nRF21540 regulamentation in EU

RE: nRF21540 regulamentation in EU

Øyvind — Wed, 13 Jul 2022 07:14:11 GMT

[quote user="Gianlucamilani"]So, this means that in US you could go with +12db?[/quote]

Yes, that is correct.

[quote user="Gianlucamilani"]Do you think it still make sense to add the device if I have to limit it to +2db?[/quote]

This is for you to decide. You will need to compare the results against your demands in performance.

-Øyvind

RE: nRF21540 regulamentation in EU

Gianlucamilani — Tue, 12 Jul 2022 15:19:33 GMT

So, this means that in US you could go with +12db? Do you think it still make sense to add the device if I have to limit it to +2db?

RE: nRF21540 regulamentation in EU

Øyvind — Tue, 12 Jul 2022 13:25:01 GMT

Hello Gianluca,

the DevZone team and Nordic Semiconductor are currently in a summer vacation period, some delays in answers must be expected due to lower staffing during this period. We apologize for the inconvenience.

As described in the link you refer to:

** ETSI has a limit of 10 dBm/1 MHz for 802.15.4. Although 802.15.4 specifies 5 MHz channel widths, only 2 MHz of the channel is consumed with the occupied bandwidth. Doubling the bandwidth to 2 MHz adds 3 dB, which leads to 13 dBm.

If you are targeting the nRF52840 running at 8 dBm, the nRF21540 is only allowed to 2 dBm to meet the maximum dBm value in European regulatory.

Kind regards,
Øyvind