Transceiver

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For the device used in avalanche rescue, see avalanche transceiver.

A transceiver is a device that has both a transmitter and a receiver which are combined and share common circuitry or a single housing. If no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s. Technically, transceivers must combine a significant amount of the transmitter and receiver handling circuitry. Similar devices include transponders, transverters, and repeaters.

Transceivers are called Medium Attachment Units (MAUs) in IEEE 802.3 documents.

1 Ethernet
2 Radio technology
3 Telephony
4 Sources
5 External articles

Ethernet

Transceivers known as Medium Attachment Units were widely used in 10base2 and 10base5 Ethernet networks. Fibre-optic gigabit and 10 gigabit Ethernet utilize transceivers known as GBIC, SFP, XFP and XAUI.

Radio technology

Main article: Two-way radio

A modern HF transceiver with spectrum analyzer and DSP capabilities

In radio terminology, a transceiver means a unit which contains both a receiver and a transmitter. It was quite common to have these units separated. Ham radio operators can build their own equipment and it is always easier to design and build a simple unit having one of the functions, transmitting or receiving. Almost every modern amateur radio equipment is now a transceiver but there is an active market for pure radio receivers, mainly for Shortwave listening operators. An example of a transceiver would be a walkie-talkie, or a CB radio.

Telephony

On a wired telephone, the handset contains the transmitter and receiver for the audio. The whole unit is colloquially referred to as 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 (less common), the base also becomes an audio transceiver in addition to the handset.

A modem is also a transceiver, but is usually called by its own name rather than the more generic one.

Sources

External articles

Electronics portal

Look up transceiver, handset in Wiktionary, the free dictionary.

Patents

U.S. Patent 0,716,136 , John Stone Stone, "Apparatus for simultaneously transmitting and receiving space telegraph signals"
U.S. Patent 1,526,308 , A. J. Kloneck, "Simultaneous sending and receiving system"
U.S. Patent 1,570,261 , A. J. Kloneck, "Simultaneous sending and receiving system"
U.S. Patent 1,715,701 , C. Le G. Fortescue, "Combined wireless sending and receiving system"