Receiver blocking test for 802.15.4 on nRF52840

[Jon]

Hello,

I am trying to set up for Receiver blocking test for a product that uses both BLE and 802.15.4. The HW is an nRF52840 along with an nRF21540 FEM. I have a couple of questions:

1. From this ticket:  EN 300 328 V2.1.1 Receiver Blocking Test Setup it was suggested that we make modifications to the DTM tool to use 250Kps radio mode. The suggestions made do not apply to the current DTM sample code in NCS. Are there any updated instructions available to modify DTM to support IEEE802.15.4?

2. Does the DTM sample fully support the nRF21540 FEM, and if so, is there anything special I need to do configure DTM to use the FEM?

Thanks,

Jon

[Jon]

Note: I tried changing the following line (line 394) in dtm.c in the direct_test_mode sample from:

        .radio_mode = NRF_RADIO_MODE_BLE_1MBIT,

to

        .radio_mode = NRF_RADIO_MODE_IEEE802154_250KBIT,

...but with that change I can not longer successfully transfer packets between two DUT's with the python PER script.

[ovrebekk]

Hi Jon

1. From this ticket:  EN 300 328 V2.1.1 Receiver Blocking Test Setup it was suggested that we make modifications to the DTM tool to use 250Kps radio mode. The suggestions made do not apply to the current DTM sample code in NCS. Are there any updated instructions available to modify DTM to support IEEE802.15.4?

The ticket you refer to is a bit outdated at this point. 

DTM is essentially a Bluetooth standard, and is not designed to handle testing on PHY's not supported by Bluetooth. 

A more generic example which supports both 802.15.4 and the nRF21540 is the radio test example in NCS, and I recommend you run your testing with this one instead. 

Best regards
Torbjørn