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87-417: A major feature of the agreement was the division of stations into three main classifications: Class A, normally limited to 100 kilowatts (kW) daytime and 50 kW at night; Class B, limited to 50 kW, and Class C, limited to a nighttime power of 1 kW. Individual nations were also authorized to make further refinements based on their particular circumstances. This broadcasting -related article

174-424: A cable converter box with decoding equipment in homes , the latter also enables subscription -based channels, pay-tv and pay-per-view services. In his essay, John Durham Peters wrote that communication is a tool used for dissemination. Peters stated, " Dissemination is a lens—sometimes a usefully distorting one—that helps us tackle basic issues such as interaction, presence, and space and time ... on

261-482: A dish antenna . The term broadcast television can refer to the television programs of such networks. The sequencing of content in a broadcast is called a schedule . As with all technological endeavors, a number of technical terms and slang have developed. A list of these terms can be found at List of broadcasting terms . Television and radio programs are distributed through radio broadcasting or cable , often both simultaneously. By coding signals and having

348-463: A line of sight path, limiting its range to the visual horizon like existing forms of visual signalling. Hertz's death in 1894 brought published reviews of his earlier discoveries including a demonstration on the transmission and detection of radio waves by the British physicist Oliver Lodge and an article about Hertz's work by Augusto Righi . Righi's article renewed Marconi's interest in developing

435-492: A child and did not go on to formal higher education. Instead, he learned chemistry, mathematics, and physics at home from a series of private tutors hired by his parents. His family hired additional tutors for Marconi in the winter when they would leave Bologna for the warmer climate of Tuscany or Florence . Marconi noted an important mentor was professor Vincenzo Rosa, a high school physics teacher in Livorno . Rosa taught

522-498: A distance of about 6 kilometres (3.7 mi) across Salisbury Plain . On 13 May 1897, Marconi sent the first ever wireless communication over the open sea – a message was transmitted over the Bristol Channel from Flat Holm Island to Lavernock Point near Cardiff , a distance of 6 kilometres (3.7 mi). The message read "Are you ready". The transmitting equipment was almost immediately relocated to Brean Down Fort on

609-610: A member of the Fascist Grand Council . Marconi was an apologist for fascist ideology and actions such as the Italian invasion of Ethiopia in the Second Italo-Abyssinian War . In his lecture he stated: "I reclaim the honour of being the first fascist in the field of radiotelegraphy, the first who acknowledged the utility of joining the electric rays in a bundle, as Mussolini was the first in

696-638: A patent on 2 June 1896. British Patent number 12039 titled "Improvements in Transmitting Electrical impulses and Signals, and in Apparatus therefor", which became the first patent for a communication system based on radio waves. Marconi made the first demonstration of his system for the British government in July 1896. A further series of demonstrations for the British followed, and, by March 1897, Marconi had transmitted Morse code signals over

783-497: A patent was obtained. He also encouraged Marconi to come to Britain, where he believed it would be easier to find the necessary funds to convert his experiments into practical use. Finding little interest or appreciation for his work in Italy, Marconi travelled to London in early 1896 at the age of 21, accompanied by his mother, to seek support for his work. (He spoke fluent English in addition to Italian.) Marconi arrived at Dover , and

870-435: A radio transmitter and receiver to his mother, a set-up that made a bell ring on the other side of the room by pushing a telegraphic button on a bench. Supported by his father, Marconi continued to read through the literature and picked up on the ideas of physicists who were experimenting with radio waves. He developed devices, such as portable transmitters and receiver systems, that could work over long distances, turning what

957-514: A reporter from The New York Times to talk with Bride, the surviving operator. After this incident, Marconi gained popularity and became more recognised for his contributions to the field of radio and wireless technology. On 18 June 1912, Marconi gave evidence to the Court of Inquiry into the loss of Titanic regarding the marine telegraphy's functions and the procedures for emergencies at sea. Britain's Postmaster-General summed up, referring to

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1044-473: A reputation for being technically conservative, in particular by continuing to use inefficient spark-transmitter technology, which could be used only for radio-telegraph operations, long after it was apparent that the future of radio communication lay with continuous-wave transmissions which were more efficient and could be used for audio transmissions. Somewhat belatedly, the company did begin significant work with continuous-wave equipment beginning in 1915, after

