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Why Intermediate frequencies is selected always a difference between two mixing frequencies?
In the frequency domain, if you add two sinusoidal waves to each other, you see four peaks. You have the two input frequencies, you have the sum, and you have the difference. Since the purpose of the Intermediate Frequency in the Superheterodyne design is to move the signal down to a more manageable frequency domain, i.e. one with fewer design challenges, we pick the difference.
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Why two frequencies are used in dtmf?
The tone frequencies, are selected such that harmonics and intermodulation products will not cause an unreliable signal. No frequency is a multiple of another, the difference between any two frequencies does not equal any of the frequencies, and the sum of any two frequencies does not equal any of the frequencies.
What does is the difference between highlighted text and a selected text?
There is no difference both are highlighted and selected.
Difference between expenditure on final goods and expenditure on intermediate goods?
The difference between intermediate goods and final goods is in their nature. Intermediate goods are finished goods which can be used to make other good like wool. The final goods are sold to consumers like a woolen coat.
What is the difference between the colours of visible light?
their wavelengths (frequencies)
Difference between channel and bandwidth?
a channel is actually a path through which a signal of a particular frequency travels and bandwidth is the capacity of that path it tells about the number or range of frequencies which a path can carry
What is the main difference between andesite and diorite?
Both are igneous rocks of intermediate coposition.
What is the difference between r selected and k selected species?
R- Selected species have high population densities while k-selected species have lower population densities
What is difference between intermediate mass star and main sequence stars?
i don't think so
What do you hear when two almost identical frequencies are sounded together?
You hear 'beats', or pulses, and these pulses happen at a frequency which is the difference between the frequencies of the nearly identical tones.
What is the difference between intermediate and college algebra?
it almost the same but they make the theory more complecated and chalanged
What is difference between alignment and indentation?
Indentation= selected area Alignment= first line of a paragraph
What is the main difference between radio wave and a light wave?
The difference is their wavelengths. That means that their frequencies are different, and also the amount of energy carried by each photon.
