ROS and CHIP deemed illegal below 222 mHz for U.S. amateurs
“It appears as though neither ROS or the older CHIP digital modes are legal for use below 222 mHz by licensed U.S. amateurs.
On 23 February, 2010, an email was shared on various Web sites in which Dan Henderson of the ARRL reported that the League’s technical staff had determined that the new ROS mode did, indeed, include spread spectrum technology and, as a result, was illegal for use below 222 mHz by licensed U.S. amateurs.”
Full Article: http://forums.qrz.com/showthread.php?p=1870530#post1870530
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