Relative to broadband, narrowband systems carry a narrow frequency range (sometimes defined as bandwidths less than 1 MHz). Voice telephony (3 kHz) is an example of a narrowband system and television (6 MHz) an example of a broadband system.
Found op http://www.agbnielsen.net/glossary/glossaryQ.asp?type=alpha&jump=none
A term used to describe a low bandwidth medium. This usually refers to voice quality data rates, eg. telephone lines.
Found op http://www.ft.com/dbglossary
(networking) A communication channel with a low data rate. [More specific?] The term is sometimes used for an Internet connection via a dial-up modem, typically at 56 kbaud, in contrast to broadband. (2003-10-15)
Found op http://foldoc.org/narrowband
In radio, narrowband describes a channel in which the bandwidth of the message does not significantly exceed the channel`s coherence bandwidth. It is a common misconception that narrowband refers to a channel which occupies only a "small" amount of space on the radio spectrum. The opposite of narro...
Found op http://en.wikipedia.org/wiki/Narrowband
A low-capacity communications circuit/path. It usually implies a speed of 56Kbps or less. (Contrast with wideband and broadband)
Found op http://www.kn.pacbell.com/wired/vidconf/glossary.html
Encompassing a small frequency range, typically less than 300 Hz – the narrowest natural maser lines. Narrowband radio signals tend to be characteristic of those produced by artificial sources and are therefore the type for which SETI equipment is designed to discriminate.
Found op http://www.daviddarling.info/encyclopedia/N/narrowband.html
Type: Term Pronunciation: na′rō-band Definitions: 1. A limited band of sound frequencies, as opposed to the wideband of frequencies also known as white noise; narrowband noise is used to mask hearing in the nontest ear in hearing measurement.
Found op http://www.medilexicon.com/medicaldictionary.php?t=58817
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