how do you get around testing a circuit with a full wave bridge?Compensation is only for 10x or greater probes. Metal screwdrivers can change the capacitance. There are plastic "alignment tools".
In a lot of switching power supplies are either full (120V) or 1/2 wave rectified (240 V) to start wit 3xx volts DC.
The two diode drops at the full-wave bridge cause major issues when trouble-shooting.