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Definition of wideband
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I have a question related to definition of "wideband" signal. I found
definitions which define wideband in relative terms. Is there any
specific definition for wideband/narrowband signal ?
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I doubt it. That would be too sensible. In the sad world of domestic TV
reception some manufacturers of amplifiers attempted to institute 'wideband'
as meaning 470 to 860MHz and 'broadband' as meaning 45 to 860MHz, but it
never caught on.
Aerials are either 'wideband' or 'grouped', and amplifiers are either
'wideband' (undefined, really), or 'channelised' (nominal bandwidth of
8MHz). In reality channelised amplifiers are usually wideband ones preceded
and followed by passive tuned stages.
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Thanking you,
Nilesh
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In general terms in the radio business, narrowband is used for two-way
radio speech channels with deviation usually not more than
+/-5KHz, wideband usually relates to broadcast radio where peak
deviation will be +/-75KHz at VHF.
Similarly a narrowband link will carry one or at most two audio
channels, where broadband will often (these days) be a microwave link
carrying anything up to 16 x 2Mb circuits.
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