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21-683: Yaesu had initially been formed with the intention to develop and manufacture commercial and amateur radio transceivers for the Japanese market, but only five years after its formation the company had signed foreign sales agreements for export to Australia and Germany . In Europe, the equipment was sold under the Yaesu brand and the Sommerkamp brand. In 1963 the Swiss firm Sommerkamp imported Yaesu equipment and sold it using their own brand . Yaesu's line of equipment

42-452: A wireless router . Aircraft carry automated microwave transceivers called transponders which, when they are triggered by microwaves from an air traffic control radar , transmit a coded signal back to the radar to identify the aircraft. Satellite transponders in communication satellites receive digital telecommunication data from a satellite ground station , and retransmit it to another ground station. The transceiver first appeared in

63-409: A "receiver". On a mobile telephone or other radiotelephone , the entire unit is a transceiver for both audio and radio. A cordless telephone uses an audio and radio transceiver for the handset, and a radio transceiver for the base station . If a speakerphone is included in a wired telephone base or in a cordless base station, the base also becomes an audio transceiver. A modem is similar to

84-618: A narrower radio bandwidth . With System Fusion, special attention was paid to compatibility with analog FM radio. This was intended to simplify migration of the existing amateur radio repeaters from analog to digital technology. In the early 2000s, minimum-shift keying (GMSK) technology emerged in the amateur radio market as the dominant digital mode. In 2013 Yaesu introduced “System Fusion,” new technology utilizing C4FM 4-level FSK technology for transmitting digital voice data . The System Fusion communication protocol enables devices to analyze an incoming signal and automatically determine if it

105-710: A transceiver in that it sends and receives a signal, but a modem uses modulation and demodulation. It modulates the signal being transmitted and demodulates the signal being received. Transceivers are called Medium Attachment Units ( MAUs ) in IEEE 802.3 documents and were widely used in 10BASE2 and 10BASE5 Ethernet networks. Fiber-optic gigabit , 10 Gigabit Ethernet , 40 Gigabit Ethernet , and 100 Gigabit Ethernet utilize GBIC , SFP , SFP+ , QSFP , XFP , XAUI , CXP , and CFP transceiver systems. Because transceivers are capable of broadcasting information over airwaves, they are required to adhere to various regulations. In

126-532: Is also used for other devices which can both transmit and receive through a communications channel , such as optical transceivers which transmit and receive light in optical fiber systems, and bus transceivers which transmit and receive digital data in computer data buses . Radio transceivers are widely used in wireless devices . One large use is in two-way radios , which are audio transceivers used for bidirectional person-to-person voice communication. Examples are cell phones , which transmit and receive

147-425: Is an audio signal communications channel in a storage device or mixing console . It is used in operations such as multi-track recording and sound reinforcement . Signal flow is the path an audio signal will take from source to the speaker or recording device. Signal flow may be short and simple as in a home audio system or long and convoluted in a recording studio and larger sound reinforcement system as

168-406: Is commonly used by police and fire departments. Digital transmissions tend to be clearer and more detailed than their analog counterparts. Many modern wireless devices operate on digital transmissions. In a wired telephone , the handset contains the transmitter (for speaking) and receiver (for listening). Despite being able to transmit and receive data, the whole unit is colloquially referred to as

189-418: Is still on amateur radio transceivers. Transceiver In radio communication , a transceiver is an electronic device which is a combination of a radio trans mitter and a re ceiver , hence the name. It can both transmit and receive radio waves using an antenna , for communication purposes. These two related functions are often combined in a single device to reduce manufacturing costs. The term

210-583: Is using C4FM or conventional FM mode. System Fusion also enables data transfer at full rate with speeds reaching up to 9,600 bits per second. Yaesu is the only company with System Fusion-enabled devices. ICOM , alongside the Japan Amateur Radio League has developed devices using the D-STAR protocol. Other brands use DMR , among other modes. Yaesu has manufactured a number of devices listed in Yaesu radio transceivers throughout its history. The focus

