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<h1><font size="4">ROS on HF outside scope of US Amateur Radio license</font></h1>
<p><strong>An email from the ARRL Regulatory Information Manager indicates the use of the new data mode ROS on HF, 6m and 2m is not allowed by the US Amateur Radio license</strong>.</p>
<div>Although ROS only occupies a bandwidth of about 2.2 kHz it is technically a Spread Spectrum mode and the FCC only permits Spread Spectrum on frequencies above 222 MHz.</div>
<div><br>The mode is used on HF by Amateurs in countries around the world without any problems, the USA seems to be the only country where it is an issue.</div>
<p>In 2005 the ARRL tried unsuccessfully to get the FCC to adopt band planning by bandwidth instead of the current restrictive band planning by mode. It is to be hoped that the situation with ROS will clearly highlight the inadequacy of the current US license regulations and will lead to a renewed move to change them.</p>
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<p><strong>The email from the ARRL was posted on the Digital Radio Yahoo group and reads:</strong></p>
<p>From: Henderson, Dan N1ND<br>Subject: RE: Spread Spectrum<br>Date: Tuesday, February 23, 2010, 7:13 AM</p>
<p>Hi</p>
<p>I ran this by our technical experts. They concur that ROS is a spread spectrum mode and as such is not allowed by the FCC on bands below 222 MHz. Remember that approved emissions vary from IARU Region at times as well as between countries. So while the IARU Band Plan for Region 2 would allow it, <strong><font size="4">SS is not permitted on the HF bands by the FCC</font></strong>/</p>
<p>Thanks and 73</p>
<p>Dan Henderson, N1ND</p>
<p>Regulatory Information Manager<br>ARRL, the national association for Amateur Radio™</p><strong>
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<h2><font size="4"><strong>ROS</strong> is a brand-new Amateur Radio digital spread spectrum mode.</font></h2>
<p>The first contact with ROS took place on February 18, 2010, at 20:56 UTC from Vitoria in Spain to the University of Twente in the Netherlands covering a distance of 1265 Km on 7.065 MHz. The first Ham Radio Operator to receive was <strong>EA2LE</strong>.</p>
<p>The <strong>HF frequencies currently used for ROS are USB 3.600, 7.053, 14.101, 28.300</strong> <strong>MHz</strong></p>
<p>To use ROS <strong>you just need your HF radio, a PC and a basic PC sound card interface</strong>, see link below.</p>
<p>The software for ROS is free and can be found at <a href="http://rosmodem.wordpress.com/" target="_blank"><font color="#003e54">http://rosmodem.wordpress.com/</font></a> along with the Introduction to ROS Spread Spectrum and a user guide</p>
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<div>Amateur Radio data mode ROS proving popular<br><a href="http://www.southgatearc.org/news/february2010/ros_proving_popular.htm" target="_blank">http://www.southgatearc.org/news/february2010/ros_proving_popular.htm</a></div>
<p>2005 ARRL Petition For Rule Making<br><a href="http://www.arrl.org/announce/regulatory/bandwidth/Bandwidth-Minute-64-Petition-FINAL.pdf" target="_blank">http://www.arrl.org/announce/regulatory/bandwidth/Bandwidth-Minute-64-Petition-FINAL.pdf</a></p>
<p>Digital Radio Yahoo Group<br><a href="http://groups.yahoo.com/group/digitalradio/" target="_blank">http://groups.yahoo.com/group/digitalradio/</a></p>