Thomas Kunz
Systems and Computer Engineering
192
Bluetooth Radio
nfrequency hopping in
79 hops displaced by 1 MHz, starting at 2.402 GHz
and stopping at 2.480 GHz
–to function on a worldwide basis, Bluetooth requires a
radio frequency that is license-free and
open to any radio
–2.45 GHz ISM band satisfies these requirements, although
it must cope with interference from baby
monitors, garage door openers, cordless
phones and microwave ovens, which also use this frequency.
ndue to local
regulations the bandwidth is reduced in Japan, France and Spain. This is handled by an internal
software switch
nthe maximum
frequency hopping rate is 1600 hops/s.