TBC question: macrovision removal?

[miniman82]

K, so I did as others have suggested and incorporated a professional rackmounted TBC (time base corrector) to my home broadcasting rig. Trouble is I still have macrovision in my vintage sets, and I thought a TBC was supposed to cure that. It's a FOR A FA-310 model, and it seem to be in working order. All the pots behind the front panel (like chroma phase and background) work like they should, even freeze frame works like it's supposed to. Any reason a high end TBC wouldn't remove macrovision? Have I blown $100 for nothing here?

More on the rest of the rig later, that's a separate post.