PSpice User Guide

PSpice User Guide

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PSpice User Guide Analyzing waveforms October 2019 725 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Comparing measured data with simulated data You can compare measured data with simulated data in the Probe. You need to import the measured data into the circuit to enable comparison. To import the data, perform the following steps: 1. Put the measured data into a text file as a list of two column rows. The first column specifies the time and the second column specifies the value at that time. Separate the columns using space. 2. Place a VPWL_file or IPWL_file part on the schematic. 3. Set the FILE_ATTRIBUTE property of the part to the path of the text file. If you placed the measured data text file in the profile folder, specify only the name of the text file. Otherwise, specify the absolute path to the file. 4. Terminate the placed VPWL_file or IPWL_file part with a resistor to ground. Note: Terminating the placed part to ground with a resistor ensures that the voltage across the resistor or current through the resistor represents the imported measured data. Probe displays the value of voltage or current as a trace when you run the simulation. You can compare this trace with the traces for simulated values. Saving simulation results in ASCII format The default waveform data file format is binary. However, you can save the waveform data file in the Common Simulation Data Format (CSDF) instead. Caution Data files saved in the CSDF format are two or more times the size of binary files. When you first open a CSDF data file, PSpice converts it back to the .DAT format. This conversion takes two or more times as long as opening a .DAT file. PSpice saves the new .DAT file for future use.

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