Test nRF52840 of output power fails with Anritsu MT8852B

RE: Test nRF52840 of output power fails with Anritsu MT8852B

Kenneth — Tue, 16 Apr 2019 11:35:32 GMT

Thanks for the update, let me know how it goes.

Best regards,
Kenneth

RE: Test nRF52840 of output power fails with Anritsu MT8852B

bonnet — Tue, 16 Apr 2019 08:28:52 GMT

devzone.nordicsemi.com/.../TestMT8852B.xlsx

We connected a Salae logic analyzer on the UART lines and got the traces contained in the above Excel file.

Mr Harrison from Anritsu told us that he has seen the problem before. We need to send the command

LE1MCMDVER 1. We shall debug with a new logger software from Anritsu.

RE: Test nRF52840 of output power fails with Anritsu MT8852B

Kenneth — Mon, 15 Apr 2019 17:44:33 GMT

Hi,

I suggest you hook up a logic analyzer and look at the UART commands and responses, you should see activity as per the DTM spec in the BT core spec. If you have a DK you can use that for comparison and/or verification. It may be a voltage and/or baudrate issue.

Best regards,
Kenneth

RE: Test nRF52840 of output power fails with Anritsu MT8852B

bonnet — Mon, 15 Apr 2019 13:33:21 GMT

Hi Kenneth,

Yes we used the DTM code and we add a interface module to use our UART test pin.

As said above, the RX tests are OK but for the TX tests, the Anritsu does not detect any packets

I see that the Anritsu commands (following the BT core spec) do not set the TX power.

Does the DTM code use the default 0dBm TX power ?

Should we use the dtm_set_txpower to set the power ?

I am from the HW team, I do not have the code with me.

I try to get it from the SW engineer.

RE: Test nRF52840 of output power fails with Anritsu MT8852B

Kenneth — Mon, 15 Apr 2019 13:25:00 GMT

Hi,

Have you flashed the DTM code?
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_dtm_serial.html?cp=5_0_4_5

Best regards,
Kenneth