Bluetooth power levels The transmitter powers for Bluetooth are quite low, although there are three different classes of output dependent upon the anticipated use and the range required. Power Class 1 is designed for long range communications up to about 100m devices, and this has a maximum output power of 20 dBm. Next is Power Class 2 which is used for what are termed for ordinary range devices with a range up to about 10m, with a maximum output power of 6 dBm. Finally there is Power Class 3 for short range devices. Bluetooth class 3 supports communication only up to distances of about 10cm and it has a maximum output power of 0 dBm. Power control is mandatory for Bluetooth Class 1, but optional for the others, although its use is advisable to conserve battery power. The appropriate power elvel can be chosen according to the RSSI, Received Strength Signal Indictor reading.
Class Maximum power dBm Power control capability 1 20 Mandatory 2 4 Optional 3 0 Optional Summary of Bluetooth Power Classes From: Charlie Blackham <[email protected]> Sent: 02 October 2018 17:50 To: [email protected] Subject: Re: [PSES] Device with Bluetooth Amund Yes it is - whilst EN 300 328 applies to "Wide Band Data Transmission" equipment, it covers that equipment under REC70-03<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ecodocdb.dk%2Fdownload%2F25c41779-cd6e%2FRec7003.pdf&data=01%7C01%7CAndy.McCallum%40mottmac.com%7C33e42a25271d44d816e708d62889275f%7Ca2bed0c459574f73b0c2a811407590fb%7C0&sdata=0QSyQIB40MqkjYzGud0gQjUZRZzjhTrQu2Z767xpyOE%3D&reserved=0> Annex 3 which allows maximum transmit power of 100 mW EIRP but also mandates adequate spectrum sharing conditions (for transmitters above 10 mW EIRP) Rec 70-03 Annex 1 also allows operation in the 2400-2483.5 MHz band, but with power limited to 10mW EIRP and the cited standard for that is EN 300 440 Bluetooth devices are generally (always?) under 10 mW so either standard could be applied regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: www.sulisconsultants.com<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Foutlook.hslive.net%2Fowa%2Fredir.aspx%3FC%3D02be3bf3e3a544d1bdf7b6c99fbd12f5%26URL%3Dhttp%253a%252f%252fwww.sulisconsultants.com%252f&data=01%7C01%7CAndy.McCallum%40mottmac.com%7C33e42a25271d44d816e708d62889275f%7Ca2bed0c459574f73b0c2a811407590fb%7C0&sdata=afk4XdsAwFLYUC6Hz8w3gSQ4vDYN7WNhtEM9Kecl3T0%3D&reserved=0> Registered in England and Wales, number 05466247 From: Amund Westin <[email protected]<mailto:[email protected]>> Sent: 02 October 2018 17:23 To: [email protected]<mailto:[email protected]> Subject: [PSES] Device with Bluetooth Those test reports I have seen on devices with Bluetooth communication, EN 300 328 has been use. Now, I came over such a device which has been tested according to EN 300 440 (SRD). Is that a valid optional standard to use? BR Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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