How we could start looking for alien transmitters in our solar system

SETI now has the technology to go snooping for extraterrestrials in our own backyard. No, not as close as little green men cutting up crop circles. Rather, we should be able to detect an alien device positioned somewhere between the sun to 30 times farther out than Pluto. » 10/17/13 1:30pm 10/17/13 1:30pm