I am testing out the lock in amplifier with just a single resistor, but there seems to be a downward drift in the in phase voltage. What could possibly cause this to happen? Could it be some grounding issue?

Thank you for your time.

up vote 3 down vote accepted

It could be real- you could be heating the resistor with the applied signal and you could be seeing the temperature coefficient of the resistor.

Your Answer

 

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

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