Q-1: If a power ratio is 20:1, this can be expressed as 10:1 times 2:1. You know that 10:1 is 10 dB and that 2:1 is 3 dB. Although power ratios multiply, decibels add. So a power ratio of 20 (10 times 2) is 10 + 3 dB or 13 dB. Learning from this example, what will a power ratio of 1:800 be in decibels?

Q-2: a) Why did the Bluetooth SIG have to develop Bluetooth profiles?

b) What profile would a Bluetooth-enabled notebook use to print to a nearby printer?

c) What profile would a tablet use with a Bluetooth keyboard?

d) What profile can a mobile phone use to communicate with a headset?

e) Why will Bluetooth Smart extend the types of devices that can communicate wirelessly?