We use the REI OSCOR Green 24 Ghz, which is the latest and most common industry standard spectrum analyzer. This devices will scan the radio spectrum from 10Khz to 24GHz and identify LIVE frequencies in the airwaves. The technician will take an outdoor reference scan and then compare it to one or more scans acquired inside the target areas. The analyzer will identify those signals that are stronger in the target area, which are then demodulated to determine the signal source, type or threat.