<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1269654869;
mso-list-type:hybrid;
mso-list-template-ids:-763753200 2126283692 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Calibri",sans-serif;
mso-fareast-font-family:Calibri;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">Something to consider on this, for convenience of the user: the Odroid N2, which we are thinking is the likely SBC in the Tangerine, runs on 12v also (not 5v).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">73- Bill, AB4EJ<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> TangerineSDR <tangerinesdr-bounces@lists.tapr.org>
<b>On Behalf Of </b>Tom McDermott via TangerineSDR<br>
<b>Sent:</b> Friday, September 13, 2019 8:29 AM<br>
<b>To:</b> Phil Erickson <phil.erickson@gmail.com><br>
<b>Cc:</b> Tom McDermott <tom.n5eg@gmail.com>; TAPR TangerineSDR Modular Software Defined Radio <tangerinesdr@lists.tapr.org><br>
<b>Subject:</b> Re: [TangerineSDR] DCC discussion list<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">HI Phil - We certainly will need requirements on power & distribution characteristics.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">However I think we first may need a plan.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Question 1: do we operate off:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option A: 120VAC input (North America)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option B: 120-240VAC input (Worldwide)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option C: + 12VDC input? [ +12V means in my view +10.5 to +13.8 VDC, allowing a battery to be the power input. ]<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">In my view Option C is the easiest for project engineering, but requires the user to generate +12V, battery charge, etc.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Given the possible worldwide AC variables, battery type and size variables, etc., it avoids many issues.<o:p></o:p></p>
</div>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">If we were to choose Option C then, at the system level then:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Question 2 how do we create needed voltages: <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option 1. Data Engine regulates & distributes all the system voltages from a single +12VDC (11-13.8V) input.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option 2: Separate DC supply derives all the needed voltages from +12VDC (11-13.8V) input.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Option 3: Each module derives it's own voltages from a +12VDC (11-13.8V) input.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">-- Tom, N5EG<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Thu, Sep 12, 2019 at 7:00 PM Phil Erickson <<a href="mailto:phil.erickson@gmail.com">phil.erickson@gmail.com</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class="MsoNormal">Hi Tom,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"> It is probably good for item 5 to think about whether cleanliness specs for the power supply are required. As you know, hash on the DC lines could be a major RFI problem. (Batteries would tend not to have that issue, hence their mention
earlier.)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">73<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Phil<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Thu, Sep 12, 2019 at 9:58 PM Tom McDermott via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal">I've combed the meeting notes and some other thoughts and put together a frist draft of possible DCC discussion topics for HAMSCI / TangerineSDR.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Please review and send me additions, deletions, changes, etc. by Monday the 16th and I'll iterate once before the conference.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">-- Tom, N5EG<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><b><span style="font-size:14.0pt">HAMSCI project discussion Topics for DCC 2019</span></b><o:p></o:p></p>
</div>
<p>1. Need cost estimates for the Clock, DE, RF, and Magnetometer modules.<br>
2. What is the schedule for the modules, testing, prototypes?<br>
a. Data Engine<br>
b. 2-chan RF receiver<br>
c. GPS Clock<br>
d. Magnetometer<br>
e. Other ? SBC, Power supply, etc.<br>
3. Each module will have a unique manufacturer serial number based on some PROMs that have this capability. Any issues with the number or format?<br>
4. Do we need to create any videos describing what the project is, what the objectives are, status, or other?<br>
5. No discussion so far on power supplies, other than a request for +12V battery power capable. Do we need a plan?<br>
6. HAMSCI 2020<br>
a. Any more information on the location?<br>
b. Should we plan a demo of TangerineSDR or the completed parts?<br>
7. Receive Antennas. Mike Pappas has acquired a calibrated filed strength meter, we discussed seeing if DX Engineering would let us measure a production lot of antennas (10?) to determine the field strength sensitivity and variance.<br>
8. Do we need a test plan for the system?<br>
9. Upload data compression appears feasible (3:1 ?). Do we need any study or proposals of how much data we are asking folks to upload? Or is this better to determine experimentally?<o:p></o:p></p>
<p><o:p> </o:p></p>
<p><o:p> </o:p></p>
</div>
<p class="MsoNormal">-- <br>
TangerineSDR mailing list<br>
<a href="mailto:TangerineSDR@lists.tapr.org" target="_blank">TangerineSDR@lists.tapr.org</a><br>
<a href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org" target="_blank">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><o:p></o:p></p>
</blockquote>
</div>
<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">-- <o:p></o:p></p>
<div>
<p class="MsoNormal">----<br>
Phil Erickson<br>
<a href="mailto:phil.erickson@gmail.com" target="_blank">phil.erickson@gmail.com</a><o:p></o:p></p>
</div>
</blockquote>
</div>
</div>
</body>
</html>