Because it is a free version, PSpice 9.1 includes several constraints designed for educational use rather than professional production:
The student version provides a virtual laboratory environment where users can perform several types of essential circuit analyses: pspice 9.1 student version free download
PSpice 9.1 Student Version is a legacy electronic circuit simulation tool widely used in electrical engineering curricula to model and analyze the behavior of analog and mixed-signal designs. Despite its age, it remains a popular choice for students due to its simplicity and the fact that it is provided as a free, "lite" version of the professional OrCAD software suite. Key Features and Capabilities Because it is a free version, PSpice 9
Analyzes the frequency response of AC circuits. Because it is a free version