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difficulty to export datafile

Question asked by xuzhu on Jan 8, 2007
Latest reply on Jan 11, 2007 by xuzhu

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I got some difficulty to export datafile in ADS simulation.

My hardware:
I have ADS2005A installed on a HP Windows XP workstation.

Software installation: following prompt instruction with ADS installed at C:\ADS2005A, and projects are lumped in C:\ADS_users.

I tried two examples, ID 142322 and ID 218849, and none of them went through.

I followed the instruction "How do I install custom AEL expressions in ADS?". My system setup doesn't has the search path for "C:\ADS2005A\expressions\ael" directory. I tried to load the "writepara.ael" with full pathname and put this file in my current project directory followed by loading it. The loading looks normal.
Then I run "dsp_sim" design by clicking the "Simulate" icon on toolbar, I always got following error, "Unable to resolve variable(s) or function(s) in expression 'Export = writepara2d(FileName, "W", Header, Delimiter,N1, N2, NBits)' writepara2d ".
It seems to me something is not interpreted correctly.

I looked at the code of "writepara.ael",
the definition of fuction, "defun writepara2d(Filename, WriteAppend, HeaderText, Delimiter)", has less input parameters than in schematic MeasEqn. Does it matter?

Did I miss some steps or my ADS system setting need to be changed?

Thanks,

Xu

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mfredrik Jan 8, 2007 10:48 AM

I find it strange that you don't have the C:\ADS2005A\expressions\ael folder - if you have ADS installed in C:\ADS2005A. A standard install of ADS does have an expressions folder in it.

Anyway, you could use the new built-in function write_var instead of writepara. The write_var function works in a similar way as writepara - but doesn't have to be loaded in a special way since it is a built in function. writepara was written as a workaround before the write_var function was included as a built-in function.

If you still want to use writepara then you need to put the writepara.ael file in
Â Â
$HOME/hpeesof/expressions/ael Â Â (User config)

or
Â Â Â Â
$HPEESOF_DIR/custom/expressions/ael (Site config)

(Create the subfolders if they don't already exist)

Then you need to create a new file user_defined_fun.ael in the same directory, if it doesn't already exist.

Add this line in the user_defined_fun.ael file:

load("writepara");

Restart ADS.

This is all explained in the AEL Expression installation document.

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xuzhu Jan 10, 2007 9:56 AM

Mats,

Finally I found out my problem. I need to made/modify the file, "user_defined_fun.ael ". It is kind of .cshrc file in the unix system. ASll you suggested methods works now.

I am looking into your code, write_touchstone.ael. In function set_meas_eqn_string(), where is defintion for deitem_get_attr_item_instance_names()? Does it return a list or something else?

Thanks,

Xu

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mfredrik Jan 10, 2007 10:39 AM

If you want to write a touchstone file, try using write_snp() instead of the unsupported writepara(). write_snp() is another built-in (=supported) function which is writing Touchstone files from S-parameter data.

-Mats

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xuzhu Jan 11, 2007 3:20 AM

Mats,

Got it, I will use write write_snp() to export datafile.

In my code, I would like to change the parameters in "MeasEqn".
I looked at the example (ID 8591) "Set Meas Equation Variable String", and could not find out any documentation for the function being called "deitem_get_attr_item_instance_name()". How does this one works? Is there a supported version for the function "set_meas_eqn_string" in the "set_meas_eqn_string.ael"?

Thanks,

Xu

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4 Replies

mfredrik Jan 8, 2007 10:48 AM
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Correct Answer
I find it strange that you don't have the C:\ADS2005A\expressions\ael folder - if you have ADS installed in C:\ADS2005A. A standard install of ADS does have an expressions folder in it.

Anyway, you could use the new built-in function write_var instead of writepara. The write_var function works in a similar way as writepara - but doesn't have to be loaded in a special way since it is a built in function. writepara was written as a workaround before the write_var function was included as a built-in function.

If you still want to use writepara then you need to put the writepara.ael file in
Â Â
$HOME/hpeesof/expressions/ael Â Â (User config)

or
Â Â Â Â
$HPEESOF_DIR/custom/expressions/ael (Site config)

(Create the subfolders if they don't already exist)

Then you need to create a new file user_defined_fun.ael in the same directory, if it doesn't already exist.

Add this line in the user_defined_fun.ael file:

load("writepara");

Restart ADS.

This is all explained in the AEL Expression installation document.
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xuzhu Jan 10, 2007 9:56 AM
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Correct Answer
Mats,

Finally I found out my problem. I need to made/modify the file, "user_defined_fun.ael ". It is kind of .cshrc file in the unix system. ASll you suggested methods works now.

I am looking into your code, write_touchstone.ael. In function set_meas_eqn_string(), where is defintion for deitem_get_attr_item_instance_names()? Does it return a list or something else?

Thanks,

Xu
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mfredrik Jan 10, 2007 10:39 AM
Mark Correct
Correct Answer
If you want to write a touchstone file, try using write_snp() instead of the unsupported writepara(). write_snp() is another built-in (=supported) function which is writing Touchstone files from S-parameter data.

-Mats
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xuzhu Jan 11, 2007 3:20 AM
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Correct Answer
Mats,

Got it, I will use write write_snp() to export datafile.

In my code, I would like to change the parameters in "MeasEqn".
I looked at the example (ID 8591) "Set Meas Equation Variable String", and could not find out any documentation for the function being called "deitem_get_attr_item_instance_name()". How does this one works? Is there a supported version for the function "set_meas_eqn_string" in the "set_meas_eqn_string.ael"?

Thanks,

Xu
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