
ECT 263 ECT263 Quizzes with Answers (DeVry)
ECT 263 ECT263 All Quizzes WEEKS 1-7
- (TCO 1) The following response curve would be produced by what kind of filter?
- (TCO 1) Calculate the wavelength of a 950KHz carrier signal.
- (TCO 1) Which of the following would be a linear device?
- (TCO 1) A spectrum analyzer displays what?
- (TCO 2) Referring to the diagram below, which block is the carrier oscillator?
- (TCO 2) Referring to the block diagram below, block Y would be a(n)
- (TCO 2) Referring to the AM envelope below, what is the modulation factor?
- Referring to the spectrum analyzer display below, what is the modulation frequency?
- (TCO 2) What could be done to improve the spectrum analyzer display shown below?
- (TCO 3) Referring to the diagram below, which block is the RF amplifier?
- (TCO 3) An AM receiver s local oscillator is tuned to 1195KHz and is using high-side injection. What would be the frequency of the desired carrier?
- (TCO 3) An AM receiver is tuned to receive a carrier frequency of 1040KHz and is using high-side injection. What would be the frequency of the image frequency?
- (TCO 3) An AM receiver is tuned to receive a carrier frequency of 1370KHz and is using low-side injection. What would be the image frequency?
- Referring to the spectrum analyzer display below for the AM signal, what is the modulation frequency?
- Based on information from previous question, modulator factor = _____
- Continue from previous question, carrier frequency = ______
- In AM Superheterodyne receiver, IF Amps are lowpass filters and cutoff frequency is set at 455KHz.
- (TCO 4) From the spectrum analyzer display shown below, determine the total bandwidth needed to transmit that signal.
- (TCO 4) From the spectrum analyzer display below, determine the modulation frequency.
- (TCO 4) Using the Bessel chart below, determine how many significant sideband pairs a transmission with a modulation factor of 4.0 would generate.
- (TCO 4) An FM transmitter has a carrier frequency of 150MHz, a deviation of +/-15KHz and audio modulation frequency of 3KHz. Calculate the modulation factor?
- Amplitude modulation is a process in which peak amplitude of the carrier signal varies in direct proportion to amplitude variations in the modulation signal (baseband).
- Frequency modulation is a process in which frequency of the carrier signal varies in direct proportion to frequency variations in the modulation signal
- (TCO 5) Referring to the PLL block diagram below, which two signals are in sync when the PLL is "locked"?
- (TCO 5) Referring to the block diagram of a PLL below, what is the function of block B?
- (TCO 5) Which of the points on the S-curve below would correspond to the PLL being in the locked mode?
- (TCO 5) The PLL shown below is configured as a frequency synthesizer. Which point would be the output?
- Phase Locked Loop (PLL) system is used to lock in the voltages of two signals.
- (TCO 6) Referring to the block diagram below, which block is the discriminator?
- (TCO 6) If an FM receiver is tuned to receive a carrier frequency of 160.5MHz and uses high-side injection, what would be the frequency of the local oscillator?
- (TCO 6) If an FM receiver is tuned to receive a carrier frequency of 160.50MHz and is using low-side injection, what would the image frequency be?
- The Phase Comparator in the PLL can be implemented using a Multiplier.
- In AM system, the recovered information signal can be obtained from the output of the lowpass filter in the AM Demodulator.
- (TCO 7) What module does Tims use as a modulator?
- (TCO 7) After you are done connecting the modules in a Tims system, how do you turn on the circuit?
- (TCO 7) What is the phase (angle) difference between sine and cosine?
- (TCO 7) What is slew rate?
- (TCO 7) When we draw a phasor diagram, we use what coordinate system?
- (TCO 7) Which of the following is BPSK modulation? Constellation choices2