I'm using 2 ADIS 16448 together in a tilt sensor. They are mounted on the same base and should give the same signal.
For reasons we can't explain the Y axis of one of the sensors started jumping around and acting strangely, even when stationary. It would fluctuate +- 1 milligauss for 100 ms then jump 4 milligauss and hover there with +- 1 milligauss deviation for 100 ms then drop 4 milligauss. When viewed on a signal vs time graph it looks like a PWM signal.
We can't figure out what causes this to happen.
The platform isn't vibrating because nothing is picked up in other sensors.
Could it be something like the power supply?