An AM broadcasting station is transmitting a frequency of 950 kHz with a total bandwidth of 10 kHz. (a) What are the cutoff frequency? (b) What is the modulating frequencies?
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- 1. The mathematical expression of the frequency spectrum of a general FM signal shows that it has technically a limited bandwidth a wide bandwidth an infinite bandwidth narrow bandwidth none of the choices 2. The break frequency for commercial FM broadcast of the preemphasis and deemphasis network is 2.122 kHz 2122 kHz 75 kHz 75 Hz none of the choicesThe mathematical expression of the frequency spectrum of a general FM signal shows that it has technically a limited bandwidth a wide bandwidth an infinite bandwidth narrow bandwidth none of the choicesAn FM superheterodyne receiver is tuned to a frequency of 88 MHz. What is the local oscillator frequency if low-side injection is used at the mixer? Show the details of your work.
- A telephone line having a bandwidth of 3 kHz is assigned for data communication. The SNR is 3050. What will be the capacity for the channel?Find the deviation ratio of an FM broadcast transmitter if the frequency of the modulating signal varies from 30 Hz to 20 kHz.A 300 Ω resistor is connected across the 300 Ω antenna input of a television receiver. The bandwidth of the receiver is 6 MHz, and the resistor is at room temperature (293 k or 20 C or 68 F). what are the noise power and the noise voltage applied to the receiver input
- Assuming that an oscilloscope displays a Vmax of 5.22V and Vmin of 1.33V. Calculate the percentage of modulation. Three (3) AM broadcast stations are spaced at 18 kHz, beginning at 73 kHz. Each station is allowed to transmit modulating up to 6 kHz. Compute for the upper and lower sidebands of each station and plot it in the frequency domain. Given a Vmax of 7.45V and a modulation index of 0.691, calculate for Vmin. A station is given a carrier frequency of 88 kHz. Having a modulating frequency of 12 kHz, compute for the upper and lower sidebands of the station.An FM Broadcast receiver tunes from 88 MHz to 108 MHz. The IF is 10.7 MHz. The local oscillator uses a variable capacitor with a minimum value of 102 pF. Suppose the mixer uses high-side injection, what is the value of the inductor (in nH) so that the local oscillator will tune the receiver to the highest frequency on the band when the capacitor is minimum? Round off your answer to 2 decimal places.A coil is at resonance at 10 KHz with a capacitor. If the resistance & inductance of the coil are 200 Ω & 5H. What is the value of Q factor of the coil? Select one: a. 500. b. 700. c. 1000. d. 1570.
- What is the difference between frequency modulation and phase modulation? DO NOT COPY FROM THE BOOk, please write it in your own words.Using impedances approximation, obtain the TF Eo/EiYou have a broadcasting station on the frequency of 107.3 MHz and radiate with a power of 230 KWatt with a 3 dBi antenna, if we have a receiver 50 km away with a receiving power of -112.28 dBm. What will be the power gain expressed in decibels of the receiving antenna.