Try to translate this:
Generally backlash is for compensate mechanical movements due to the against gravity travel. So normally OUT direction is focuser extraction (and focus direction used by default in Voyager) and backlash is in IN. You can measure it translate the thead above but again … Backlash is not a unique value, is an inferior limit , you can choose all the value over this limit and work fine.
Voyager have an internal AI for focus and can manage some adjustment on your system during autofocus. Backlash also change depending on position of the sky, AI can manage this.
For value you can start using the number of steps that change HFD of a star by 1 point.
All the best
Leo