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What is band limited signal?
A signal is said to be a band limited signal if all of it's frequency components are zero above a certain finite frequency. i.e it's power spectral density should be zero above the finite frequency.
What is a carrier reinsertion oscillator?
A carrier reinsertion oscillator is an electronic circuit used in a radio receiver that is designed to receive single side band carried suppressed radio transmissions. As suggested by the name, in a single side band carried suppressed signal, the carrier signal is suppressed (not transmitted) to save power and/or bandwidth. Before the single side band carried suppressed signal can be decoded to extract the original audio signal, the carrier must first be reinserted. This must be done accurately, otherwise the recovered audio signal will be unintelligible.
Why do one go for attenuator while filter has attenuation band?
Attenuator means which limits the voltage of a signal to some particular level but here filter attenuation means which limits some particular frequencies(i.e., particular Band)
Why should be the voltage of the modulating signal greater than that of the carriers in the nonlinear modulators?
When the modulating signal is greater than the carrier it can cause over modulation, that will cut of the peaks of the modulating signal and when detected by the receiver the final audio signal will also show the flat peaks and the results will be a distorted sound at the speaker. A 90% modulation is always better than a 100% modulation. In the case of frequency modulation it will cause the frequency to shift to much and will result in a to wide band and will cause adjacent channel interference, it can be so severe that a transmitter can occupy the whole spectrum of the band that is allocated for FM broadcasting.
How can you convert the digital signal given on the speedometer in the car into radio waves which can be received some where else?
First of all digital signal cant be transmitted wirelessly. digital signal can only be transmitted through optical fibre in the form of pulses. so we have to convert digital signal to analog form with the help of DIGITAL TO ANALOG CONVERTOR ( D TO A CONVERTOR). Then this analog signal should be super imposed on carrier signal called MODULATION. modem can be used for that. then that signal can be transmitted to the air through alloted band width like cellular system with the help of transceiver. at the reciveing end we can demodulate the signal with the help of modem & can convert it back to digital form through A TO D CONVERTOR.
What is a drum signal?
a drum signal is when the drummer of a band ques the rest of the band to come .
Can a signal be time-limited and band-limited at the same time?
No, a signal that is band limited is not time-limited while a signal that is time-limited isnot band limited.
What do you get when you cross a mathematical with a rubber band?
Unfortunately
Where did the expression 'gum band' meaning an elastic 'rubber band' come from in some areas of the US?
The expression gum band came from the state Pennsylvania.
What is meant by base band digital signal?
It means the signal is not modulated.
What describes a signal with a frequency of 20GHz in a satellite radio transmissions?
A downlink signal; a Ka Band signal
Why a signal that is band limited is not time-limited while a signal that is time-limited is not band limited Improve Answer Discuss the question Can a signal be time-limited and band-limited at th?
A band-limited signal is one in which the Fourier transform is zero above a certain frequency. In other words it's a signal that ahas a finite frequency content. The simplest case is a pure sinusoidal signal, whose Fourier transform consists of a delta function centred on the frequency of the signal. A band-limited signal can be reconstructed exactly if it is sampled at at more than twice the maximum frequency present in the signal. A time-limited signal is a signal that is zero above a finite. An example of this would be a short pulse. The reason a signal cannot be both band-limited or time-limited is due to their relationship via the Fourier transform. One can show it is impossible for the Fourier transform of a signal with compact support ie either time or band-limited, to also have compact support. A time-limited signal must have a continuous frequency spectrum existing over all possible frequencies and a band-limited signal can only arise from signal existing for all time. Note this indicates in reality it is impossible to have a truly band-limited signal as it would take infinite time to transmit, but it is nonetheless a useful concept and we can produce nearly band-limited signal to a high degree of accuracy.
What describes a signal with a frequency of 20 GHz in satellite radio transmissions?
A downlink signal A Ka Band signal
What type of signal does ISDN use?
Out-of-band
Why a signal is called base band signal?
In signal processing, baseband describes signals and systems whose range of frequencies is measured from zero to a maximum bandwidth or highest signal frequency; it is sometimes used as a noun for a band of frequencies starting at zero.
What does the expression 'three dog night' mean?
It is a band
Is korn anti christ band?
no it is just their way of expression
