Set the bandwidth to 3.75KHz

[con2021]

Hi,

I would like to know how to set the service to NB-IOT Cat NB1,

and how then to set the UL subcarrier spacing to 3,75 KHz,

and how to fix the power to 23 dBm, not to 20 dBm, even in power save mode.

Thanks,

BR

[con2021]

Is that a limitation in the NRF9160 modem or is it network choice based on the standard? can we expect a possibility in future?

Yes if possible, I appreciate your support. I would like to know if 3.75 or 15KHz lead to more current consumption and/or data usage. We might figure out how to push the BS to set our connection to only one of these techniques

[Heidi]

Hi again, this is a network choice based on the standard. No, I don't think this is subject to change.

With regard to the current and data consumption, the honest answer is we don't know. This depends on your use case; expected data throughput requirements and also radio conditions.

Without solid evidence, we can maybe guess that it is typically more efficient to push data quickly into the air and then go to sleep. At least if the saving won't be spoiled by several retransmissions.

The transmitter is the power-hungry component in the modem and furthermore, the long transmission prevents the modem from going to sleep.