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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 Sound to noise ratio?
The signal-to-noise ratio (SNR) is a measurement used in audio engineering and telecommunications to refer to the ratio of the power of a signal (like sound) to the power of background noise. A high SNR indicates a high-quality signal with less interference from noise, while a low SNR indicates a weaker signal that may be harder to distinguish from background noise.
What is the significance of signal to noise ratio in spectroscopy analysis?
The signal-to-noise ratio in spectroscopy analysis is important because it measures the strength of the signal (useful data) compared to the level of background noise (unwanted interference). A high signal-to-noise ratio indicates a clear and reliable measurement, while a low ratio can make it difficult to distinguish the signal from the noise, leading to inaccurate results. Maintaining a high signal-to-noise ratio is crucial for obtaining accurate and precise spectroscopic data.
What is the significance of the signal to noise ratio in spectroscopy and how does it impact the quality of spectral data obtained?
The signal-to-noise ratio in spectroscopy is important because it measures the strength of the signal (desired information) compared to the background noise (unwanted interference). A high signal-to-noise ratio indicates a clear and reliable spectral data, while a low ratio can lead to inaccuracies and difficulties in interpreting the data.
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 key features affect the channel capacity?
Key features that affect channel capacity include bandwidth, signal-to-noise ratio, and modulation technique. A wider bandwidth allows for more data to be transmitted, while a high signal-to-noise ratio enables better accuracy in data transmission. The modulation technique used can also impact channel capacity by determining how efficiently the available bandwidth is utilized.
Peak-to-valley ratio in HPLC?
The peak-to-valley ratio in high-performance liquid chromatography (HPLC) is a measure of the separation between the highest peak and the adjacent valleys in a chromatogram. It is calculated by dividing the peak height by the lowest valley height around the peak. A higher peak-to-valley ratio indicates better resolution and a more efficient separation of analytes.
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 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 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.
