5.6 Find the frequency spectrum of x[n] = x(nT) = 0.8", for n ≥ 0 and T = 0.2. Compute its values at = mx, for m = 0: 5. Use the values to sketch roughly its magnitude and phase spectra. Is it a low- or high-frequency signal? Problem 2: Chapter 5, Problem 7 5.7 Repeat Problem 5.6 for x[n] = x(nT)=(-0.8)".

Identify all the TRUE statements below. A) At resonance, there is no voltage drop across the individual reactive elements of the circuit._ B) At resonance, there is no net voltage drop across all the reactive elements of the circuits. C) To minimize the impact of capacitance in an AC series circuit, set its value close to zero. D) To minimize the impact of inductance in an AC series circuit, set its value close to zero. E) At resonance, Xc and XL are always zero. F) At resonance, Xc = X_ and can be very large. G) Decibels on the magnitude axis of the Bode Plot represent voltage gain (or loss). H) Decibels always represent power gain (or loss) which is the square of the voltage gain (or loss)._

RLC Series AC Circuits• Calculate the impedance, phase angle, resonant frequency, power, power factor, voltage, and/or current in a RLCseries circuit.• Draw the circuit diagram for an RLC series circuit.• Explain the significance of the resonant frequency.

(7 (6) Find the low frequency response by determining poles due to each coupling and hypass capacitor (CE, Cin & Cont). Ignore to for the BJT. 2/5 + Ps M Cin Vcr R₂ Vcc T R₂ Cont " ERL Vout

If the carrier signal is Vc (t) = Ve Sin (Wst). And the information signal is used to generate AM wave Vm (t) = Vm Sin (t), the AM Bandwidth is equal to 12 KHz, modulation index m = 0.5 and the spectrum frequency for AM is shown figure: 6 6 -100-6fm -100 -100+6fm 100-6fm 100 100+6fm KHZ | 1- determine Ws. Wm, fm. f. 2- draw the AM wave in time domain 3. determine Vm. Vc 4-determine the power at carrier of the antenna resistance one ohm (1 2) 5- Write the AM equation with all values.

Design (only the block diagram) an Armstrong indirectly FM modulator to generate an FM carrier with a carrier frequency of 98.1MHz and df (frequency deviation) =75kHz.A narrowband FM generator is available at a carrier frequency of 100 KHz and a (frequency deviation) df=10Hz.The stockroom has an oscillator with an adjustable frequency in the range of 10 to 11MHz.There are plenty of Frequency multipliers.

If the carrier signal is Vs (t) = Ve Sin (Wst). And the information signal is used to generate AM wave Vm (t) = Vm Sin (t), the AM Bandwidth is equal to 10 KHz, modulation index m = 0.6 and the spectrum frequency for AM is shown figure: 4 -100-5fm -100 -100+5fm 100-5fm 100 100+5fm KHZ 1- determine Ws. Wm, fim. f. 2- draw the AM wave in time domain 3. determine Vm. Vc

Identify all the TRUE statements below. A) At resonance, there is no net voltage drop across all the reactive elements of the circuits. B) To minimize the impact of capacitance in an AC series circuit, set its value close to zero. C) To minimize the impact of inductance in an AC series circuit, set its value close to zero. D) At resonance, Xc and XL are always zero. E) At resonance, power is maximized and phase shift is zero. F) At resonance, X = XL. %3D G) At resonance net reactance is zero. H) Capacitance is the measure of how difficult it is to store charge for a given voltage. The higher the capacitance, the more voltage it takes to store charge on it. F hp H. B. C. E.

(d) With the aid of well-labeled waveform diagrams, explain Amplitude Modulation Frequency Modulation Phase Modulation (e) A FM modulator produces a frequency deviation of 45 KHzwhen a modulating signal with frequency of 15 KHz and a carrier signal with amplitude 20Vand frequency of 300 KHz is mixed in the modulator. Determine: The minimum bandwidth from Bessel function table. The approximate minimum bandwidth using Carson's rule. (f) An FM wave is represented by the voltage equation: e = 12 sin (6 x 10°t + 5 sin 1250t). (1) Determine the carrier (ii) The modulating frequencies (ii) The maximum deviation of this FM wave (iv) What powerwill this FM wave dissipate in a 1022

For the system given constant coefficient difference equation: ylnl-2.5yln-11+yln-2]=2x[n]+0.5x[n-1] Find the frequency response. And plot the amplitude response for the different sample frequency points you will choose.