AGC Threshold Level

HI Sleepy2025 

The selected thresholds of –27 dBFS (overload) and –30 dBFS (underload) are indeed quite close together. The AGC’s Peak Detector logic struggles with such narrow margins, especially since it relies on consistent peak measurements. Increase the gap between thresholds to improve detection reliability—e.g., –15 dBFS (overload) and –40 dBFS (underload). This gives the AGC more dynamic range for decision-making and avoids the “stuck at minimum gain” issue.

Setting lowThreshPreventGainInc = false is essential to allow gain increases when input is low.

Regards,

SJ

Hello SJ,

Thank you for your prompt answer.

I' ll try it soon.

Regards,

Hi Sleepy2025 ,

There is a known issue with the AGC, please follow the thread: 

(+) What does apdUpperThreshPeakExceededCnt actually count? - Q&A - Design Support ADRV9001 – ADRV9007 - EngineerZone

This issue has been noted and necessary changes will be done in the future sdk. 

Regards

Rahul

Hello Rahul,

Thank you for very useful information.

I hope this issue will be resolved soon.

Regards,