AWR1843: Question about ANA#11 TX, RX Gain Calibrations Sensitive to Large External Interference

Allen35065

Part Number: AWR1843

Hi Expert,

Customer reported the background noise is not stable on AWR1843 and we see from silicon errata about ANA#11 TX, RX Gain Calibrations Sensitive to Large External Interference.

From the guide, it says The incident power detector in the TX output power detector, along with the absolute level of the PA loopback used during the PA loopback monitors, are insensitive to this, and they can be used to check that the calibrations converged correctly. Calibration can be re-run if large interference was observed.

I want to know how to read the power detector results and how to re-run the calibration. I searched in the RF interface user guide and SDK source code but did not find related information. Could you please help to suggest where to find detailed document or example code?

Thanks a lot.

Regards,

Allen

over 5 years ago

0 Raghunandan Kamath over 5 years ago

TI__Mastermind 22155 points

Allen,

There is no direct way to read the power detector results. The power detector measurements are reported if the monitoring features are enabled on the device. In case the calibration fails due to any interference the failures of the calibration are indicated in the calibration status async event.

Do you see any failure in the calibration?

-Raghu

0 Allen35065 over 5 years ago in reply to Raghunandan Kamath

TI__Expert 4015 points

Hi Raghu,

If so, we don't see failure in boot time calibration. Does latest firmware support to read back RX noise figure value? It looks like this function is not supported in mmwave SDK 3.3.

Regards,

Allen

0 Raghunandan Kamath over 5 years ago in reply to Allen35065

TI__Mastermind 22155 points

Allen,

The RX noise figure monitor is not supported for the AWR1843(Gen1 device).

-Raghu

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AWR1843: Question about ANA#11 TX, RX Gain Calibrations Sensitive to Large External Interference