AVS Special Member
Join Date: Jan 2000
Location: Salt Lake City, UT, USA
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Cable TV uses frequencies from about 5 MHz to as high as 1000 MHz (below 50 is used for the return feed from your box or internet). The band is pretty much "full", with every channel in use.
Over-the-Air uses three bands of channels, from 54 to 88 (plus, 88-108 for FM radio), 174 to 216 MHz, and 470 to around 700 MHz (UHF). It's possible on many satellite systems (but, not all) to "Diplex" OTA or Cable (below about 900 MHz), with the satellite dish's L-Band signals, which start at about 950 MHz, and go up to 1450, or even 2150 MHz.
But, that's only because the bands don't overlap between the two devices.
Some satellite systems don't even allow for that, since they use everything about the VHF channels for an additional satellite band.
Ken English, Sr. Engineer, KSL-TV.
"The postings on this site are my own and don't necessarily represent the Company positions, strategies or opinions."