View Single Post
Old 17-Mar-2013, 1:42 AM   #14
GroundUrMast
Moderator
 
GroundUrMast's Avatar
 
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
When you look at your TV Fool report, the noise margin column is helpful when estimating the amount of cable and splitter loss you can tolerate without needing amplification.

Plan for 6 dB of loss for each 100' of RG-6 cable. A 2-way splitter will have about 4 dB loss.

So, your cable may introduce 10 to 12 dB loss... for a total of 16 dB loss after accounting for the splitter. The modest gain of the antenna offsets a few dB of that loss but ignoring the antenna gain you would still have a net NM of 20 dB or better at TV #2 for all signal in the green section of your report. (Simply subtract the cable and splitter losses from the report NM prediction.) That tells me you'll do just fine with no amplification.

If you're stuck with the amplifier, feel free to try it... I anticipate it will overload, resulting in less reliable reception.

Last edited by GroundUrMast; 17-Mar-2013 at 3:24 AM.
GroundUrMast is offline   Reply With Quote