frequency shift keying?
93937
It is computer modem language:\n\nFor the modem to send bits of digital information in the form of 0's and 1's we need something called frequency key shifting. This is sent in wave form audio format. Now in order to get more information in and out we need to use a more modern method than just frequency key shifting thus came phase key modulation. Key phase came in and added timing delays and to designate a 0 or a 1. This allowed modems to make the transition to 9600 baud. Now in order to do even more we will add volume along with the mix. So now we have a modem that sends sounds in pitch, volume and even delay timing.
405837
You need to have recorded the power over a range of frequencies and ploted the Output over the Input. If the chirp signal can be extrapolated into its freqency components possibly you can compare the output to this, otherwise a new set of data points are required.
826878
All radio transmissions can be considered analog even the digital ones like FSK, PSk,QAM, since the carrier is sinsoidal which is analog, however the data are digital so they change the carrier characteristic in discrete way. in mobile systems such as GSM the type of modulation is GMSK (gausian minimum shift keying), which is a special type of FSK (frequency shift keying), in FSK the frequency of the carrier is alternating between two values, each frequency represents a logic state (digital), which can be processed by the mobile circuitry. again the FSK is an FM signal whith the message being digital (binary)
566130
It just is.  Many countries use 50 hertz.  It is one of the standard frequencies.   The US uses 60.
801165
go in the contol panel under keyboad and move the the easy touch buttom or repeating key silder
93949
Frequency 480 - 405 thz (terahertz)
150565
They are two ways of modulating a carrier wave to carry digital, i.e. binary, information.  In ASK the amplitude of the signal is varied between two levels to indicate a one or zero (on/off keying is a special case of ASK where one of the amplitudes is chosen to be 0).  In FSK the frequency is varied to indicate ones and zeros.  Both are applied in broadcast radio communications and wired data transmissions.  FSK is less suceptible to interference, like FM signals in general.
469894
hold down the shift key then press *extreme continuosly*\nthe key that misfire. repeat until youre satisfied
911903
Well, you could build a *relatively* simple circuit that simply cut the frequency in half, but then again, what kind of sensor are you dealing with?\n\nWhy do you want to tune it to a lower frequency? It is not simple to just shift a frequency, there are many things to take into account; input impedance, output impedance (both may be frequency dependent), signal amplitude, and required voltage swing.\nI would only attempt this if it was not a vital sensor I was messing with.
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.
445689
Radio shack has a book (about $20) that has every freq you could ever need in it , even your local #'s
523328
using jetaudio  \n\ndownload link\n\nhttp://jetaudio.en.softonic.com/ie/4376
39556
Heres a keyboard shortcut -\nALT + F4\n\nHope it helps \nTom
743893
Sometimes there are hidden keys.\n\nTry [Shift] + F4  (should be F16)
998173
This is a web page of frequencies. Not sure if it is current.\n\nhttp://mywebpages.comcast.net/sidearm5/freq7.htm
176344
Happauge TV/FM Tuner go herehttp://www.hauppauge.com/pages/support/support_pci_878.html#drv
548231
Find or build a jammer for frequencys above 820 and below 900mhz. Set the jammer to where the calls are made. Have a antenna wire run throughout the area. Good luck.