1131-822: A series of tests at La Spezia , in his home country, for the Italian government. A test for Lloyd's between The Marine Hotel in Ballycastle and Rathlin Island , both in County Antrim in Ulster , Ireland , was conducted on 6 July 1898 by George Kemp and Edward Edwin Glanville . A transmission across the English Channel was accomplished on 27 March 1899, from Wimereux , France to South Foreland Lighthouse , England. Marconi set up an experimental base at

1218-634: A signal on behalf of the merchant vessel Elbe which had run aground on Goodwin Sands . The message was received by the radio operator of the South Foreland lighthouse, who summoned the aid of the Ramsgate lifeboat. In the autumn of 1899, his first demonstration in the United States took place. Marconi had sailed to the U.S. at the invitation of The New York Herald newspaper to cover

1305-442: A signal that will reach the target audience . Broadcasters typically arrange audiences into entire assemblies. In terms of media broadcasting, a radio show can gather a large number of followers who tune in every day to specifically listen to that specific disc jockey . The disc jockey follows the script for their radio show and just talks into the microphone . They do not expect immediate feedback from any listeners. The message

1392-722: A single station or television station , it is sent through the studio/transmitter link to the transmitter and hence from the television antenna located on the radio masts and towers out to the world. Programming may also come through a communications satellite , played either live or recorded for later transmission. Networks of stations may simulcast the same programming at the same time, originally via microwave link, now usually by satellite. Distribution to stations or networks may also be through physical media, such as magnetic tape , compact disc (CD), DVD , and sometimes other formats. Usually these are included in another broadcast, such as when electronic news gathering (ENG) returns

1479-524: A son, Giulio, 2nd Marchese Marconi (1910–1971). In 1913, the Marconi family returned to Italy and became part of Rome society. Beatrice served as a lady-in-waiting to Queen Elena . At Marconi's request, his marriage to Beatrice was annulled on 27 April 1927, so he could remarry. Marconi and Beatrice had divorced on 12 February 1924 in the free city of Fiume ( Rijeka ). Marconi went on to marry Maria Cristina Bezzi-Scali (2 April 1900 – 15 July 1994),

1566-476: A story to the station for inclusion on a news programme . The final leg of broadcast distribution is how the signal gets to the listener or viewer. It may come over the air as with a radio station or television station to an antenna and radio receiver , or may come through cable television or cable radio (or wireless cable ) via the station or directly from a network. The Internet may also bring either internet radio or streaming media television to

1653-596: A transmission from the Marconi station in Glace Bay , Nova Scotia, Canada, became the world's first radio message to cross the Atlantic from North America. In 1901, Marconi built a station near South Wellfleet, Massachusetts , that sent a message of greetings on 18 January 1903 from United States President Theodore Roosevelt to King Edward VII of the United Kingdom. However, consistent transatlantic signalling

1740-470: A wireless communication using the then-newly discovered phenomenon of radio waves , showing by 1901 that they could be transmitted across the Atlantic Ocean. This was the start of wireless telegraphy by radio. Audio radio broadcasting began experimentally in the first decade of the 20th century. On 17 December 1902, a transmission from the Marconi station in Glace Bay , Nova Scotia, Canada, became

1827-581: A wireless telegraphy system based on radio waves, a line of inquiry that Marconi noted other inventors did not seem to be pursuing. At the age of 20, Marconi began to conduct experiments in radio waves, building much of his own equipment in the attic of his home at the Villa Griffone in Pontecchio (now an administrative subdivision of Sasso Marconi ), Italy, with the help of his butler, Mignani. Marconi built on Hertz's original experiments and, at

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1914-496: Is a stub . You can help Misplaced Pages by expanding it . This article related to a treaty is a stub . You can help Misplaced Pages by expanding it . Broadcasting Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium , but typically one using the electromagnetic spectrum ( radio waves ), in a one-to-many model. Broadcasting began with AM radio , which came into popular use around 1920 with

