Extra Exam - E8A
Terms
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- B
- E8A07 What determines the PEP-to-average power ratio of a single-sideband phone signal? / A. The frequency of the modulating signal / B. The characteristics of the modulating signal / C. The degree of carrier suppression / D. The amplifier gain
- C
- E8A04 What is the equivalent to the root-mean-square value of an AC voltage? / A. The AC voltage found by taking the square of the average value of the peak AC voltage / B. The DC voltage causing the same amount of heating in a given resistor as the corresponding peak AC voltage / C. The DC voltage causing the same amount of heating in a resistor as the corresponding RMS AC voltage / D. The AC voltage found by taking the square root of the average AC value
- D
- E8A12 What type of information can be conveyed using digital waveforms? / A. Human speech / B. Video signals / C. Data / D. All of these answers are correct
- D
- E8A05 What would be the most accurate way of measuring the RMS voltage of a complex waveform? / A. By using a grid dip meter / B. By measuring the voltage with a D'Arsonval meter / C. By using an absorption wavemeter / D. By measuring the heating effect in a known resistor
- C
- E8A13 What is an advantage of using digital signals instead of analog signals to convey the same information? / A. Less complex circuitry is required for digital signal generation and detection / B. Digital signals always occupy a narrower bandwidth / C. Digital signals can be regenerated multiple times without error / D. All of these answers are correct
- A
- E8A06 What is the approximate ratio of PEP-to-average power in a typical voice-modulated single-sideband phone signal? / A. 2.5 to 1 / B. 25 to 1 / C. 1 to 1 / D. 100 to 1
- A
- E8A03 What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics? / A. A sawtooth wave / B. A square wave / C. A sine wave / D. A cosine wave
- A
- E8A14 Which of these methods is commonly used to convert analog signals to digital signals? / A. Sequential sampling / B. Harmonic regeneration / C. Level shifting / D. Phase reversal
- B
- E8A15 What would the waveform of a digital data stream signal look like on a conventional oscilloscope? / A. A series of sine waves with evenly spaced gaps / B. A series of pulses with varying patterns / C. A running display of alpha-numeric characters / D. None of the above; this type of signal cannot be seen on a conventional oscilloscope
- C
- E8A02 What type of wave has a rise time significantly faster than its fall time (or vice versa)? / A. A cosine wave / B. A square wave / C. A sawtooth wave / D. A sine wave
- B
- E8A10 Which of the following is a distinguishing characteristic of a pulse waveform? / A. Regular sinusoidal oscillations / B. Narrow bursts of energy separated by periods of no signal / C. A series of tones that vary between two frequencies / D. A signal that contains three or more discrete tones
- A
- E8A08 What is the period of a wave? / A. The time required to complete one cycle / B. The number of degrees in one cycle / C. The number of zero crossings in one cycle / D. The amplitude of the wave
- A
- E8A01 What type of wave is made up of a sine wave plus all of its odd harmonics? / A. A square wave / B. A sine wave / C. A cosine wave / D. A tangent wave
- C
- E8A09 What type of waveform is produced by human speech? / A. Sinusoidal / B. Logarithmic / C. Irregular / D. Trapezoidal
- D
- E8A11 What is one use for a pulse modulated signal? / A. Linear amplification / B. PSK31 data transmission / C. Multiphase power transmission / D. Digital data transmission