As it can be observed, the BLE 125 Kb/s coded modulation scheme has the lowest relaxation factors. These values will be used as the
worst case relaxation factors for the radiated measurements.
5.4 Radiated Power Measurements
The output power of the EFR32MG24 was set to 10 dBm. The board was supplied through its USB connector by connecting to a PC
through a USB cable.
During the measurements the board was rotated in three cuts, see the reference plane illustration in the figure below. The radiated
powers of the fundamental and the harmonics were measured with horizontal and vertical reference antenna polarizations.
Y
X
Z
Figure 5.3. DUT Reference Planes
5.4.1 Maximum Radiated Power Measurement
The transceiver was operated in unmodulated carrier transmission mode, the output power of the radio was set to 10 dBm. The results
are shown in the table below.
The correction factors are applied based on the BLE 125 Kb/s coded modulation, showed in section
. For the rest of the supported modulation schemes the correction factors are larger, thus the related calculated margins would
be higher compared to the ones shown in the table below. Thus the below margins can be considered as worst case margins.
Table 5.5. Maximums of the Measured Radiated Powers of BRD2601B
Frequency
(2445 MHz)
Measured Un-
modulated EIRP
[dBm]
Orientation
BLE 125 Kb/s Coded Modulation
Limit in EIRP
[dBm]
Correction Fac-
tor [dB]
Calculated
Modulated EIRP
[dBm]
Modulated Mar-
gin [dB]
Fund
10.6
XY/H
NA (0 is used)
10.6
19.4
30
2nd
-55.9
YZ/H
-2.7
-58.9
17.7
-41.2
3rd
-41.8
YZ/H
-4.8
-46.6
5.2
-41.2
4th
<-50
*
-/-
-5.5
-
>20
-30
5th
-44.2
YZ/H
-6.3
-50.5
9.3
-41.2
* Signal level is below the Spectrum Analyzer noise floor.
As it can be observed the radiated power levels with modulation are below the applied limits.
UG524: xG24 Dev Kit User's Guide
Radio
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