RE: nrf9160 power consumption in PS

JONATHAN LL — Fri, 30 Apr 2021 08:51:30 GMT

Pleas verify the answer if it was satisfactory, so that others that searches for the same topic can se that tis post has a verified answer.
Regards,
Jonathan

RE: nrf9160 power consumption in PS

Mmcharfi — Thu, 29 Apr 2021 10:22:23 GMT

Thanks I clearly understand now.

RE: nrf9160 power consumption in PS

JONATHAN LL — Thu, 29 Apr 2021 08:30:17 GMT

Hello,

What is stated in the PS is the subframe (TX/RX parameter), so that tells the current usage in the moment it transmits sate or communicates with the network. When it is don then the modem will most likely go into DRX mode( DRX is also in RRC connected mode), that means that it will listen to the network in intervals. that interval(cDRX) can be configured in OPP.

If the network dos not support DRX then the modem will be in RX mode constantly. RX consumes around 45mA. it is stated in the following line in the PS:

I_{RX_-90DBM}

RX subframe, Pin -90 dBm

So that would give you a worst case scenario of 45mA, in the case of no form of power saving(DRX).

The number you refer to is TX/RX subframe and it is mostly TX(80%) so that is why the current is so high.

Pout 23 dBm, BPSK, 1SC, 3.75 kHz, TX 80% RX 10% ("TX intensive"), 
RMC settings as per 3GPP TS 36.101 Annex A.2.4

Regards,
Jonathan