<html 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=Windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Aptos;
panose-1:2 11 0 4 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:12.0pt;
font-family:"Aptos",sans-serif;
mso-ligatures:standardcontextual;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#467886;
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;
font-size:12.0pt;
font-family:"Aptos",sans-serif;
mso-ligatures:standardcontextual;}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@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:1685940862;
mso-list-template-ids:-2056997184;}
@list l1
{mso-list-id:1726831560;
mso-list-type:hybrid;
mso-list-template-ids:1381682566 67698705 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l1:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l1:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l1:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style>
</head>
<body lang="EN-US" link="#467886" vlink="#96607D" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Hi Folks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We still have some confusion about setting the prescale factors using the GUI. Hanjie contacted me and we need to be sure everyone understands how to use the GUI.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">After a run is ended, if you wish to change a prescale factor, you may kill and restart the GUI if you wish; Hanjie believes this is unnecessary, but
it won’t hurt.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">In between runs you can change the prescale values or use set rate functions to determine which ps value you want and evaluate the trigger rate.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">Recall you can either “prestart” then “go” manually or “start” which performs both “prestart” followed automatically by “go”. Hover the cursor over the
coda buttons to make sure you know which is which. Normally we use “start” (>>). You should never begin the run with “go” without a “prestart.”<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">You must press SAVE, before starting or prestarting the run.<o:p></o:p></span></li><li class="MsoListParagraph" style="color:black;margin-left:0in;mso-list:l1 level1 lfo3">
<span style="font-size:11.0pt">The scalers are disabled during “prestart” and won’t be enabled until the end of “Go”, so between “prestart”, CODA shows run “active” in green. There is no scaler readout, so the prescale GUI and the xscaler shows no rate; people
may have interpreted this as the GUI being hung, but it’s actually not.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">If you SAVE after prestarting, the ps values will not be read in by CODA, so if you did this, you’ll have to end the run and begin the process again.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">You can find a lot of useful DAQ info at
<span class="apple-converted-space"><span style="color:black"> </span></span><a href="https://hallcweb.jlab.org/wiki/index.php?title=Hall_C_DAQ" title="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhallcweb.jlab.org%2Fwiki%2Findex.php%3Ftitle%3DHall_C_DAQ&data=05%7C02%7Cedward.kinney%40colorado.edu%7C432f58a28a934074a49108ddc8789c1b%7C3ded8b1b070d462982e4c0b019f46057%7C1%7C0%7C6388871"><span style="color:#96607D">https://hallcweb.jlab.org/wiki/index.php?title=Hall_C_DAQ</span></a>.
Don’t hesitate to ask the RC if you have a question!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Ed, your RC!<o:p></o:p></span></p>
</div>
</body>
</html>