DECT NR+ rssi-1 measurement results saturated

[dame]

Hello,

I am measuring RSSI values with nrf_modem_dect_phy_rssi(...) from the DECT PHY firmware.

The nrf_modem_dect_phy_rssi_event refers to positive values being saturated:

/**
* @brief RSSI measurements, in dBm.
*
* If a symbol is measured, its measurement is in the interval [-140, -1].
* If the measurement is saturated, the measured signal strength is reported
* as a positive integer. If a symbol is not measured, its value is reported
* as @ref NRF_MODEM_DECT_PHY_RSSI_NOT_MEASURED.
*/

Is there an exact definition for what saturated values are?

[Syed Maysum Abbas Zaidi]

Hi,

For RSSI, a normal reading is a negative number between -140 and -1 dBm. 0 means that symbol wasn’t measured. If you see a positive number, the modem still reports a measured value, but it marks it as saturated meaning the real signal is stronger than −(that positive number) dBm and could be even stronger. It can’t be weaker than that, because then it would have fit in the normal -140 to -1 range.

I hope that helps.

Best Regards,
Syed Maysum