Ac signal frequency

Frequency corresponds to the rate at which a signal can transmit information , so you cannot “fit” 10 kHz of audio information into a 5 kHz carrier. Furthermore, practical considerations require the carrier frequency to be significantly higher than the information (i.e., baseband) frequency.

The frequency formula in terms of time is given as: f = 1/T where, f is the frequency in hertz, and T is the time to complete one cycle in seconds. The frequency formula in terms of wavelength and wave speed is given as, f = ????/λ where, ???? is the wave speed, and λ is the wavelength of the wave.

Frequency spectrum of a signal is the range of frequencies contained by a signal . For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/π sin(2πft) + 4A/3π sin(2π(3f)t) + 4A/5π sin(2π(5f)t + …)

The frequency of a signal defines the total number of complete cycles of a waveform that are existing per sec. While bandwidth is the range of frequency of signal while transmission thus shows its capacity of data flow. The frequency of a signal is specified as cycles/second .