For example, the Swiss Federal Office of Communications,[1] the Broadcast engineer's reference book[2] and Ericsson India Ltd[3] all define the range of Band IV from 470 to 582 MHz.
[5] Band IV is primarily used for analogue and digital (DVB-T, ATSC and ISDB) television broadcasting, as well as services intended for mobile devices such as DVB-H.
In the UK, Band IV allocations are 8 MHz wide, traditionally consisting of 14 channels from UHF 21 to 34 inclusive.
However, in the mid-1990s the squeezing of analogue Channel 5 broadcasts into the existing national terrestrial TV transmitter network effectively closed a gap between bands IV and V, which was previously reserved for radar applications and home consumer devices.
This stretched the practical definition of Band IV in the UK to cover 18 channels from UHF 21 to 38 inclusive.