RE: In DTM test ,nrf21540 out power is difference on Different frequencies

david@2024 — Wed, 09 Oct 2024 02:20:56 GMT

1.These plots are for the default 20 and 10dB gain settings using the MODE pin.

the MODE pin is setting to 1,use default 10dB gain.

2.What does tx_power 0 and 2 refer to? output power from the SoC?

yes,it from soc output power

RE: In DTM test ,nrf21540 out power is difference on Different frequencies

Bendik Heiskel — Mon, 30 Sep 2024 13:47:21 GMT

Hi,

The nRF21540 does not have linear TX gain over the 2.4GHz frequency band:

These plots are for the default 20 and 10dB gain settings using the MODE pin.

[quote user=""]

[/quote]

What does tx_power 0 and 2 refer to? output power from the SoC?

[quote user=""]The DTM example I am using is nRF5_SDK_17.1.0_de560 \ examples \ dtm \ direct_test_made \ pca10112[/quote]

The nRF21540 has very limited support in the old nRF5 SDK, I highly recommend you switch to the nRF Connect SDK. For RF testing it is best to use the radio test sample instead of DTM, as it is easier to use for this type of testing.
Can you redo the measurements using this sample instead?

Best regards,

Bendik