Wideband modem
Encyclopedia
In telecommunication
, the term wideband modem has the following meanings:
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term wideband modem has the following meanings:
- A modemModemA modem is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data...
whose modulated outputOutputOutput is the term denoting either an exit or changes which exit a system and which activate/modify a process. It is an abstract concept, used in the modeling, system design and system exploitation.-In control theory:...
signalSignalling (telecommunications)In telecommunication, signaling has the following meanings:*the use of signals for controlling communications...
can have an essential frequencyFrequencyFrequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency.The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency...
spectrum that is broader than that which can be wholly contained within, and faithfully transmitted through, a voice channelChannel (communications)In telecommunications and computer networking, a communication channel, or channel, refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel...
with a nominal 4 kHz bandwidth. - A modem whose bandwidth capability is greater than that of a narrowband modemNarrowband modemIn telecommunication, a narrowband modem is a modem whose modulated output signal has an essential frequency spectrum that is limited to that which can be wholly contained within, and faithfully transmitted through, a voice channel with a nominal 4 kHz bandwidth.Note: High frequency modems...
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