Radioshack = Crapshack

1

So I go into Radioshack today trying to find a splitter so I can watch TV and surf at the same time. The guy showed me one and me being an idiot, took it.

I ate lunch, ripped open the bag and threw everything else away. I come home, and the thing doesn’t work.

Here’s what I got:
Link

Here’s what I think I should’ve got: Link

I’ve ruled down to possible problems:

  1. I’m a complete careless idiot.
  2. The signal to the modem is already weak and I have to use an amplifier.
  3. I’m not plugging the right one into the VHF or UHF slot.

Any help is appreciated.
:m: