The Lock In Amplifier (LIA) (20210405 - In Class Lecture)

2020's lecture is available here: • The Lock-In Amplifier ... with similar content, but indexed time points in the description of when I cover each topic about the LIA (and without my scrappy handwriting). Thanks for watching!

[@smiling_at_you]

Great video, helped me a lot with my lab. -Physics student from Toronto

[@ruwanpremashantha428]

I did a lot of research on the functionality of a lock in amplifier. It was very clear from your video. Thank you very much.

[@m.awadein4538]

Good job Lydia!

[@ruwanpremashantha428]

hay guys. I have a problem with this. Can You Answer?

[@sisouhzl5645]

Great lecture

[@ruwanpremashantha428]

I gave the signal from a function generator as shown in the picture above. That is, 10khz from one channel and 100hz from the other channel and the two were combined and given to the lock in amplifier. Then 10hz was given as the reference signal. But 500mv, the vrms value of the 10hz signal, will not show then. Showing a much lower value than that. Is it not possible to measure the voltage of one of the two channels together by the lock in amplifier as above? Is there anything wrong with it as you know it?

[@ruwanpremashantha428]

And I have a problem. Can You Answer?