CC2340R5: While testing with HCI TX transmitter test, negative TX power values were measured.

YW Lin

Part Number: CC2340R5

Hi TI members,

Below is my building environment:

Software	Version
Code Composer Studio	12.4.0.00007
SimpleLink SDK	7.20.01.10
XDCtools	3.62.1.16_core

We have used basic_ble_ptm to do the RF testing with HCI commands, such as HCI_LE_TransmitterTest and HCI_LE_TestEnd.

While stress testing the DUT, we observed several negative values in TX power, and needed to reset the chip to get rid of the situation.

Within a 100 times testing, we could observed this issue for about 5 times, and they all occurred randomly.

Plus, no matter low/high/middle channel, the phenomenon was only observed in TX power, while we tested both TX and RX transmitter test.

We would like to know if there are any configurations we can modify or how can we resolve this issue?

Please help us identify the problem.

Thanks.

BR,

YuWen

over 1 year ago

0 Clément over 1 year ago

TI__Guru** 101460 points

Hi YuWen,

Thank you for reaching out.

Could you please specify if these tests are run at room temperature (~25 C)?

The upcoming SDK 7.40 implements a few elements to have more stable TxPower. The release of this SDK is planned by the end of 2023.

In case a fix for this behavior is required before then, please reach out to your local support team.

Best regards,

0 YW Lin over 1 year ago in reply to Clément

Intellectual 540 points

Hi Clément,

Could you please specify if these tests are run at room temperature (~25 C)?

-> Yes, we are running these tests at room temperature. In our factory, it would be around 15~25 °C.

Thanks.

BR,

YuWen

0 KueiChun Yu over 1 year ago in reply to Clément

Prodigy 20 points

Hi Clément,

Would it be possible to share an estimated release time?

Thank you,

KueiChun

0 Clément over 1 year ago in reply to KueiChun Yu

TI__Guru** 101460 points

Hi,

The SDK 7.40 release is expected to be by the end of the year. Our teams are doing their best to have the SDK released this week.

Regards,

0 Yu Chen over 1 year ago

Prodigy 20 points

Hi Clement,

This is partner with YuWen, may I know if there is solid validation data over lots of silicon about TxPower, and if any extreme condition test data reference will be outcoming?

Thanks

Best, Wilson

0 Clément over 1 year ago in reply to Yu Chen

TI__Guru** 101460 points

Hi,

At the hardware level, the CC2340R5 is tested across multiple units and multiple conditions (various temperature and supply voltage mainly).

Here, the issue I suspect is actually coming from the software (missing initialization of one data instance).

Best regards,

Bluetooth®︎

Bluetooth forum

CC2340R5: While testing with HCI TX transmitter test, negative TX power values were measured.