Altitude problem

Greetings all thank you for this great community.

I am having problems with my altitude readings.  I have been trying to dial in my altitude hold PIDs but i get jerky motions.  I checked the readings on the mission planner and found they were jumping up and down as much half a meter (I am assuming altitude is registered in meters).  I switched APM1s and have the same problem. I upgraded code and mission planner today.  I have the APM1s on the worktable and out of the quad, on one all I have is the xbee hooked up to it.  Can a faulty xbee cable do this?

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  • I have no idea if the xbee can cause it, but i have read that 2 meter resolution is about the best the barometer will give,

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