Gary get a mast mounted antenna amplifier on the antenna. You need a U/V antenna. The CM-7777 amp isn;t as good as the new ones. Ideally the power injector should go on the coax leading to the antenna. It could be 65' away. The NF or Noise figure specs are better to look at. The lower the number, the better. 5 is bad.
I don;t know what kind of cable your using,nor do I know the distances. Your noise margin looks very good for the general zio code with TV fool. The gain of the antenna needs to be known etc before you can guess.
Use RG-6 quad shield with the right connectors.
There really isn;t such a thing as a power splitter. When one talks about power, they usually mean DC blocking. An 8-way splitter will give you 8 ports with the same attenuation. Sometimes you need to add attenuators to reduce the signal.
Too much signal will actually cause loss of picture.
RG-6 and RG-6 Quad shield are two different cables. Home Depot sells compression connectors. This is a compression connector:
http://www.homedepot.com/p/Klein-To...ector-for-RG6-6Q-10-Pack-VDV812-606/203578626
This
**broken link removed** says you loose about 13 db of signal when you add this splitter. Alway terminate with 75 ohm terminator unued ports.
here
http://www.w4rp.com/ref/coax.html you can see the BIG difference in losses per 100' of coax 6 vs 20 db or so at 900 mHz.
So in a simple case, you want to take the signal level
**broken link removed** finds and add the gain of the antenna and subtract the losses to end up with a 0-10 db signal at each location. Tilt compensator are used to try to invert the loss with frequency when using a long feed length. As you can see, the loss is dependent on frequency used as well.
Don;t forget the drip loops.
These things (taps)
**broken link removed** are wierd. They remove 6 db of signal from in to out and downstream gets upset when you remove cables. These are not splitters. The end of the line would also need a TV or a terminator.