nRF9151 retrieve cellular TX Power

[klaasg]

Hi,

We are integrating the nRF9151 in our app. The %CONEVAL command has a field <tx_power>.

This looks interesting to us, because it can help us estimate our current consumption. However, we are avoiding the %CONEVAL command because it does some network operation and can take a very long time.

Is there any other way to retrieve the modem TX power? And the same for the number of tx/rx repetitions?

[Øyvind]

Hello, 

The TX power is an estimate based on the network connection, and is defined by the 3GPP.  From CONEVAL documentation:

<tx_power>

Integer, –45 to +23 dBm.

The estimate of TX power depends on the RRC state in which the measurement is taken.

If <rrc_state> is 0, the value corresponds to the estimated TX power level of the first preamble transmission in (N)PRACH.

If <rrc_state> is 1, the value corresponds to the latest physical data channel (N)PUSCH transmission power level.

See 3GPP 36.101 and 3GPP 36.213.

Unfortunately, there isn't any other solution for retrieving TX power from the modem. Our sales team inform me that they have been in contact with your R&D manager regarding this issue at an earlier stage. 

Kind regards,
Øyvind