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Q. Commercial FM radio broadcasting?
Commercial FM radio broadcasting utilizes the frequency band of 88 to 108 MHz for the transmission ofmusic and voice signals. The carrier frequencies are separated by 200 kHz, and the peak frequency deviation is fixed at 75 kHz. Each station (out of the possible 100) broadcasts in a channel bandwidth of 200 kHz centered on the carrier. The FM system is capable of presenting higher quality audio to the user than AM because of the larger audio band allowed from 50 Hz to 15 kHz. Distortion at most stations is below 1%. Besides broadcast applications, FM is also used in satellite links, aircraft altimetry, radars, amateur radio, and various two-way radio applications. Because of the larger bandwidth (up to 20 times more than in AM), an FM system has more freedom from interference and better performance in noise than any AM station.
Q. Carrier Modulation by Digital Signals? Digitally modulated signals with low-pass spectral characteristics can be transmitted directly through baseband channels (having low-p
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A three-phase, wye-connected, 2300-V, 60-Hz, round-rotor synchronous motor has a syn- chronous reactance of 2 per phase and negligible armature resistance. (a) If the motor tak
Q. JFET Common Source Amplifier? The common source configuration for a FET is similar to the common emitter bipolar transistor configuration, and is shown in figure. The common
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Flex Routing : You can see that your labour will have been in vain unless you take steps to ensure that flexes are routed safely and well clear of possible sources of danger.
Q. J and K are the external inputs to the JKFF shown in Figure. Note that gates 1 and 2 are enabled only when the clock pulse is high. Consider the four cases of operation and expl
PUSH Instruction This instruction copies the contents of the specified register pair into the stack. The contents of stack pointer register are decremented by two. Th
Q. For the mechanical spring-mass-friction system shown in Figure, the differential equation relating the force F(t) and the velocity u(t) is given by where M is themass,D
(a) Evaluate whether the sinusoidal signal x(t) = A cos (2πf 0 t + θ) is an energy-type or a power-type signal. (b) Show that any periodic signal is not typically energy type, a
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