Anntenna Question

Hi,

I recently had electricians put a Radio Shack FM antenna on my roof. It's wired with RG-6U cable through a couple of patch panels down to where my receiver is located. Probably about 100' of wire in all.

It doesn't help reception -- in fact, I've gone back to the little wire dipole anenna that comes with the receiver because it sounds better. I put a little Radio Schack antenna amplifier in the mix about 10' from the antenna, and that doesn't help either.

The problem is that I don't know of any way to check whether there's actually a signal on this wire! I have access to bench-quality DVM, but that's about it. Would I require an oscilliscope to check?

I'm also not sure this is the right type of wire, or that I'm hooking it to the receiver correctly.

Any advice appreciated. Thank you!

- Eric