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Explain Acceptance cone?
The fibre air - core interface is display below:
In this figure Omax is the maximum angle, inside that the rays undergo total internal reflection and propagate by the fibre. The rays along with angle greater than Omax is do not obey the total internal reflection, these rays eventually lost by radiation. Therefore we have an acceptance cone as display below along with conical angle of 2 Omax.
The angle Omax is known as acceptance angleOmax = sin- [(n12 -n22)]1/2 (suppose that the outer medium is air)
Define Sampling Frequency? Since real analog signals consist of several frequencies, spectrum of the input signals should be limited to make sure that no signal energy exists a
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define
CPU Based Exchange: In centralized control, all control equipment is replaced by a single processor which should be quite powerful. It should be capable of processing 10 to 100 c
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