A Transceiver is a device which can be both used for transmission and receiving purposes. Some devices are also called transmitter-receiver, but they are different from transceiver as they don't share common circuitry or single housing whereas transmitter and receiver within a transceiver share common circuitry or a single housing. There are many types of transceivers: RF transceivers, fibre-optic transceivers, Ethernet transceivers, wireless (WAP) transceivers, and more but here we are mainly concerned with RF transceiver for satellite purposes.<ref>http://www.pearsonitcertification.com/articles/article.aspx?p=398091&seqNum=13</ref><br \>

Our mobile phones, walkie-talkie etc. are examples of transceivers. <br \>

A modem is similar to a transceiver, in that it sends and receives a signal, but a modem uses modulation and demodulation. It modulates a signal being transmitted and demodulates a signal which is received. <ref>https://en.wikipedia.org/wiki/Transceiver</ref> <br \>