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<p class="MsoNormal"><b><span style="font-size:14.0pt">Hi everyone,<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt">Thanks for meeting on Friday night at the DCC to discuss these questions and Bill’s documents. Here are the notes I took at the meeting.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt">73 de Nathaniel W2NAF<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
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<p class="MsoNormal"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt">HAMSCI project discussion Topics for DCC 2019</span></b><span style="font-size:14.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:14.0pt"> Rev 9-16-2019<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
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<p class="MsoListParagraph" style="margin-left:61.5pt;text-indent:-43.5pt;mso-list:l1 level1 lfo2">
<![if !supportLists]><b><span style="font-size:14.0pt"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span></b><![endif]><b><span style="font-size:14.0pt">Need cost estimates for the Clock, DE, RF, and Magnetometer modules.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt">During the meeting, we estimated the
<i>sales prices</i> for the following items: <o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:.25in;mso-list:l3 level1 lfo3"><span style="font-size:14.0pt">Data Engine - $250
<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l3 level1 lfo3"><span style="font-size:14.0pt">RF Board - $150<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l3 level1 lfo3"><span style="font-size:14.0pt">Magnetometer (including cable) - $125<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l3 level1 lfo3"><span style="font-size:14.0pt">Clock board (includes synthesizer)- $75-200<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">The following would be required for station operation, but not actively being developed by TAPR:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:.25in;mso-list:l2 level1 lfo4"><span style="font-size:14.0pt">Antennas<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l2 level1 lfo4"><span style="font-size:14.0pt">Feed Line<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l2 level1 lfo4"><span style="font-size:14.0pt">Power<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:.25in;mso-list:l2 level1 lfo4"><span style="font-size:14.0pt">Single Board Computer<o:p></o:p></span></li></ul>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><br>
2. What is the schedule for the modules, testing, prototypes?<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">While an exact schedule needs to be defined, we have the following goals established:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">Data Engine (Prototype – HamCation February 7-9, 2020)<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">2-chan RF receiver (Hamvention May 15-17, 2020)<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">GPS Clock – (Proof of concept HamSCI Workshop March 20-21, 2020<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">Magnetometer – (Integrated Prototype – HamCation February 7-9, 2020)<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">SBC, Power supply, etc. – Not determined.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo5"><span style="font-size:14.0pt">Hardware Complete System Prototype – June 2020<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:14.0pt">Note: I am planning on hiring a postdoc for 2 years to work on ionospheric algorithms for this system. I’d like them to start working May-June 2020, just about the time the first complete hardware prototypes
should be available.<o:p></o:p></span></i></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><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?<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Scotty has picked out a hardware chip to be that has a guaranteed unique 72 bit long ID that cannot be changed. The chip is very inexpensive and can be attached to every board. Additional descriptive information
can be programmed and appended to the unique id.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><br>
4. Do we need to create any videos describing what the project is, what the objectives are, status, or other?<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">For the momement, the videos that are being generated at DCC, Hamvention, and HamSCI workshop are serving this purpose. As we develop hardware and the system, additional tutorial and promotional videos will
be welcome.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><br>
<b>5. Only a little discussion so far on power supplies. General agreement on +11 to +15 VDC source. We need to come up with the general supply<o:p></o:p></b></span></p>
<div>
<p class="MsoNormal"><b><span style="font-size:14.0pt">distribution scheme before board design and layout commences.<br>
a. Have the DE or Interconnect board condition all power.<br>
b. Have each module condition any critical power it needs.<br>
i. Voltages feeding critical analog circuitry (Clock Module, RF Module).<br>
c. Have an external power conditioning module.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">We did not discuss this at DCC, as there was significant power supply discussion already on the listserv.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><br>
<b>6. HAMSCI 2020<br>
a. Any more information on the location?<br>
b. Should we plan a demo of TangerineSDR or the completed parts?</b><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">HamSCI 2020 will be at the University of Scranton March 20-21, 2020. A demonstration of completed parts is most welcome.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><br>
<b>7. Receive Antennas. Mike Pappas has acquired a calibrated filed strength meter, we discussed seeing if DX Engineering would let us measure a<o:p></o:p></b></span></p>
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<p class="MsoNormal"><b><span style="font-size:14.0pt">production lot of antennas (10?) to determine the field strength sensitivity and variance.</span></b><span style="font-size:14.0pt"><br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">More discussion on antennas is needed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt">8. Do we need a test plan for the system?<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Yes, a plan needs to be developed.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><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></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">We will start by defining an operational mode that mirrors what the CWRU Low-Cost PSWS will be doing. This will likely be fairly low bandwidth and well within the capabilities of the system. The exact amount
and format of the compression will depend on the specific data mode that is being developed.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><br>
<b>10. Discuss and review the Local Host Functional Specification.<br>
11. Discuss and review the Central Control Functional Specification. <o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Comments on these specifications were collected by Bill AB4EJ. He will be incorporating these comments into the documents over the next week and send the revised documents back to the listserv for additional
review.<o:p></o:p></span></p>
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<p><span style="font-size:14.0pt"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
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