Data Sheet
CC1101
SWRS061B Page 71 of 93
0x15: DEVIATN – Modem Deviation Setting
Bit Field Name Reset R/W Description
7 Reserved R0
6:4 DEVIATION_E[2:0] 4 (0x04) R/W Deviation exponent
3 Reserved R0
2:0 DEVIATION_M[2:0] 7 (111) R/W When MSK modulation is enabled:
Sets fraction of symbol period used for phase change. Refer to the
SmartRF
®
Studio software [7] for correct deviation setting when using
MSK.
When 2-FSK/GFSK modulation is enabled:
Deviation mantissa, interpreted as a 4-bit value with MSB implicit 1. The
resulting frequency deviation is given by:
EDEVIATION
xosc
dev
MDEVIATION
f
f
_
17
2)_8(
2
⋅+⋅=
The default values give ±47.607 kHz deviation, assuming 26.0 MHz crystal
frequency.