2001-726: Is broadcast across airwaves throughout the community, but the listeners cannot always respond immediately, especially since many radio shows are recorded prior to the actual air time. Conversely, receivers can select opt-in or opt-out of getting broadcast messages using an Excel file, offering them control over the information they receive Broadcast engineering is the field of electrical engineering , and now to some extent computer engineering and information technology , which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering. Broadcast engineering involves both

2088-401: Is particularly true of performances of musical artists on radio when they visit for an in-studio concert performance. Similar situations have occurred in television production (" The Cosby Show is recorded in front of a live television studio audience ") and news broadcasting . A broadcast may be distributed through several physical means. If coming directly from the radio studio at

2175-593: Is referred to as over the air (OTA) or terrestrial broadcasting and in most countries requires a broadcasting license . Transmissions using a wire or cable, like cable television (which also retransmits OTA stations with their consent ), are also considered broadcasts but do not necessarily require a license (though in some countries, a license is required). In the 2000s, transmissions of television and radio programs via streaming digital technology have increasingly been referred to as broadcasting as well. In 1894, Italian inventor Guglielmo Marconi began developing

2262-476: Is that the public may learn the outcome of an event before the recording is broadcast, which may be a spoiler . Prerecording may be used to prevent announcers from deviating from an officially approved script during a live radio broadcast, as occurred with propaganda broadcasts from Germany in the 1940s and with Radio Moscow in the 1980s. Many events are advertised as being live, although they are often recorded live (sometimes called " live -to- tape "). This

2349-421: Is varied continuously with respect to the information) or digital (information is encoded as a set of discrete values). Historically, there have been several methods used for broadcasting electronic media audio and video to the general public: There are several means of providing financial support for continuous broadcasting: Broadcasters may rely on a combination of these business models . For example, in

2436-701: The Elettra , was commandeered and refitted as a warship by the German Navy. She was sunk by the RAF on 22 January 1944. After the war, the Italian Government tried to retrieve the wreckage, to rebuild the boat, and the wreckage was removed to Italy. Eventually, the idea was abandoned, and the wreckage was cut into pieces which were distributed amongst Italian museums. In 1943, the Supreme Court of

2523-535: The Marchese Marconi suffered nine heart attacks in the span of three years preceding his death. Marconi died in Rome on 20 July 1937 at age 63, following the ninth, fatal, heart attack , and Italy held a state funeral for him. As a tribute, shops on the street where he lived were "Closed for national mourning". In addition, at 6 pm the next day, the time designated for the funeral, transmitters around

2610-721: The America's Cup international yacht races off Sandy Hook , New Jersey . The transmission was done aboard the SS Ponce , a passenger ship of the Porto Rico Line . Marconi left for England on 8 November 1899 on the American Line 's SS  Saint Paul , and he and his assistants installed wireless equipment aboard during the voyage. Before this voyage the Second Boer War had begun, and Marconi's wireless

2697-596: The BBC , and he spoke of the close association of aviation and wireless telephony in that same year at a private gathering with Florence Tyzack Parbury , and even spoke of interplanetary wireless communication. In 1924, the Marconi Company co-established the Unione Radiofonica Italiana (now RAI ). Have I done the world good, or have I added a menace? In 1914, Marconi was made a Senator in

Regional Agreement for the Medium Frequency Broadcasting Service in Region 2 - Misplaced Pages Continue

2784-582: The Elettra ' s crew was Adelmo Landini , his personal radio operator, who was also an inventor. In December 1898, the British lightship service authorised the establishment of wireless communication between the South Foreland lighthouse at Dover and the East Goodwin lightship , twelve miles distant. On 17 March 1899, the East Goodwin lightship sent the first wireless distress signal ,

2871-602: The Haven Hotel , Sandbanks , Poole Harbour , Dorset , where he erected a 100-foot high mast. He became friends with the van Raaltes, the owners of Brownsea Island in Poole Harbour, and his steam yacht, the Elettra , was often moored on Brownsea or at The Haven Hotel. Marconi purchased the vessel after the Great War and converted it to a seaborne laboratory from where he conducted many of his experiments. Among

2958-774: The Nipkow disk and thus became known as the mechanical television . It formed the basis of experimental broadcasts done by the British Broadcasting Corporation beginning on 30 September 1929. However, for most of the 20th century, televisions depended on the cathode-ray tube invented by Karl Braun . The first version of such a television to show promise was produced by Philo Farnsworth and demonstrated to his family on 7 September 1927. After World War II , interrupted experiments resumed and television became an important home entertainment broadcast medium, using VHF and UHF spectrum. Satellite broadcasting

3045-889: The Senate of the Kingdom of Italy and appointed Honorary Knight Grand Cross of the Royal Victorian Order in the UK. During World War I , Italy joined the Allied side of the conflict, and Marconi was placed in charge of the Italian military's radio service. He attained the rank of lieutenant in the Italian Royal Army and of commander in the Regia Marina . In 1929, he was made a marquess by King Victor Emmanuel III . While helping to develop microwave technology,

3132-698: The Somerset coast, stretching the range to 16 kilometres (9.9 mi). Impressed by these and other demonstrations, Preece introduced Marconi's ongoing work to the general public at two important London lectures: "Telegraphy without Wires", at the Toynbee Hall on 11 December 1896; and "Signalling through Space without Wires", given to the Royal Institution on 4 June 1897. Numerous additional demonstrations followed, and Marconi began to receive international attention. In July 1897, he carried out

3219-465: The Titanic disaster: "Those who have been saved, have been saved through one man, Mr. Marconi ... and his marvellous invention." Marconi was offered free passage on Titanic before she sank, but had taken Lusitania three days earlier. As his daughter Degna later explained, he had paperwork to do and preferred the public stenographer aboard that vessel. Over the years, the Marconi companies gained

3306-815: The White Star Line but by the Marconi International Marine Communication Company . After the sinking of the ocean liner, survivors were rescued by the RMS Carpathia of the Cunard Line . Carpathia took a total of 17 minutes to both receive and decode the SOS signal sent by Titanic . There was a distance of 58 miles between the two ships. When Carpathia docked in New York, Marconi went aboard with

3393-474: The studio and transmitter aspects (the entire airchain ), as well as remote broadcasts . Every station has a broadcast engineer , though one may now serve an entire station group in a city. In small media markets the engineer may work on a contract basis for one or more stations as needed. Guglielmo Marconi Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi ( Italian: [ɡuʎˈʎɛlmo marˈkoːni] ; 25 April 1874 – 20 July 1937)

3480-462: The 17-year-old Marconi the basics of physical phenomena as well as new theories on electricity. At the age of 18 and back in Bologna, Marconi became acquainted with University of Bologna physicist Augusto Righi , who had done research on Heinrich Hertz 's work. Righi permitted Marconi to attend lectures at the university and also to use the university's laboratory and library. From youth, Marconi

3567-787: The Customs officer opened his case to find various apparatuses. The customs officer immediately contacted the Admiralty in London. With worries in the UK about Italian anarchists and suspicion Marconi was importing a bomb, his equipment was destroyed. While in the UK, Marconi gained the interest and support of William Preece , the Chief Electrical Engineer of the General Post Office (the GPO). Marconi applied for

Regional Agreement for the Medium Frequency Broadcasting Service in Region 2 - Misplaced Pages Continue

3654-529: The Italian Ministry of Post and Telegraphs, then under the direction of Maggiorino Ferraris, explaining his wireless telegraph machine and asking for funding, but never received a response. An apocryphal tale claims that the minister (incorrectly named first as Emilio Sineo, later as Pietro Lacava ) wrote "to the Longara" on the document, referring to the insane asylum on Via della Lungara in Rome, but

3741-792: The Needles Station at the Isle of Wight, was published on board the SS Saint Paul before its arrival. At the turn of the 20th century, Marconi began investigating a means to signal across the Atlantic to compete with the transatlantic telegraph cables . Marconi established a wireless transmitting station at Marconi House, Rosslare Strand , County Wexford , in 1901 to act as a link between Poldhu in Cornwall , England, and Clifden in Connemara , County Galway , Ireland. He soon made

