8
\$\begingroup\$

I both check via voltmeters and osc. but oscilloscope is showing the values 10 times bigger. For example 5V pulse should be 2.5 mean and voltmeters shows exactly the same but osc. shows 25 V. What can be the reason?

\$\endgroup\$
0

2 Answers 2

23
\$\begingroup\$

Sounds like the scope is expecting a 10x probe (which attenuates the signal 10x), but you are using a 1x probe instead, therefore the scope is multiplying the signal by 10 when it shouldn't be. Check your settings.

\$\endgroup\$
0
11
\$\begingroup\$

Look for the "Probe" settings for your o-scope. There should be an option to set the probe to a "10x". Seriously. It's that straightforward.

\$\endgroup\$
2
  • \$\begingroup\$ I didn't know such a thing existed. \$\endgroup\$
    – Tony Ennis
    Commented Dec 19, 2012 at 1:30
  • 3
    \$\begingroup\$ @DavidKessner I think you have it backwards -- I think the scope is already set to 10x and he is using a 1x probe, so he either needs to set the scope's 1x/10 setting to 1x, or switch to a 10x probe. \$\endgroup\$
    – tcrosley
    Commented Dec 19, 2012 at 2:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.