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What are the advantages of FSK?
-> frequency shift keying promotes long distance communication. ->it has high security. ->low noise ->efficiency is high. ->decoding of signal is easy.
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.)
Why is frequency shift keying not suitable for high speed modems?
A conventional voice radio cannot transnit data directly. Data digital voltage levels must be converted to audio using a device called a modulator, whichapplies the audio to the transmitter. conversely,at the receiver,a demodulator converts audio back to digital voltage levels. RF-5000 radios=>(build in)Highspeed modems,,,,,, which have Modfulator and demodullator(which permit the radios to operate with either voice or data inputs) on the other side FSK(Frequency shift keying) only encoded binary data(0s and 1s)..... This case, Fsk is not suitable for high speed modems.............. Sandip Layek.
What are the advantages of frequency shift keying?
In FSK the output frequency is dependent on the input bit stream. Here 2 (for Binary FSK) different carrier frequencies are used and they are switched according to input bit stream. When input is at logic1 output is freq. f1 and when input at logic0 output is freq. f2, where f1 and f2 are different.
What are the different forms of amplitude modulation?
There are many types of modulation. A few examples...AmplitudeFrequencyPhase ShiftModified Frequency (MFM)Non Return to Zero Inverted (NRZI)Frequency Shift Keying (FSK)Other contributors - Please add to this list
