<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">

<html>

<head>
<title>Optimizing the Measurement Speed</title>
<meta http-equiv="content-type" content="text/html; charset=windows-1252">
<meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com">
<link rel="stylesheet" href="../../Manual_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">
<!--
if (navigator.appName !="Netscape")
{   document.write("<link rel='stylesheet' href='../../Manual.css'>");}
//-->
</script>
<style type="text/css">
<!--
img_whs1 { border:none; width:42px; height:18px; float:none; border-style:none; }
hr.whs2 { float:aligncenter; width:50%; x-condition:OLH; }
img_whs3 { border:none; width:36px; height:37px; float:none; }
ol.whs4 { list-style:decimal; }
img_whs5 { border:none; width:20px; height:23px; float:none; border-style:none; }
-->
</style><script type="text/javascript" language="JavaScript">
<!--
function ehlp_showtip(current,e,text)
{
  if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape'))
  {
    document.tooltip.document.write("<layer bgColor='yellow' style='border:1px solid black;font-size:12px;'>"+ text + "</layer>");
    document.tooltip.document.close();
    document.tooltip.left=e.pageX+5;
    document.tooltip.top=e.pageY+5;
    document.tooltip.visibility="show";
  }
}
function ehlp_hidetip()
{
  document.tooltip.visibility="hidden";
}
//-->
</script>
<script type="text/javascript" language="JavaScript" title="WebHelpInlineScript">
<!--
function reDo() {
  if (innerWidth != origWidth || innerHeight != origHeight)
     location.reload();
}
if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {
	origWidth = innerWidth;
	origHeight = innerHeight;
	onresize = reDo;
}
onerror = null; 
//-->
</script>
<style type="text/css">
<!--
div.WebHelpPopupMenu { position:absolute; left:0px; top:0px; z-index:4; visibility:hidden; }
-->
</style><script type="text/javascript" language="javascript1.2" src="../../whmsg.js"></script>
<script type="text/javascript" language="javascript" src="../../whver.js"></script>
<script type="text/javascript" language="javascript1.2" src="../../whproxy.js"></script>
<script type="text/javascript" language="javascript1.2" src="../../whutils.js"></script>
<script type="text/javascript" language="javascript1.2" src="../../whtopic.js"></script>
</head>
<body><script type="text/javascript" language="javascript1.2">
<!--
if (window.gbWhTopic)
{
	if (window.addTocInfo)
	{
	addTocInfo("Measurement Examples\nOptimization\nOptimizing the Measurement Speed");
addTocInfo("Measurement Examples\nOptimization\nOptimizing the Measurement Speed\nSweep points");
addTocInfo("Measurement Examples\nOptimization\nOptimizing the Measurement Speed\nMeas sequence");
addTocInfo("Measurement Examples\nOptimization\nOptimizing the Measurement Speed\nNoise reduction");
addButton("show",BTN_TEXT,"Show","","","","",0,0,"","","");

	}
	if (window.writeBtnStyle)
		writeBtnStyle();

	if (window.writeIntopicBar)
		writeIntopicBar(1);

	if (window.setRelStartPage)
	{
	setRelStartPage("../../Start.htm");

		autoSync(1);
		sendSyncInfo();
		sendAveInfoOut();
	}
}
else
	if (window.gbIE4)
		document.location.reload();
//-->
</script><script type="text/javascript" language="JavaScript1.2" src="../../ehlpdhtm.js" x-save-method="compute-relative" name="EHELP_DHTM"></script>
<script type="text/javascript"
		language=JavaScript1.2>
<!-- 
if( typeof( kadovInitEffects ) != 'function' ) kadovInitEffects = new Function();if( typeof( kadovInitTrigger ) != 'function' ) kadovInitTrigger = new Function();if( typeof( kadovFilePopupInit ) != 'function' ) kadovFilePopupInit = new Function();if( typeof( kadovTextPopupInit ) != 'function' ) kadovTextPopupInit = new Function();
 //-->
</script>


<h3>Optimizing the Measurement Speed &nbsp;&nbsp;
<a href="javascript:void(0);" onClick="var e; if (parseInt(navigator.appVersion)>=4){e=event;}  if (parseInt(navigator.appVersion) >=2 && typeof(PopupMenu_Invoke) == 'function') PopupMenu_Invoke(e,'','Channel - Stimulus','../../MMI_Reference/Channel/Stimulus/Channel_Stimulus.htm');return false;" title="Related Topics"><img src="../../ss_btn_related_topics.gif" border=0 height=20 width=96 alt="Related Topics"></a>


 </h3>

<p>Minimizing the measurement time per sweep contributes to a high measurement 
 throughput. The following parameters have an influence on the sweep time: 
 </p>

