2. A 3 KHz sinusoidal signal Phase Modulates a carrier at 245.3 MHz. The modulating tone...
14. Given a sinusoidal modulating signal with frequencies f," 10 kHz and a carrier signal of 100 MHz, determine the bandwidth of FM for the three cases (amplitudes: 1. 10, 100, 1000) when the maximum frequency deviation is 50 kHz and k,-2? × 100 rad/sec/volt.
The sinusoidal modulating wave is applied to a phase modulator with phase sensitivity kp. The unmodulated carrier wave has frequency fc and amplitude Ac. a) Determine the spectrum of the resulting phase-modulated signal, assuming that the maximum phase deviationP4es not exceed 0.3 radians. b) Construct a phasor diagram for this modulated signal, and compare it with that of the corresponding narrow-band FM signal. The sinusoidal modulating wave is applied to a phase modulator with phase sensitivity kp. The unmodulated carrier...
[20 pts] Problem 6) A signal m(t)-2cos(2 103 t) phase modulates (PM) an 8-Watt, 1 MHz carrier to produce a (peak) frequency deviation of 4 kHz. Write the time-domain expression for the resulting PM signalppM (t)? What is the value of the phase deviation constant kp? What is the bandwidth of the PM signal?
QUESTION 12 Calculate the amplitude of the modulating signal (in volt) if you have the following information about the spectrum of single tone NBFM: the magnitude spectrum of the carrier component -8.34, the absolute value of the magnitude spectrum of the side components - 0.9737, the bandwidth of the NBFM signal - 3.6kHz, and the frequency sensitivity factor -0.46 kHz/v. 0.3655 0.9137 1.0964 1.2792
A single tone message signal, m(t) = 2 cos(211 X 1000 t), (freq. is in Hz) is applied to an FM modulator with the following parameters: Amplitude of the Carrier = 10 (V), Carrier Frequency = 100 (kHz), Frequency sensitivity factor = kx = 103 (Hz/Volt). The modulated signal s(t) is passed through a bandpass filter centered at 102 (kHz) with a bandwidth of 3(kHz), and the output signal sf(t) is obtained. (a) Express the output of the filter, sf(t)...
A 105-MHz carrier is to be frequency modulated by a 3-kHz tone. The maximum frequency deviation is to be adjusted to 45 kHz. If the peak amplitude of the carrier is 40 V, write an equation for the function. 7-12 A 105-MHz carrier is to be frequency modulated by a 3-kHz tone. The maximum frequency deviation is to be adjusted to 45 kHz. If the peak amplitude of the carrier is 40 V, write an equation for the function. 7-12
1 2 4. The amplitude modulation signal is given by the following expression and is applied to 75 load. Vam(t) = 10 sin (21fct) - 2.5 cos (1500krt) + 2.5 cos (1450krt) V Determine: a) Modulation index b) The frequency of the carrier and the information signal c) The bandwidth d) The total power e) The transmission power efficiency be ar e 5. One of the inputs to a frequency modulator is a 250 kHz carrier signal with amplitude of...
A 1.5 MHz carrier frequency is amplitude-modulated by a 200 kHz sinewave audio signal. The bandwidth would be A. 40 kHz. B. 405 kHz. C. 4,000 kHz. D. 400 kHz.
a. In FM transmission circuits, explain the purpose and function of: i. Pre-emphasis and de-emphasis circuits. (CO1: PO1 - 3 Marks) ii. Limiter circuit. (CO1: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency fe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure Q2(b) and the Frequency Deviation Constant of the FM Modulator, kf = 107 Hz/volt. Determine the minimum bandwidth required for transmission of the...
1) Given that the frequency deviation constant &t is 5 kHz/volt, what is the required amplitude of the modulating signal such that Jo(β value of B for this case? Note in 2kHz. 0? What is the What are the values of the Bessel Coeficients when Jo(8-0 ? 1.e. the first five sidebands. Plot the spectrum assuming that the unmodulated carrier has an amplitude of 2V State Carson's rule for banaiwidth estimation What does it reduce to for NBFM and WBFM?...