Data Sheet

Page 45
RFM95/96/97/98(W)
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WIRELESS & SENSING PRELIMINARY DATASHEET
It is therefore important to note that the setting of OokFixedThresh will be application dependant. The following procedure
is recommended to optimize OokFixedThresh.
Set RFM96/7/8 in OOK Rx mode
Adjust Bit Rate, Channel filter BW
Default OokFixedThresh setting
No input
signal
Continuous
Mode
Monitor DIO2/DATA pin
Increment
OokFixedThresh
Glitch activity
on DATA ?
Optimization complete
Figure 14. Floor Threshold Optimization
The new floor threshold value found during this test should be used for OOK reception with those receiver settings.
Optimizing OOK Demodulator for Fast Fading Signals
A sudden drop in signal strength can cause the bit error rate to increase. For applications where the expected signal drop
can be estimated, the following OOK demodulator parameters OokPeakThreshStep and OokPeakThreshDec can be
optimized as described below for a given number of threshold decrements per bit. Refer to RegOokPeak to access those
settings.