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Hi

I'm kinda stumped with the weird altitude readings that I've been getting, it has something to do with the xbee pro 900 I'm using for telemetry. I've uploaded a graph to show you what the output from the barometer is and what happens when the xbee is connected alt%20data.jpg.

When I touch the the aerial its returns to semi normal operation, moving or touching the wires from the imu to the xbee also makes it a little better. I tried twisting the tx and rx wires and even wrapping them in aluminium foil all with varying levels of success but noting that would produce an output that was satisfactory

I guess it could be some sort of RF interference inducting on the wires affecting the barometer or something along those lines. Maybe a ferrite ring could help, I might try shorting the wires and see what happens. I'm no electronics expert so I'm 100% sure what's happening and why its only effecting the barometer. I haven't seen anyone else with this problem.

Any help or suggestions would be appreciated.

Thanks

Jeremy

alt data.jpg