Posted: Mon Jun 14, 2010 12:04 pm Post subject: X3-SD, snap, unexpected ramp at start of each collection
I am driving channel 0 of X3-SD single ended with a sinusoid. The beginning of each collection displays a ramp at the start of every collection, which results in a huge dc offset. This ramp can last 100 ms or more and happens on every collection. Is this an expected part of the collection process?
Joined: 07 Mar 2006 Posts: 2250 Location: So. Cal. USA
Posted: Mon Jun 14, 2010 2:05 pm Post subject:
As streaming commences, the X3-SD A/Ds and amps are powered-up. The ramping up is a manifestation of this. So, this is normal.
This could be eliminated by delaying the trigger after stream start to allow the A/Ds to stabilize before data acquisition commences. To achieve this, alter the HandleTimer method in the Snap example or apply an external trigger which fires after streaming starts.
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