Dear all,
I am a newbie of the DSP programer. And, I try to set a system of pulse oximeter.
Now, it can work by the sourse code. But I still have some questions about it:
1) What's the signal that display on the LCD? The document said the graph is plethysmogram.
what does it mean? Does it mean that is the light intensity of the photodiode receive?
2)If yes, why its period that between the spot and spot that display on the screen in the pc application is 4ms?
Does it mean the signal is just one channel of R or IR signal. I am confused because the switch of each LED will turn on and off per every 2ms.
3) I have to get the raw data about the R and IR intensity. What should I do?
Thank you very much.
Eric, Lin