Final answer:
60 meter band is the amateur band restricted to communication on specific channels, rather than frequency ranges. Unlike other bands, this is channelized, meaning that transmission can only occur on predetermined channels. This characteristic makes this amateur band very distinct compared to others.
Step-by-step explanation:
The amateur band that is restricted to communication on specific channels, rather than frequency ranges is D. 60 meters. While other amateur bands like 11 meters, 12 meters, and 30 meters allow users to communicate over a range of frequencies, the 60 meter band is more restrictive. This band is channelized, meaning that users can only transmit on specific, predetermined channels. This is due to the fact that the International Telecommunications Union (ITU) has allocated this band on a channelized basis. Channels are specific frequency points within a band that are used for specific communications. This makes the 60 meter band unique in its usage compared to other amateur bands.
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