This is a list of broadcast station classes applicable in much of North America under international agreements between the United States, Canada and Mexico. The United States of America —commonly referred to as the Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. Effective radiated power (ERP) and height above average terrain (HAAT) are listed unless otherwise noted. In radio Telecommunications, effective radiated power or equivalent radiated power (ERP is a standardized theoretical measurement of radio frequency (RF Height above average terrain ( HAAT) (or less popularly EHAAT, Effective Height Above Average Terrain is used extensively in FM Radio and

All radio and television stations within 320 kilometers (about 200 miles) of the U.S.-Canada or U.S.-Mexico border must get approval by both the domestic and foreign agency. This article is about radio broadcasting for other uses see Radio (disambiguation. A television station is a type of broadcast station that broadcasts both audio and Video to Television receivers in a particular area The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand A mile is a unit of Length, usually used to measure Distance, in a number of different systems including Imperial units United States The Canada – United States border is the international Border between Canada and the United States. These are Industry Canada/Canadian Radio-television and Telecommunications Commission (CRTC) in Canada, the Federal Communications Commission (FCC) in the U. Industry Canada is the department of the Government of Canada with responsibility for regional economic development investment and innovation/ Research and development CRTC may also stand for Cathode Ray Tube Controller. Canadian Radio-television and Telecommunications Commission ( CRTC, in French Conseil S. , and the Secretaría de Comunicaciones y Transportes (SCT) in Mexico.

AM

• A (former I): clear channels, 10 kW to 50 kW day and night
• B (former II and III): 250 W to 50 kW (to 10 kW on 1620 kHz to 1710 kHz)
  • D (former II-D, II-S, III-S): daytime 250 W to 50 kW, nighttime under 250 W or off-air, field strength up to 140 mV/m² at 1 km, no new stations except downgraded B
• C (former IV): 250 W to 1 kW (also grandfathered 100 W)
• TIS/HAR: Travelers' Information Stations up to 10 W transmitter output power
• Unlicensed broadcasting (see low-power broadcasting): 100 mW, no license needed (US only?), may be measured at edge of campus for school stations

Notes

• In the Western Hemisphere (ITU region 2), medium wave AM broadcasts are on channels spaced 10 kHz apart from 530 kHz to 1710 kHz, with certain classes restricted to subsets of the available frequencies. The term is also used in the context of T1 A clear channel, in its general sense is a communications channel, such as a radio In Physics, the field strength of a field is the magnitude of its vector value In Telecommunications, particularly in Radio, signal strength refers to the magnitude of the Electric field at a reference point that is a significant distance A grandfather clause is a term used in US English for an exception that allows an old rule to continue to apply to some existing situations when a new rule will apply to all future situations Highway advisory radio ( HAR) sometimes also called travelers' information stations ( TIS) are licensed low-power AM Radio stations Low-power broadcasting is the concept of Broadcasting at very low power and low cost to a small community area The Western Hemisphere, also Western hemisphere or western hemisphere, is a geographical term for the half of the Earth that lies West The International Telecommunication Union (ITU in its International Radio Regulations, divides the world into three ITU regions for the purposes of managing the Medium Wave (MW is a part of the Medium frequency (MF radio band used mainly for AM broadcasting.
• Class A stations can be found only on the frequencies of 540 kHz, 640 to 780 kHz, 800 to 900 kHz, 940 kHz, 1000 to 1140 kHz, 1160 to 1220 kHz, and 1500 to 1580 kHz.
• While Class A stations can only operate at a maximum of 50,000 watts day and night, from 1934 to 1939, Cincinnati's class A station 700 WLW broadcast at 500,000 watts under an experimental license. WLW is a Clear channel radio station located in Cincinnati Ohio, run by Clear Channel Communications and broadcasting on 700 kHz AM. The signal was able to cover the entire continent and reach overseas, but was soon shut down due to complaints from competitors and stations in far away cities where the 700 kHz frequency was bleeding into nearby stations on the dial.
• Class B and D stations can be found on any frequencies from 540 kHz to 1700 kHz except where frequencies have been reserved for Class C stations.
• Class C stations can be found in the lower 48 US states on the frequencies of 1230 kHz, 1240 kHz, 1340 kHz, 1400 kHz, 1450 kHz, and 1490 kHz. Other countries may use other frequencies for their Class C stations.
• TIS stations can be found on any frequency from 530 kHz to 1700 kHz in the US, but may only carry non-commercial messages without music.
• Low-power AM stations located on a school campus are allowed to be more powerful, so long as their signal strength does not exceed roughly 14 to 45 µV/m² (depending on frequency) at a distance of 30 meters (98. Low-power broadcasting is the concept of Broadcasting at very low power and low cost to a small community area A school (from Greek σχολεῖον - scholeion) is an Institution designed to allow and encourage Students (or "pupils" A campus is traditionally the land on which a College or University and related institutional buildings are situated In Telecommunications, particularly in Radio, signal strength refers to the magnitude of the Electric field at a reference point that is a significant distance 4 ft) from campus.
• AM classes were previously assigned Roman numerals from I to IV in the US, with subclasses indicated by a letter suffix. Roman numerals are a Numeral system originating in ancient Rome, adapted from Etruscan numerals. In Grammar, a suffix (also postfix, ending) is an Affix which is placed at the end of a word Current class A is equivalent to the old class I; class B is the old classes II and III, with class D being the II-D, II-S, and III-S subclasses; and class C is the old class IV.

