Three years ago I bought a Motorola Signal Booster 484095-001-00 and it still is working well.  Two months ago I needed another, but I saw this Channel Master model ant it was cheaper than the Motorola and included the splitter.  Channel Master is a brand that I learned to trust, but two months later it doesn't work anymore.  I found out by disconnecting it and putting the splitter that it replaced back in.  The signal strength was stronger with the splitter than with the amplifier.  I bought another Motorola Signal Booster 484095-001-00 and ran it through the old splitter and this works better than the Channel Master ever did.  Maybe you get what you pay for?  Maybe just bad luck?  I'll stick with Motorola for now. 

Question: What did you think of the modem signal?
Answer: it still is working well .