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What is multiple subcarrier frequency?

Updated: 9/22/2023
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Q: What is multiple subcarrier frequency?
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What is the color subcarrier frequency?

A modulated monochrome signal whose side-bands convey color information.


In FM transmitter the rate of frequency swing is determined by the?

The frequency with which the carrier frequency is deviated is exactly the modulating frequency, i.e. the frequency of the sound that makes up the music or voice announcement, stereo pilot, SCA subcarrier, etc.


Can an analog tv receive a digital cable signal?

using two subcarriers and a main carrier signalaudio subcarrier is frequency modulated with audiocolor subcarrier is phase modulated with chromamain carrier is amplitude modulated with sum of video and modulated audio subcarrier & color subcarrier; then lower sideband is suppressed by a filter.closed captions are serial ASCII encoded characters embedded in vertical blanking of video signal


What is a subcarrier oscillator?

what is sub carrier oscillator?


What is the vibration whose frequency is a multiple of the fundamental frequency?

Overtone


The frequency of sound vibrations is measured in?

Same as any other frequency: in Hertz, or some multiple, like kilohertz.


What is the whole number multiple of the fundamental frequency of a string?

A harmonic.


Why fft and ifft used in ofdm?

we use IFFT in OFDM to convert the signal from frequency domain to time domain the idea in OFDM generation, the transmitter accepts a stream of data and converts them to symbols using modulation technique, for example QPSK. Then the S/P converter takes the output 4 symbols and mixes each one with one of the subcarrier, we now have 4 sine waves then add the 4 sine. Now we notice that S/P conversion stage the data represent as a function of frequency. After addition stage stage the data represent as a function of time. This conversion is actually a well-known computational technique called the inverse Fast Fourier transform.


What are harmonics in power distribution system?

Harmonics are a multiple of the fundamental frequency. If the power frequency is 60Hz, harmonics occur at 120Hz, 180Hz, 240Hz, etc.


What is the difference between frequency distribution and relative frequency distribution?

Frequency distribution refers to a set of frequencies with a particular set of values into which a statistical population is grouped. Relative frequency refers to data presented in a table that demonstrates the relative frequency of multiple non-overlapping classes.


What is frequency interleaving?

Wideband signal generation systems and methods are provided which employ frequency interleaving for generating wideband signals. A general method increases a digitally synthesized signal's bandwidth by frequency interleaving multiple digitally synthesized signal sources of narrower bandwidth. Frequency interleaving creates a continuous wideband signal by summing multiple narrower band signals that overlap in frequency. According to certain embodiments, digital signal processing (DSP) and analog mixing are used to create the multiple narrower band signals such that a high fidelity, continuous wideband signal is produced when the multiple narrower band signals are summed.


What is red green and blue mixed together in the same computer signal LED composite video?

Composite video is an "older" type of video signalling allowing all the information to be transmitted on a single coaxial cable or radio frequency carrier. It is a combination of amplitude modulation with phase modulation of a common color subcarrier frequency. The brightness is coded in the amplitude of that subcarrier and the color is coded in the phase of that subcarrier: red is one phase (e.g. 0 degrees), green is a phase 120 degrees away from red (e.g. 120 degrees), and blue is a phase 120 degrees away from green (e.g. 240 degrees). Composite video also requires a color burst during every horizontal sync period to provide a phase reference to prevent color drifting over time. It is not clear from your question what combination of red, green, and blue you are describing. If the red, green, and blue magnitudes are identical (producing white) then the color subcarrier turns off and the brightness of the white is simply a "baseband" black & white signal (possibly even just a DC voltage). But if any color is to be produced the color subcarrier turns on with a phase somewhere from 0 degrees to 360 degrees, with each phase angle being a different color on the spectrum from red to violet (just like seen in a rainbow). Very few computer monitors use this system due to limited color resolution and thus poor display quality on larger screens.