RFM63B Datasheet, PDF (30/90 Pages) List of Unclassifed Manufacturers – ISM TRANSCEIVER MODULE V1.1

ADVANCED COMMUNICATIONS & SENSING
Set RFM63B in OOK Rx mode Adjust
Bit Rate, Channel filter BW Default
RXParam_OOK_thresh setting No
input signal
Continuous Mode
Increment
MCParam_OOK_floor_thres
Monitor DATA pin
Glitch activity
on DATA ?
RFM63B
Optimization complete
Figure 23: Floor Threshold Optimization
The new floor threshold value found during this test should be the value used for OOK reception with those receiver
settings.
Note that if the output signal on DATA is logic “1”, the value of MCParam_OOK_floor_thres is below the noise floor
of the receiver chain. Conversely, if the output signal on DATA is logic “1”, the value of MAParam_floor_thres is
several dB above the noise floor.
3.4.10.2. Optimizing OOK Demodulator Response 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 RXParam_OOK_thresh_step and
RXParam_OOK_thresh_dec_period can be optimized as described below for a given number of threshold
decrements per bit RXParam_OOK_thresh_dec_period:
• 000 - once in each chip period (d)
• 001 - once in 2 chip periods
• 010 - once in 4 chip periods
• 011 - once in 8 chip periods
• 100 - twice in each chip period
• 101 - 4 times in each chip period
• 110 - 8 times in each chip period
• 111 - 16 times in each chip period
For each decrement of RXParam_OOK_thresh_step:
• 000 - 0.5 dB (d)
• 001 - 1.0 dB
• 010 - 1.5 dB
• 011 - 2.0 dB
• 100 - 3.0 dB
• 101 - 4.0 dB
• 110 - 5.0 dB
• 111 - 6.0 dB
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