Quiz: On oscilloscopes, Part 3
25 Apr 2016 | Martin RoweShare this page with your friends
The uses of a digital oscilloscope are many. And it is because of that fact that there is no scarcity of quiz questions for the past few weeks. This week marks the conclusion of a three-week series on oscilloscope quizzes based on "Oscilloscope tricks article by Arthur Pini. The questions below come from Oscilloscope tricks 21 – 30.
As always, answers appear on the last page.
1. According to the article, which are the levels used to measure a signal's rise time?
a. 5% to 95%
b. 20% to 80%
c. 0% to 100%
d. 10% to 95%
e. 10% to 90%
f. 5% to 90%

Figure 1: Rising signals
2. When making power measurements, you can plot the current through a power switching device like a FET (field-effect transistor) as a function of:
a. VDS
b. VGS
c. VGD
d. RDSon
e. None of the above

Figure 2: Power switching device current
3. Why would you use a constellation diagram?
a. To measure bit-error-ratio in wireless signals.
b. To look at data states of phase or phase-amplitude encoded data
c. To measure the frequency and phase response of a wireless signal.
d. To measure The power in a wireless signal.
e. All of the above

Figure 3: A constellation diagram
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