BRD4151A Datasheet, PDF (12/18 Pages) Silicon Laboratories – Integrated PCB antenna

8. EMC Compliance Recommendations
BRD4151A Reference Manual
EMC Compliance Recommendations
8.1 Recommendations for 2.4 GHz ETSI EN 300-328 compliance
As it was shown in the previous chapter, the radiated power of the fundamental of the BRD4151A EFR32 Mighty Gecko Radio Board
complies with the 20 dBm limit of the ETSI EN 300-328 in case of the conducted measurement but due to the high antenna gain the
radiated power is higher than the limit by 2 dB. In order to comply, the output power should be reduced (with different antennas, de-
pending on the gain of the used antenna, the necessary reduction can be different). The harmonic emissions are under the -30 dBm
limit. Although the BRD4151A Radio Board has an option for mounting a shielding can, that is not required for the compliance.
8.2 Recommendations for 2.4 GHz FCC 15.247 compliance
As it was shown in the previous chapter, the radiated power of the fundamental of the BRD4151A EFR32 Mighty Gecko Radio Board
complies with the 30 dBm limit of the FCC 15.247. The harmonic emissions are under the -37.6 dBm applied limit both in case of the
conducted and the radiated measurements. Although the BRD4151A Radio Board has an option for mounting a shielding can, that is
not required for the compliance.
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