Using HDR with Radio Shack power inverter

Steven Gibbs says that the square wave of a power inverter that converts 12V DC to 115V AC makes the HDR work better.

I used a Radio Shack power inverter hooked up to my car that has a modified sine wave, about half way between a square wave and a pure sine wave. Checking with an Oscilloscope, the square wave is straight up and down, versus a pure sine wave displays a very smooth rise and fall, and smooth rounded dome peaks, in constrast the modified sine wave looks like a staircase.

The power coming from the HDR felt "dirty" when hooked up to a power inverter, I prefer the HDR hooked up to household power, but it also appears that using a square wave makes the HDR more powerful due to the rich harmonics created by the square wave.