14.3.4.3 Data Interpretation
The RSSI value is a 5-bit value in a range of zero to 28, indicating the receiver input power in steps of about 3.1dB.
A RSSI value of zero indicates a receiver RF input power less than or equal to PRF ≤ RSSIBASE_VAL. For a RSSI value in the range of one to 28, the RF input power can be calculated as follows:
PRF[dBm] = RSSIBASE_VAL[dBm] + 3.1[dB] x RSSI
The value RSSIBASE_VAL itself depends on the PHY mode. For typical conditions, it is shown in the table below.
| PHY Mode | RSSIBASE_VAL [dBm] |
|---|---|
| BPSK with 300kchip/s | -100 |
| BPSK with 600kchip/s | -99 |
| O-QPSK with 400kchip/s, SIN and RC-0.2 shaping | -98 |
| O-QPSK with 400kchip/s, RC-0.2 shaping | -98 |
| O-QPSK with 1000kchip/s, SIN shaping | -98 |
| O-QPSK with 1000kchip/s, RC-0.8 shaping | -97 |
