Data Sheet

CC1101
SWRS061B Page 78 of 93
0x1C: AGCCTRL1 – AGC Control
Bit Field Name Reset R/W Description
7 Reserved R0
6 AGC_LNA_PRIORITY 1 R/W Selects between two different strategies for LNA and LNA 2
gain adjustment. When 1, the LNA gain is decreased first.
When 0, the LNA 2 gain is decreased to minimum before
decreasing LNA gain.
5:4 CARRIER_SENSE_REL_THR[1:0] 0 (00) R/W Sets the relative change threshold for asserting carrier sense
Setting Carrier sense relative threshold
0 (00) Relative carrier sense threshold disabled
1 (01) 6 dB increase in RSSI value
2 (10) 10 dB increase in RSSI value
3 (11) 14 dB increase in RSSI value
3:0 CARRIER_SENSE_ABS_THR[3:0] 0
(0000)
R/W Sets the absolute RSSI threshold for asserting carrier sense.
The 2-complement signed threshold is programmed in steps of
1 dB and is relative to the MAGN_TARGET setting.
Setting Carrier sense absolute threshold
(Equal to channel filter amplitude when AGC
has not decreased gain)
-8 (1000) Absolute carrier sense threshold disabled
-7 (1001)
7 dB below MAGN_TARGET setting
… …
-1 (1111)
1 dB below MAGN_TARGET setting
0 (0000)
At MAGN_TARGET setting
1 (0001)
1 dB above MAGN_TARGET setting
… …
7 (0111)
7 dB above MAGN_TARGET setting