<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body>
Hi Amanda,<br>
<br>
Thank you for the message, it’s nice to hear that there are ways to reduce the NMR scan time. I think, based on my experience, we can go with the 25s+13,324 mode. Let me run some tests under these conditions and try to match the old calibrations, and then give
you the right answer.<br>
<br>
Best regards,<br>
<br>
Xiangdong
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> dsg-hdice <dsg-hdice-bounces@jlab.org> on behalf of Amanda Hoebel <amandah@jlab.org><br>
<b>Sent:</b> Wednesday, February 20, 2019 4:17:26 PM<br>
<b>To:</b> dsg-hdice@jlab.org<br>
<b>Subject:</b> [dsg-hdice] NMR cycle timing</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif">
<p style="margin-top:0; margin-bottom:0"></p>
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif,"EmojiFont","Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols">
<p style="margin-top:0; margin-bottom:0"></p>
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif,"EmojiFont","Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols">
<p style="margin-top:0; margin-bottom:0">Hi Xiangdong,</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">We looked at the time it took for each NMR cycle for fixed Tdown and Tup times (Tdown=Tup). We also looked at the number of stored points for each cycle and graphed the points per second. Both graphs are attached.
<span> The dip in the timing which occurs after Tdown=Tup=30 seconds indicates a change in the lock-in amplifier's data acquisition rate.
</span></p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">The time for <span>Tdown=Tup=25 seconds</span> is 133 seconds with 13,324 data points. The time for Tdown=Tup=30 seconds is 157 seconds with 15,857 data points. Could the cycles be run at
<span>Tdown=Tup=25</span> seconds to make up for the timing difference between Windows 10 and Windows 7? Dropping acquisition speed at
<span>Tdown=Tup=</span>30 seconds to give a faster cycle time would give far less data points than running the cycle at
<span>Tdown=Tup=</span>25 seconds (~8,000 data points).</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">Regards,</p>
<p style="margin-top:0; margin-bottom:0">Amanda<br>
</p>
</div>
<p></p>
</div>
<p></p>
</div>
</div>
</body>
</html>