3828-552: The United States handed down a decision on Marconi's radio patents restoring some of the prior patents of Oliver Lodge , John Stone Stone , and Nikola Tesla . The decision was not about Marconi's original radio patents and the court declared that their decision had no bearing on Marconi's claim as the first to achieve radio transmission, just that since Marconi's claim to certain patents was questionable, he could not claim infringement on those same patents. There are claims

3915-642: The United States, National Public Radio (NPR) and the Public Broadcasting Service (PBS, television) supplement public membership subscriptions and grants with funding from the Corporation for Public Broadcasting (CPB), which is allocated bi-annually by Congress. US public broadcasting corporate and charitable grants are generally given in consideration of underwriting spots which differ from commercial advertisements in that they are governed by specific FCC restrictions, which prohibit

4002-421: The advocacy of a product or a "call to action". The first regular television broadcasts started in 1937. Broadcasts can be classified as recorded or live . The former allows correcting errors, and removing superfluous or undesired material, rearranging it, applying slow-motion and repetitions, and other techniques to enhance the program. However, some live events like sports television can include some of

4089-405: The agenda of any future communication theory in general". Dissemination focuses on the message being relayed from one main source to one large audience without the exchange of dialogue in between. It is possible for the message to be changed or corrupted by government officials once the main source releases it. There is no way to predetermine how the larger population or audience will absorb

4176-476: The announcement that the message was received at Signal Hill in St. John's , Newfoundland (now part of Canada ), on 12 December 1901, using a 500-foot (150 m) kite-supported antenna for reception – signals transmitted by the company's new high-power station at Poldhu , Cornwall. The distance between the two points was about 2,200 miles (3,500 km). It was heralded as a great scientific advance, yet there also

4263-531: The aspects including slow-motion clips of important goals/hits, etc., in between the live television telecast. American radio-network broadcasters habitually forbade prerecorded broadcasts in the 1930s and 1940s, requiring radio programs played for the Eastern and Central time zones to be repeated three hours later for the Pacific time zone (See: Effects of time on North American broadcasting ). This restriction

4350-439: The central high-powered broadcast tower transmits a high-frequency electromagnetic wave to numerous receivers. The high-frequency wave sent by the tower is modulated with a signal containing visual or audio information. The receiver is then tuned so as to pick up the high-frequency wave and a demodulator is used to retrieve the signal containing the visual or audio information. The broadcast signal can be either analog (signal

4437-407: The company struggled for many years to provide reliable communication to others. The role played by Marconi Co. wireless in maritime rescues raised public awareness of the value of radio and brought fame to Marconi, particularly the sinking of RMS Titanic on 15 April 1912 and RMS Lusitania on 7 May 1915. RMS Titanic radio operators Jack Phillips and Harold Bride were not employed by

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4524-677: The daytime is not possible because of the heavy absorption of the skywave in the ionosphere. It was not a blind test; Marconi knew in advance to listen for a repetitive signal of three clicks, signifying the Morse code letter S . The clicks were reported to have been heard faintly and sporadically. There was no independent confirmation of the reported reception, and the transmissions were difficult to distinguish from atmospheric noise. A detailed technical review of Marconi's early transatlantic work appears in John S. Belrose's work of 1995. The Poldhu transmitter

4611-453: The development of radio for the wartime purposes of aircraft and land communication, radio navigation, and radar. Development of stereo FM broadcasting of radio began in the 1930s in the United States and the 1970s in the United Kingdom, displacing AM as the dominant commercial standard. On 25 March 1925, John Logie Baird demonstrated the transmission of moving pictures at the London department store Selfridges . Baird's device relied upon

4698-692: The first to show that radio signals for medium wave and longwave transmissions travel much farther at night than during the day. During the daytime, signals had been received up to only about 700 miles (1,100 km), less than half of the distance claimed earlier at Newfoundland, where the transmissions had also taken place during the day. Because of this, Marconi had not fully confirmed the Newfoundland claims, although he did prove that radio signals could be sent for hundreds of kilometres (miles), despite some scientists' belief that they were limited essentially to line-of-sight distances. On 17 December 1902,

