case about dtm and RF Channel

RE: case about dtm and RF Channel

peter.min — Mon, 13 Jun 2022 09:03:43 GMT

Hi Kenneth,

I have understood the relevant issues

Signaling and nonsignaling differ in whether an instruction constitutes a loop

Thank you for all your assistance.
Kind regards,
Peter.Min

RE: case about dtm and RF Channel

Kenneth — Wed, 08 Dec 2021 14:19:10 GMT

I assume the actual frequencies you want to test depend on your product, e.g. for a Bluetooth low energy product they typically test lowest, middle, and highest used frequency used by Bluetooth low enery, this is channel 2 (=2.402GHz), 40, and 80.

Best regards.
Kenneth

RE: case about dtm and RF Channel

peter.min — Wed, 08 Dec 2021 03:49:14 GMT

Hi Kenneth,

1. I know of two current test examples.

2. Can you give an answer to 5.6

Thank you for all your assistance.
Kind regards,
Peter.Min

RE: case about dtm and RF Channel

Kenneth — Tue, 07 Dec 2021 14:38:46 GMT

Hello,

I assume what you are interested in here is performing radio tests for instance to test radio performance and/or at a test house to measure output power and spurious emissions. In that case I suggest to use the radio test example project:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/nrf_radio_test_example.html

In the above radio test example you control the nRF52833 through a UART interface to set it up to different test modes. It is also possible to make fixed test firmware without UART interface as for instance shown here:

devzone.nordicsemi.com/.../main-_2800_2_2900_.c

Since you are using the nRF52833 you should open the \examples\peripheral\radio_test\pca10100\blank project.

There is also a DTM example project in the nRF5 SDK, however DTM will only run commands specified by BT Sig (described in Bluetooth® Core Specification: Version 5.2, Vol. 6, Part F.), for instance to measure electrical parameters are according the BT spec, however DTM commands are typically not used by a test house to test radio regulations.

Best regards,
Kenneth