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Signal to noise ratio is the difference between the noise floor and the reference level.
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∙ 14y ago
Wiki User
∙ 14y agothe lower the better
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What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
Why the received signal in analog communication is distorted by the channel noise than that of digital communication?
If an RF signal is AM modulated with a analogue signal any noise will add or subtract to the amplitude of the RF signal and will be present in the audio signal after detection, also will the noise add itself to the audio signal, where as in digital communication a slight variation in the amplitude of the signal is of no concern because you only work with ones and zeros, it's high or it's low
Why high frequency signal is more affected by noise compare to low frquency signal?
AS FREQUENCY INCREASE THE BANDWIDTH INCREASE. AS WE KNOW NOISE HAVE LARGER BANDWIDTH. SO ITS AFFECT HIGH FREQUENCY SIGNAL. BUT LOW FREQUENCY SIGNAL HAVE LOW BANDWIDTH SO IT IS LESS AFFECTED BY NOISE. ALSO WE KNOW QUALITY FACTOR= CUTOFF FREQUENCY / BANDWIDTH. SO AS FREQUENCY INCREASE B.W. INCREASE SO QUALITY DEGRADE. CUTOFF FREQUNCY AND THE TERM FREQUENCY (USED HERE) IS DIFFERENT. CUTTOFF FREQUNCY IS USED IN FILTER. PRABIR KUMAR SETHY prabirsethy.05@gmail.com
What is equipment noise?
Electronic devices often emit a high pitched low volume squeel. This is often the result of transformers or capacitors as current passes through them. Alternatively, this may be signal interferrence in signal waves.
Why instrumental amplifiers have high CMRR?
That way they can filter noise (assumed to be common on both input terminals) and extract the signal even if it's relatively weak.
What is a good type of network cable for a computer?
Category 5e is a good type of network cable for a computer. They have a high signal-to-noise ratio.
What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
I'm a professional songwriter/composer.What soundcard is most reliable for my needs?
Any high-end Turtle Beach sound card will provide an excellent SNR (Signal-to-Noise Ratio).
How do you improve signal noise ratio?
A nice question. Well, we can reduce the noise or we can increase the signal. We assume you are using components that are inherently low noise in themselves.Consider a passive antenna. A simple dipole will have a broad directional receiving pattern, but your signal is coming from only one direction. So by converting to a directional antenna, such as a Yagi antenna, or a parabolic dish, you can narrow the receiving direction(s) to cover only a few degrees, rather than over 100 degrees. Thus a Yagi antenna may be described as having a gain of 20dB. That is not real gain in signal strength, just a gain in signal-to-noise ratio.Similarly tricks are available with electronics. The ingenious Mr Dolby has given us a method whereby we divide our signal band into several segments. If at a given moment there is no signal in one segment, then that is not amplified, whereas the segments in which there is signal, are amplified. Only practicable with high speed electronics, but they are available - so go for it.And again with broadband noise degrading our signal. If the same noise signal is present at bands adjacent to that of our interest, then if we cancel that moment of signal on all bands, we may improve our signal to noise ratio. This trick is used in cleaning up 'pops' from scratches on vinyl records. The momentary loss of signal is less troublesome than the presence of a pop. High speed electronics to the rescue again!As so strengthening the signal itself, simple amplification or reduced bandwidth are approaches that produce results.
Why the received signal in analog communication is distorted by the channel noise than that of digital communication?
If an RF signal is AM modulated with a analogue signal any noise will add or subtract to the amplitude of the RF signal and will be present in the audio signal after detection, also will the noise add itself to the audio signal, where as in digital communication a slight variation in the amplitude of the signal is of no concern because you only work with ones and zeros, it's high or it's low
What is common mode output voltage?
I assume you're referring to an amplifier circuit. In a differential amplifier, there are two inputs. The common mode output voltage is the output voltage that will result from the same voltage being applied to both inputs. Typically this is very low, as the common mode rejection ratio (CMRR) is very high in a differential amplifier. This is an ideal characteristic (high CMRR) as it means unwanted noise will not be amplified and potentially squelch out the desired signal; this is why a differential amplifier is used in high quality sound equipment. Three wires are used - a ground, and two signal wires that are opposite each other. Noise will inherently "hop on" the signal wires, but as they are close to one another, it is likely the noise will be nearly the same magnitude and sign on each wire. Since the amplifier CMRR is high, this noise does not propogate through the amplifier, while the original signal is amplified.
What is common mode voltage?
I assume you're referring to an amplifier circuit. In a differential amplifier, there are two inputs. The common mode output voltage is the output voltage that will result from the same voltage being applied to both inputs. Typically this is very low, as the common mode rejection ratio (CMRR) is very high in a differential amplifier. This is an ideal characteristic (high CMRR) as it means unwanted noise will not be amplified and potentially squelch out the desired signal; this is why a differential amplifier is used in high quality sound equipment. Three wires are used - a ground, and two signal wires that are opposite each other. Noise will inherently "hop on" the signal wires, but as they are close to one another, it is likely the noise will be nearly the same magnitude and sign on each wire. Since the amplifier CMRR is high, this noise does not propogate through the amplifier, while the original signal is amplified.
What is better a high or low sortino ratio?
A high Sortino ratio is better than a low Sortino ratio. That's because a high sortino ratio implies low downside volatility compared to the expected return. There's a guide to the Sortino Ratio at the related link, together with an Excel spreadsheet
What is the quality of a signal?
The quality of a signal is a measure of how much the signal has changed during transmission. A high quality signal has changed very little. A low quality signal has other information in it which was not there in the original signal. The additional unwanted information is called noise.
What is CMRR of differential amplifier?
CMRR stands for Common Mode Rejection Ratio, and it is a measure of how well the amplifier rejects signals that appear on both leads. The idea is that an amplifier should amplify the (Differential Mode) signal, but not any noise (Common Mode) that might appear on the lines, perhaps due to induction from nearby AC power sources. Since induction will show up on both leads, a high CMRR amplifier will have a greater signal to noise ratio overall
Why noise immmunity is more in integrator than differentiator?
noise is a ac signal(high frequency range), as LPF allows only lower frequencies integrator is has more noise immunity than differentiator
What is the difference between mono polar and bipolar electrode?
Monopolar electrode is single electrode measure voltage with respect to grond ,but bipolar electrode is two electrode measures the diff. voltage mainly bipolar is used inorder to get high Signal to Noise ratio.
