Shovelhead, Are you sweeping in OK? I was just going to post that my son is sweeping in OK and seeing a suck-out at around 630MHz. That stuff was made when 330 was the top of the band pass and they "threw" the problem "way up there" where we would never use. There is absolutely nothing you can do about it as it is a product of the way the cable was made. Only course is to replace cable
This is CABL.com posting #183859. Tiny Link: cabl.co/mVZD