Data and Signals
1. Before data can be transmitted, they must be transformed to ________.
A.  periodic signals B.  electromagnetic signals C.  aperiodic signals D.  low-frequency sine waves
2. A periodic signal completes one cycle in 0.001 s. What is the frequency?
A.  1 Hz B.  100 Hz C.  1 KHz D.  1 MHz
3. In a frequency-domain plot, the horizontal axis measures the ________.
A.  peak amplitude B.  frequency C.  phase D.  slope
4. In a time-domain plot, the horizontal axis is a measure of ________.
A.  signal amplitude B.  frequency C.  phase D.  time
5. If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?
A.  5 KHz B.  10 KHz C.  47 KHz D.  57 KHz
6. What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz?
A.  4 MHz B.  1 KHz C.  3 MHz D.  none of the above
7. As frequency increases, the period ________.
A.  decreases B.  increases C.  remains the same D.  doubles
8. Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.
A.  one-half B.  twice C.  the same as D.  indeterminate from
9. A sine wave is ________.
A.  periodic and continuous B.  aperiodic and continuous C.  periodic and discrete D.  aperiodic and discrete
10. . If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.
A.  2 B.  1 C.  -2 D.  between -2 and 2