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CC2640R2L: Bluetooth transmit power abnormal

Cherry Zhou
Mastermind 22235 points
Part Number: CC2640R2L
Other Parts Discussed in Thread: CC2640, , LAUNCHXL-CC2650

Hi team,

Here's an issue from the customer may need your help:

I want to implement a simple bluetooth beacon app and found an anomaly in the transmit power during testing. When I tested last Monday, I set up sending 0dbm, but the actual test was 3dbm. After a week of re-measurement, the setting is to send 0dbm, and the actual test is 0dbm. The behavior is consistent every time you validate with your own application and SmartRF Studio 7 tools. My configuration was also generated with SmartRF Studio 7. Am I missing something that is not configured? Why do the same programs behave differently? Will it affect the stability of the product?

This is a Bluetooth send function

This is the RF CMD linked list

This is the CMD params linked list

Here are last week's test results

Here are this week's test results

In in-depth testing using SmartRF Studio 7, it was found that the configuration of the txpower of the CC2640EM-CXS and the LAUNCHXL CC2640 in RF Design Based On was inconsistent, and the actual emission intensity was also inconsistent. My actual product is CC2640R2L, which value should I refer to?

Thanks.

Best Regards,

Cherry