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constant signal in DMT modulus for long range of datapoints

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Mark posted on Tue, May 5 2015 6:33 PM

Hello all, 

My questions regards DMT modulus channel in the QNM PF mode. In the DMT channel we get a lot of streaky lines, where the DMT modulus appears to be constant over a long range of subsequent datapoints (see link to figure below). Considering how the value of the DMT modulus is extracted from the heartbeat signal (as I understand it) it seems to be almost impossible to get a constant for such periods.

Has anybody encountered this problem before?

Regards,

Mark

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Answered (Verified) Mark replied on Sat, May 16 2015 10:47 AM
Verified by Mark

Apparently this is a calibration issue for the sync distances or DDS3 amplitude. If you find yourself with the same problem I suggest this training video from bruker https://vimeo.com/user15273673/review/119890124/ec51c428e4. The relevant part for this issue starts at min 43:30.

Mark

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