<p class=Linkline
	style="margin-top: 0pt;
			margin-bottom: 0pt;
			x-condition: OLH;"><img src="../../small_images/helpwoval3.gif" x-maintain-ratio="TRUE" width="42px" height="18px" border="0" class="img_whs1"> <a href="#Noise_reduction"
												id=a2
												style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ "><span 
 style="margin-bottom: 3pt; x-condition: OLH;">Selection of sweep points</span></a><script 
 type="text/javascript"
	language=JavaScript1.2><!--
kadovInitEffects('a2');
//--></script></p>

<p class=Linkline
	style="margin-top: 0pt;
			margin-bottom: 0pt;
			x-condition: OLH;"><span style="margin-bottom: 3pt;"><img src="../../small_images/helpwoval3.gif" x-maintain-ratio="TRUE" width="42px" height="18px" border="0" class="img_whs1"></span> <a href="#Noise_reduction"
						id=a9
						style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ "><span 
 style="margin-bottom: 3pt; x-condition: OLH;">Measurement sequence: Sweep 
 Time, Trigger, Alternate</span></a><script type="text/javascript"
	language=JavaScript1.2><!--
kadovInitEffects('a9');
//--></script></p>

<p class=Linkline
	style="margin-top: 0pt;
			margin-bottom: 0pt;
			x-condition: OLH;"><img src="../../small_images/helpwoval3.gif" x-maintain-ratio="TRUE" width="42px" height="18px" border="0" class="img_whs1"> <span style="margin-bottom: 3pt;"><a 
 href="#Noise_reduction"
	id=a5
	style="x-condition: OLH; /*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Noise 
 reduction settings</a><script type="text/javascript"
													language=JavaScript1.2><!--
kadovInitEffects('a5');
//--></script></span></p>


<hr align="center" width="50%" class="whs2">


<h4><a name=Sweep_points></a>To find the best set of sweep points...</h4>

<p>Limit the measurement to the stimulus range that you need for your device: 
 </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Channel 
 - Stimulus</I></span> to access the submenu defining the sweep range. </p></li>
	
	<li style="/*begin!kadov{{*/ font-style: normal; /*}}end!kadov*/ "
		class=kadov-p-CProcedure><p class=Procedure
									style="font-style: normal;">To define 
 a sweep range confined by a start and a stop frequency, use <span style="font-style: italic;"><I>Start</I></span> 
 and <span style="font-style: italic;"><I>Stop</I></span>. Alternatively, to define 
 a sweep range of definite width around a known center frequency (e.g. 
 an expected peak), use <span style="font-style: italic;"><I>Center</I></span> 
 and <span style="font-style: italic;"><I>Span</I></span>. For power and time 
 sweeps, proceed as described in <a HREF="../Basic_Tasks/Setting_up_a_Sweep.htm" id="A6" style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Setting 
 up a Sweep</a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('A6');
//--></script>. 
 </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Alternatively, use 
 the <a HREF="../../MMI_Reference/Trace/Marker_Funct/Marker_Funct..htm" id="A10" style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">marker 
 functions</a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('A10');
//--></script> 
 to define the sweep range. </p></li>
</ol>

<p>Use the minimum number of points that will produce an acceptable resolution: 
 </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Channel 
 &#8211; Sweep 
 &#8211; &nbsp;Number 
 of Points </I></span><span>and reduce the number of sweep points.</span></p></li>
</ol>

<p>Use the segmented sweep to focus on different subranges of the sweep, 
 using optimized channel settings for each subrange: </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Set up a segmented 
 frequency sweep as described in <a HREF="../Basic_Tasks/Setting_up_a_Sweep.htm#Segmented Frequency" id="A7" style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Segmented 
 Frequency</a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('A7');
//--></script>. 
 </p></li>
	
	<li style="/*begin!kadov{{*/ font-style: normal; /*}}end!kadov*/ "
		class=kadov-p-CProcedure><p class=Procedure
									style="font-style: normal;">Optimize 
 the number of points and the <a href="Optimizing_the_Measurement_Speed.htm#Noise_reduction"
								id=A8
								style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">noise 
 reduction</a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('A8');
//--></script> 
 settings for each individual sweep segment. </p></li>
</ol>

<p><img src="../../small_images/tip.jpg" x-maintain-ratio="TRUE" width="36px" height="37px" border="0" class="img_whs3"> The sweep time increases with the <span style="font-style: italic;"><I><a 
 HREF="../../MMI_Reference/Channel/Sweep/Number_of_Points.htm#Stimulus_Step_Size"
	id=A12
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Frequency 
 Step Size</a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('A12');
//--></script>.</I></span> 
 </p>


<hr align="center" width="50%" class="whs2">


<h4><a name=Meas_Sequence></a>To obtain the fastest measurement sequence...</h4>

<p>Avoid delay times between the different partial measurements: </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Channel 
 &#8211; Sweep 
 &#8211; &nbsp;Sweep 
 Time </I></span>and check <span style="font-style: italic;"><I>Auto</I></span>. </p></li>
</ol>

