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What's the difference between .probe and .print?

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shaq

shaq

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difference between probe and print

Dear all,

Can someone tell me the difference between .probe and .print command in Hspice?

I only know if I want to use .probe command, I need to add ".option probe" in my spcie file.
 

hi,
why not to refer to Hspice userguide
 

.print will print the value in text format for you, so you can checkout the text output format.

.probe enable you to store the simulation output in a special file that you can use a waveform viewer to view the signals. eg i9f you want to see volt at node v1, you will write
.probe v1
and then in your option, you add
.option probe

correct me if I am wrong,
 

wpchan05 said:
.print will print the value in text format for you, so you can checkout the text output format.

.probe enable you to store the simulation output in a special file that you can use a waveform viewer to view the signals. eg i9f you want to see volt at node v1, you will write
.probe v1
and then in your option, you add
.option probe

correct me if I am wrong,
Click to expand...

Dear wpchan05,

If I want to see the voltage at node 1, I also can write '.print dc v1' .

And, you say that '.probe can store the simulation output in a file'.

My question is how to specify the output file?

Thanks.
 

they are same in some simulation tools.
 

probe will show the waves in tr0 file.print will give a result in .lis file
 

wpchan05 said:
....
My question is how to specify the output file?
Thanks.
Click to expand...

The extension of the output files are .tr#, .sw#, .ft# ... depend on your simulation type. for the detail you'd better refer to the Hspice manual

btw: If graphical interface tools(such as: avanWaves, xp ect. ) are used to view the simulation result. they will recognize it automated
 

If you use scope to see the waveform, the .probe and .print is the same.

The different between is that .probe will draw node voltage schematic in .lis file.
And .print will print the node value in .lis file.

Can you test this two together and see the different in .lis.
 

if you use .options probe then you must add .probe *** in your sim file;the .options probe means only probe the special node in output file ,if don't special node then hspice will not probe any wave.
 
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