Path: EDN Asia >> News Centre >> Test & Measurement >> Quiz: On oscilloscopes, Part 3
Test & Measurement Share print

Quiz: On oscilloscopes, Part 3

25 Apr 2016  | Martin Rowe

Share this page with your friends

1. According to the article, which are the levels used to measure a signal's rise time?

The correct answer is e, 10% to 90%.

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:

The correct answer is a, VDS.

3. Why would you use a constellation diagram?

The correct answer is b, To look at data states of phase or phase-amplitude encoded data.

4. If you logarithmically weight a signal and the result is linear, what does that tell you about the signal?

The correct answer is f, the signal is exponential.

5. The figure below shows the trace of a pulse-modulated carrier, often used to convey information. If the modulation is truly rectangular, then which of the choices below best describes the signal's frequency spectrum?

The correct answer is b, sin(x)/x shape centred at the carrier frequency.

sin(x)/x shape centred

Figure 6: Sin(x)/x shape centred at the carrier frequency.

 First Page Previous Page 1 • 2 • 3

Want to more of this to be delivered to you for FREE?

Subscribe to EDN Asia alerts and receive the latest design ideas and product news in your inbox.

Got to make sure you're not a robot. Please enter the code displayed on the right.

Time to activate your subscription - it's easy!

We have sent an activate request to your registerd e-email. Simply click on the link to activate your subscription.

We're doing this to protect your privacy and ensure you successfully receive your e-mail alerts.

Add New Comment
Visitor (To avoid code verification, simply login or register with us. It is fast and free!)
*Verify code:
Tech Impact

Regional Roundup
Control this smart glass with the blink of an eye
K-Glass 2 detects users' eye movements to point the cursor to recognise computer icons or objects in the Internet, and uses winks for commands. The researchers call this interface the "i-Mouse."

GlobalFoundries extends grants to Singapore students
ARM, Tencent Games team up to improve mobile gaming

News | Products | Design Features | Regional Roundup | Tech Impact