1. In modulation a parameter of the __________ is systematically varied according to the waveform of the _________ .
First blank
A. carrier signal B. sidebands C. modulated carrier D. program signal Second blank
A. carrier signal B. sidebands C. modulated carrier D. program signal
2. Any individual modulator has at least ______________ input(s) and __________ output signal(s).
First blank
A. one B. two C. three D. four or more Second blank
A. one B. two C. three D. four or more
3. In all types of modulation, both the carrier and modulating frequencies are present in the output spectrum, along with any sidebands that are produced. T or F
4. In Ring Modulation with a sine-wave carrier C and a sine-wave modulator M, the following frequencies are always present in the output spectrum (one or more).
A. C B. M
C. C + M D. C - M
E. 2C
5. In Ring Modulation with a sine-wave carrier C and a sine-wave modulator M that is an octave above C, the following frequencies are present in the output spectrum (one or more).
A. C B. M
C. 0 D. 2C
E. 3C
6. In Ring Modulation with a sine-wave carrier C and a sine-wave modulator M that is an octave above C, the following frequencies are present in the output spectrum (one or more).
A. C B. M
C. 0 D. 2C
E. 3C
7. Modulation at sub-audio rates does NOT produce effects such as ________, depending on the type of modulation involved.
A. tremolo
B. vibrato
C. chopping D. sidebands
8. When the modulating signal is much higher than the carrier frequency in ring modulation, the output is ________ than the carrier.
A. much higher than
B. much lower than
C. an octave above
D. an octave below
9. Convolving a sound with itself emphasizes the strongest frequencies in the sound, minimizes the weaker ones, and doubles the length of the resulting output. T or F
10. Convolving two signals multiplies their spectra, whereas ring modulating them multiplies their waveforms. T or F
Index
home