4785-606: The foundation for the development of radio, television , and all modern wireless communication systems. Marconi was also an entrepreneur, businessman, and founder of The Wireless Telegraph & Signal Company in the United Kingdom in 1897 (which became the Marconi Company ). In 1929, Marconi was ennobled as a Marchese (marquis) by King Victor Emmanuel III of Italy, and, in 1931, he set up Vatican Radio for Pope Pius XI . Guglielmo Giovanni Maria Marconi

4872-506: The frequency of the waves compared to the dipole antennas used by Hertz, and radiated vertically polarized radio waves which could travel longer distances. By this point, he concluded that a device could become capable of spanning greater distances, with additional funding and research, and would prove valuable both commercially and militarily. Marconi's experimental apparatus proved to be the first engineering-complete, commercially successful radio transmission system. Marconi applied to

4959-505: The general public or a relatively small subset; the point is that anyone with the appropriate receiving technology and equipment (e.g., a radio or television set) can receive the signal. The field of broadcasting includes both government-managed services such as public radio , community radio and public television , and private commercial radio and commercial television . The U.S. Code of Federal Regulations, title 47, part 97 defines broadcasting as "transmissions intended for reception by

5046-423: The general public, either direct or relayed". Private or two-way telecommunications transmissions do not qualify under this definition. For example, amateur ("ham") and citizens band (CB) radio operators are not allowed to broadcast. As defined, transmitting and broadcasting are not the same. Transmission of radio and television programs from a radio or television station to home receivers by radio waves

5133-412: The general public: The world's technological capacity to receive information through one-way broadcast networks more than quadrupled during the two decades from 1986 to 2007, from 432 exabytes of (optimally compressed) information, to 1.9 zettabytes . This is the information equivalent of 55 newspapers per person per day in 1986, and 175 newspapers per person per day by 2007. In a broadcast system,

5220-634: The high court was trying to nullify a World War I claim against the United States government by the Marconi Company via simply restoring the non-Marconi prior patent. Marconi was a friend of Charles van Raalte and his wife Florence, the owners of Brownsea Island ; and of Margherita, their daughter, and in 1904 he met her Irish friend, The Hon. Beatrice O'Brien (1882–1976), a daughter of The 14th Baron Inchiquin . On 16 March 1905, Beatrice O'Brien and Marconi were married, and spent their honeymoon on Brownsea Island. They had three daughters, Lucia (born and died 1906), Degna (1908–1998), and Gioia (1916–1996), and

5307-448: The instantaneous signal voltage varies continuously with the pressure of the sound waves . In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values which imposes some bandwidth and dynamic range constraints on the representation. In general usage, broadcasting most frequently refers to the transmission of information and entertainment programming from various sources to

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5394-533: The introduction of the oscillating vacuum tube (valve). The New Street Works factory in Chelmsford was the location for the first entertainment radio broadcasts in the United Kingdom in 1920, employing a vacuum tube transmitter and featuring Dame Nellie Melba . In 1922, regular entertainment broadcasts commenced from the Marconi Research Centre at Great Baddow , forming the prelude to

5481-587: The letter was never found. In 1896, Marconi spoke with his family friend Carlo Gardini, Honorary Consul at the United States Consulate in Bologna, about leaving Italy to go to Great Britain . Gardini wrote a letter of introduction to the Ambassador of Italy in London, Annibale Ferrero, explaining who Marconi was and about his extraordinary discoveries. In his response, Ambassador Ferrero advised them not to reveal Marconi's results until after

5568-449: The maximum transmission distance for radio waves. A breakthrough came in the summer of 1895, when Marconi found that a much greater range could be achieved after he raised the height of his antenna and, borrowing from a technique used in wired telegraphy, grounded his transmitter and receiver. With these improvements, the system was capable of transmitting signals up to 2 miles (3.2 km) and over hills. The monopole antenna reduced

5655-405: The message. They can choose to listen, analyze, or ignore it. Dissemination in communication is widely used in the world of broadcasting. Broadcasting focuses on getting a message out and it is up to the general public to do what they wish with it. Peters also states that broadcasting is used to address an open-ended destination. There are many forms of broadcasting, but they all aim to distribute

