RFM12B_15 Datasheet, PDF (37/41 Pages) List of Unclassifed Manufacturers – Universal ISM Band FSK Transceiver

BER Curves in 433 MHz Band:
RFM12B
1
10^-1
10^-2
10^-3
10^-4
10^-5
10^-6
-120 -115
-110
-105 -100
-95
-90
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
57.6k
115.2k
BER Curves in 868 MHz Band:
1
10^-1
10^-2
10^-3
10^-4
10^-5
10^-6
-115 -110
-105
-100
-95
-90
-85
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
57.6k
115.2k
The table below shows the optimal receiver baseband bandwidth (BW) and transmitter deviation frequency (δf FSK ) settings for
different data-rates supposing no transmit receive offset frequency. If TX/RX offset (for example due to crystal tolerances) have to be
taken into account, increase the BW accordingly.
1.2 kbps
BW=67 kHz
δf_FSK =45 kHz
2.4 kbps
BW=67 kHz
δf_FSK =45 kHz
4.8 kbps
BW=67 kHz
δf_FSK =45kHz
9.6 kbps
BW=67 kHz
δf_FSK =45 kHz
19.2 kbps
BW=67 kHz
δf_FSK =45 kHz
38.4 kbps
BW=134 kHz
δf_FSK =90 kHz
57.6 kbps
BW=134 kHz
δf_FSK =90 kHz
115.2 kbps
BW=200 kHz
δf_FSK =120 kHz
37
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