AnsweredAssumed Answered

vrf Problem with display

Question asked by VRFuser on Mar 28, 2004
Latest reply on Mar 28, 2004 by VRFuser
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><TITLE>.NET in VEE7</TITLE><META content="MSHTML 6.00.2800.1400" name=GENERATOR><STYLE></STYLE></HEAD><BODY bgColor=#ffffff><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2>Hi Bern and the vrf,</FONT></SPAN></DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2>I have not been able to reproduce the results you showed in the jpg. did these results come from the original program example you posted, or do you have a modified example?</FONT></SPAN></DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2>Did you probe the trace going into the graph and look at the data to see if it "made sense" when it came out of the formula?</FONT></SPAN></DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2>Best Regards,</FONT></SPAN></DIV><DIV><SPAN class=147163222-29032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV><DIV> </DIV><P><FONT size=2>Scott Bayes<BR>Software Technical Support<BR><BR>Agilent Technologies, Inc.<BR>815 14th Street S.W.<BR>Loveland, CO, U.S.A. 80537<BR><BR>970 679 3799 Tel<BR>970 635 6867 Fax</FONT> </P><BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">  <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma   size=2>-----Original Message-----<BR><B>From:</B> Bern Muller   [mailto:bernhard.muller@dlcdesignaudio.com]<BR><B>Sent:</B> Monday, March 29,   2004 1:17 PM<BR><B>To:</B> BAYES,SCOTT (A-Loveland,ex1); PDL-LISTS,VRF   (A-Lists,unix1)<BR><B>Subject:</B> Re: [vrf] RE: Problem with   display<BR><BR></FONT></DIV>  <DIV>  <DIV>  <DIV><FONT face=Arial size=2>Sorry to have left lots of old communications,   but I thought it might be helpful for clarity.</FONT></DIV>  <DIV><FONT face=Arial size=2>Attached are small .jpg of the correct and   defective spectrum displays from the "good" and "bad" computers. The markers   are pointing to the first data bin after the DC data bin (which has a value   about 80 infinitely far to the left. The different Y values at the pointer are   due to the fact that it is a noise signal.) In the defective display notice   that the marker is pointing to the actual value in that bin (the marker can't   be moved up to where the trace is) and that the trace is in the wrong   place. The distance that the trace "hangs over" too far to the right   varies from sample to sample. This error in where the trace is only happens on   this one computer, and only when the display is in "log" mode. This behavior   persists after complete uninstall/reinstall of VEE. What could be causing this   error in how the data is displayed? I find it fascinating that the marker   "knows" where the trace should be, but the trace doesn't "know" where it   should be. I am concerned in part because I wonder if I am having a very   subtle computer hardware failure. Any help or suggestions much   appreciated.</FONT></DIV>  <DIV><FONT face=Arial size=2></FONT> </DIV>  <DIV><FONT face=Arial size=2>bern muller</FONT></DIV></DIV></DIV>  <BLOCKQUOTE   style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">    <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>    <DIV     style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>     <A title=scott_bayes@agilent.com     href="mailto:scott_bayes@agilent.com">BAYES,SCOTT (A-Loveland,ex1)</A> </DIV>    <DIV style="FONT: 10pt arial"><B>To:</B> <A title=vrf@agilent.com     href="mailto:vrf@agilent.com">VRF</A> </DIV>    <DIV style="FONT: 10pt arial"><B>Cc:</B> <A     title=bernhard.muller@dlcdesignaudio.com     href="mailto:bernhard.muller@dlcdesignaudio.com">Bern Muller</A> </DIV>    <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 25, 2004 2:42     PM</DIV>    <DIV style="FONT: 10pt arial"><B>Subject:</B> [vrf] RE: Problem with     display</DIV>    <DIV><BR></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=840363219-25032004>Hi     Bern and the vrf,</SPAN></FONT></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004></SPAN></FONT> </DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004>|DISCLAIMER>I'm not a EE|/DISCLAIMER>     but it looks to me like the DC component inserted by the slider is what's     makings things appear strange.