I am trying to build the lock in functionality of the SR830 onto a PCB for my specific needs. I have an input at 100kHz which I modulate with 400Hz signal and then have to detect the output at 400Hz through lock-in amplifier. Can someone please guide me how to implement this? I saw datasheet of AD630 but I am not sure whether it can handle this high frequency. Or if there is any other better way to implement the circuit.
Thanks for your help!