Transmit with 20 dbm in BLE coded phy in Europe?

RE: Transmit with 20 dbm in BLE coded phy in Europe?

Cheng Yuan — Thu, 04 May 2023 10:40:28 GMT

This is a topic I'm also interested in. According to the article below, if AFH is supported, the maximum tx power allowed by FCC should be 30dBm except the physical channels 37 and 38.

docs.silabs.com/.../tx-power-limitations-for-regulatory-compliance-etsi-fcc

RE: Transmit with 20 dbm in BLE coded phy in Europe?

Parmiss — Wed, 10 Aug 2022 14:16:52 GMT

The extended advertising take place on all 40 channels. Primary advertisement packets are transmitted on 37, 38, 39. But secondary adv packets are sent on all data channels.

RE: Transmit with 20 dbm in BLE coded phy in Europe?

SwRa — Wed, 10 Aug 2022 14:03:52 GMT

Hello,

Advertising takes place only on 3 channels, which is less than the minimum number of channels(5).. Hence none of our SDK's uses frequency hopping.

Best Regards,

Swathy

RE: Transmit with 20 dbm in BLE coded phy in Europe?

Parmiss — Thu, 04 Aug 2022 13:28:07 GMT

As I understood, we can transmit with 20 dBm if we use "extended advertisement" to have more than 15 channels and support "adaptive frequency hopping". That said, nordic ble sdk does not seem to support AFH, but another vendor does.

RE: Transmit with 20 dbm in BLE coded phy in Europe?

SwRa — Wed, 03 Aug 2022 12:54:21 GMT

Hi Parmiss,

The maximum power in Europe is 10 dBm for BLE of all kinds.. If you are amplifying the transmission power as well, it is possible only up to 10dBm..

Best Regards,

Swathy

RE: Transmit with 20 dbm in BLE coded phy in Europe?

Parmiss — Wed, 27 Jul 2022 09:50:56 GMT

Thanks for the reply.

Could you elaborate on that? I know that we cannot set it to 20, but we are thinking of amplifying it. Is that a regulatory limit?

RE: Transmit with 20 dbm in BLE coded phy in Europe?

SwRa — Wed, 27 Jul 2022 07:45:12 GMT

Hi Parmiss,

It is not possible to set the transmission power to 20dBm in coded PHY..

Best Regards,

Swathy