Hello everybody, Would you please help me with this problem: - I have a pulse gating system that has manual knob to adjust applied high voltage: http://img156.imageshack.us/img156/908/75377199.jpg [Broken] Now I want to control it through a BNC connector (I have signal generator). Please give me a piece of advice for what I should do. I really appreciate your help. It will be great if you can show me a detailed circuit (if it's possible). If not, please tell me where I can find the solution or which book I should read to solve it. Thank you very much!