0
Why does the frequency of a carrier wave of an analog signal need to be 200 000 Hz?
Wiki User
∙ 10y ago
The frequency of the carrier of an analog signal can be anything you want it to be.
Just be sure you notify the intended recipient of the frequency you're using to
transmit, otherwise he won't be able to find your signal on his radio dial and receive
your message.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How is sound messured?
Frequency is the number of wavelengths produced in one second.
What is the wavelength of a wave with a speed of 345 ms and a frequency of 600 Hz?
Please use the relationship:Speed = frequency x wavelengthIn this case, you need to divide the speed by the frequency.
Why does the resonant frequency have to be equal to the natural frequency of the system so the resonant can happen?
Let's say that that's what resonance is all about. Anyway, it need not be exactly the same frequency; just close enough.
What is the frequency of a wave if its period is 0.75 seconds?
The frequency is the reciprocal of the period. In other words, in this case you need to divide 1 / 0.75 seconds. The answer will be in hertz (Hz).
How do you find the energy of a photon?
You need to know the photon's frequency or wavelength. If you know the wavelength, divide the speed of light by the photon's wavelength to find the frequency. Once you have the photon's frequency, multiply that by Planck's Konstant. The product is the photon's energy.
Is The carrier frequency is usually lower than the modulating frequency?
when the frequency is low , energy will be obviously low. To increase the energy of the signal we need to increase the frequency. This is achieved by multiplying the message signal with the carrier signal (with high frequency).
Why is amplitude of demodulated FM signal much less than modulated signal?
because demodulated FM is an audio signal, which the frequency is much smaller that is why it can be transmitted alone. It need carrier which has large frequency. Modulated signal is an audio signal + carrier that is why the amplitude is higher.
What is the relation between carrier frequency and modulating signal?
If the modulating system is AM (Amplitude Modulation) then the amplitude of the carrier wave changes with the amplitude of the modulation. On a specrum analyser that shows up as frequency sidebands. If the frequency of the carrier waves depends on the amplitude of the modulating signal that is called FM (frequency modulation). On a spectrum analyser that shows up as sidebands also.
What is the frequency and wave form of old land line phone carrier?
First answer.The landline phone has no carrier frequency it is a baseband signal with a 3KHz bandwidth.Correction:So there is a signal that can handle a 3KHz bandwidth, what do you call that signal? I call it a carrier, if you don't have a carrier, you will need to amplify the audio every 30 meters else you will end up with no audio at the end of the line. So there is a carrier on all phone lines. Note the carrier signal are up to 90 VPP and is AM modulated at the instrument, but in digital systems the carrier are switched on and of, FSK modulation.
What is the need for fourier transform in analog signal processing?
The fourier transform is used in analog signal processing in order to convert from time domain to frequency domain and back. By doing this, it is easier to implement filters, shifters, compression, etc.
Why Need for carrier frequency stability?
Explain the need for carrier frequency stability in radio transmitters?
How does the FSK modulator circuit work?
The FSK (Frequency Shift Keying) modulator circuit works by shifting the carrier, a sine wave of a given frequency, to another frequency back and forth as the input signal changes. On the receiving end, the demodulator works by detecting one or both of the frequencies, often with a band-pass filter, regenerating the input signal. You can also use a signal processor to convert the carrier from time domain to frequency domain with a fourier transform, and then pick off the signal that way.) The FSK method of modulating/demodulation is typically limited to low frequency signal rates, such as 300 bits per second. You can also modulate multiple input signals onto one carrier, but the workable signal rate of each goes down. (In one signalling example, six analog inputs were used to duty cycle modulate six 10 hertz pulse trains, which were then FSK modulated onto one carrier. The receiving end had six band-pass filters, and six converters back to the analog domain.) If you are going to modulate more than one signal, you need to pick the frequencies carefully, so that their harmonic spectra do not intersect, otherwise you could get cross-talk if there is distortion in the carrier.)
Where should analog to digital converter be placed?
where an analog signal is to be converted into digital signal,because in some applications we need digital signal where we have analog signal that is we use an A/D converter
What Technology is used to modify analog signals to make them suitable for carrying data over a communication path?
Normally analog signals don't need any modifying, communications channels are naturally analog in nature. To multiplex several analog signals on one path one often uses FDM (Frequency Division Multiplexing), which requires modulating a carrier with each analog signal to be sent and then combining the modulated carriers. But I don't know if that was what you were referring to.
Why oscillator is needed in transmitter circuit?
Low frequency signal are not able to get propagated throught longer distance. So it is to be carried by a carrier wave. Hence high frequency carrier wave is to be generated by the help of an oscillator. So we need an oscillator here a crystal oscillator to produce high frequency carrier waves.
Need of modulation in communication?
Need for modulation: 1. Length of the antenna for a transmitter is inversly proportional to the frequency of the signal to be transmitted. So we try shift the frequency of the singal for the transmission to higher frequencies. 2. Every transmission of signal in a bandwidth is assigned with a particular frequency which is attained by modulating the signal with the carrier frequency. Different modulation techniques are implemented according to the requirements and compatibilities
Would you use a analog multimeter to check the signal level of a digital circuit?
If its a very low frequency signal you might. A digital `signal` is still on and off voltages. If its too fast to see the meter changing then you need another method.
