<div dir="ltr">Dennis,<br><br>I don't think you know me at all, nor my reading habits or educational background, so your assertion is flawed at best. Actually, I have read and studied the specification at <a href="http://www.arrl.org/FandES/field/regulations/techchar/D-STAR.pdf">http://www.arrl.org/FandES/field/regulations/techchar/D-STAR.pdf</a> a few times. I don't read Kanji so, I haven't been able to study the original and more complete specification. However, a reading of the aforementioned English version will demonstrate that neither the term DV or DD is defined, speaking only of "Voice Communication" and "Data Communication" (and "Backbone Communication") the "Data Communication" specifically discusses the 128k, Ethernet style, communications and specifically includes the short data messages (slow data) in the "Voice Communication" section. <br>
<br>If you look back over the last few years, DV and DD, were terms that started appearing in Icom marketing communications some time after the specification was written and initial products produced. Icom literature, that I have seen, equates the "Data Communications" to DD, and "Voice Communication" (including data messaging) to DV.<br>
<br>You are free to keep your incorrect opinion, and use your terminology, but the general community will continue to use "DD" and "DV" as described.<br><br>And what the heck is SATX? (Using a local acronym doesn't communicate anything to the general community.)<br>
<br><div class="gmail_quote">On Mon, Sep 29, 2008 at 12:32 AM, Dennis Rogers <span dir="ltr"><<a href="mailto:n5vrp.satx@gmail.com" target="_blank">n5vrp.satx@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div dir="ltr">You have not read much of the Dstar spec and have a background in EE/CS retired.<br>
It is already digital going into the radio and is NOT any part of the DV other than in the same frame with it.<br>It does not matter about the Ethernet as without a radio-to-radio the DD frame within the DV Frame is digital data (raw).<br>
<br>It is not referred to as DV data it is <b>D</b>igital <b>D</b>ata(DD) within <b>D</b>igital <b>V</b>oice(DV). Two different types of FRAMES.<br></div></blockquote></div><br clear="all"><br>-- <br>John D. Hays<br>Phone: 206-801-0820<br>
Fax: 866-309-6077<br>Email: <a href="mailto:john@hays.org" target="_blank">john@hays.org</a><br>VOIP/SIP: <a href="mailto:john@hays.org" target="_blank">john@hays.org</a><br>
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