Thanks. I am using the "DC coupling" setting on the SR830. If I use "AC coupling", I do not get the DUT signal due to excitation from the 10kHz amplitude-modulated 2 GHz ac current. But seems like a band pass filter might work, shall try that thanks.
Hello
I am currently have difficulties trying to measure dc-modulated voltages while applying a dc current, via Sr830 Lock-in Amplifier (LIA).
Basically, I apply an 2 GHz ac current (amplitude modulated@10kHz and referenced to the LIA for lock-in measurement) and a dc current to my DUT...