A&D Series 57ZZ Manual do Utilizador descarregar pdf (Página 38)

10. A digital oscilloscope’s acquisition controls let you specify:

a. Whether the oscilloscope uses real-time or equivalent-time sampling to collect sample points.

b. Whether to average a collection of records to form a waveform.

c. How sample points are processed to form waveform points.

d. All the above.

11. The acquisition mode that best reduces noise in a repeating signal is:

a. Sample mode.

b. Peak detect mode.

c. Envelope mode.

d. Averaging mode.

12. The two most basic measurements you can make with an oscilloscope are:

a. Time and frequency measurements.

b. Time and voltage measurements.

c. Voltage and pulse width measurements.

d. Pulse width and phase shift measurements.

13. If the volts/division is set at 0.5, the largest signal that can fit on the screen (assuming an 8 x 10 division

screen) is:

a. 62.5 millivolts peak-to-peak.

b. 8 volts peak-to-peak.

c. 4 volts peak-to-peak.

d. 0.5 volts peak-to-peak.

14. If the seconds/division is set at 0.1 ms, the amount of time represented by the width of the screen is:

a. 0.1 ms.

b. 1 ms.

c. 1 second.

d. 0.1 kHz.

15. By convention, pulse width is measured:

a. At 10% of the pulse’s maximum voltage.

b. At 50% of the pulse’s maximum voltage.

c. At 90% of the pulse’s maximum voltage.

d. At 10% and 90% of the pulse’s maximum voltage.

16. You attach a probe to your test circuit but the screen is blank. You should:

a. Check that the screen intensity is turned up.

b. Check that the oscilloscope is set to display the channel that the probe is connected to.

c. Set the trigger mode to auto since norm mode blanks the screen.

d. Set the vertical input coupling to AC and set the volts/division to its largest value since a large DC

signal may go off the top or bottom of the screen.

e. Check that the probe isn’t shorted and make sure it is properly grounded.

f. Check that the oscilloscope is set to trigger on the input channel you are using.

g. All of the above.

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A&D Series 57ZZ Manual do Utilizador Página 38