Editing Set-top box (section)

===UHF converter===
Before the [[All-Channel Receiver Act]] of 1962 required US [[television set|television receiver]]s to be able to tune the entire [[very high frequency|VHF]] and [[ultra high frequency|UHF]] range (which in [[North America]] was [[NTSC#NTSC-M|NTSC-M]] channels [[Pan-American television frequencies|2 through 83]] on 54 to 890{{spaces}}[[hertz|MHz]]), a set-top box known as a UHF converter would be installed at the receiver to shift a portion of the UHF-TV spectrum onto low-VHF channels for viewing. As some 1960s-era 12-channel TV sets remained in use for many years, and [[Canada]] and [[Mexico]] were slower than the US to require UHF tuners to be factory-installed in new TVs, a market for these converters continued to exist for much of the 1970s.