User Manual

6. RF Performance
6.1 Conducted Power Measurements
During measurements, the BRD4310A 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 Power Measurements with Unmodulated Carrier
The transceiver was operated in unmodulated carrier transmission mode. The output power of the radio was set to 0 dBm. The typical
output spectrums are shown in the following figures.
Figure 6.1. Typical Output Spectrum of the BRD4310A; PAVDD = 3.3 V
As shown in the figure above, the fundamental is slightly lower than 0 dBm and all of the unwanted emissions are under the applied
limits.
Depending on the applied modulation scheme, the measured power levels are usually lower compared to the results with unmodulated
carrier, so the levels of the harmonics will be lower if modulated transmission is used.
Note: The conducted measurement is performed by connecting the on-board UFL connector to a Spectrum Analyzer through an SMA
Conversion Adapter (P/N: HRMJ-U.FLP(40)). This connection itself introduces approximately 0.3 dB insertion loss.
BRD4310A Reference Manual
RF Performance
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