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<font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt">Dear SLS-SLP,<br>
<br>
Below please consider the following Change Request to the Prox-1 Physical Layer book (as part of the 5-year review cycle) from Enrico Vassallo (RF&MOD WG Chairman) to the policy associated with the SET PL EXTENSION RF&MOD parameters.<br>
<br>
Your comments are welcome.<br>
<br>
Best regards,<br>
<br>
Greg<br>
------ Forwarded Message<br>
<b>From: </b>"<a href="Enrico.Vassallo@esa.int">Enrico.Vassallo@esa.int</a>" <<a href="Enrico.Vassallo@esa.int">Enrico.Vassallo@esa.int</a>><br>
<b>Date: </b>Tue, 1 Mar 2011 00:12:25 -0800<br>
<b>To: </b>gkazz <<a href="greg.j.kazz@jpl.nasa.gov">greg.j.kazz@jpl.nasa.gov</a>><br>
<b>Cc: </b>"<a href="Gian.Paolo.Calzolari@esa.int">Gian.Paolo.Calzolari@esa.int</a>" <<a href="Gian.Paolo.Calzolari@esa.int">Gian.Paolo.Calzolari@esa.int</a>>, "<a href="marjorie@delandelong.com">marjorie@delandelong.com</a>" <<a href="marjorie@delandelong.com">marjorie@delandelong.com</a>><br>
<b>Subject: </b>Next CCSDS SLS-SLP Telecon on Prox-1 Data Link Layer book review - some RFM comments<br>
<br>
<br>
Dear Greg, <br>
<br>
I have some problems with Annex A that contains the format of the message and shows all possiblef options although not all of them are standardized. <br>
<br>
Gian Paolo and Marjorie mentioned that a solution for the codes was agreed in the past: <br>
<br>
>>>>>> <br>
A.1.8.3 for example reports about two types of RS codes, but it states "Neither of these R-S Codes is specified by CCSDS in other Recommendations and therefore they are not required for cross-support" (actually this text contains some improvements). <br>
>>>>>> <br>
<br>
The same approach should be applied to modulations. The bit selection can be there, but it should be stated if the modulations are really part of the standard. <br>
<br>
<br>
My specific problem is that the current Proximity-1 physical layer specifies only one data format/modulation scheme: <br>
<br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">3.2.6.1 The PCM data shall be Bi-Phase-L encoded and modulated directly onto the carrier.</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
Therefore, the following statements in red should be added at the end of sections A1.8.7 and A1.8.8: <br>
<br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">A1.8.7 <b>Data Modulation</b></span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">Bits 5-6 of the </span></font></font><font face="Times New Roman"><span style="font-size:11pt"><b>SET PL EXTENSIONS </b></span><font size="4"><span style="font-size:14pt">directive shall indicate the type of data modulation used:</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">a) ‘00’ = NRZ;</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">b) ‘01’ = Bi-Phase-Level (Manchester);</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">c) ‘10’ = Reserved;</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">d) ‘11’ = Reserved.</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
<br>
<font color="#FF0000">Options 00, 10, 11 are not included in the Proximity-1 Physical Layer Standard CCSDS 211.1-B-3 and therefore are not required for cross-support.</font> <br>
<br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">A1.8.8 <b>Carrier Modulation</b></span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">Bits 3-4 of the </span></font></font><font face="Times New Roman"><span style="font-size:11pt"><b>SET PL EXTENSIONS </b></span><font size="4"><span style="font-size:14pt">directive shall indicate the type of carrier modulation to be used:</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">a) ‘00’ = No Modulation;</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">b) ‘01’ = PSK;</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">c) ‘10’ = FSK;</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
</span></font><font size="4"><font face="Times New Roman"><span style="font-size:14pt">d) ‘11’ = QPSK.</span></font></font><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt"> <br>
<br>
<font color="#FF0000">Options 00, 10, 11 are not included in the Proximity-1 Physical Layer Standard CCSDS 211.1-B-3 and therefore are not required for cross-support.</font> <br>
<br>
<br>
</span></font><span style="font-size:11pt"><font face="Consolas, Courier New, Courier">I hope you can agree with this change request.</font><font face="Calibri, Verdana, Helvetica, Arial"> <br>
<br>
</font><font face="Consolas, Courier New, Courier">Best Regards, Enrico</font><font face="Calibri, Verdana, Helvetica, Arial"> <br>
</font><font face="Consolas, Courier New, Courier"><br>
> <br>
> <br>
> All,<br>
> <br>
> I have put the update (based upon the discussion at the previous SLP<br>
> telecon held on Feb 15, 2011) onto the CWE at<br>
> <br>
> <a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%">http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%</a></font><font face="Calibri, Verdana, Helvetica, Arial"> <<a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%">http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%</a>> <br>
</font><font face="Consolas, Courier New, Courier">> 2fdocs%2fSLS-SLP%2fMeeting%20Materials%2f2011%<br>
> 2fSpring&FolderCTID=&View={16ACDA38-FFA3-4657-8F27-B166C23C24A2}<br>
> <br>
> Note that this version still contains some open assigned actions taken<br>
> during last weeks telecon to be filled in shortly.<br>
> The review will continue with those action items first and then<br>
> proceed to the beginning of Chap. 5 where we left off.<br>
> <br>
> Best regards,<br>
> <br>
> Greg Kazz<br>
> Chairman CCSDS SLS-SLP WG<br>
> <br>
> On 2/16/11 8:48 AM, "gkazz" <<a href="greg.j.kazz@jpl.nasa.gov">greg.j.kazz@jpl.nasa.gov</a>> wrote:<br>
> <br>
> Dear SLS-SLP,<br>
> <br>
> The next SLP Telecon to review the Prox-1 Data Link Layer book is<br>
> planned for Feb. 28 at 8 – 10 AM Pacific (5 PM – 7 PM European Time) <br>
> The Teleconf. Meet me number is the same as last time: 818 393-1870<br>
> No pass code is necessary to access it.<br>
> <br>
> I will redistribute the Prox-1 data link layer draft book based upon<br>
> the results of our last telecon (held 15 Feb. ) and including the<br>
> results of the action items before the meeting.<br>
> <br>
> Thanks for your participation!<br>
> <br>
> Greg Kazz<br>
> Chairman SLS-SLP WG<br>
> _______________________________________________<br>
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</font><font face="Consolas, Courier New, Courier">> <br>
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------ End of Forwarded Message<br>
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