Before buying a professional FM broadcast transmitter, you may see many complicated parameters in a large list of transmitters. One of the important parameters is called SNR. So what is SNR and why is it important? What does SNR mean for broadcast transmitters? The following content can provide you with some useful information. Keep exploring!

Content

• What Is Signal to Noise Ratio? Why It Is Important?
• Example of Signal to Noise Ratio
• Conclusion
• Frequently Asked Questions

What Is Signal to Noise Ratio? Why It Is Important?

SNR or S/N is the abbreviation of signal-to-noise ratio. As a measurement parameter, it is widely used in the fields of science and engineering. In wireless communication, SRN refers to the measurement of decibels (dB), which is also a signal. The numerical comparison of the power level and the noise power level.

When the SNR value of a professional broadcast transmitter is higher, it means that the broadcast transmitter is of higher quality. Why? Because the larger the SNR value of the broadcast transmitter, that is, the greater the ratio of the signal power level to the noise power level, means that your broadcast transmitter will get more useful information instead of more noise. When the ratio of SNR When it is greater than 0 dB or higher than 1:1, it means that there is more signal than noise. On the contrary, when the SNR is less than 1:1, it means that there is more noise than noise.

You can also find SNR specifications in many audio-processing products, including speakers, phones (wireless or other), headphones, microphones, amplifiers, receivers, turntables, radios, CD/DVD/media players, PC sound cards, Smartphones, tablets, etc. However, not all manufacturers know this value clearly.

Actual noise is usually characterized by white or electronic hissing or static or low or vibrating hum. Turn up the speaker volume without playing; if you hear a hiss, it is noise, which is often referred to as "noise floor." Just like the refrigerator in the previously described scene, the background noise always exists.

As long as the incoming signal is strong and much higher than the noise floor, the audio will maintain a high quality, which is the preferred signal-to-noise ratio for obtaining clear and accurate sound.

Now suppose that the desired signal is basic data with strict or narrow error tolerance, and there are other signals that interfere with your desired signal. Likewise, it makes the task of the receiver to decrypt the required signal exponentially more challenging. In short, this is why it is important to have high signal-to-noise. In addition, in some cases, this may also mean differences in equipment operation, and in all cases, it will affect the performance between the transmitter and receiver.

In wireless technology, the key to device performance is that the device can distinguish the application signal as legal information from any background noise or signal on the spectrum. This summarizes the definition of the standard SNR specification used for the setup. In addition, the standards I'm referring to also ensure proper wireless functionality.

Example of Signal to Noise Ratio

Although there are many methods to measure the sensitivity performance of radio receivers, the S/N ratio or SNR is one of the most direct methods, and it is used in various applications.

The concept of the signal-to-noise ratio is also used in many other fields, including audio systems and many other circuit design fields.

The signal-to-noise ratio of the signal in the system is easy to understand, so it has been widely used in many fields.

However, it has many limitations. Although it is widely used, other methods are often used, including noise figures. Nevertheless, the S/N ratio or SNR is an important specification and is widely used to measure the performance of many RF circuit designs, especially the sensitivity of radio receivers

The difference is usually expressed as the ratio of signal to noise S/N, usually expressed in decibels. Since the signal input level obviously has an effect on this ratio, the input signal level must be given. This is usually expressed in microvolts. The specific input level required to provide a signal-to-noise ratio of 10 dB is usually specified.

If the signal happens to be weak, you may think that the volume needs to be increased to increase the output. Unfortunately, adjusting the volume up and down will affect the noise floor and signal. The music may become louder, but the potential noise will also become louder. You only need to increase the signal strength of the source to achieve the desired effect. Some devices have hardware or software elements designed to improve the signal-to-noise ratio.

Unfortunately, all components, even cables, add a certain level of noise to the audio signal. The best components are designed to keep the noise floor as low as possible to maximize the ratio. The signal-to-noise ratio of analog devices such as amplifiers and turntables is usually lower than that of digital devices.

For wireless systems, your sound quality depends largely on achieving the highest signal-to-noise ratio. In order to achieve high SBR, we need to know the cause and type of noise in question. "Noise" refers to any type of competitive signal interference in the physical space-unwanted tones, static, or even other frequencies. If you use a wireless microphone, your noise may also be the result of channel noise during FM. "FM", because all analog wireless systems use frequency modulation to transmit audio signals. An integral part of the FM process is the capture effect: the wireless receiver will always demodulate (convert to audio) the strongest RF signal at a given frequency, including sounds you don't want.

Conclusion

This reminds us that when buying professional broadcast transmitters, we can use the absolute value of the SNR ratio as one of the reference electrical indicators, but it is not recommended as the only indicator. Other professional electrical indicators such as frequency response and harmonic distortion should be included in the reference. Scope. If you don't know how to choose the best FM radio transmitter, please contact FMUSER, we are a first-class professional radio station equipment manufacturer.

FAQ

1. What is the Signal to Noise Ratio in FM?

For the SSB-FM signal plus narrow-band Gaussian noise at the input (where the input SIGNAL TO NOISE RATIO is larger), the signal-to-noise ratio (SIGNAL TO NOISE RATIO) at the output of the ideal FM detector is determined as a function of the modulation index.

2. What is the Signal to Noise Ratio in RF?

The pre-phase increases the amplitude of the higher signal frequency, thereby improving the signal-to-noise ratio...When the FM improvement factor is greater than 1, the SIGNAL TO NOISE RATIO improvement always comes at the cost of increasing the bandwidth in the receiver and transmission path.

3. What is the Signal to Noise Ratio in RF?

Signal to Noise Ratio (SNR) is actually not a ratio, but a decibel (dB) value that is used to measure the difference between signal strength and background noise. For example, the signal strength is -56dBm, the noise is- 86dBm, and the signal-to-noise ratio is 30dB. The signal-to-noise ratio is also an important factor that needs to be considered during the deployment process.

4. Why FM has a better Signal Noise Ratio?

FM has Noise reduction. For example, compared to AM, FM provides a better signal-to-noise ratio (SIGNAL TO NOISE RATIO)... Since the FM signal has a constant amplitude, the FM receiver usually has a limiter to eliminate the amplitude modulation noise, thereby further improving the signal-to-noise ratio.

5. Why is the Signal to Noise Ratio important?

Noise performance and signal-to-noise ratio are key parameters of any radio receiver... Obviously, the greater the difference between the signal and the unwanted noise, that is, the greater the signal-to-noise ratio or signal-to-noise ratio, the better the sensitivity performance of the radio receiver.