Question about nRF9151's AT%XMIPIRFFECTRL command's frequency parameter

[RongLinQin]

Hi Nordic support:

      Our project uses the nRF9151 and QM13545 MIPI RF SWITCH. We have a question about AT%XMIPIRFFECTRL command's frequency: If the frequency switching point of the RF switch is set in the middle of a band, can it work normally? For example, the uplink frequency range of Band 2 is 1850MHz-1910MHz, and the downlink frequency range is 1930MHz-1990MHz. We set RF switch SW1 to  1850MHz-1910MHz and SW2 to 1930MHz-1990MHz, set the frequency switching point of SW1 and SW2 to 1920MHz. In this case, can SW1 and SW2 switch normally during LTE transmits and receives data simultaneously in Band2?

      Thanks!

BRs,

Qin, Rong-Lin

[Simonr]

Hi

We will need to get back to you later this week with a proper update on this ticket, as our cellular expert is out of office today. We hope to have an update for you tomorrow, or by latest on Friday the 28th. For reference, the XMIPIRFFECTRL AT command is explained in detail here: https://docs.nordicsemi.com/bundle/ref_at_commands_nrf91x1/page/REF/at_commands/sip_pin_configuration/xmipirffectrl_set.html 

Thank you for your patience,

Simon

[Michal]

Hello,

Sorry for the delay, I was partially out of office for a week.

You can look here for an example config: https://docs.nordicsemi.com/bundle/nwp_034/page/WP/nwp_034/on.html

In general it should work I think.

nRF9151 supports only half-duplex communications, which means that it will switch between RX and TX anyway.

Best regards,

Michal