History of Diagnosing Hardware

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Changed: 11c11,16

If rawcount counts up and down, but the DRO is wrong, then you likely have a scaling problem

If rawcount counts up and down, but the DRO is wrong, then you likely have a scaling problem.

1.1. Voltage Checks

The A pair and the B pair should behave identically , that is
all pins should have roughly TTL level swings
(with a 0-.4V low and a 2.4 to 5V high)depending on shaft position
if the A and B pairs behave differently I would check your wiring.

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	Revision 2 . . April 9, 2012 11:46 pm by Jthornton
	Revision 1 . . April 9, 2012 1:28 pm by Jthornton