Union.Russian relations threatened over 'police intimidation'
Diplomatic ties between London and Moscow are under pressure with claims by British officials in St.Experts warn of looming global food shortages
Farming and science experts are meeting in Melbourne to discuss food scarcity and rising prices which they say will further fuel demand for Australian products.Australian marsupial king of the lions
New research using computer simulations suggests a marsupial lion that roamed Australia during the Ice Age had a unique form of killing that gave it a distinct advantage over other large creatures.BHP could lift Rio share offer
Mining company Rio Tinto is showing a group of British financial journalists its iron ore operations in the Pilbara.The West Australian tour is part of the company's push to explain its opposition to a takeover by BHP Billiton.Podcasting (MP3) conditions of use.What is AM Statistical Software?We have taken great care to ensure that the AM product is easy to install and simple to use.However, you may still have questions or problems that you need answers to, and this is where you will find them.For the first time, AM offers statistical graphics.Right now, it produces bar charts, line charts, and the new Sectioned Density Plot.General Export on AM's main menu.As always, AM will remain free in future releases.Great
radio stories in the Features section.
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