See also: North American Radio Broadcasting Agreement (NARBA)

FM

• C: 100 kW, 300 m to 600 m, 91. The North American Radio Broadcasting Agreement, usually referred to as NARBA, is a treaty made in 1941 between the United States Canada Mexico Cuba the Dominican 8 km
• C0: 100 kW, 300 m to 450 m, 83. 4 km
• C1: up to 100 kW, under 300 m, 72. 3 km
• C2: up to 50 kW, up to 150 m, 52. 2 km
• C3: up to 25 kW, up to 100 m, 39. 1 km
• B: up to 50 kW, up to 150 m, 65. 1 km
• B1: up to 25 kW, up to 100 m, 44. 7 km
• A: 100 W to 6 kW, up to 100 m, 28. 3 km
  • AA (Mexico): up to 3 kW, the former limit for A
• D: up to 250 W ERP, except U. S. non-translators to 10 W TPO
  • L1 (U. In Radio transmission, transmitter power output ( TPO) is the actual amount of power (in Watts of Radio frequency (RF energy S. , also LP100): 50 W to 100 W ERP, up to 30 m, 5. 6 km
  • L2 (U. S. , also LP10): 1W to 10 W ERP, up to 30 m, 3. 2 km
• Unlicensed: 250 µV/m² at 3 m in U. S. , 100µV/m² at 30 m in Canada

Notes:

