User Manual

6. RF Performance
6.1 Conducted Power Measurements
During measurements, the BRD4308D Radio Board was attached to a Wireless Starter Kit Mainboard which was supplied by USB. The
voltage supply for the Radio Board was 3.3 V.
6.1.1 Conducted Measurements in the 2.4 GHz Band
The BRD4308D Radio Board was connected directly to a Spectrum Analyzer through the on-board UFL connector. The RF output of
the module was set to the RF2G4_IO2 pin instead of the built-in antenna.
The supply for the module (VDD) was 3.3 V provided by the mainboard; for details, see the BRD4308D schematic. The transceiver was
operated in continuous carrier transmission mode. The output power of the radio was set to 10 dBm.
The typical output spectrum is shown in the following figure.
Figure 6.1. Typical Output Spectrum of the BRD4308D
As shown in the figure above, the fundamental is 10 dBm and all of the unwanted emissions are under the applied limits.
Note: The UFL connector introduces approximately 0.3 dB insertion loss.
BRD4308D Reference Manual
RF Performance
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