Hi. We've set up the EVM5515 and the SpO2 front end but we are getting either a flat red line or noise coming out. No heartbeat pictures like in the pdf; no SpO2 or HR readings. Below is what it looks like. The red noise occurs just after we insert our finger into the probe:
But according to the application note, we should be getting something that looks like this:
Where do I start looking? Any help would be greatly appreciated.
Thank you.
