SI47XX-EVB Datasheet, PDF (88/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
Figure 69. FM Configuration Helper Window (RSSI Based Blend)
In the example shown in Figure 69, the Current Level marker shows that Stereo % is 56%. RSSI threshold is
programmed as 30 dBµV (and below) for full mono and 49 dBµV (and above) for full stereo. RSSI reported by the
part is in between the thresholds however the final blend percentage is determined by SNR and the stereo level is
56%. Multipath does not factor in here as it is at a level that would set the part in full stereo. The graph shows the
current state of RSSI(green diamond), SNR (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.
88
Rev. 0.8