Periodic noise in Biosemi ActiveTwo system
Posted: Sat Apr 18, 2015 3:04 pm
Hi,
We are using the Biosemi ActiveTwo 128 channel system. When doing the saltwater (one-bucket) test, we notice that there is periodic noise at 2Hz intervals, starting at 6Hz, 8Hz, 10Hz, 14Hz, 16Hz etc (for some reason 12Hz isn't as prominent).
We have tried this test in two rooms in two different wings of our building, but the results are the same. So my guess is this is something intrinsic to the hardware. Could you advice on what might be source of this noise and how we might go about correcting it? Any pointers would be appreciated. Thanks.
We are using the Biosemi ActiveTwo 128 channel system. When doing the saltwater (one-bucket) test, we notice that there is periodic noise at 2Hz intervals, starting at 6Hz, 8Hz, 10Hz, 14Hz, 16Hz etc (for some reason 12Hz isn't as prominent).
We have tried this test in two rooms in two different wings of our building, but the results are the same. So my guess is this is something intrinsic to the hardware. Could you advice on what might be source of this noise and how we might go about correcting it? Any pointers would be appreciated. Thanks.