Hi everyone. Non-engineer here looking to validate an element of my project.
I am running a small research project which involves managing one PCB designer. Our objective is to design a board capable of capturing low amplitude biometric signals. We've been through many iterations of our PCB but the signal is still very noisy compared to other devices used in the same location on the body.
Our engineer says this is because hand-assembling PCBs inherently results in a noisier board than machine assembly would (we've tried machine assembly - still noisy). I wanted to validate whether or not we should expect to see any difference in signal quality between hand assembled boards and machine assembled boards?