History
The band became officially available around 1993 only in ITU region 2 (North and South America). It is popular with microbroadcasters for having slightly better propagation characteristics than the standard AM band.
Though supported on most (but not all) modern AM radio receivers sold in the Americas, this band is usually unavailable to older radio receivers except for those with substantial overcoverage. On such radios, the 1600-1700 segment was labeled "Police", since it was the original police radio band. In the U.S., coverage on newer radios is mandated by the Federal Communications Commission (FCC), invoking the All-Channel Receiver Act.
Read more about this topic: AM Expanded Band
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