Factors determine the bandwith of frequency modulation required?
413847
In FM transmission, the intelligence to be transmitted causes a variation in the instantaneous frequency of the carrier either above or below the center frequency. The detecting device must therefore be constructed that its output will vary lineraly according to the instantaneous frequency of the incoming signal. Also, since the detecting device is sensitive to amplitude variation produced by intereference of by receiver nonlinearities; a special limiting device, called a limiter, must precede the FM detector. Several types of FM detectors have been developed and are in use, but two of the most common types are the Foster-Seely discriminator and the ratio detector. The discriminator requires a limiter, which in turn requires considerable amplification ahead of its input.
916828
ok..u have for main categories of filters..\n\nlow pass (allow lower freq)\nhigh pass (allow higher freq)\nband pass (only allow a small band of freq)\nband stop (allow everything but a small band of freq)\n\npassband is a term used to describe the frequency portion of the filter where the signal goes through unattenuated (i.e. it isnt stopped).\n\nstopband is a term used to describe the frequency portion of the filter where the signal is attenuated (i.e. stopped)..\n\ngl with it..
253517
should be able send signals with minimum (atenuations)loss of signals;\nshould have a high transmission speed-Bandwith;\nAccessibility and reparable;\nproduces what enters from the begining at the end;
170112
tricky question....\nso i will pretend that the answer is here....http://www.jr2.ox.ac.uk/bandolier/band112/b112-2.html
200277
Are you asking for the mathematical representation of a frequency modulated signal (FM)?  If so, it is:\n\nXc(t)=Ac*cos[omegaC*t + fDelta*X(t)]\n\nWhere t is time, Xc is the the modulated carrier, Ac is the amplitude of the carrier, omegaC is the frequency of the carrier (in radians per second), fDelta is the modulation index (amount of frequency change allowed), and X(t) is the message.\n\nSee chapter 5 of reference in "source(s)".
556680
http://en.wikipedia.org/wiki/Modulation_index
422440
the wavelength is half...\n\nvavelength and frequency are inversely proportional
802418
Depends on what sort of frequency you are working at and how much inductance you want ; if it's a fairly low frequency RF you might put a little air-coil in as an inductor or just a single loop, maybe arrange for some mutual inductance between a pair of loops if your impedance matching network relies on a transformer.\nCould be something else of course but this is my best guess based on the information you have given.
597420
Pitch and frequency are directly related (directly proportional) and inversely proportional to wavelength.\n\nAmplitude is another property though and is related to loadness.
867362
wavelength*frequency=c\n\n3.04667 m
359870
for analog transmission, wave form\nfor digital transmission, on and off bits
572837
RTFM\nRead the fricken Manual.
373020
They are both ways of putting information on a bigger pipe.\n\nFor modulation, you modulate a carrier frequency with a signal.\n\nMultiplexing involves taking multiple signals and placing them on the same baseband to carry them.\n\nThat isn't much of a similarity, though.  I guess the other one would be that you can have either digital or analog modulation and you can have either digital or analog (FDM) multiplexing.
197001
a Scanner\n\nMost can be programmed for a several different frequencies which you then scan. Or you can set it for scan all frequencies between two.\n\nThe Federal govt. FCC has dictated frequency bands for certain functions. Scanners cover the non-broadcast radio bands between 30 and 950 MHz.
314002
You can set the band of your radio to SW or short wave. Start tuning. You will get many international channels. The clarity will be poor though. Satellite radio is the best.
962245
Hi. All de-codable signals modulate something. Amplitude or signal strength, frequency, or phase. In FSK, two frequencies are chosen and the signal changes from one to the other. This change, or shift, is used to carry the signal. Hence FSK. Found this which may help. : http://www.answers.com/main/ntquery?s=frequency%20shift%20keying&gwp=16
98829
rf modulator.\nhttp://www.radioshack.com/search/index.jsp?kwCatId=&kw=rf%20modulator