Given an FM modulator with a deviation sensitivity K­1= 3.7 kHz/V and a modulating signal vm = 5.2 sin(2π1,906t), determine the carrier swing in kHz For an FM modulator with an unmodulated carrier amplitude Vc­= 14 V, a modulation index m = 1, and a load resistance RL = 8 ohms, determine the power (in watts) in the modulated carrier The percent modulation of the sound portion of a TV signal is 85%. The maximum frequency deviation for the sound portion of the TV signal as specified by the FCC is 25 kHz. Determine the carrier swing (in kHz) of the signal.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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  1. Given an FM modulator with a deviation sensitivity K­1= 3.7 kHz/V and a modulating signal vm = 5.2 sin(2π1,906t), determine the carrier swing in kHz
  2. For an FM modulator with an unmodulated carrier amplitude V= 14 V, a modulation index m = 1, and a load resistance RL = 8 ohms, determine the power (in watts) in the modulated carrier
  3. The percent modulation of the sound portion of a TV signal is 85%. The maximum frequency deviation for the sound portion of the TV signal as specified by the FCC is 25 kHz. Determine the carrier swing (in kHz) of the signal.
  4. For an FM modulator with 40-kHz frequency deviation and a modulating-signal frequency fm= 13 kHz, determine the bandwidth (in kHz) using Carson's rule.
  5. Given an FM modulator with a deviation sensitivity K­1= 1.4 kHz/V and a modulating signal vm = 3.9 sin(2π1,948t), determine the peak frequency deviation in kHz.
  6. The percent modulation of the sound portion of a TV signal is 73%. The maximum frequency deviation for the sound portion of the TV signal as specified by the FCC is 25 kHz. Determine the frequency deviation  in kHz.
  7. An FM signal has a frequency deviation of 8 kHz and a modulating frequency of 1.2 kHz. The signal-to-noise ratio at the input to the receiver detector is 19.4 dB. Calculate the approximate signal-to-noise ratio (in dB) at the detector output.
  8. A sine wave of frequency 7 kHz phase modulates a carrier at 22 MHz. The peak phase deviation is 1 rad. Calculate the maximum frequency deviation in Hz.
  9. A phase modulation system operates with a modulation index of 2. What is the maximum phase shift in degrees?
  10. Determine the modulation index for a PM modulator with a deviation sensitivity of kp= 1.7 rad/V and a modulating signal of vm(t) = 7cos (2π3000t).
  11. A phase modulator has kp= 2.8rad/V. What rms voltage of a sine wave causes a peak phase deviation of 74°?  
  12. Determine the peak phase deviation for a PM modulator with deviation sensitivity K = 3.8 rad/V and a modulating signal vm= 12 sin(2π1000t).
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