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There are 3 stages of an FM transmitter which allow you to transmit information over the FM band. These 3 stages need to be integrated into a single circuit to form what is known as a 3 stage FM transmitter
- A modulator circuit to add the information to be transmitted to the carrier wave produced by the oscillator. This is done by varying some aspect of the carrier wave. The information is provided to the transmitter either in the form of an audio signal, which represents sound, a video signal, or for data in the form of a binary digital signal.
- In an FM (frequency modulation) transmitter the frequency of the carrier is varied by the audio signal.
- An RF power amplifier to increase the power of the signal, to increase the range of the radio waves.
- An impedance matching (antenna tuner) circuit to match the impedance of the transmitter to the impedance of the antenna (or the transmission line to the antenna), to transfer power efficiently to the antenna. If these impedances are not equal, it causes a condition called standing waves, in which the power is reflected back from the antenna toward the transmitter, wasting power and sometimes overheating the transmitter.
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How can you make an electronic device that will buzz only if you separate it from the base unit to a distance after 3 meters probably work using frequency?
To create a device such as this one would chose a freguency is of a clear band width (avoid the upper frequency FM range) and mke the transmitter sufficiently weak that the signal would practically fade out in 3 meters. It is also possible to check the signal strength on the receiving circuit though this is prbably more sophisticated then need be as if you sufficiently under power, via gues nd check you should obtain the desired range.
How Frequency Modulation Have Higher Bandwidth then AM?
Bandwidth is defined as difference between two frequencies.In AM only amplitude is modulated or changed to transmit the data at the given fixed frequency. In FM the frequency of the signal is changed to transmit the data. Since we will need a range of frequency to transmit the data using FM (say frequencies from f1 to f2), the bandwidth of FM signal will be higher than AM signal which can transmit at a fixed frequency.But.....The above answer does not address the issue of "strength of modulation", that is, modulation index.A.M. will always have a bandwidth of twice its highest modulating frequency regardless of the strength of modulation.For voice comms with about a 3 kHz maximum frequency, A.M. will demand (3+3) = 6 kHz of bandwidth.Because F.M. modulates the frequency swing of the transmitter, low modulation indexes with F.M. can give a bandwidth LESS than the maximum modulating frequency. Narrow-Band F.M. (NBFM) can have a bandwidth of *less than* 3 kHz, indeed it can have a bandwidth of only a few hundred hertz, in theory.In practice, very narrow NBFM suffers from worsening signal-to-noise ratios, and one of F.M.'s chief advantages over A.M. is the superior signal-to-noise of F.M. when it is allowed sufficient bandwidth.
If your original central air conditioner was undersized at 3 ton but cools ok and you install a 3 ton two stage heat pump will the first stage be big enough to add in your basement or 2600 sf total?
The total tonnage is still 3. I would say no to 2600sf.
Int x2 - 3 dx?
-1
What is narrow band and wide band FM and How it can be generated?
In frequency modulation system, the maximum usable deviation be fixed +- 5 KHz and test deviation be kept 60% i.e. 3 KHz for wireless telephony systems used in military and other organisations. But wide band fm systems used in commercial broadcasts having frequency deviation +- 75 KHz.
What will be the affect if 1kpf capacitor is replaced by 1nf for 3 stage FM transmitter?
1 kpf (kilo pico farads) is equal to 1 nf (nano farads), so there would be no affect.
Does the mazda3 have an iPod jack?
I have a 2005 Mazda 3 2.3 Sport and it doesn't have an iPod jack. I've been using a FM transmitter
Why is AM modulation not an efficient way of modulation?
-- The power output stage in the transmitter must be operated either class A or class B. Whereas in FM the power output stage in the transmitter can operate class C which uses much less power per watt delivered to the antenna. -- For full modulation, audio power is required equal to 1/2 of the RF power of the transmitter output stage. -- At full modulation, 2/3 of the total power arriving at the receiver is at the carrier frequency, which conveys none of the information. -- A receiver designed for AM reception is susceptible to a wide variety of natural and man-made noise.
Does the new iPhone 4 have a FM transmittor?
No, but you CAN buy (~ $60) a transmitter which broadcasts on 3-5 frequencies which can be tuned on your car or other radio. That plugs into the headphone jack and is powered by battery or car. If you mis-wrote and meant to ask if it has a RECEIVER which would allow iPhone to tune and play FM radio the answer is no, however there are MANY excellent, free apps, which allow you to receive live radio via WIFI or 3G.
How can I connect my Ipod to my 2005 Mazda 3?
Easient way is with and FM transmitter, you plug this into the headphone connection on you ipod and then it sends out a radio signal, you just tune you car radio into the frequency adn your done, (fm transmitters can b got very cheaply...£5 or so from ebay) and there r 2 types battery powered: http://cgi.ebay.co.uk/FM-CAR-TRANSMITTER-WIRELESS-for-MP4-MP3-player-LCD-MP02_W0QQitemZ190150093390QQihZ009QQcategoryZ86532QQssPageNameZWDVWQQrdZ1QQcmdZViewItem or 12V ciggy lighter: http://cgi.ebay.co.uk/CAR-LCD-FM-TRANSMITTER-200-CHANNEL-for-iPod-MP3-Player_W0QQitemZ180159029052QQihZ008QQcategoryZ86532QQssPageNameZWDVWQQrdZ1QQcmdZViewItem you choice obviosly battery can b used anywhere in the car 12V is limited by lead, but 12V never runs out of power.
What is the electromagnetic radiation of 101.8mhz?
Wavelength = (3 x 108) / (1.018 x 108) = 2.95 meters (rounded)Intensity / field strength . . . depends on the FM station's transmitter output power and antenna pattern
I have a 1 watt FM transmitter.i want a suitable antenna for upto 3-4 kM range ..which antenna i will choose.and how to make that antnna?
hi, sorry for my english. for your 1 w fm transmitter to cover 3 to 4 km range. 1. choose a free and no noise frequency on your area Try (88.0 to 88.9mhz) exp. 2. make a dipole antenna correct measure for your frequency. 3. install your transmitter in water proof box and put it & the antenna on roof outside and your coaxial cable 1 foot max between the box and the antenna, you need from your room to the transmitter music signal and power cables. 4. ( optinal and not recommended ) if your transmitter take 6vdc to give you 1w connect it to 9vdc to give you 1.3w ( you have to protect your transistor output power & biger heat sink) .
What is the difference between a 2 wire and a 3 wire transmitter?
Output of two wire transmitter in mA and Output of two three transmitter in volt
What stage in the demographic transition model is Honduras?
I believe it's in Stage 3.
What is the symbol for fermium hydroxide?
This compound was not prepared; formulas will be Fm(OH)2 and Fm(OH)3.
What replaced the US Army FM 7-8?
The Field Manual FM 3-21.8 Infantry Rifle Platoon and Squad replaced FM 7-8.
Mechanism of neurohumoral transmission in ans?
1)synthesis and storage of transmitter 2)release of transmitter 3) Combination of transmitter with postjunctional receptors and production of postjunctional potential and initiation of postjunctional activity 4)destruction or dissipation of transmitter hope this is helpful
