4
\$\begingroup\$

My Multisim Oscilloscope is ALWAYS doubling my input voltage.

If I put a 5Vp in from the function generator, it will show a sine wave with a 10Vp in the scope.

This is extremely frustrating and I would appreciate any help. Here is a screenshot:

This is the scope showing 5V/div - you can see it reaching two division, i.e. 10Vp

Figure 1: This is the scope showing 5V/div - you can see it reaching two division, i.e. 10Vp

Improve this question
\$\endgroup\$
2
  • 3
    \$\begingroup\$ Try connecting to COM of signal generator instead of - \$\endgroup\$ – Simon Sultana Dec 4 '20 at 2:39
  • \$\begingroup\$ Does Multisim model the output impedance of the signal generator and input impedance of the oscilloscope? \$\endgroup\$ – Sredni Vashtar Dec 4 '20 at 3:47
8
\$\begingroup\$

Connection to function generator should be to COM (common/ground) instead of negative. Also add a ground point for good practice. Try that.

'-' connection is used for phase inversion

Improve this answer
\$\endgroup\$
1
  • \$\begingroup\$ Many thanks, that solved it! \$\endgroup\$ – Adrian Salt Dec 4 '20 at 15:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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