What is Bluetooth Technology?

Attend Bluetooth Training and Learn more about Bluetooth

During the Bluetooth Training, learn about Bluetooth technology, a short range wireless communications system connecting many different types of devices, such as mobile phones, headsets, heart monitors, medical equipment and many other smart devices.

Fast Facts on Bluetooth

Unlike other wireless standards, the Bluetooth Core Specification provides product developers both link layer and application layer definitions, which support data and voice applications.

Spectrum

Bluetooth technology operates in the unlicensed industrial, scientific and medical (ISM) band at 2.4 to 2.485 GHz, using a spread spectrum, frequency hopping, full-duplex signal at a nominal rate of 1600 hops/sec. The 2.4 GHz ISM band is available and unlicensed in most countries  Interference
Bluetooth technology's adaptive frequency hopping (AFH) capability was designed to reduce interference between wireless technologies sharing the 2.4 GHz spectrum. AFH works within the spectrum to take advantage of the available frequency.

This is done by the technology detecting other devices in the spectrum and avoiding the frequencies they are using. This adaptive hopping among 79 frequencies at 1 MHz intervals gives a high degree of interference immunity and also allows for more efficient transmission within the spectrum.
For users of Bluetooth technology this hopping provides greater performance even when other technologies are being used along with Bluetooth technology.

Range

Range is application specific and although a minimum range is mandated by the Core Specification, there is not a limit and manufacturers can tune their implementation to support the use case they are enabling.
Range may vary depending on class of radio used in an implementation:

• Class 3 radios – have a range of up to 1 meter or 3 feet
• Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 33 feet
• Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feet

Bluetooth Power

The most commonly used radio is Class 2 and uses 2.5 mW of power. Bluetooth technology is designed to have very low power consumption. This is reinforced in the specification by allowing radios to be powered down when inactive.

The Generic Alternate MAC/PHY in Version 3.0 HS enables the discovery of remote AMPs for high speed devices and turns on the radio only when needed for data transfer giving a power optimization benefit as well as aiding in the security of the radios.

Bluetooth low energy technology, optimized for devices requiring maximum battery life instead of a high data transfer rate, consumes between 1/2 and 1/100 the power of classic Bluetooth technology.