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Four signals, each having W = 3 kHz, are to be frequency-division multiplexed with 1-kHz guard bands between channels. The subcarrier modulation (modulation to accomplish the FDM) is AM, with one signal left at baseband. The composite FDM signal is then input to another AM modulator for transmission. Sketch the spectrum of the baseband FDM signal (use arbitrary shapes for the spectra of the 4 FDM'd signals) and the transmitted signal, and calculate the transmission bandwidth.
A square cross section, air filled toroid has Inner radius 12 cm. outer radius 14 cm. and thickness 2 cm. How many turns are required to produce an inductance of 1 mH
The fiber has a loss of 0.25 dB/km, and there is a splice with a loss of 0.1 dB every km. The coupling loss at the receiver is 0.5 dB, and the receiver uses an InGaAs APD with a sensitivity of -39 dBm. Find the system margin.
A system is described by the impulse response h(t) given in the following problems. Compute and plot the response of the system to the input signal x(t). (a) h(t) = t; 0
A rectangular pulse v(t) has a magnitude of 1.0 volts and duration 5 μs. The pulse is multiplied by a sine wave x(t) at a frequency of 2.0 MHz. a. Write down an expression for the spectrum of the signal y(t) = x(t) x v(t).
Sketch the appropriate equivalent circuit and phaser diagram and, assuming step-down operation, determine (a) the magnetizing current and the core-loss component of exciting current; (b) the exciting current; (c) the no-load power factor; (d) the ..
A summary of the nuclear reactions that power our sun can be written as 4p 4He + 2e-, with masses of 938.272 MeV/c2 for p, 3727.38 MeV/c2 for helium, and 0.511 MeV/c2 for electrons.
Which of the following is not an advantage of SPI transmission over SCI transmission Error checking via parity bit Faster transmission Master-slave capability Synchronous transmission A HCS12 embedded timer is in PWM mode.
Suppose that you wish to offer a voice over IP wireless service. The target packet error rate (or drop rate) is 10^-3 and you determine that if the signal is confined to within a coherence band, about 20% of the packets are dropped due to fading.
Discretization - How does the size of the differential charge elements influence your results Find E at the point (0, a/2, a), for this study. Devise a good way to represent your data to demonstrate the influence of discretization.
a boost converter operates at 20 khz, and converts power from a solar panel to a battery bus. the panel has norminal volate of 16v and current up to 3 A. the battery bus is 48 v. the transistor can be modelled as a 0.5 v constant forward drop.
A 10 kVA 1100:120 V single phase transformer has the following circuit parameters referred to the primary. Rc = 80 k Ohm, Xm = 10 k Ohm, Re = 20 Ohm, Xe = 50 Ohm. If the secondary load impedance is 5
Consider a zero-phase sine function, x(t), with frequency ?=1.3rad/sec. What is the minimum positive time shift needed to turn this function into a zero-phase cosine of the same frequency
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