Can I always use highest TXP for nRF7002?

[Ziyao Zhou]

Hi

I notice there is a statement in nRF7002 dts:

	nrf70_tx_power_ceiling: nrf70_tx_power_ceiling_node {
		status = "okay";
		compatible = "nordic,nrf700x-tx-power-ceiling";
		max-pwr-2g-dsss = <0x54>;
		max-pwr-2g-mcs0 = <0x40>;
		max-pwr-2g-mcs7 = <0x40>;
		max-pwr-5g-low-mcs0 = <0x24>;
		max-pwr-5g-low-mcs7 = <0x24>;
		max-pwr-5g-mid-mcs0 = <0x2C>;
		max-pwr-5g-mid-mcs7 = <0x2C>;
		max-pwr-5g-high-mcs0 = <0x34>;
		max-pwr-5g-high-mcs7 = <0x34>;
	};
};

I am wondering if I could always use the highest TXP 0x54 for all modulation indices to achieve optimal communication for my application.

[Simonr]

Hi

You should not exceed the nominal transmitter characteristics (table 5 in this page of the nRF7002 PS), as there is a different nominal transmit power for the various modulation rates.

https://docs.nordicsemi.com/bundle/ps_nrf7002/page/chapters/elspec/doc/electrical_specification.html 

Best regards,

Simon

[Ziyao Zhou]

If I want highest performance, could I change  max-pwr-5g-high-mcs7 = <0x34> to 0x54, is this TXP limitation defined by regulation or the physical amplifer on board?

Thank you!