That APC unit doesn't say anything about interference protection.
This Triplite unit does:
https://smile.amazon.com/Tripp-Lite-...ne+conditioner
data sheet:
https://assets.tripplite.com/product-pdfs/en/LS606M.pdf
However, no specs on the actual dB of suppression, so I would buy it from a place like Amazon with a lenient return policy, in case it doesn't fix your problem.