如何传输用户定义的方程

您好社区，我想使用ENA 5071 C使用混合模式S参数进行测量。因此，我在夹具模拟器中启用了平衡 - 不平衡转换。
显示屏现在显示所需的混合模式参数Sdd11，Sdd112 ... Scc22。
但是如何将实际显示的曲线曲线传送到MS Excel（通过LAN）？
*我正在使用Agilent VEE和MS Excel / VBA，但是将命令'instrument.WriteString：：CALC1：PAR1：DEF Scd12“'发送到ENA会导致错误，因为此命令仅针对带有i和j的Sij指定
= 1..4。*那么如何选择所需的混合模式S参数以及如何读取它？
*编辑*我尝试了一些事情，但只是更加困惑... instrument.WriteString“：CALC1：PAR1：SEL”instrument.WriteString“：CALC1：TRAC1：EQU：STATE ON”instrument.WriteString“：CALC1：TRAC1：
EQU：TEXT'sdd_test = S21 /（1-S11）'“instrument.WriteString”：CALC1：TRAC1：EQU：TEXT？“
equ_string = instrument.ReadString（）MsgBox equ_string - >定义我自己的方程式，在左上角，跟踪符号变为“Tr1 Sdd_test Log Mag 10.000db / Ref 0.000db [Equ]”，命令MsgBox equ_string给出
'sdd_test = S21 /（1-S11）'如预期的那样。
显然混合模式S参数没有定义为方程式？！??！
至少右列中的所有定义都保持不变（Sdd11，Sdd12 ....）。
instrument.WriteString“：CALC1：PAR1：TNAM：DATA tracename”instrument.WriteString“：CALC1：PAR：TNAM：DEF？tracename”equ_string = instrument.ReadString（）MsgBox equ_string - >跟踪1在通道1（在我的
实验我总是假设是活动跟踪）被赋予名称'tracename'。
MsgBox equ_string显示正确的分配，返回'tracename'作为结果。
但是在ENA的显示屏上，注释“tracename”不会出现在任何地方。
它是否正确 ？
它仍然按照我的预期说“Tr1 Sdd_test Log Mag 10.000db / Ref 0.000db [Equ]”而不是“tracename sdd_test Log Mag 10.000db / Ref 0.000db [Equ]”。
instrument.WriteString“：CALC1：PAR1：TNAM：DATA？”
equ_string = instrument.ReadString（）MsgBox equ_string - >最令人惊讶的结果：equ_string现在包含“S11”。
但为什么 ？？？
为什么它不包含“Sdd_test”，因为之前的所有操作都涉及相同的Trace 1，Channel 1.此外，ENA在平衡模式下运行，所以我预计至少会有Sdd11。
但S11到底在哪里？编辑：Stephan Giesinger于2013年2月26日凌晨2点



     以下为原文

  Hello community,  

I want to make measurements with mixed mode S-parameters using the ENA 5071 C. Therefore I enabled the balance-unbalance conversion within the Fixture Simulator.
The display now shows the desired mixed mode parameters, Sdd11, Sdd112...Scc22.  
But how do I transfer the actual displayed trace curve to MS Excel (via LAN) ?  
*I am using Agilent VEE and MS Excel/VBA, but sending the command 'instrument.WriteString ":CALC1:PAR1:DEF Scd12" ' to the ENA, results in an error as this command is just specified for Sij with i and j = 1..4.*  

So how do I select the desired mixed-mode S-parameter and how to read it ?



*EDIT*

I tried a few things but just got more puzzled...  

instrument.WriteString ":CALC1:PAR1:SEL"
instrument.WriteString ":CALC1:TRAC1:EQU:STATE ON"
instrument.WriteString ":CALC1:TRAC1:EQU:TEXT 'Sdd_test=S21/(1-S11)'"
instrument.WriteString ":CALC1:TRAC1:EQU:TEXT?"
equ_string = instrument.ReadString()
MsgBox equ_string
     
--> Defining my own equation works, in the upper left corner the notation of the trace changes to "Tr1 Sdd_test Log Mag 10.000db/ Ref 0.000db [Equ]",  
Command MsgBox equ_string gives 'Sdd_test=S21/(1-S11)' as expected.  
Apparently the Mixed-Mode S-parameters are NOT defined as equations ?!??! At least all definitions in the right column remain unchanged (Sdd11, Sdd12....).  

instrument.WriteString ":CALC1:PAR1:TNAM:DATA tracename"
instrument.WriteString ":CALC1:PAR:TNAM:DEF? tracename"
equ_string = instrument.ReadString()
MsgBox equ_string

--> Trace 1 at channel 1 (which in my experiments I always assume to be the active trace) is assigned the name 'tracename'. MsgBox equ_string shows the correct assigment, returning 'tracename' as result.  
But on the display of the ENA the annotation 'tracename' doesn't appear anywhere. Is this correct ? It still says "Tr1 Sdd_test Log Mag 10.000db/ Ref 0.000db [Equ]" instead of "tracename sdd_test Log Mag 10.000db/ Ref 0.000db [Equ]" as I expected.  


instrument.WriteString ":CALC1:PAR1:TNAM:DATA?"
equ_string = instrument.ReadString()
MsgBox equ_string

--> The most surprising result: equ_string now contains "S11". But why ??? Why doesn't it contain "Sdd_test" as all previous operations concerned the same Trace 1, Channel 1. Furthermore the ENA is operated in balanced mode, so I would have expected at least Sdd11. But where the hell does S11 come from ?

Edited by: Stephan Giesinger on Feb 26, 2013 2:00 AM