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Home > Narrowband modem


In 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 (HF) modems are limited to operation over a voice channel with a nominal 3 kHz bandwidth.

Source: from Federal Standard 1037C and from MIL-STD-188




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Narrowband Modem Frequency Bandwidth Voice Nominal

Topics: Narrowband Modem Frequency Bandwidth Voice Nominal Limited Khz...

Narrowband 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 baNarrowbandNarrowband narrow bandwidth refers to a signal which occupies only a small amount of space on the radio spectrum the opposite of broadband or wideband. This is entirely relative to what is being described; for example, an FM broadcast station takes up 150 


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