Since I have decided to banish all bad-magic phase twisting devices and only use good-magic, I figure it's time to really learn to tune these Huanyang VFD's. I have two identical ones, HY02D223B, purchased nearly a year apart. I have Googled extensively, but found no helpful information on these units. I have found extensive help on what is apparently an older parameter set. And I've found a few threads with people having massive problems with these newer units, likely because they are trying to set them up via utube and forum experts using the old parameter set rather than reading the manual. Many of the basic parameters are pretty self-explanatory. The manual, at least this model/version, isn't as bad as some make it to be. I'm going to start with two questions. What would be a likely wording for the carrier signal that is so often mentioned? I don't see anything that I can relate to a carrier. PN12 Motor rating frequency. Would this be 60hz for old mill and lathe motors? PN19-26 Multi-segment frequency. What is this? Okay, okay, that was three questions.