SI47XX-EVB Datasheet, PDF (87/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
Figure 68. FM Configuration Helper Window (SNR Based Blend)
In the example shown in Figure 68, the Current Level marker shows that Stereo % is 56%. SNR threshold is
programmed as 14 dB (and below) for full mono and 30 dB (and above) for full stereo. Since the SNR reported by
the part is in between the thresholds, the stereo level is 56%. RSSI and Multipath do not factor in here as they are
both at levels that would set the part in full stereo. The graph shows the current state of SNR (green diamond),
RSSI (white diamond), and multipath (yellow diamond) and plots for each of them that show the transition between
high and low thresholds and how the blend would be adjusted accordingly. You can adjust the configuration values
to see how these plots and the current state of blend would change.
Rev. 0.8
87