<p>The analyzer determines the minimum sweep time according to the current 
 channel settings. The sweep is performed at maximum speed without delay. 
 </p>

<p>Avoid delay times between the end of the measurement sequence and the 
 next trigger event: </p>

<ol start="2" type="1" class="whs4">
	
	<li class=kadov-p-CProcedure><p class=Procedure>If you don't need a 
 special trigger mode, click <span style="font-style: italic;"><I>Channel 
 &#8211; Sweep 
 &#8211; Trigger 
 </I></span><span>and make sure that </span><span style="font-style: italic;"><I>Free 
 Run </I></span><span>is selected</span><span style="font-style: italic;"><I>.</I></span> 
 </p></li>
</ol>

<p>Avoid delay times between adjacent frequency points. </p>

<ol start="3" type="1" class="whs4">
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click<span style="font-style: italic;"><I> 
 Channel &#8211; 
 Mode </I></span>and select <span style="font-style: italic;"><I><a HREF="../../MMI_Reference/Channel/Mode/Alternate.htm"
															id=A11
															style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Alternating 
 Sweeps</a><script type="text/javascript"
										language=JavaScript1.2><!--
kadovInitEffects('A11');
//--></script></I></span> 
 if the settling time between adjacent frequency points is larger than 
 the settling time between the partial measurements. </p></li>
</ol>


<hr align="center" width="50%" class="whs2">


<h4><a name=Noise_reduction></a>To find the appropriate noise reduction 
 settings...</h4>

<p>Use the fastest IF filter that will produce acceptable dynamic range: 
 </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Press the <span style="font-style: italic;"><I>POWER 
 BW AVG </I></span>key in the <span style="font-style: italic;"><I>Channel </I></span>keypad or click <span 
 style="font-style: italic;"><I>Channel &#8211; 
 Power Bandwidth Average </I></span>to access the corresponding<span style="font-style: italic;"> 
 <I></I></span>submenu. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Select the widest <a href="../../MMI_Reference/Channel/Power_Bandwidth_Average/Power_Bandwidth_Average.htm#Meas_Bandwidth" id="a1" style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">bandwidth</a><script 
 type="text/javascript"
	language=JavaScript1.2><!--
kadovInitEffects('a1');
//--></script> 
 compatible with your measurement task<span style="font-style: italic;"><I>.</I></span></p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>If possible, click 
 <span style="font-style: italic;"><I>Fine Adjust </I></span>to further increase 
 the bandwidth. Avoid selecting <span style="font-style: italic;"><I>High 
 Selectivity</I></span> unless it is required for your measurement.</p></li>
</ol>

<p>Reduce the number of repeated measurements made to obtain an averaged 
 result. Averaging does not slow down the measurement, however, several 
 consecutive sweeps must be performed until an average result is available. 
 </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>If averaging is not 
 necessary, open the <span style="font-style: italic;"><I>Channel &#8211; Power Bandwidth 
 Average</I></span> menu<span style="font-style: italic;"> <I></I></span>and<span 
 style="font-style: italic;"> <I></I></span>make sure that <span style="font-style: italic;"><I>Average 
 On </I></span>is not active. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Alternatively, click 
 <span style="font-style: italic;"><I><a href="../../MMI_Reference/Channel/Power_Bandwidth_Average/Power_Bandwidth_Average.htm#Average_Factor" id="a3" style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Average 
 Factor</a><script type="text/javascript"
										language=JavaScript1.2><!--
kadovInitEffects('a3');
//--></script></I></span> 
 and reduce the factor to a minimum. </p></li>
</ol>


<hr align="center" width="50%" class="whs2">


<p class=Linkline
	style="x-condition: OLH;"><a title="Back to top" href="Optimizing_the_Measurement_Speed.htm" id="a4" style="x-condition: OLH; /*begin!kadov{{*/ position: relative; /*}}end!kadov*/ " onmouseover="if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape')) ehlp_showtip(this,event,'Back to top');" onmouseout="if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape')) ehlp_hidetip();"><img src="../../small_images/baby_up.gif" x-maintain-ratio="TRUE" width="20px" height="23px" border="0" class="img_whs5"></a><script type="text/javascript"
											language=JavaScript1.2><!--
kadovInitEffects('a4');
//--></script></p>

<script type="text/javascript" language="JavaScript" title="WebHelpRelatedTopics"><!--
if (parseInt(navigator.appVersion) >= 3 && typeof (WritePopupMenuLayer) == "function")
  WritePopupMenuLayer();
//--></script><script type="text/javascript" language="JavaScript">
<!--
 if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape'))
  document.write("<div id='tooltip' class='WebHelpPopupMenu'></div>");
//-->
</script><script type="text/javascript" language="javascript1.2">
<!--
if (window.writeIntopicBar)
	writeIntopicBar(0);
//-->
</script>
</body>
</html>
