The Loop Slooth Exciter/Detector ground loop diagnostic device from Circuit Insights enables rapid, easy ground loop troubleshooting by revealing ground loop paths without disconnecting cables. The Exciter induces a test signal into the ground loop just like a real noise or interference signal would inductively couple to the ground loop. The Detector then tracks the magnetic field produced by the test signal and so traces out the ground loop physical path. The unit can also detect ground loop branching, a problem essentially undetectable by the traditional method of disconnecting and reconnecting cables. 626/201-0488; www.loopslooth.com