</SPAN></FONT></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004></SPAN></FONT> </DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=840363219-25032004>As     an experiment I set the X axis to Linear and turned on autoscale for both     axes. Now when I run it, I see at freq 0 a component that correlates well     with the DC inserted by the slider. Clicking on the trace from the formula     out shows the first component is quite large compared to the other     components when the slider is at 1, and it correlates with the slider value.     I think that is the DC component.</SPAN></FONT></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004></SPAN></FONT> </DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=840363219-25032004>If     X is log-scaled as you had it, you have to scroll forever to see the left     edge (and of course log(0) doesn't exist anyway, just -1E-308 or whatever     the tiniest Real64 is). But if you keep scrolling left, you see the line     keeps rising to meet its DC magnitude.</SPAN></FONT></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004></SPAN></FONT> </DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004>When I inserted the following formula between the     mag() formula and the graph, I saw what I think you are expecting: the graph     is pretty well insensitive to the slider.</SPAN></FONT></DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004></SPAN></FONT> </DIV>    <DIV><FONT face=Arial color=#0000ff size=2><SPAN     class=840363219-25032004>    A[1:128]</FONT><FONT     face=Arial><FONT size=2><FONT color=#0000ff> // drop component     0</SPAN></DIV></FONT></FONT></FONT>    <DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>    <DIV><SPAN class=840363219-25032004><FONT face=Arial color=#0000ff     size=2>Best Regards,</FONT></SPAN></DIV>    <DIV><SPAN class=840363219-25032004><FONT face=Arial color=#0000ff     size=2></FONT></SPAN> </DIV>    <P><FONT size=2>Scott Bayes<BR>Software Technical Support<BR><BR>Agilent     Technologies, Inc.<BR>815 14th Street S.W.<BR>Loveland, CO, U.S.A.     80537<BR><BR>970 679 3799 Tel<BR>970 635 6867 Fax</FONT> </P>    <BLOCKQUOTE dir=ltr     style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">      <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma       size=2>-----Original Message-----<BR><B>From:</B> Bern Muller       [mailto:bernhard.muller@dlcdesignaudio.com]<BR><B>Sent:</B> Tuesday, March       23, 2004 9:33 AM<BR><B>To:</B> VRF<BR><B>Subject:</B> [vrf] Problem with       display<BR><BR></FONT></DIV>      <DIV><FONT face=Arial size=2>I am having a problem with the display of       spectrum on only one of my computers. Attached is a very simple program       that generates noise, and applies a variable offset to it. When run, the       spectrum display should hardly change when the slider is moved, which is       how it works on my laptop. However, on the desktop, the spectrum display       shows the baseline rising almost to full scale and bouncing around on the       left half of the spectrum display as the slider is moved up. The spectral       array going to the spectrum display is correct and the display does       not accurately reflect the data going into the display. I uninstalled       and reinstalled VEE on this computer in case there was a corrupt file.       This did not help. I am convinced some computer defect is causing this       display module to misbehave, but what? Any suggestions?</FONT></DIV>      <DIV><FONT face=Arial size=2></FONT> </DIV>      <DIV><FONT face=Arial size=2>Win 98SE, Vee 6.2</FONT></DIV>      <DIV><FONT face=Arial size=2></FONT> </DIV>      <DIV><FONT face=Arial size=2>thanks</FONT></DIV>      <DIV><FONT face=Arial size=2></FONT> </DIV>      <DIV><FONT face=Arial size=2>bern muller</FONT></DIV></BLOCKQUOTE>---<BR>You     are currently subscribed to vrf as: bernhard.muller@dlcdesignaudio.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@agilent.com". <BR>If you need     help with the mailing list send a message to     "owner-vrf@it.lists.it.agilent.com". </BLOCKQUOTE></BLOCKQUOTE>---<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@agilent.com".  <BR>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>  

Outcomes