Revision 1.0 STD – February 2010
Page 18 of 31
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SX1233SKA
USER GUIDE
5.3.5
5.3.1
5.3.2
5.3.4
Figure 18: Receiver Configuration Register Tab
5.3.1 Rx Bandwidth
The Rx Bandwidth, RxBw, window is illustrated below. For optimum performance in FSK mode when
operating with a modulation index > 2, the DCC frequency is recommended to be approximately 4% of
the receiver bandwidth, RxBw. The GUI will automatically set the appropriate DCC frequency based upon
the setting of RX filter bandwidth.
Figure 19: Rx Bandwidth Window
For operation with low modulation index signals, it is recommended that the user follows the
recommendations for setting the correct DCC bandwidth that can be found in the SX1233 datasheet.
5.3.2 LNA Gain Window
The LNA gain window provides the status of the configured LNA gain. The gain can be configured
automatically or manually. In automatic mode the LNA gain is set based upon the RSSI value. In manual
mode, the gain should be set according to the expected signal power.
Note that the AGC reference threshold is set according to:
