I'm measuring PPG on my wrist with AFE4404.
I look at the datasheet, 2A to 2C is LED1VAL, LED3VAL, LED2VAL.
But if you look at 2D to 2F, you get the value of ambient.
What is ambient?
I can get the value by lighting the LED from 2A to 2C, but where do you get the value from for 2D to 2F?
And what's the difference between 2D and 2F? If you look at the description of the two, it says ambient1 output, LED1-ambient1 output, so can you tell me the difference?