Silicon Laboratories SI4421 - Manual (Page 37)

Si4421
BER Curves in 433 MHz Band:
10 -6
10 -5
10 -4
10 -3
10 -2
10 -1
1
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
57.6k
115.2k
-120 -115 -110 -105 -100 -95 -90
BER Curves in 868 MHz Band:
10 -6
10 -5
10 -4
10 -3
10 -2
10 -1
1
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
57.6k
115.2k
-115 -110 -105 -100 -95 -90 -85
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 2.4 kbps 4.8 kbps 9.6 kbps 19.2 kbps 38.4 kbps 57.6 kbps 115.2 kbps
BW=67 kHz
f
FSK
=45 kHz
BW=67 kHz
f
FSK
=45 kHz
BW=67 kHz
f
FSK
=45kHz
BW=67 kHz
f
FSK
=45 kHz
BW=67 kHz
f
FSK
=45 kHz
BW=134 kHz
f
FSK
=90 kHz
BW=134 kHz
f
FSK
=90 kHz
BW=200 kHz
f
FSK
=120 kHz
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