nRF52840 DTM (Direct Test Mode)

[eyck lin]

Hi,

I would like to know how to process DTM test for nRF52840 BLE RF TX power, RX sensitivity ... etc.

If there is any test firmware, tools, command lines and application note or document for the DTM test mode to check RF function.

Looking for your forward,

Thank you.

BR, 

Eyck

[Andreas]

Hi,

 

You can find our DTM software in the SDK. This is made to be used with a BLE tester, issuing commands over UART. Alternatively you can use a nRF5 DK or nRFgo Studio, see this application note.

 

You might also want to check out our radio test example.

 

Best regards,

Andreas

[eyck lin]

Hi,

If there is any DTM command or test tools to support RX sensitivity function test.

I can see no document on support site about RX sensitivity test with direct test mode command.

BR,

Eyck

[Andreas]

Hi Eyck,

 

There is no DTM command for sensitivity testing, it would not make sense as you need the upper tester to run this (Packet error rate must be calculated). This must therefore be done by running a series of receiver tests commands, comparing what is received with what the upper tester has instructed to be transmitted. When measured conducted, adjusting atteuation (receiver input power) and logging PER, you will be able to determine the sensitivity.

Most testers have support for this, appearing as a single command. In order to use e.g. one of our DKs you need to script the test, adjust attenuation, retest and so on, this is described in this Application note.

 

Best regards,

Andreas