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Sunday, September 4, 2011

err..AM? FM?

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It's always pass by in my mind. the AM radio? the FM radio? err -.- i really not sure.
since i always heard that we have Hitz.fm, Era fm and Hot fm. but rarely heard about AM radio.
According to thedifferencesbetween.net, *click for extra info :)


"AM is the older an easier of the two technologies to implement. The receiver detects the changes in the carrier frequency’s amplitude and amplifies it to drive a speaker. The simplicity of the technology made it easy to build radio receivers in great quantities. The main problem associated with AM broadcasting is the fact that it is very susceptible to various weather conditions that deteriorate and distort the signal. The simplicity of the design also limits the broadcast to a single audio channel, making it inadequate for stereo sound."
"FM is a development over AM broadcasting and it provides a lot of substantial benefits thus it is much more complex compared to AM. The first and most substantial benefit is its ability to send out two channels of information at the same time with the use of advanced algorithms. This allows the station to broadcast left and right audio channels for full stereo sound. Since most environmental factors that distort radio waves only affect its amplitude and not the frequency where FM stores the actual voice signal, the data in the FM signal doesn’t degrade as easily as AM. This also means that FM signal quality doesn’t degrade linearly as you get further from the transmitting station."

it can be summaries that;
1. AM broadcasting is simpler than FM but the difference in complexity and price are very marginal at present.
2. AM is more prone to signal distortion and degradation compared to FM.
3. FM doesn’t degrade linearly with distance.
4. AM usually broadcasts in mono which makes it sufficient for talk radio.
5. FM can transmit in stereo making it ideal for music.
6. AM has a longer range than FM
Now, i really understand why my most-of-the-time-favourite-radio-station, Hitz.fm has 'fm' at the back.

One of the rarely heard about AM radio is Voice of Malaysia  station owned by RTM.
The main target of Voice of Malaysia is to portray to an overseas audience true images of Malaysia, from the perspective of the political and social benefit and to encourage foreign investment in Malaysia. It also airs local art, crafts, customs, culture and festivals to encourage people to travel to Malaysia.


that is means, AM radio has the longer waves that can be transmitted most of the countries in the world. 


by the way, lets enjoy one of the parody made by my favourite Hitz FM Morning Crewww :D



anyway, tomorrow is monday. haha :)



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