What is Fm: Definition and 113 Discussions

FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio. FM broadcasting is capable of higher fidelity—that is, more accurate reproduction of the original program sound—than other broadcasting technologies, such as AM broadcasting. Therefore, FM is used for most broadcasts of music or general audio (in the audio spectrum). FM radio stations use the very high frequency range of radio frequencies.

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  1. C

    Coulomb Potential Barrier: Is This Calc Right? What's fm?

    The Coulomb potential barrier of a system of two nuclei X and Y is approximately given by VC = ZX*ZY*e2/RN where ZX and ZY are the charge numbers of the nuclei, e2 = 1.44 MeV*fm, RN = (AX1/3+AY1/3) × r0 is the sum of the nuclear radii. r0 is a constant usually estimated to 1.2 to 1.3 fm and AX...
  2. ranger

    Discover New Music with Last FM and Pandora: A Scientist's Perspective

    Hey all, Anyone here a member of Last FM? Its a cool music social site where you can listen to their music stations (all genres) or pop your own CDs in your computer and listen and they tally your tracks. Some people have like 60,000 tracks :bugeye: and I thought I was crazy about music. If...
  3. D

    Comparing AM & FM Radio Transmissions

    Hey guys i was just doing a bit of poking around and i found this site. I was wondering if you lot could help me. You see i have to compare and contrast two types of similar communication. i chose AM/FM radio transmitions I know some of the bare basics like: They transmit by minipulating the...
  4. A

    Campus FM Radio or Community FM Radio

    Hi to all of you i am James i am researching about campus fm radio can anyone help me to to my research because i ask this moment i already gathered some information but i don't know how to start and can anyone give me some reference about this. thank you very much in advance.
  5. D

    Maximizing FM Radio Reception with a Satellite Dish: Is it Possible?

    Is there any way that I could rig an FM radio antenna to a satellite dish and pull in FM stations that are one or two hundred miles away?
  6. K

    MATLAB Matlab problem about AM and FM

    The question is like this: a.The amplitude modulation(AM)waveform in time and frequency domain. fm=20HZ,fc=500HZ,Vm=1V,Vc=1V,t=0:0.00001:0.09999 a.The frequency modulation(FM)waveform in time and frequency domain. fm=250HZ,fc=5KHZ,Vm=1V,Vc=1V,m=10,t=0:0.00001:0.09999 Then my program...
  7. D

    Finding Capacitance & Inductive Reactance for RLC Circuit in FM Broadcasting

    1. A RLC circuit is used in a radio to tune into an FM broadcasting station at 99.7 Mhz. The resistance in the circuit is 12.0 ohm, and the inductance is 1.40 uH (micro Henry) what capacitance should be used? this question is tricky what i tried to do is used XC=1/wC where C is capacitance...
  8. R

    Sink and Sources in Fluid Mechanics: Attraction, Repulsion, and Vortices

    Dear Friends, I have some questions about the efects of sink, sources and vortices. Both sink and source in fluids mechanics, are a region near a point that attracts or repels, for example, a particle. In the case of a vortice, in adition, a particle will be atract and approach towards the...
  9. S

    FM Transmitter Pspice Analysis

    Hello all, I am an Electrical Engineering student and I currently building a small, simple, FM Transmitter. I would like to be able to simulate this in pspice but I have had no luck. I can get a sinusoidal output, and gain, but no Frequency Modulation. Does anyone know of a good pspice...
  10. S

    Improving FM Radio Reception: Tips & Tricks

    How to improve FM radio reception? I have this boombox type radio in my room with one meter long telescopic antenna, reception is sometimes really bad. Should I just hook up length of wire to the antenna or what ? Thanks. :smile:
  11. Moonbear

    FM Radio Station on House Electric?

    Okay, I guess this falls into the electrical engineering category. Ever since I moved into my house, I've noticed this odd problem of picking up a particular FM radio station on my phone receivers as well as it bleeding through across ALL the FM stations. I only have this problem in my...
  12. J

    I am a scientist, I cannot provide a webpage title for this content.

    Ok A question here about how AM & FM modulation works. I know that AM trasmits the sound by varying the voltage of the radio signal, and FM varies the frequency itself of the signal, however, viable sound needs two things, varying frequency AND VARYING AMPLITUTE. So the modulation, whether FM...
  13. FZ+

    Mysterious Pulsing static on FM Radio - What is it?

    I'm not sure where to post this. On my FM radio (yes, I am pretty old fashioned), if you tune it to be slightly out of a station or if there is a weak signal or something, you can distinctly here a strange pattern of interference in the background. This consists of a rapid pulsing of white...
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