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Bandwidth is the width of a frequency range. A receiver filter limits the analysed range; the signal’s occupied bandwidth is a separate quantity.

kB is Boltzmann’s constant, T is absolute temperature in kelvin and B is equivalent noise bandwidth in hertz.

Frequency modulation varies the carrier’s instantaneous frequency. Deviation and the highest modulation frequency influence the required bandwidth.

Try tuning, filter bandwidth and AM, FM, USB, LSB or CW on a simulated waterfall.

Noise power from temperature, bandwidth and noise figure.

Analog filter bandwidths

The calculator does not determine bandwidth, gain or a guaranteed feed-point impedance.

This calculation does not predict feed-point impedance or bandwidth.

Quality factor and connected loads determine bandwidth; the simple LC formula does not.

Receive threshold depends on mode, bandwidth and required quality.

Then widen it: extra bandwidth can pass unnecessary noise and neighbouring signals.

Stated bandwidth