It is their "higher end" unit that they target to industrial automation uses.
Does anyone know what input sync polarity it is supposed to accept? The manual makes no mention of input sync polarity.
This post here says the cheaper 8200/8220 units don't accept positive sync, only negative -- but obviously I'm asking about this higher end 8219 unit.
I asked Gonbes but got the usual Chinese manufacturer reply of "we only answer questions if you bought directly from us, please send us a copy of your invoice"