• Canada protects all radio stations out to a signal strength of 0. This article is about radio broadcasting for other uses see Radio (disambiguation. In Telecommunications, particularly in Radio, signal strength refers to the magnitude of the Electric field at a reference point that is a significant distance 5 mV/m², whereas only commercial B stations in the U. In Telecommunications, particularly in Radio, signal strength refers to the magnitude of the Electric field at a reference point that is a significant distance S. are. Commercial B1 in the U. S. is 0. 7 mV/m², and all other stations are 1. 0 mV/m². Noncommercial-band stations (88. 1 to 91. 9) are not afforded this protection, and are treated as C3 and C2 even when they are B1 or B. C3 and C2 may also be reported internationally as B1 and B, respectively.
• Class C0 is for former C stations, demoted at request of another station which needs the downgrade to accommodate its own facilities.
• In practice, many stations are above the maximum HAAT for a particular class, and correspondingly must downgrade their power to remain below the reference distance. Conversely, they may not increase power if they are below maximum HAAT.
• All class D (including L1 and L2 LPFM and translator) stations are secondary in the U. Low-power broadcasting is the concept of Broadcasting at very low power and low cost to a small community area S. , and can be bumped or forced off-air completely, even if they are not just a repeater and are the only station a licensee has.
• The United States is divided into separate regions that have different restrictions for FM stations. Zone I (much of the U.S. Northeast and Midwest) and I-A (most of California, plus Puerto Rico) is limited to classes B and B1, while Zone II (everything else) has only the C classes. The Northeast is a region of the United States. As defined by the U California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Puerto Rico (ˌpwertoˈriko officially the Commonwealth of Puerto Rico ("Estado Libre Asociado de Puerto Rico" {{lang-en|"Associated Free State of Puerto Rico"}} All areas have the same classes for A and D.
• Power and height restrictions were put in place in 1962. Year 1962 ( MCMLXII) was a Common year starting on Monday (the link is to a full 1962 calendar of the Gregorian calendar. A number of previously-existing stations were grandfathered in, such as KRUZ in Santa Barbara, California and WMC-FM in Memphis, Tennessee. A grandfather clause is a term used in US English for an exception that allows an old rule to continue to apply to some existing situations when a new rule will apply to all future situations KRUZ (975 FM, "KRUZ @ 975" is a commercial Modern adult contemporary music Radio station in Santa Barbara California. Santa Barbara is a city in Santa Barbara County California, United States. WMC-FM (997 FM, known as "FM 100" is a " Hot AC " Radio station serving the market of Memphis Tennessee. Memphis is a City in the southwest corner of Tennessee, and the County seat of Shelby County.

FM zones

FM broadcast zones in the U. S.

Zone I in the U. S. includes all of Connecticut, the District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, New Jersey, Ohio, Pennsylvania, Rhode Island, and West Virginia. Connecticut ( is a state located in the New England region of the northeastern United States of America. Washington DC ( formally the District of Columbia and commonly referred to as Washington, the District, or simply D Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. The State of Illinois ( roughly ill-i-NOY is a state of the United States of America, the 21st to be admitted to the Union. The State of Indiana ( was the 19th US state admitted into the union The Commonwealth of Massachusetts ( is a state located in the New England region of the northeastern United States. New Jersey ( is a state in the Mid-Atlantic and Northeastern regions of the United States. Ohio ( is a Midwestern state of the United States. As part of the Great Lakes region, Ohio has long been a cultural and geographical crossroads The Commonwealth of Pennsylvania ( often colloquially referred to as PA (its abbreviation by natives and Northeasterners is a state located in the Northeastern Rhode Island ( officially named the State of Rhode Island and Providence Plantations, is a state in the New England region of the United States West Virginia ( is a state in the Appalachian Upland South, and Mid-Atlantic regions of the United States, bordered by It also includes the areas south of latitude 43. Latitude, usually denoted symbolically by the Greek letter phi ( Φ) gives the location of a place on Earth (or other planetary body north or south of the 5°N in Michigan, New Hampshire, New York, and Vermont; as well as coastal Maine, southeastern Wisconsin, and northern and eastern Virginia. Michigan ( is a Midwestern state of the United States of America. New Hampshire ( is a state in the New England region of the northeastern United States of America. New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous Vermont ( is a state in the New England region of the northeastern United States of America. The State of Maine ( is a state in the New England region of the northeastern United States of America, bordering the Atlantic Ocean Wisconsin ( or wɪˈskɑnsɨn (French Ouisconsin) is one of the fifty United States of America, located in the north central part of the United States The Commonwealth of Virginia ( is an American state

Zone I-A includes California south of 40°N, as well as Puerto Rico and the U.S. Virgin Islands. California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Puerto Rico (ˌpwertoˈriko officially the Commonwealth of Puerto Rico ("Estado Libre Asociado de Puerto Rico" {{lang-en|"Associated Free State of Puerto Rico"}} The United States Virgin Islands is a group of Islands in the Caribbean that are an Insular area of the United States.

