Product Info

NINA-B4 series - Application note
UBX-20037320 - R03 Contents Page 5 of 19
C1-Public
2 Qualification and approvals by country
2.1 European Union regulatory compliance
For information about the regulatory compliance of NINA-B4 series modules against requirements
and provisions in the European Union, see NINA-B4 Declaration of Conformity [1].
2.1.1 Radio Equipment Directive (RED) 2014/53/EU
NINA-B4 series modules comply with the essential requirements and other relevant provisions of
Radio Equipment Directive (RED) 2014/53/EU.
2.1.2 Output power limitation
The Radio Equipment Directive requires radio transmitters that have an Equivalent Isotropically
Radiated Power (EIRP) of 10 dBm or more, to either implement an adaptivity feature or reduce its
medium utilization.
The NINA-B4 series modules are based on the Nordic Semiconductor nRF52833 chip, which supports
multiple radio protocols such as Bluetooth low energy, IEEE 802.15.4 with thread etc.
Since Bluetooth low energy does not support either adaptivity or reduced medium utilization, a
NINA-B4 Bluetooth LE implementation on the European market must have an EIRP of less than 10
dBm.
⚠ In the European market, it is the end-product manufacturer that holds the responsibility that
these limitations are followed. If the u-blox module integrator is not the end-product
manufacturer, the module integrator should make sure that this information is shared with the
end-product manufacturer.
☞ Radio protocols based on 802.15.4, which supports adaptivity is allowed an EIRP of 10 dBm or
higher.
EIRP is calculated as:
EIRP(dBm) = P
TX
(dBm) – L(dB) + G
TX
(dBi)
where P
TX
is the output power of the transmitter, L is the path loss of the transmission line between
the transmitter and antenna, and G
TX
is the maximum gain of the transmit antenna. Consider the
following for each of these components:
 Output power:
o The output power setting of the NINA-B4 module. An end-product user must not be able to
increase the setting above the 10 dBm EIRP limit, by sending configuration commands etc.
o The operating temperature of the end-product. The output power of a transmitter is typically
increased as the ambient temperature is lowered. The operating temperature range of NINA-
B4 is -40 to +105 °C, and across this range the output power can typically vary by 1 dB. The
output power at the lowest operating temperature (yielding the highest output power) must
be considered for the EIRP calculation.
 Path loss – Long antenna cables or PCB traces, RF switches, etc. will attenuate the power reaching
the antenna. This path loss should be measured and taken into consideration for the EIRP
calculation.
 Antenna gain - The maximum gain of the transmit antenna must be considered for the EIRP
calculation.
2.1.3 Compliance with the RoHS directive