? Bit 3:0 - RX_PDT_LEVEL
The register bits RX_PDT_LEVEL desensitize the receiver in steps of 3dB.
Table 9-2. RX_PDT_LEVEL.
Register Bits
RX_PDT_LEVEL
Value
0x00
0x0F
Description
Maximum RX sensitivity
RX input level > RSSI_BASE_VAL + 3 x 14
These register bits desensitize the receiver such that frames with an RSSI level below
the RX_PDT_LEVEL threshold level (if RX_PDT_LEVEL > 0) are not received. For a
RX_PDT_LEVEL > 0 value the threshold level can be calculated according to the
following formula:
P RF [dBm] > RSSI BASE_VAL + 3 x (RX_PDT_LEVEL - 1)
Examples for certain register settings are given in Table 9-3 .
Table 9-3. Receiver Desensitization Threshold Level – RX_PDT_LEVEL.
Register Value
0x0
0x1
0xE
0xF
RX Input Threshold Level
disabled, maximum RX sensitivity
> RSSI_BASE_VAL + 3 x 0
> RSSI_BASE_VAL + 3 x 13
> RSSI_BASE_VAL + 3 x 14
Value [dBm]
RSSI value not considered
> -91
> -52
> -49
If register bits RX_PDT_LEVEL = 0 (reset value) all frames with a valid SHR and PHR
are received, independently of their signal strength.
If register bits RX_PDT_LEVEL > 0, the current consumption of the receiver in states
RX_ON and RX_AACK_ON is reduced to I RX_ON_L0 = 11.3mA (typ.), refer to
Section 12.8 .
102
AT86RF232
8321A – MCU Wireless – 10/11
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