RFM63B Datasheet, PDF (86/90 Pages) List of Unclassifed Manufacturers – ISM TRANSCEIVER MODULE V1.1

ADVANCED COMMUNICATIONS & SENSING
RFM63B
7.6.12. FSK Spectrum in Europe
Figure 82 shows the minimal spectral occupation achievable in the European band, keeping in mind that the
minimum frequency deviation that a RFM63B receiver can accept is 33 kHz. If the companion receiver can bear
smaller frequency deviations, the range of modulation bandwidth can be further decreased.
Figure 82: FSK - 1.56kbps - +/-33 kHz
The default configuration of the RFM63B yields the bandwidth visible on Figure 83:
Figure 83: FSK - 25 kbps - +/-50 kHz
Figure 84 shows the maximal bit rate and frequency deviation that can fit in the 868 to 868.6 MHz European sub-
band:
Figure 84: FSK - 40 kbps - +/-40 kHz
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