Any analog signal or analog representation of a digital signal whose essential spectral content is limited to that which can be contained within a voice channel of nominal 4-kHz bandwidth . ( 188 ) Note: Narrowband radio uses a voice channel with a nominal 3-kHz bandwidth.
NARROWBAND SIGNAL
Meaning of NARROWBAND SIGNAL in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012