[Mike Copioli]

Both Al and Alan Andersons suggestions are good. The most likely problem is an intermittent PWM signal either at the software or hardware level.

Another possibility is an excessive periodic loop time. The time out on the Talon is 100 ms. That means if the Talon does not detect a rising OR falling edge after 100 mS, the output will be disabled.

If you have access to an oscilloscope you may us it to verify your loop time by toggling a digital I/O every periodic loop. Make sure you call this in the same area you set the throttle value.

As Alan stated the jump and jitter can be caused by an interrupted PWM signal.

Check for poor PWM cabling and DSC performance issues.