I borrowed one that could detect signals from 100 kilohertz (kHz), just below the
frequency of long - wave
radio stations, up to 3 gigahertz (GHz), somewhat above the 2.4 GHz portion of the spectrum used by Wi - Fi connections (see «Radio Ways,» be
radio stations, up to 3 gigahertz (
GHz), somewhat above the 2.4
GHz portion of the
spectrum used by Wi - Fi connections (see «
Radio Ways,» be
Radio Ways,» below).
The router does this by tapping into parts of the
radio spectrum in the 5 -
GHz band that many routers aren't using because the dynamic
frequency selection is usually reserved for emergency services.