wat is fm jammer& its applications?
479044
A jammer is a transmission device that makes reception of a signal much harder by a receiver.  Unless specifically permitted by the FCC (which is very rare), jammer devices are illegal because of their intended purposes of disrupting communications.
37112
A pamphlet of scanner frequencies is usually available at the track, or you can check out this link:\n\nhttp://www.jayski.com/links/scanners.htm
1167272
You can buy a simple Radio Shack police/fire scanner. Essentially the same thing, but a much lower price.
151211
The voice / music is modulated (FM: Frequency or AM: Amplitude), once the signal is modulated it is amplified and trasmitted to an Antenna that amplifies the signal again in order to reach your radio device.\nYour radio take that signal from the air (it has been atenuated while travling in the air), de-modulate the signal and extract the voice/music to be amplified so you can listen what is being played at radio station...\nThis is the basics, but there are many things involved in a broadcast process...
143763
a signal emmited in the band of the 2 GHz.
207598
Check out the book "Starting and Operating Your Own Fm Radio Station: From License Application to Program Management" \n\nAvailable at Amazon.com - see link below
21863
It depends on what you would like to do. If you intend to use it on local repeater then  Tech clas License would do just fine. \nThere are different types of Ham radio license some require a morse code test and some don't. \nThe General Class License (my license) required a 5 word per minutes morse code tst, and allows me to operate on all band all modes (am, ssb etc)(with some frequency restriction).\nHam radio its aloto of fun and a great hobby.\n\nP.s: it is ilegal to broadcast music on Ham radio frequency!\n73 kc0lkv
697740
Try a FM Booster attached to the radio - I could never get a signal in my basement (It's a game room with pool table, darts, etc...So NEEDED tunes!), then hooked up a FM booster that I got at Radio Shack and it worked great!
995173
Use an RF Spectrum Analyzer to detect and locate any device emitting a radio signal.  Spectrum analyzers tend to be extremely expensive and might have a lengthy learning curve if you're not familiar with radio physics.  There might be cheaper ways, but I doubt there is any other way that is as reliable as a spectrum analyzer.
65252
High frequency radio waves. Around 1700 Mhz.
311539
Radio Shack sells FM frequency detector.  Since most listening devices work on FM frequencies, it should be pretty simple to locate.  You can also use a Near Radio Field Meter.
300474
I'll picture it for you...years ago when all the radios were AM Amplitude Modulation...when you drove under high voltage power-lines..you would hear static...with FM Frequency Modulation this will not happen..Higher Frequency.\n\nI hope this helped
665056
The basic components are:\n\nAn antenna (to "capture" the RF signal)\nA filter (LC circuit to tune to the frequency of interest)\nAn amplifier (to amplify the weak signal)\nAn FM demodulator (to downconvert and "decode" the FM signal and get back the baseband signal which is what our ears interepret as sound)\nAnother amplifer (make it variable so you can change the volume)\nA speaker\nOh, and of course the power supply (battery) to bias all the active components.\n\nI know you asked for a wiring diagram...but maybe try purchasing each of the above components seperately as modules and put the thing together... just do a google search... but congrads for trying to build an FM radio... It shouldn't be too bad... Make sure you have a bread board....
464204
A frequency oscillator.
