calculate i a) the total power 6 the power in each side frequency for a standard...
What is the total average power for a commercial AM transmitter with an unmodulated carrier power of 20 kW and 100% modulation? 20 kW 30 kW 53.34 kW 80 kW
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...
The AM signal supplies 150w of carrier power when it is modulated by a single sine wave to a depth of 70%. Suppose the total transmitted power increases by 10% when another sine wave simultaneously amplitude modulates the carrier. Determine the modulation index of the second index.
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
Please answer these 4 questions because they are related to each other. Thanks:) Question 2 (Total 20 marks) (a) Given an AM signal Vam (t)=5[10+ cos(1000xt) ]cos(30000īt) volts is fed to a 1000 load. Determine (i) the average power in the carrier; (ii) the average power in the upper sideband (iii) the ratio of the power in sidebands to the power in the carrier. (6 marks) (b) For the AM signal given in part (a), sketch its double-sided amplitude spectrum...
Find he 20 200 114 pts) Problem 6) A phase-modulated signal is denoted by the following equation: (a) Find the power of the modulated signal. (b) Find the carrier frequency fe (c) Find the frequency deviation Δ. (d) Find the deviation ratio B (e) Find the phase deviation A (t Estimate the bandwidth of pptt). (g) Knowing that the k, of the frequency modulator equal to 2n, what will the FM representation of this signal be if the FM modulator...
1. To transmit an AM signal, how would you minimize power requirement. If an 150 kW AM transmitter modulates at 95%, calculate the required power for one of the side band signals and determine its ratio with the AM transmitter power. [10] 2. Sketch and describe a simple AM Modulator circuit, and explain how it generates the AM signal with the signal status at each stage, starting from the mixture of information signal and carrier signal. [10] 3. Sketch and...
Calculate the radio-frequency ranges which would be suitable for transmission: (i) to a satellite, and (ii) between Australia and Singapore. Assume that the maximum electron concentration in the ionosphere is 102 m-and that in (ii) the angle of incidence with the ionosphere is 40°. Also remember, reflections from a surface will occur iff<fp/coso. (6 marks) In an intrinsic Ge crystal at 300 K which has a carrier concentration of (see the formula sheet), calculate (i) the conductivity, (ii) the proportion...
I am stuck with the problem of finding the average input power(dun know how to find bar x(t)^2), with the formula below. Please help me and finish the question, and also in part b, the FM problem(how to find Pr). Thx. We were unable to transcribe this imageSNR3p SNR,-β2 for FM for FM Question 2 A communication channel has 20-dB attenuation and additive white Gaussian noise with power spectral density of 3x103 WHz. The bandwidth of the message signal is...