Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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A ham transmitter has a carrier power of 750 W. How much power is added to the signal when the transmitter is 100 percent modulated?
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- What is the term for frequency modulation produced by PM?arrow_forward*2. If a 1500-kHz radio wave is modulated by a 2-kHz sine-wave tone, what frequencies are con- tained in the modulated wave (the actual AM signal)?arrow_forwardWhen a broadcast AM transmitter is 50 percent modulated, its antenna current is 12 A. What will the current be when the modulation depth is increased to 0.9?arrow_forward
- If an FM transmitter employs one doubler, two tripler, and one quadrupler, what is the carrier frequency swing when the oscillator frequency swing is 2 kHz?arrow_forward3. An FM broadcast transmitter is modulated 50% by a 7-kHz test tone. When the frequency of the test tone is changed to 5 kHz and the percentage of modulation is unchanged, what is the transmitter frequency swing?arrow_forwardI need the answer quicklyarrow_forward
- What parts of the varactor act as the plates of a capacitor? How does capacitance vary with applied voltage? Do varactors operate with forward or reverse bias? What is the main reason why LC oscillators are not used in transmitters today? Can the most widely used type of carrier oscillator be frequency-modulated by a varactor? What is the main advantage of using a phase modulator rather than a direct frequency modulator? What is the term for frequency modulation produced by PM? What is the most basic FM detector circuit? What circuit compensates for the greater frequency deviation at the higher modulating signal frequencies? What two IC demodulators use the concept of averaging pulses in a low-pass filter to recover the original modulating signal? Which is probably the best FM demodulator of all those discussed in this module? What is a capture range? What is a lock range? What frequency does the VCO assume when the input is outside the capture range? What type of circuit does a PLL…arrow_forwardWhat is the effect on the transmitted power of AM signal when the modulation index changes from 0.8 to 1 ?arrow_forward2. What is the frequency swing of an FM broadcast transmitter when modulated 60%?arrow_forward
- Good day! Please help me understand how series modulator work in obtaining AM wave. Explain the flow of the circuit as well as the functions of the components. Need ASAP. Thank you so much!arrow_forwardanswer iiarrow_forwardQuestion 2 i. An AM radio transmitter operating on 3.9 MHz is modulated by frequencies up to 4 kHz. a. What are the maximum upper and lower side frequencies? b) What is the total bandwidth of the AM signal? An AM transmitter puts a carrier of 6 A into an antenna whose resistance is 52 N. The transmitter is modulated by 60 percent. What is the total output power? ii.arrow_forward
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