EMI Noise - Is this PSU Magic?? SMPS, Linear Mode PSU, - How to track down common mode noise - Analog scope vs Digital scope for accurate noise measurements

• Pay special attention to the EMI generated by the "lights in the room" 
• Linear Mode Power Suppy the looks like a "switcher" or SMPS?
• Also interesting... Analog Scope vs Digital scope for accurate EMI measurements

During interviews, projects, and requirements gathering for new prototypes comes the need to measure the interference induced by your surrounds.

I refer to this video time and time again...