231-441: The 1920s. Before then, receivers and transmitters were manufactured separately and devices that wanted to receive and transmit data required both components. Almost all amateur radio equipment today uses transceivers, but there is an active market for pure radio receivers, which are mainly used by shortwave listening operators. Analog transceivers use frequency modulation to send and receive data. Although this technique limits

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252-452: The FCC monitors not only the production but also the use of these devices. Audio signal An audio signal is a representation of sound , typically using either a changing level of electrical voltage for analog signals , or a series of binary numbers for digital signals . Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz, which corresponds to

273-474: The STANDARD radio equipment brand from Marantz Japan in 1998 and changed the company name to Vertex Standard Co., Ltd. ( 株式会社バーテックススタンダード , Kabushiki-gaisha Bātekkusu Sutandādo ) in 2000. In 2007, Motorola announced its intention to purchase 80% of Vertex Standard and form a joint venture with Tokogiken (a privately held Japanese company controlled by Jun Hasegawa), which would hold the other 20%. This deal

294-561: The United States, the Federal Communications Commission oversees their use. Transceivers must meet certain standards and capabilities depending on their intended use, and manufacturers must comply with these requirements. However, transceivers can be modified by users to violate FCC regulations. For instance, they might be used to broadcast on a frequency or channel that they should not have access to. For this reason,

315-473: The application. Outputs of professional mixing consoles are most commonly at line level . Consumer audio equipment will also output at a lower line level. Microphones generally output at an even lower level, known as mic level . The digital form of an audio signal is used in audio plug-ins and digital audio workstation (DAW) software. The digital information passing through the DAW (i.e. from an audio track through

336-477: The complexity of the data that can be broadcast, analog transceivers operate very reliably and are used in many emergency communication systems. They are also cheaper than digital transceivers, which makes them popular with the CB and HAM radio communities. Digital transceivers send and receive binary data over radio waves. This allows more types of data to be broadcast, including video and encrypted communication, which

357-423: The lower and upper limits of human hearing . Audio signals may be synthesized directly, or may originate at a transducer such as a microphone , musical instrument pickup , phonograph cartridge , or tape head . Loudspeakers or headphones convert an electrical audio signal back into sound. Digital audio systems represent audio signals in a variety of digital formats. An audio channel or audio track

378-479: The signal may pass through many sections of a large mixing console, external audio equipment , and even different rooms. Audio signals may be characterized by parameters such as their bandwidth , nominal level , power level in decibels (dB), and voltage level. The relationship between power and voltage is determined by the impedance of the signal path. Signal paths may be single-ended or balanced . Audio signals have somewhat standardized levels depending on

399-457: The two sides of a phone conversation using radio waves to a cell tower , cordless phones in which both the phone handset and the base station have transceivers to communicate both sides of the conversation, and land mobile radio systems like walkie-talkies and CB radios . Another large use is in wireless modems in mobile networked computer devices such laptops , pads, and cellphones, which both transmit digital data to and receive data from

420-542: Was completed in January 2008. The joint venture was dissolved effective January 1, 2012. The Vertex Standard land mobile division operates as a wholly-owned subsidiary headquartered in Tokyo, Japan. The Amateur Radio, Airband and Marine Radio business was transferred to the new company "Yaesu Musen". In 2013, YAESU launched its own digital mode of operation for amateur radio : "System Fusion". Like other digital modes, Fusion utilize

441-623: Was first imported into the US by Spectronics, Inc. located in Signal Hill, California , in 1965. Yaesu became an important presence in the U.S. amateur radio market with the introduction and improvement of its very popular FT-101 line of equipment in the 1970s. In addition, transceiver manufacture was outsourced to Henry Radio in Los Angeles . Sako Hasegawa died in 1993. Following his death, Jun Hasegawa took over as managing director. Yaesu Musen acquired

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