How to get Packet Reception Ratio in nRF54L15

RE: How to get Packet Reception Ratio in nRF54L15

Ziyao Zhou — Mon, 07 Apr 2025 11:23:49 GMT

Got it! Thank you so much!

RE: How to get Packet Reception Ratio in nRF54L15

Håkon Alseth — Mon, 07 Apr 2025 07:43:47 GMT

Hi,

[quote user="Ziyao Zhou"]The result (1899383.467bps) is different from the Bluetooth: Throughput (1396017bps). Is this because the radio_test eliminated the influence of the header?[/quote]

radio_test will setup a transmit only stream, while bluetooth LE will use the protocol, including on-air ACKing, timing-wise scheduling, and changing RF channel.

[quote user="Ziyao Zhou"]Another question would be what is the difference between 4MBIT_BT_0_6 and 4MBIT_BT_0_4，the result is close around 3.8Mbits, what is the difference between BT=0.6 and 0.4? When would it be available for practical use?[/quote]

The difference is the GFSK filter parameter in these two modes, the throughput will be equal/similar.

[quote user="Ziyao Zhou"]I just find some time to test the radio_test but there is no result telling me the PRR, does it mean I need to check the pattern by myself and caluculate the PRR?[/quote]

You can setup for instance 1000 packets to be sent, and you can get the status on the receiver end, by providing a number to the "start_tx_modulated_carrier" cmd:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/peripheral/radio_test/README.html#user_interface

Kind regards,

Håkon

RE: How to get Packet Reception Ratio in nRF54L15

Ziyao Zhou — Sat, 05 Apr 2025 06:57:41 GMT

Hi,

I just find some time to test the radio_test but there is no result telling me the PRR, does it mean I need to check the pattern by myself and caluculate the PRR?

In addition, I use the radio_test to test the throughput of the BLE_2Mbits code, I transmit the default 256 bytes packet in one minutes and calculate. The result (1899383.467bps) is different from the Bluetooth: Throughput (1396017bps). Is this because the radio_test eliminated the influence of the header?

Another question would be what is the difference between 4MBIT_BT_0_6 and 4MBIT_BT_0_4，the result is close around 3.8Mbits, what is the difference between BT=0.6 and 0.4? When would it be available for practical use?

The trend I get is like this

Thank you so much for your help!

RE: How to get Packet Reception Ratio in nRF54L15

Håkon Alseth — Fri, 04 Apr 2025 06:06:52 GMT

Happy to help out! please let me know if you run into any issues or have questions.

Kind regards,

Håkon

RE: How to get Packet Reception Ratio in nRF54L15

Ziyao Zhou — Thu, 03 Apr 2025 12:41:39 GMT

Thank you so much for your information!

RE: How to get Packet Reception Ratio in nRF54L15

Håkon Alseth — Thu, 03 Apr 2025 12:10:57 GMT

Hi,

I am not sure which physical (PHY) parameter you are specifically after here, but direct_test_mode can provide information related to the RX PHY evaluation.

radio_test can also be setup in such a mode.

Kind regards,

Håkon