installed over 150' off a swm system at my house (swm frequency runs 350mghz to 1150mghz and does not use voltage to switch polarities it only needs 21 volts) I put the power inserter in the garage ran the output to a splitter have had no problems in a year and a half.
This is CABL.com posting #327673. Tiny Link: cabl.co/mbxpd