For those who need a more concrete example here is a guy who found a power pole that was malfuctioning doing just that, with an odroid, 5x rtl-sdr dongles, and

For those who need a more concrete example here is a guy who found a power pole that was malfuctioning doing just that, with an odroid, 5x rtl-sdr dongles, and a gps acquisition device. http://blog.dxers.info/2015/01/ameren-ue-utility-power-pole-572795.html http://blog.dxers.info/2015/01/ameren-ue-utility-power-pole-... More info: https://www.rtl-sdr.com/measuring-power-line-noise-neighbourhood-rtl-sdr-driveby-system/ https://www.rtl-sdr.com/measuring-power-line-noise-neighbour... Would work just fine with a single dongle, a laptop, and a usb gps device or cell phone, just would have to do a few more drive arounds in different frequency bands.