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Crystal and frequency control glossary

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n

The small letter "n" is used to designate the overtone number of a crystal unit.

Narrowband AMPS

Cellular standard that expands the network capacity by up to three times by decreasing the duplex RF channel size to 20 kHz (from 60 kHz).

Narrowband radio

Uses a voice channel with a nominal 3-kHz bandwidth.

Narrowband radio voice frequency (NBRVF)

In narrowband radio, the nominal 3-kHz bandwidth allocated for single channel radio that provides a transmission path for analog and quasi-analog signals.

National Telecommunications and Information Administration (NTIA)

The federal government's spectrum management.

Natural frequency

Of an antenna, the lowest frequency at which the antenna resonates without the addition of any inductance or capacitance.

Necessary bandwidth

For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions.

Nominal frequency

The specified "name plate frequency" of a crystal or oscillator.

NTC

Abbreviation for negative temperature coefficient.

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