When dong a biofeedback scan of any type, a ramp should not be used. Typically you are spending under 5 seconds on each frequency, and if you specify a ramp to take over 5 seconds, which starts at 0 volts, no voltage would ever get applied -- the voltage resetting to 0 every time the frequency changed. This also is an issue with any type of sweep.
It is possible John has coded the scans to ignore the ramp setting. I do not recall.
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