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Hi
We use Luis Fernando Rodríguez S's script to verify the silent detection function via INT1, it works.
We have some questions about AGC configuration need your help:
1. We only need the silent detection function, and we hope that the original input signal will not be affected by the AGC feature. Do you have any suggestion AGC configuration for us?
2. Regard the AGC interrupt feature, we observed that it seems only trigger interrupt when the signal power was lower than Noise Threshold.
Our question is :
If we got an interrupt(signal power was lower than Noise Threshold) , then when the ambient noise increases(Signal power is greater than Noise Threshold), is there any method to let us know about this event.
Thanks.
BR
Trevor
Hi Trevor, our CODEC expert is out on holiday until Jan 3rd.
thank you for your patience in the mean time.
Regards,
Arthur
Hi,
I'm not familiar with Luis' script, what it does and can you send it to me?
There's an apps. note on AGC below, have you taken a look?
Regards,
Peter
Hi Peter,
Thanks for your replay, we have reviewed the apps note.
Regarding script, you could refer to the following link:
But our questions doesn't related to the above script, could you help to check our questions?
BR
Trevor
Hi Trevor,
1. Maybe this will work for your application, use the AGC Noise Threshold and set target as the input signal if this is known. The AGC threshold flag will set the gain to 0dB so if the path is 0dB it'll likely not changing the input level thus you can use the flag as indicator.
2. Yes, that is what AGC Noise Threshold Flag is for.
There are 2 flags for this sticky flag (page 0 register 45) and non-sticky flag (page 0 register 47), use either one that fits your application.
Regards,
Peter