I need to measure the harmonic distortion on a solar inverter (power output). I need to buy all the equipment from scratch and was wondering if my DSO needs to be CAT 2 rated if I use a CAT2 10x probe.
The mains output will be Grid tied and be at 230V 50Hz.
The DSO should only see 35V.
Alternatively, could I "just" use a AC transformer to reduce the voltage down to a lower more manageable level? As I understand, the harmonics should be higher frequency, so should have better flux linkage in a transformer, so should be measurable on the transformer secondary (given a ohmic load eg 10MOhm DSO)?