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Like in modems, you make digital zeros one frequency and digital ones another frequency.
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What would you be using if you were trying to tune into AM or FM frequency?
A radio?
Application of flip flop as a frequency doubler?
One way of using a flip flop as a frequency doubler is to create an oscillator at the desired doubled frequency, and then divide by two with the flip flop, resulting in the original frequency, and then controlling the oscillator with a phase locked loop.
Underground cable the distortion in the transmission of carrier frequency can be eliminated by using?
In an underground cable, the distortion in the transmission of carrier frequency can be eliminated using inductive loading. This distortion causes a delay which will result into a variance of frequencies.Ê
What is the Difference between frequency converter and frequency inverter?
frequency is genrally cycle per second, and frequencies may be of a dc nature or ac , devices which convert dc frequency in to an ac frequency are frequency converters and devieces which convert ac frequency in to dc frequency are frequency inverters. because in terms of power electronics, devices which convert ac to dc are called converters, and devices which convert dc in to ac are called "inverters" 'mehboob hunzai" I'm a engineers in this devices, the frequency inverter is convert AC to AC but with variable frequency output, means the frequency & voltage are adjustable; The frequency converter can convert DC to AC, like 24VDC to 220VAC and also the frequency is adjustable. One most important thing is the out power of frequency inverter just can be used for controlling AC motor, while frequency converter can be treated as normal power supply as our daily using power grid. "zhuge fs"
How do you calculate minimum clock period in a digital circuit?
If you have the Maximum clock frequency, then you can figure out the minimum clock period using this formula: 1/(minimum clock period) = (Maximum clock frequency).
Advantages of psk over fsk and ask?
PSK (Phase Shift Keying) is advantageous over FSK (Frequency Shift Keying) and ASK (Amplitude Shift Keying) because it provides higher data rates and better spectral efficiency. PSK is less susceptible to noise and interference since phase changes are more discernible than frequency or amplitude changes. PSK also allows for easier implementation in digital communication systems.
What is the difference between FSK and ASK?
Both are digital modulation types for radio, transmitting data as two states usually. Amplitude shift keying varies the amplitude of the carrier, and often is used to switch the carrier on or off for the two states. Frequency shift keying varies the frequency of the carrier, so it is one of two distinct frequencies. These can be seen as digital versions of AM and FM.With amplitude shift keying the detector needs to distinguish between the two levels, which can vary widely due to propagation. Some sort of gain control or automatic threshold adjustment is needed, and noise bursts can be misinterpreted as data. This method tends to be simpler to implement, but less reliable than other modulation types (more prone to interference).Frequency shift keying is more or less constant amplitude so the interference (which is mostly AM in nature) is better suppressed. Frequency stability can be an issue with narrow band UHF radios.---ASKAudio Shift Keying - Digital signals are sent by modulating a carrier using an two or more tone audio tone. This is generally used for single sideband transmissions, but since it is an audio signal it can be used on FM/PM/AM.FSKFrequency Shift keying - Digital signals are sent by changing the frequency of an amplitude UN-modulated signal and decoding it using a side-tone receiver to reproduce the tones. FSK can be sent by any mode which has a 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 is the benefit of using wireless telegraphy?
The lack of wires and supporting devices.
What is meant by the phrase keying in?
The definition for "keying in" depends on the device being used. For telephones (including mobile phones), "keying in" information means using the numeric keypad to provide information (e.g., account number, spelling of last name, etc.). For calculators, "keying in" information means using the calculator keypad to enter numbers and execute operations on those values. For computers with a numeric keypad, "keying in" information means entering numbers into a particular program. For computers with a standard keyboard "keying in" information means typing in information.
What is carrier frequency?
A carrier frequency is a single radio frequency with steady amplitude. Alone, it would sound like silence on a receiver. This is the frequency that a radio receiver is tuned into. To be of use in communication, this carrier wave has to be changed in time with another signal (usually audio), called 'Modulation' It can be turned on and off using a Morse key. It can be changed by shifting the frequency, FM. It can be changed by varying the amplitude, AM. It can be changed by adding or subtracting audio to the carrier. Single Side Band. It can have data applied by shifting between two carrier frequencies. FSK. (Frequency shift keying.) It's called a carrier, because it is the carrier of information without necessarily being the information itself.
What shift of color do you receive from stars as you get closer?
Blue shift as you get closer because by the Doppler effect, the frequency of the light increases, so the light seems more blue. Using the same logic, there is a red shift for light as you move away from stars.
How does the speed of a wave affect its wavelength?
This can be answered using light or sound. Light will remain at a constant speed regardless of frequency or amplitude. Its shift in frequency (Doppler shift) is caused by the extreme distances the light had to travel to get here. Still it remains at the same speed. Sounds speed will change with local conditions. Also subject to an audible Doppler shift when a constant note is moved past you you can hear the pitch shift. The motion compresses the sound as it approaches and spreads it out as it moves away from you.
Is it possible to transmit a digital signal coded as square wave as used inside a computer using radio transmission without loss?
Digital signals are regularly transmitted by radio systems. The traditional way of doing it was by frequency-shift keying (FSK) where the frequency was changed slightly between two states which represented logical 0 and 1. Another method uses phase-shift keying (PSK) which uses two phase states of the carrier wave to represent 0 and 1. The main issue in transmitting data by radio is the bandwidth, and with 2-state modulation like FSK or PSK the bandwidth must exceed the bit rate. Another important issue is signal-to-noise ratio because radio signals can become very weak over long distances. Alternative systems are now available in which the modulation can have more than 2 states. For example four alternative phase states instead of two can be used for each symbol, which allows 4 bits to be transmitted per symbol instead of two, so the data rate is doubled for the same bandwidth. General quadature-amplitude modulation (QAM) keying employs M amplitude states and N phase states to transmit MN bits in each symbol. This might seem a good idea but the disadvantage with using high values of M and/or N is that it requires a very high signal-to-noise ratio. A popular choice of modulation for data transmission using radio links in which the bandwidth and the signal strength are limited is quadrature phase-shift keying (QPSK) which provides a good compromise between data rate, bandwidth and signal-to-noise ratio.
What is the Reasons of using intermediate frequency?
what is the reasion of using intermediate frequency in television system
Can you give me a sentence using the word frequency?
What frequency are you on?
What has the author I W Turner written?
I W. Turner has written: 'Digital modulation/demodulation using phase reversal keying'
