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vrf Possible File I/O Bug?? At least a "gotcha"!

Question asked by VRFuser on Nov 4, 2002
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><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="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"><meta name=ProgId content=Word.Document><meta name=Generator content="Microsoft Word 9"><meta name=Originator content="Microsoft Word 9"><link rel=File-List href="cid:filelist.xml@01C284A4.68E905C0"><!--[if gte mso 9]><xml> <o:OfficeDocumentSettings>  <o:DoNotRelyOnCSS/> </o:OfficeDocumentSettings></xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument>  <w:Zoom>0</w:Zoom>  <w:DocumentKind>DocumentEmail</w:DocumentKind>  <w:EnvelopeVis/>  <w:DrawingGridHorizontalSpacing>3.75 pt</w:DrawingGridHorizontalSpacing> </w:WordDocument></xml><![endif]--><style><!-- /* Font Definitions */@font-face     {font-family:Tahoma;     panose-1:2 11 6 4 3 5 4 4 2 4;     mso-font-charset:0;     mso-generic-font-family:swiss;     mso-font-pitch:variable;     mso-font-signature:16792199 0 0 0 65791 0;} /* Style Definitions */p.MsoNormal, li.MsoNormal, div.MsoNormal     {mso-style-parent:"";     margin:0in;     margin-bottom:.0001pt;     mso-pagination:widow-orphan;     font-size:12.0pt;     font-family:"Times New Roman";     mso-fareast-font-family:"Times New Roman";}p.MsoAutoSig, li.MsoAutoSig, div.MsoAutoSig     {margin:0in;     margin-bottom:.0001pt;     mso-pagination:widow-orphan;     font-size:12.0pt;     font-family:"Times New Roman";     mso-fareast-font-family:"Times New Roman";}span.EmailStyle15     {mso-style-type:personal-reply;     mso-ansi-font-size:10.0pt;     mso-ascii-font-family:Arial;     mso-hansi-font-family:Arial;     mso-bidi-font-family:Arial;     color:navy;}@page Section1     {size:8.5in 11.0in;     margin:1.0in 1.25in 1.0in 1.25in;     mso-header-margin:.5in;     mso-footer-margin:48.25pt;     mso-title-page:yes;     mso-paper-source:0;}div.Section1     {page:Section1;}--></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1027"/></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 bgcolor=white lang=EN-US style='tab-interval:.5in'><div class=Section1><p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><spanstyle='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Well, itwas a lifetime ago, but I did write a vee classic driver for this beast.<spanstyle="mso-spacerun: yes">  </span>I don’t know if that would be of anyhelp, but it does perform the basic functions.<span style="mso-spacerun:yes">  </span>It has been nearly 10 years, so I don’t recall any detailson programming, except that it was a beast.<o:p></o:p></span></font></span></p><p 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<b><span style='font-weight:bold'>From:</span></b> Ciaran Marmion[mailto:cmarmion@celeritek.com]
<b><span style='font-weight:bold'>Sent:</span></b> Monday, November 04, 20026:13 PM
<b><span style='font-weight:bold'>To:</span></b> VEE vrf
<b><span style='font-weight:bold'>Subject:</span></b> [vrf] Agilent 4142B SMU</span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><spanstyle='font-size:12.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=2 color=blackface=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Hithere,</span></font><font color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=2 color=blackface=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Doesanyone have any experience on programming the Agilent 4142B SMU from Vee. Iparticular I want to program the AFU (Analog feedback Unit) to set a desiredcollector current in a HBT. I have written a program that more or less doesthis but if I increase the desired current required, an error is intoduced(e.g. up to 20 or 30mA is ok, but if I try to set 40mA, it only sets up approx32mA, and the error gets larger as the current is increased). The commands thatI am using are shown in the attached image (the entire program is too big toattach). I basically want the AFU to find the required base voltage to set up arequired collector current and then input this base voltage to set a constantcollector current.</span></font><font color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=3 color=blackface="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><fontcolor=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=2 color=blackface=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Anyhelp would be greatly appreciated,</span></font><font color=black><spanstyle='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=2 color=blackface=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Thanks,</span></font><fontcolor=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p><p class=MsoNormal style='margin-left:.5in'><font size=2 color=blackface=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Ciaran.</span></font><fontcolor=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p></div>---<BR>You are currently subscribed to vrf as: rsb@soco.agilent.com<BR>To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".<BR>To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".<BR>To send messages to this mailing list,  email "vrf@it.lists.it.agilent.com".  <BR>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></html>  

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