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<p class="MsoNormal"><span lang="EN-US">80m ham radio band used for wideband video/data<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Trials in the UK have used 3.613 MHz for 24 kHz bandwidth high-speed data and video transmissions
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In recent years there has been increasing military interest in high-speed data on HF.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">By using modern modulation techniques a SSB channel can support a raw data rate of 12800 bps and wider transmissions can support proportionally faster data rates. Trials have shown that color video at 15 frames per second
can be streamed on HF in a bandwidth of just 18 kHz. That is the type of bandwidth that may be accommodated in the amateur radio 29 MHz band.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the UK HF trials have taken place between Blandford and Portsmouth (Portsdown), and Arbroath and Portsmouth. They used frequencies, licensed by Ofcom, of 3.613, 6.390, 7.975 and 13.047 MHz with bandwidths up to 24
kHz and power up to 400 watts. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Information on these trials can be seen at
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">http://www.hfindustry.com/meetings_presentations/presentation_materials/2012_sept_hfia/presentations/RC_WBHF_UK_Trial_2012.pdf<o:p></o:p></span></p>
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