14.3.5.3 Data Interpretation

The PHY_ED_LEVEL is an 8-bit register. The ED_LEVEL value of the AT86RF212B has a valid range from 0x00 to 0x54 with a resolution of 1.03dB. Values 0x55 to 0xFE do not occur and a value of 0xFF indicates the reset value.

Due to environmental conditions (temperature, voltage, semiconductor parameters, etc.) the calculated ED_LEVEL value has a maximum tolerance of ±6dB, this is to be considered as constant offset over the measurement range.

An ED_LEVEL value of zero indicates a receiver RF input power less than or equal to RSSIBASE_VAL; a value of 84 indicates an input power equal to or larger than RSSIBASE_VAL + 87dB.

The receiver input power can be calculated as follows:

PRF[dBm] = RSSIBASE_VAL[dBm] +1.03[dB] x ED_LEVEL

Figure 14-36. Mapping between ED Value and Receiver Input Power