The Channel Master JoinTenna combiners are designed to combine two separate antennas onto one coaxial cable. These are used when one or more channels are in a totally different direction than the rest of the TV stations you are trying watch, but you prefer to not use a rotator to rotate the antenna to point at those TV stations. The JoinTenna CM0578 is designed to allow all channels except channel 8 to pass through one port, and to allow only channel 8 to pass through the second port.
• Channel 8 Input Insertion Loss: 2 dB
• Broadband Input Insertion Loss: 3 dB
• Bandstop filter isolation: 12.5 dB