If you are receiving the weak CBS, suggest you install a pre-amp at antenna, raises the signal for the TV input tuner or digital box. If you leave the 5 way splitter in, you must install the power inserter after the splitter on the antenna side. Worth a try
I have used and very happy with one from Antra: (
http://www.partsforhdtv.com) which did not overload pointing straight through the CN Tower to Buffalo
HDTV Antenna Low Noise High Gain Pre-Amplifier Model: AT-PAU18
CAD $32.09
SPECIFICATIONS
Frequency Range UHF CH14-69/470-806MHz
Gain 28dB
Noise Figure 2.0dB
Power Supply 12VDC/100mA