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<h3>Calibrating a Measurement Channel &nbsp;&nbsp;
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 </h3>

<p>Calibration is the process of eliminating systematic, reproducible errors 
 from the measurement results (system error correction). A measurement 
 channel can be calibrated either manually or automatically using the Calibration 
 Unit (accessory R&amp;S ZV-Z51/-Z52 or R&amp;S ZV-Z58): </p>

<p class=Linkline
	style="margin-top: 0pt;
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			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="#Manual_calibration"
	id=a2
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Manual 
 calibration</a><script type="text/javascript"
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															id=a9
															style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Automatic 
 calibration</a><script type="text/javascript"
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<h4><a name=Manual_calibration></a>To select and perform a manual calibration...</h4>

<p>In the following example a 2-port TOSM calibration is performed manually 
 using the <a HREF="../../MMI_Reference/Channel/Calibration/Guided_Calibration.htm"
				id=A5
				style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Calibration 
 Wizard</a><script type="text/javascript"
										language=JavaScript1.2><!--
kadovInitEffects('A5');
//--></script>. 
 Other calibrations can be performed in an analogous way. </p>

<ol>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Perform all channel 
 settings for your measurement. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Channel 
 &#8211; Calibration 
 &#8211; Start 
 Cal &#8211; 
 Two Port P1 P2 &#8211; 
 Manual... </I></span>to open the calibration wizard for the desired calibration 
 type. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>In the <span style="font-style: italic;"><I>Select 
 Physical Port Connector(s) </I></span>dialog, select the connector type that 
 you use at port 1 and 2 (both connector types must be equal) and the <a 
 HREF="../../MMI_Reference/Channel/Calibration/Calibration_Kits.htm"
	id=A6
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">calibration 
 kit</a><script type="text/javascript"
									language=JavaScript1.2><!--
kadovInitEffects('A6');
//--></script>. 
 Click <span style="font-style: italic;"><I>Next &gt; </I></span><span>to access 
 the </span><span style="font-style: italic;"><I>Measure Standards </I></span><span>dialog</span><span 
 style="font-style: italic;"><I>.</I></span> </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Connect an open standard 
 to port 1 and click the corresponding box in the <span style="font-style: italic;"><I>Measured 
 Standards </I></span>list to initiate the calibration sweep and acquire the 
 calibration data for this standard. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Repeat the last step 
 for a short and a match connected to port 1, an open, short and match 
 connected to port 2, and for a through between both ports.</p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Apply 
 </I></span>to<span style="font-style: italic;"> <I></I></span>start the calculation 
 of the system error correction data, apply them to the current channel 
 and close the calibration wizard. </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Replace the last measured 
 standard with your DUT and perform calibrated measurements without changing 
 the channel settings used for calibration. </p></li>
</ol>

<p>You can also access manual calibration from the <span style="font-style: italic;"><I><a 
 href="../../MMI_Reference/System/Measurement_Wizard.htm"
	id=a11
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Measurement 
 Wizard</a><script type="text/javascript"
										language=JavaScript1.2><!--
kadovInitEffects('a11');
//--></script>.</I></span></p>


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


<h4><a name=Automatic_calibration></a>To perform an automatic calibration...</h4>

<p>In the following example a 4-port TOSM calibration is performed using 
 the calibration unit (accessory R&amp;S ZV-Z51/-Z52 or R&amp;S ZV-Z58). 
 The calibration of other numbers of ports is analogous; see <a HREF="../../System_Overview/Calibration/Automatic_Calibration.htm#Performing_an_Automatic_Calibration"
	id=A7
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Performing 
 an Automatic Calibration</a><script type="text/javascript"
														language=JavaScript1.2><!--
kadovInitEffects('A7');
//--></script>. 
 </p>

<p>Connect the calibration unit: </p>

<ol>
	
	<li style="/*begin!kadov{{*/ font-weight: normal; /*}}end!kadov*/ "
		class=kadov-p-CProcedure><p class=Procedure
									style="font-weight: normal;">Switch 
 on and start-up your network analyzer and establish a USB connection to 
 the calibration unit; see <a HREF="../../System_Overview/Calibration/Automatic_Calibration.htm#Connection_and_Installation"
								id=A3
								style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Connecting 
 the calibration unit</a><script type="text/javascript"
													language=JavaScript1.2><!--
kadovInitEffects('A3');
//--></script>. 
 </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Connect ports 1 the 
 unit to port 1 of the analyzer; repeat this for ports 2 to 4. </p></li>
</ol>

<p>Perform the calibration: </p>

<ol start=3>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Click <span style="font-style: italic;"><I>Channel 
 &#8211; Calibration 
 &#8211; Start 
 Cal &#8211; 
 Four Port P1 P2 P3 P4 &#8211; 
 Calibration Unit </I></span><span>and wait until the calibration is completed</span><span 
 style="font-style: italic;"><I>. </I></span><span>If a message box </span><span 
 style="font-style: italic;"><I>All test port connectors will be changed to 
 &lt;Connector type&gt; </I></span><span>pops up, confirm with </span><span 
 style="font-style: italic;"><I>OK.</I></span> </p></li>
	
	<li class=kadov-p-CProcedure><p class=Procedure>Remove the connecting 
 cables from the unit, connect your DUT instead and perform calibrated 
 measurements. </p></li>
</ol>

<p>You can also access automatic calibration from the <span style="font-style: italic;"><I><a 
 HREF="../../MMI_Reference/System/Measurement_Wizard.htm"
	id=A1
	style="/*begin!kadov{{*/ position: relative; /*}}end!kadov*/ ">Measurement 
 Wizard</a><script type="text/javascript"
										language=JavaScript1.2><!--
kadovInitEffects('A1');
//--></script>.</I></span></p>


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