I am constructing a filter unit that is intended to allow visualisation (on a scope) and measurement of high-frequency interference on 240v UK mains by means of a high-pass filter to remove the 50 Hz component.
What would be the best (and safest) circuit to isolate the unit from the mains while allowing such interference signals through? I have had vague thoughts of resistive dividers, decoupling capacitors and pulse transformers so far.
What would be the best (and safest) circuit to isolate the unit from the mains while allowing such interference signals through? I have had vague thoughts of resistive dividers, decoupling capacitors and pulse transformers so far.