Modify Tx Power in DTM mode via UART

[damienking]

Hi:

i use the application note nA34's python file (dtm.py) to perform DTM PER test among 2 nRf52840 DK.

and in the LE_Test_Setup command ( the only set command which upper tester can send to DUT for setting some parameters),

control bit 0x09 & parameters ( 8bits) can be used to set transmitter to the specified or nearest transmit power level: -127 to 20 dBm.

Question 1:

is it ok to set nRF52840's Tx power to this range -127~+20dBm? ( i am trying to find the Rx sensitivity, so i have to adjust the. tx power)

Question 2:

and how to read the receiver Rx power  by The UART command?

i didn't use the dtm.c to perform this test because i am not familiar with C, but i think they're doing the same thing?

thank you!!!

[JONATHAN LL]

Hi,

I think you want to look in the the Radio test Example, it might fit better you rest goals. 

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/peripheral/radio_test/README.html 

is it ok to set nRF52840's Tx power to this range -127~+20dBm?

The nRF52840 does not output +20dBm, max is +8dBm. 
TX power list here: https://infocenter.nordicsemi.com/topic/ps_nrf52840/radio.html?cp=4_0_0_5_19_13_46#register.TXPOWER 

and how to read the receiver Rx power  by The UART command?

Do you mean RX receiver sensitivity?

Regards,
Jonathan

[damienking]

Hi Jonathan,

yes, i mean RX receiver sensitivity.

thanks for your answer it's really helpful.

[JONATHAN LL]

damienking said:

i mean RX receiver sensitivity.

The DTM sample will provide a RX sensitivity result but that would be done with lab equipment like an Anritsu. 


https://infocenter.nordicsemi.com/pdf/nwp_006.pdf?cp=17_20 here is a white paper that does show a way to do it. 

Regards,
Jonathan