5742-629: The microphone: "With the help of God, who places so many mysterious forces of nature at man's disposal, I have been able to prepare this instrument which will give to the faithful of the entire world the joy of listening to the voice of the Holy Father". Marconi joined the National Fascist Party in 1923. In 1930, Italian dictator Benito Mussolini appointed him President of the Royal Academy of Italy , which made Marconi

5829-400: The only daughter of Francesco, Count Bezzi-Scali. To do this he had to be confirmed in the Catholic faith and became a devout member of the Church. He was baptised Catholic but had been brought up as a member of the Anglican Church . On 12 June 1927, Marconi married Maria Cristina in a civil service, with a religious ceremony performed on 15 June. Marconi was 53 years old and Maria Cristina

5916-403: The political field who acknowledged the necessity of merging all the healthy energies of the country into a bundle, for the greater greatness of Italy". Not one Jew was allowed to join the Royal Academy during Marconi's tenure as president from 1930, three years before Adolf Hitler took power in Germany and eight years before Benito Mussolini 's race laws brought his regime's antisemitism into

6003-423: The recipient, especially with multicasting allowing the signal and bandwidth to be shared. The term broadcast network is often used to distinguish networks that broadcast over-the-air television signals that can be received using a tuner inside a television set with a television antenna from so-called networks that are broadcast only via cable television ( cablecast ) or satellite television that uses

6090-410: The spread of vacuum tube radio transmitters and receivers . Before this, most implementations of electronic communication (early radio , telephone , and telegraph ) were one-to-one , with the message intended for a single recipient. The term broadcasting evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about. It was later adopted for describing

6177-451: The suggestion of Righi, began using a coherer , an early detector based on the 1890 findings of French physicist Édouard Branly and used in Lodge's experiments, that changed resistance when exposed to radio waves. In the summer of 1894, he built a storm alarm made up of a battery, a coherer, and an electric bell, which went off when it picked up the radio waves generated by lightning. Late one night, in December 1894, Marconi demonstrated

6264-452: The widespread distribution of information by printed materials or by telegraph. Examples applying it to "one-to-many" radio transmissions of an individual station to multiple listeners appeared as early as 1898. Over-the-air broadcasting is usually associated with radio and television , though more recently, both radio and television transmissions have begun to be distributed by cable ( cable television ). The receiving parties may include

6351-432: The work of James Clerk Maxwell . At the time, this radiation was commonly called "Hertzian" waves, and is now generally referred to as radio waves . There was a great deal of interest in radio waves in the physics community, but this interest was in the scientific phenomenon, not in its potential as a communication method. Physicists generally looked on radio waves as an invisible form of light that could only travel along

6438-478: The world observed two minutes of silence in his honour. The British Post Office also sent a message requesting that all broadcasting ships honour Marconi with two minutes of broadcasting silence. His remains are housed in the Mausoleum of Guglielmo Marconi in the grounds of Villa Griffone at Sasso Marconi , Emilia-Romagna, which assumed that name in his honour in 1938. In 1943, Marconi's elegant sailing yacht,

6525-482: The world's first radio message to cross the Atlantic from North America. In 1904, a commercial service was established to transmit nightly news summaries to subscribing ships, which incorporated them into their onboard newspapers. World War I accelerated the development of radio for military communications . After the war, commercial radio AM broadcasting began in the 1920s and became an important mass medium for entertainment and news. World War II again accelerated

6612-413: Was 26. They had one daughter, Maria Elettra Elena Anna (born 1930), who married Prince Carlo Giovannelli (1942–2016) in 1966; they later divorced. For unexplained reasons, Marconi left his entire fortune to his second wife and their only child, and nothing to the children of his first marriage. Marconi wanted to personally introduce in 1931 the first radio broadcast of a Pope, Pius XI , and announced at

6699-599: Was a two-stage circuit. Feeling challenged by sceptics, Marconi prepared a better-organised and documented test. In February 1902, the SS Philadelphia sailed west from Great Britain with Marconi aboard, carefully recording signals sent daily from the Poldhu station. The test results produced coherer-tape reception up to 1,550 miles (2,490 km), and audio reception up to 2,100 miles (3,400 km). The maximum distances were achieved at night, and these tests were

