what is stereo FM radio?
Do you know what is stereo FM radio? How does stereo FM radio work?
Fm broadcasts were originally mono only but along with the development of mono FM broadcast technology turned into stereo. The working principle of stereo FM radio is different from mono
In FM mono system there is no term L and R because the audio produced only one path is different from the stereo FM using Line L and R
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On the stereo FM will be felt effects such as bass voice on the left, drums dikanan, vocals in the middle, sometimes also the effect of moving the instrument from left to right and so forth
After you know about what is stereo FM radio then you must also know how does stereo FM radio work
how does stereo FM radio work?
most types of FM radio of antiquity is the type of FM mono. After the discovery of stereo FM system then the majority of people began to switch from FM Radio mono to stereo
Well when stereo broadcasts are introduced, there are rules that mono type radios should be able to capture stereo or mono broadcasts without modification
So, how does stereo FM radio work?
To overcome this the FM transmitter stereo channel L and R are not transmitted directly but transmitted is channel L + R (channel number), L-R signal (channel difference), as well as pilot signal as a controller that indicates the broadcast is transmitted is stereo broadcast
As already you know to change stereo sound to mono then it can be done by adding up the L + R channel
The L + R channel will be transmitted directly so that it is detected by all mono FM devices and refer to it as a single signal without Ldan R while the L-R signal modulates the 38-kHz sub-carrier, resulting in a DSB-SC signal (Double Side Band Suppressed Carrier)
By way of mono FM receiver has been able to receive FM radio mono and stereo
In stereo FM receivers to be able to receive FM stereo broadcasts required an enhancement called FM stereo encoder or stereo FM multiplexer
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In this article also admin Will share about how does stereo FM encoder work
How does stereo FM encoder work?
As you know, mono FM radio generates R + L signal for full R and L signals. well, to get a separate R and L stereo signal
The stereo FM encoder uses the principle of addition and subtraction matrices. A stereo FM encoder can be found on a stereo FM radio
How the stereo FM encoder works is to activate the matrix circuit when receiving the pilot signal and turn off the matrix circuit when the pilot signal is not received
How the stereo FM encoder works is as follows
To be able to receive the L signal then the matrix operation is done
In this way we will get the signal L with amplitude 2 times from the usual signal
As for receiving signal R matrix operation is done is
in this way the signal R will be obtained with an amplitude of 2 times the normal signal
The core of the working principle of stereo FM radio is to activate the matrix circuit when receiving the pilot signal so that the signal L + R and L-R can be separated into Signal L and Signal R
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