superband (upper special channels)
Terrestrial television uses various frequency bands in the VHF range and in the UHF range for transmission. The television frequency bands in the VHF range are designated Band I and Band III.
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The frequency range of Band III ends at 224 MHz. Above this is a frequency range not used for terrestrial television up to the hyperband, which begins at 300 MHz. This frequency band between 231.25 MHz and 294.25 MHz is called the upper special channel band (OSB) and is used in cable distribution networks for feeding television channels. The upper special channel band comprises the ten analog television channels S11 to S20, each with a bandwidth of 7 MHz. In the frequency range above the upper special channel range is the extended special channel range( ESB), also called the hyperband.