6786-786: Was a widower with a son, Luigi, married Jameson on 16 April 1864 in Boulogne-sur-Mer , France. Alfonso, Marconi's older brother, was born in 1865. Between the ages of two and six, Marconi and Alfonso lived with their mother in the English town of Bedford . Having an Irish mother helped explain Marconi's many activities in Great Britain and Ireland. When he was three years old, on 4 May 1877, Giuseppe Marconi decided to obtain British citizenship. Marconi could have thus also opted for British citizenship anytime, as both his parents had British citizenship. Marconi did not attend school as

6873-461: Was an Italian electrical engineer , inventor, physicist and politician known for his creation of a practical radio wave -based wireless telegraph system. This led to Marconi being credited as the inventor of radio , and winning the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy". His work laid

6960-668: Was born in Palazzo Marescalchi in Bologna on 25 April 1874, the second son of Giuseppe Marconi (an Italian aristocratic landowner from Porretta Terme who lived in the countryside of Pontecchio ) and his Irish wife Annie Jameson (daughter of Andrew Jameson of Daphne Castle in County Wexford , and granddaughter of John Jameson, the Scottish founder of whiskey distillers Jameson & Sons ). His father, who

7047-491: Was difficult to establish. Marconi began to build high-powered stations on both sides of the Atlantic to communicate with ships at sea, in competition with other inventors. In 1904, he established a commercial service to transmit nightly news summaries to subscribing ships, which could incorporate them into their on-board newspapers. A regular transatlantic radio-telegraph service was finally begun on 17 October 1907 between Clifden , Ireland, and Glace Bay , but even after this

7134-454: Was dropped for special occasions, as in the case of the German dirigible airship Hindenburg disaster at Lakehurst, New Jersey , in 1937. During World War II , prerecorded broadcasts from war correspondents were allowed on U.S. radio. In addition, American radio programs were recorded for playback by Armed Forces Radio radio stations around the world. A disadvantage of recording first

7221-427: Was essentially a laboratory experiment into a useful communication system. Marconi came up with a functional system with many components: In the summer of 1895, Marconi moved his experiments outdoors on his father's estate in Bologna. He tried different arrangements and shapes of antenna but even with improvements he was able to transmit signals only up to one half-mile, a distance Oliver Lodge had predicted in 1894 as

7308-495: Was initiated in the 1960s and moved into general industry usage in the 1970s, with DBS (Direct Broadcast Satellites) emerging in the 1980s. Originally, all broadcasting was composed of analog signals using analog transmission techniques but in the 2000s, broadcasters switched to digital signals using digital transmission . An analog signal is any continuous signal representing some other quantity, i.e., analogous to another quantity. For example, in an analog audio signal ,

7395-690: Was interested in science and electricity. In the early 1890s, he began working on the idea of " wireless telegraphy " – i.e., the transmission of telegraph messages without connecting wires as used by the electric telegraph . This was not a new idea; numerous investigators and inventors had been exploring wireless telegraph technologies and even building systems using electric conduction , electromagnetic induction and optical (light) signalling for over 50 years, but none had proved technically and commercially successful. A relatively new development came from Heinrich Hertz , who, in 1888, demonstrated that one could produce and detect electromagnetic radiation , based on

7482-545: Was to bring news of the conflict to passengers at the request of "some of the officials of the American line." On 15 November the SS Saint Paul became the first ocean liner to report her imminent return to Great Britain by wireless when Marconi's Royal Needles Hotel radio station contacted her 66 nautical miles off the English coast. The first Transatlantic Times , a newspaper containing wireless transmission news from

7569-471: Was – and continues to be – considerable scepticism about this claim. The exact wavelength used is not known, but it is fairly reliably determined to have been in the neighbourhood of 350 metres (frequency ≈ 850 kHz). The tests took place at a time of day during which the entire transatlantic path was in daylight. It is now known (although Marconi did not know then) that this was the worst possible choice. At this medium wavelength, long-distance transmission in

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