40129
That's a big subject.  Analog or digital? U.S., Europe, Japan, Germany, Scandanavia, Germany, UK?  All use different systems.  Most use some form of spread spectrum technology, which makes them resistant to jamming.  A good reference is Peterson, Ziemer, and Borth, "Introduction to Spread Spectrum Communications", ISBN 0-02-431623-7.\n\nAlso, see http://en.wikipedia.org/wiki/Cell_phone_jammer\n\n\nFor U.S., "The FCC has fielded enough queries about the legality of cell phone jammers that it issued a notice last year. In it, the agency warns that jammers violate federal laws that broadly prohibit interfering with licensed radio spectrum. Owning, manufacturing, marketing, offering for sale or operating a cell phone jammer is punishable by an $11,000 fine and up to a year in prison for each offense, the notice states."\n\nFrom http://www.newhousenews.com/archive/story1a092200.html
239908
TRANSMITTER ,RECEIVER, ANTENNA COAX SWITCH, COAXIAL CABLE FOR ANTENNA, ANTENNA, ANTENNA STRUCTURE. 2 EACH. MAKE A SYSTEM.\n\nOR\n\nTRANSCEIVER , COAX , ANTENNA, ANTENNA SUPPORT! 2 EACH. MAKE A SYSTEM.\n\n\nTRANSCEIVER COULD BE FM, OR AM. AIRCRAFT USE AM FOR PLANE TO PLANE AND PLANE TO GROUND. POLICE , FIRE, UTILITIES AND MOST LAND MOBILE USE NARROW BAND FM. CB IS AM MODULATION. THE NEW CB IN HIGHBAND IS 900 MHZ FM THIS IS WHAT YOU CAN GET AT WALMART IN THE LITTLE WALKI-TALKIES! WITH A 6 MILE RANGE!\n\nA SYSTEM IS SYMPLY A SENDING STATION AND A RECEIVING STATION. IT CAN BE VERY COMPLEX OR AS SIMPLE AS A SET OF WALKIE TALKIES. A SYSTEM IS A FUNCTIONAL DEFINITON FOR SOMETHING THAT WORKS!\n\nA SYSTEM COULD REFER TO A SYSTEM THAT YOU USE AROUND YOUR HOME TO KEEP IN COMMUNICATION WITH YOUR FAMILY! OR IT COULD BE A SYSTEM THAT A BUSINESS USES TO STAY IN TOUCH WITH ITS EMPLOYEES! A SYSTEM IS JUST A FUNCTIONAL DEFINITION OF A OPERATIONAL "SYSTEM". IT IS THAT SIMPLE!\n\nHOPE THAT CLEARS THAT UP FOR YOUR!\n\n\nDO ME A FAVOR AND VOTE TO BREAK THE TIE ON YOUR QUESTION ON RADAR AS A DISTANCE FINDER IF YOU HAVENT CHOSEN A ANSWER YET SO THAT ONE OF US WILL GET OUR POINTS !\n\n\nTHANK YOU!!! \n\n\nSEE THE FIRST QUESTION!\nYOU ASKED THIS TWICE\n\nAPS\n\n\nhttp://answers.yahoo.com/my/profile;_ylt=AkNRDPHU4.dwE9DX6LQDRNgezKIX?show=AA10836052\nPOGI N POGI 88 YOU HAVE A PROBLEM YOU ARE NOT SELECTING THE ANSWERS!  YOU ASK QUESTIONS BUT DO NOT SELECT THE ANSWER! BECAUSE I AM SELECTING THE ANSWERS SO FAR FOR YOU ON YOUR QUESTIONS! ME! GET WITH THE PROGRAM! YOU ARE RUNNING OUT OF POINTS! SELECT THE BEST ANSWER YOURSELF! DO NOT LET IT HAVE TO GO TO VOTE! DO YOUR DUTY!  YOU HAVE NO POINTS THIS WEEK!  GET WITH THE PROGRAM!  IF YOU ASK QUESTIONS SELECT THE ANSWER OR DO NOT ASK!\n\nTHERE ARE WAYS OF TELLING!
905952
Commercial radio stations transmit signals using two types of schemes.....AM (Amplitude Modulation) and FM (Frequency Modulation).\n\nIn both types of schemes, the voice/music/audio is imposed upon what is known as the carrier wave. This carrier wave is generated at the radio station and has frequency within a certain portion of the range. For example FM radio stations typically have a range of 88 MegaHertz (Million Cycles Per Second) to 108 MegaHertz.\n\nSo, when your station changed from 93.9MegaHertz to 98.3MegaHertz, what they changed is the frequency of the carrier wave.\n\nThe music/voice/audio then is used to modulate (change) this frequency by a pre-determined amount.  Other radio stations are assigned carrier wave frequencies in such a way that two adjacent stations will not broadcast on top of each other.\n\nFor example, since your station now broadcasts on 98.3 MegaHertz frequency, the adjacent stations will be assigned frequencies of 98.5MegaHertz (above your station's frequency) and 98.1 MegaHertz (below your station's frequency).\n\nHope this helps.