Can I use an electronic load creating a power supply Bode plot?
An electronic load is a control system of its own. It can introduce a massive error to Bode measurements of voltage regulators. For Bode measurements resistor loads with not too long wires/cables should be used. Often a larger Al-Elco at the DUT’s input supply voltage terminals helps to damp resonances of the cables between lab supply and DUT, if only ceramic capacitors are used on the DUT board. These undamped resonances can lead to wrong test results.