TV

Full-Service Stations

Full-Service Stations Suffix: -TV or -DT, -DS for temporary Digital permits ("special temporary authority"):

• VHF low (2-6): 100 kW video, 10 kW audio; 20 kW digital
• VHF high (7-13): 316 kW video, 31. 6 kW audio; 63. 2 kW digital
• UHF all (14-69): 5 MW video, 500 kW audio; 1MW digital

Notes:

• Power level limitations are not firmly enforced in Canada, and Industry Canada has been known to license stations for power levels much higher than the generally-accepted limits. Industry Canada is the department of the Government of Canada with responsibility for regional economic development investment and innovation/ Research and development For example, CFRN-TV in Edmonton, Alberta operates on Channel 3 at over 600 kW. CFRN-TV (also known as CTV Edmonton) is a Canadian television station broadcasting in Edmonton, Alberta. Edmonton (ˈɛdmɨntɨn is the capital of the Canadian province of Alberta. Alberta (ælˈbɝtə is one of Canada's prairie provinces. It became a province on September 1 1905
• Digital television stations have the suffix of -DT (though some early on in the adaptation to digital television had the suffix of -HD. This has since been discontinued).

Class A

Main article: Class A television service

Class-A stations (U. Class A television service is a system for regulating some low power television ( LPTV) stations in the United States set up by the FCC as a result of the S. ) (suffix: -CA or -DC for Digital Class-A):

• VHF all (2-13): 3 kW video; 300 W digital
• UHF all (14-69): 150 kW video; 15 kW digital

The Class-A Television Station service Category was created in 2000 by the FCC to allocate and protect some low-power affiliates. Class-A stations are still low-power, but are protected from interference and from having to move should a full-service station request that channel. [1]

Low-Power TV

LPTV (secondary) (suffix: -LP, -TX, for translators, or -DL / -LD, for low-power digital stations):

• VHF all (2-13): 3 kW video; 300 W digital
• UHF all (14-69): 150 kW video; 15 kW digital
• Experimental
• Unlicensed: not allowed except for medical telemetry, and certain wireless microphones

The LPTV (Low-Power Television) service Category was created in 1982 by the FCC to allocate channels for smaller, local stations, and community channels, such as public access stations. Low-power broadcasting is the concept of Broadcasting at very low power and low cost to a small community area Medicine is the art and science of healing It encompasses a range of Health care practices evolved to maintain and restore Human Health by the Telemetry (synonymous with Telematics) is a Technology that allows the remote measurement and reporting of Information of interest to the system designer Wireless communication is the transfer of information over a distance without the use of electrical conductors or " Wires quot Public-access television in the United States is a form of Citizen media, similar to Canada's community channels Australia's community television LPTV stations that meet additional requirements such as Children's "E/I" core programming and Emergency Alert System broadcasting capabilities can qualify for a Class A (-CA) license. e/i was the second magazine founded published and edited by electronic music journalist Darren Bergstein following the 1980s to 1990's run of i/e magazine The Emergency Alert System (EAS is a national warning system in the U Class A television service is a system for regulating some low power television ( LPTV) stations in the United States set up by the FCC as a result of the [2]

Broadcast translators, boosters, and other LPTV stations are secondary, unless they have upgraded to class A. Low-power broadcasting is the concept of Broadcasting at very low power and low cost to a small community area Class A is still considered LPTV with respect to stations in Canada and Mexico. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America.

The United States Federal Communications Commission lists the following services on their website for television broadcasting:

See also

• North American call sign - How call signs and classes are used in North America
• ITU prefix - How callsigns and classes are used worldwide
• Low-power broadcasting
• Class A television service

External links

• FCC AM classes
• FCC FM classes
• FCC LPTV Facts
• FCC LPTV classes
• FCC Class-A TV Information
• FCC FM Broadcast Zone Lookup by Coordinate