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Why only AM but not FM used for transmitting video signal?
Because of video's complex nature, AM lends itself to transmitting several different signals simultaneously, like video, chroma, sync, etc. and it can provide the bandwidth required to do it easily. FM for the audio has a bandwidth of 100 khz, and FM is much better for that. It's also a `cleaner signal`, but the FM transmitter has limitations on how much information it can carry.
Where can you get solution manual for analog and digital signal processing ashok ambardar?
you cant :(
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.
Can you replace a 2-30 trimmer capacitor with a fixed value capacitor?
Yes you can. But the variable one is used so that you can very the frequency and it cant be varied anymore if you use a fixed capacitor.
Why power amplifier are called as large signal amplifiers?
in general the CE amplifiers are called low-signal amplifiers as they use only small values of voltage as a source of input which cant be used in practical purposes, whereas power amplifiers deal with practical values of input and output voltages
Why you go for modulation?
modulating signal is the low frequency signal .so we cant transmit for a long distance.so we go for modulating the signal either by modulating the amplitude or frequency or phase of the signal.
If relation between frequency and distance is inversely praportional then why frequency cant be 0 to increase the distance?
Frequency has nothing to do with distance, the only reason frequency is sometimes associated with distance, is the length of one full RF cycle in the air, this is calculated with the following formula: wave length in meters = 300/frequency in MHz, that is say the frequency is 30 MHz (a frequency allocated to radio armatures) 300/30 = 10 meters that is then called the 10 meter band. This will then be the length of a balanced long wire antenna for that frequency or a 1/2 wave dipole will be 5 meters long. In the old days before FM, the radio bands was announced in meter bands where say 750 kHz was the 300/.750 = 400 meters. So if frequency = 0 then there is no signal and you can't divide by zero if one try to divide by zero on any calculator you will get an error message "cannot divide by zero".
In an FM receiver you use amplitude limiter but in am receiver you do not use frequency limiterexplain?
Because in radio communication a signal is specified by its frequency, In AM the carrier frequency is fixed.. we cant limit or manipulate it as it will might switch us to another carrier in the atmosphere... manipulating however amplitude (as in FM) doesn't switch us to another channel... so remember in radio communication signal is specified by its frequency whether FM or AM..
Why cant you get signal on your blackberry curve 8520?
no
What can light travel through that sound cant travel through?
light can travel through a vacuum whereas sound cant
Why do audio CDs have a frequency of 44.1 KHz if people can only hear up to 20 KHz?
The 44.1KHz frequency is the frquency of the 'sampling rate' With digital audio the original analog signal has to be 'sampled' ie measured. These samples measure the amplitude (strength) of the signal at that particular point in time. Since the analogue signal is constantly changing the sampling must be done continuously. The sampling rate must ALWAYS be higher than the highest frequency of the source signal, (otherwise it cant be measured). There was a bloke called Nyquist who postulated that the sample rate must be at minimum twice the highest frequency of the sample. This has been accepted as common practice now. This is where we get 44K (ie 44,000 measurements or samples per second), which is about double the 20K audio source.
What way can you travel in handball?
you cant travel with the ball
Why cant DNA travel to the cytoplasm?
it cant come out of the nucleus
Why AM travels more faster than FM?
AM and FM are methods of delivering signals embedded in a carrier frequency. There are many applications for them but they are best known for radio applications AM means amplitude modulation. In this technique, the amplitude or height of the carrier signal increases and decreases as the base signal changes. AM radio signals will travel great distances so a single transmitter can cover large areas. FM means Frequency Modulation where the frequency of the carrier signal increases and decreases to represent the change in voltage of the base signal. FM signals tend to offer better signal quality than AM but the range is far less, demanding multiple transmitters to cover the same area as one AM transmitter.
Do field biologists travel with there jobs?
No Cause they cant travel to jobs its travel to an ecosystem
How do you convert 3 earth years into light years?
you cant light years refer to the distance light can travel in 1 year 1 Light Year = 5878625373183.61 Miles
Why cant humans travel any farther than the moon?
Because of the distance and that there is no solid surface to land on.
