What is digital frequency modulation?
Digital amplitude modulation involves varying the amplitude of a carrier wave in discrete sections according to binary data. With digital frequency modulation, the frequency of a carrier or a baseband signal is varied in discrete sections according to binary data.
What DTV means?
Digital television
Digital television (DTV) programming is available over-the-air and from cable and satellite service providers. To receive free over-the-air digital broadcasts, your television, set-top box, or VCR must be equipped with a built-in digital tuner.
What is frequency modulation in music?
Frequency modulation, or FM, is a variation in the frequency of a signal being generated, according to the instantaneous value of a modulating waveform. When the modulation is of subsonic frequency, the result is a slow or rapid variation in the pitch of the carrier signal which is referred to as vibrato.
What does FM modulation do?
FM synthesis uses a modulator oscillator and a sine wave carrier oscillator. The modulator oscillator modulates the frequency of the waveform generated by the carrier oscillator within the audio range, thus producing new harmonics. These harmonics are known as sidebands.
What is digital modulation and its types?
There are three types of digital modulation, and they are: Amplitude shift key (ASK) Frequency shift key (FSK) Phase shift key (PSK)
What do you mean by digital video?
Digital video is an electronic representation of moving visual images (video) in the form of encoded digital data. This is in contrast to analog video, which represents moving visual images in the form of analog signals. Digital video can be copied and reproduced with no degradation in quality.
What is frequency modulation dummies?
In frequency modulation, the intensity of the carrier wave isn’t varied. Instead, the exact frequency of the carrier wave is varied in sync with the audio signal. When the audio signal is higher, the frequency of the broadcast signal goes up a little. When the audio signal is lower, the frequency slows down a bit.
What is FM modulation index?
The modulation index of FM is defined as the ratio of the frequency deviation of the carrier to the frequency of the modulating signal. mf = Modulation Index of FM = ∆f/fm.