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<H1>New ROS modes for 500 kHz band</H1>
<P>Two new modes designed for use on the 500 kHz (600m) band have been added to
the free <STRONG>ROS</STRONG> Amateur Radio digital data modes software.</P>
<P>In the latest version when you click on "Menu Mode” there are two new ROS MF
modes available called: ROS7 MF and ROS1 MF.</P>
<P>The two modes each occupy a bandwidth of just 100 Hz, ROS7 is designed for a
"quick" contact whereas ROS1 is a low speed mode for very low power (QRP)
working..</P>
<P>Characteristics:</P>
<P>ROS7 MF: 128 characters/minute BW: 100 Hz S/N (2500Hz): -26.7dB</P>
<P>ROS1 MF: 21 characters/minute BW: 100 Hz S/N: (2500Hz): -35.7dB</P>
<P>Download the latest version of ROS from<BR><A
href="http://rosmodem.wordpress.com/"
target=_blank>http://rosmodem.wordpress.com/</A></P>
<P>To use ROS you just need your radio, a PC and a sound card interface.</P>
<P>Information on sound card Interfacing can be found at<BR><A
href="http://www.southgatearc.org/articles/g0ftd/data_dummy_interface.htm"
target=_blank>http://www.southgatearc.org/articles/g0ftd/<BR>data_dummy_interface.htm</A><BR>and<BR><A
href="http://www.southgatearc.org/news/september2007/psk31_soundcard_interface.htm"
target=_blank>http://www.southgatearc.org/news/september2007/<BR>psk31_soundcard_interface.htm</A></P>
<P>First ROS contact on 500 kHz<BR><A
href="http://www.southgatearc.org/news/may2010/first_ros_500khz_contact.htm"
target=_blank>http://www.southgatearc.org/news/may2010/<BR>first_ros_500khz_contact.htm</A>
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