The range from 30 MHz to 300 MHz, within which are found U.S. television channels 2 through 13. VHF television channels seem about as filled as current technology allows, which is why much ATV debate centres on channel allocations in UHF and/or SHF. Some ATV proponents, however, feel that a robust, low-level digital augmentation channel might be squeezed into adjacent VHF channels without interference, perhaps even two augmentation channels per adjacent channel. If that can be done, every U.S. television broadcaster would be able to have an ATV augmentation channel.