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Why you use 455kHz frequency as an intermediate frequency in communication?
The intermediate frequency in the superheterodyne receiver is chosen as the desired compromise between sensitivity and selectivity. 455kHz is used in AM broadcast applications, while 10.7mHz is used for FM. The IF stage is tuned for a steep skirt passband at that frequency, allowing only the desired heterodyned (shifted) input signal to make it through to the demodulator.
What is IP3 and IM3?
IM3 degrades the sensitivity of the desired signal as an in band spurious frequency component. IP3 determines the severity of the degradation as a measurement through the linearity of the system.
What is sensitivity drift?
it is the amount by which instrument's sensitivity varies as ambient conditions change.
What is sensitivity of a potentiometer?
Sensitivity of potentiometer means~ smallest potential difference that can be measured with the help of it.
What causes sideband frequency?
If you subtract from the carrier frequency the frequency of the tone that modulates it, then filter out the carrier frequency, then you have a lower sideband frequency. If you add to the carrier frequency, filter out the carrier, then you have an upper sideband frequency.
At what frequency do rods have their peak sensitivity compared to cones?
Rods have their peak sensitivity at a lower frequency compared to cones.
A sensorineural hearing loss is most often associated with loss of hearing sensitivity in which of the frequency ranges?
high frequency sounds
What is the highest frequency sound wave an adult can hear?
An adult can hear up to 10 kHz, but it depends always on the level this frequency has. The sensitivity of hearing goes slowly down with age. If there is no level given in the question. the answer is really useless.
Can a moving coil loud speaker be used as a moving coil microphone?
Yes, but with vey low sensitivity and poor frequency response.
What is narrow band modulation frequency?
When the frequency sensitivity of the modulating signal is small,the bandwidth of the FM is narrow. The narrowband FM has one carrier term two sideband terms.The modulation index is also small compared to one radian.
How to trip a motion detector?
A: There are photo detector that sense changes in light as movement and there are frequency detectors that sense frequency shift as a person disturb the signal. Both are effective withing a certain range depending on environment and sensitivity. HOW TO TRIP IT IS UP TO YOU.
Why you use 455kHz frequency as an intermediate frequency in communication?
The intermediate frequency in the superheterodyne receiver is chosen as the desired compromise between sensitivity and selectivity. 455kHz is used in AM broadcast applications, while 10.7mHz is used for FM. The IF stage is tuned for a steep skirt passband at that frequency, allowing only the desired heterodyned (shifted) input signal to make it through to the demodulator.
How do Frequency and Pitch differ?
Although the response of the human ear varies from individual to individual and also changes with age, the range of hearing is 20 Hz with maximum sensitivity between 200-400hz. Pitch refers to the sensation of increase or decrease of frequency.
Can sound be perceived differently between younger and old people?
Yes, older people may have hearing loss or reduced sensitivity to high-frequency sounds, while younger people typically have better hearing sensitivity. This can result in differences in how sound is perceived between younger and older individuals.
What is the coverage distance of infrared rays?
Depends on the output power of the source, the frequency, the sensitivity of the receiver and the transparency/attenuation of the media the rays are travelling through - usually the atmosphere.
What is IP3 and IM3?
IM3 degrades the sensitivity of the desired signal as an in band spurious frequency component. IP3 determines the severity of the degradation as a measurement through the linearity of the system.
What is characteristics of LVDT?
1.Null Voltage 2.Resolution 3.Linearity 4.Sensitivity 5.Excitation voltage and excitation frequency 6.Dynamic response
