Specifications

CC
1100E
SWRS
082
Page
79
of
92
0x1C: AGCCTRL1
–
AGC C
ontrol
Bit
Field Name
Reset
R/W
Description
7
R0
Not used
6
AGC_LNA_PRIORITY
1
R/W
S
elects 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 chan
ge 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