Since an FM transmitter transmits over the air usually with very low power, its quality is severely reduced by many large radio stations, not to mention even the smaller radio stations. FM transmitters are also prone to interference depending on weather conditions, topology, and landscape. You may start off with a good connection in one area, only to find it extremely distorted in the next suburb over.
An FM modulator, however, is a direct in line connection to your car stereo. The car aerial is disconnected, then the FM modulator connected direct to the Antenna Port, and then the car aerial reconnected again, but this time through the FM modulator.
It is a beautiful solution. It provides very high quality sound as you would expect from a commercial radio station. So if you had a choice between an FM modulator and an FM transmitter, consider the options! You may find for a little extra cost you have a stable, quality connection for in-car music needs. I just installed this FM Modulator and it is indeed a quality unit.
Hey Mario, So you still had to get to the back of the headunit to plug it in like you would a Grom. Does it integrate with the buttons you already have? Can you change tracks, answer calls or activate voice commands with your wheel or stereo? Distinguish between amplitude modulation and frequency modulation.
AM versus FM. Amplitude modulation. Frequency modulation. Full form. AM method of audio transmission was successfully carried out in the mids. Modulating differences. In AM, a radio wave is known as the "carrier" or "carrier wave" is modulated in amplitude by the signal that is to be transmitted.
Constant parameters. The frequency and phase remain the same. The amplitude and phase remain the same. AM has poorer sound quality, and a lower bandwidth but is cheaper and can be transmitted over long distances as it has a lower bandwidth that is why it can hold more stations available in any frequency range. FM is less affected by interference, but FM signals are impacted by physical barriers. They have a better sound quality due to higher bandwidth. Frequency range. AM radio ranges from to kHz or up to bits per second.
FM radio ranges in a higher spectrum from Bandwidth BW. BW is much less than FM. BW is large. Hence a wide channel is required. Bandwidth requirements. Bandwidth requirement is twice the highest modulating frequency. In AM radio broadcasting, if the modulating signal has a bandwidth of 15 kHz, then the bandwidth of an amplitude-modulated signal is 30 kHz. Bandwidth requirement is greater and depends upon the modulating.
Bandwidth requirement is twice the sum of the modulating signal frequency and the frequency deviation. As radio waves are in the form of sin waves, this wave can then be transmitted. Before transmission, the frequency of the wave has to be modulated so that it can be encoded onto the Carrier wave. This is done by the FM modulator. After modulation, the wave is transmitted or broadcasted by the transmitter circuit. The strength of transmission depends upon the power of the transmitter circuit.
Circuits with higher transmission capabilities can transmit signals at a higher range. The signals are transmitted in the frequency range of 88 to MHz, but the range of transmission depends on the capabilities of the circuit.
Apart from this, signal transmission is sometimes affected by environmental factors as well. Environmental conditions, static presence in the carrier wave, antenna height are some of the factors that affect the range as well as strength of the signal. In telecommunication, signal transmission depends upon the modulation and transmission-reception circuits.
The signal has to be properly modulated before transmission. Modulation is done with the help of a modulation circuit. Modulation basically converts the radio signal into a wave that can be transmitted through the Carrier wave. After modulating the wave, the signal is transmitted by the transmission circuit.
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