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<div><font size="2"><b>Hi guys,</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>A Digital Repeater on HF, digital solves two big repeater problems:</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>1) Is the signal valid? sync</b></font></div>
<div><font size="2"><b>2) Does the signal want to be repeated? in the data</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>Our ionosphere does a marvelous job of bouncing signals back to earth but</b></font></div>
<div><font size="2"><b>500Km away or more. and the coverage area of a station would be a doughnut</b></font></div>
<div><font size="2"><b>perhaps 2000Km diameter and 500Km wide but two stations 100km apart</b></font></div>
<div><font size="2"><b>can't communicate. What about a repeater? Or, several repeaters spaced 500Km</b></font></div>
<div><font size="2"><b>apart?</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>Well, our NSW country ambulances are now fitted with Codan HF digital radios</b></font></div>
<div><font size="2"><b>and they intend to use mode TWELP 1200 (c), they are doing just that.</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>Any thoughts?</b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>See: Freetel.org our Open Source Ham Radio version.
<br /></b></font></div>
<div><font size="2"><b>
<br /></b></font></div>
<div><font size="2"><b>Alan VK2ZIW
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Alan Beard
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OpenWebMail 2.53
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