3: Setting up PMUs and PGUs in Clarius  Model 4200A-SCS Pulse Card (PGU and PMU) 
 
3-46  4200A-PMU-900-01 Rev. B March 2023 
 
Figure 73: Vd-Id family of curves with LLEC enabled (every curve finishes at Vd = 12 V) 
 
For user test modules (UTMs), although the process described above applies, there are a few 
differences. Although ITMs and UTMs can perform similar tests, UTMs are based on user modules. 
UTMs have a much wider range of test behaviors and possibilities than ITMs. This document provides 
a framework for troubleshooting UTMs (individual UTM issues are not covered). 
In addition to the above procedure based on unexpected results, UTM troubleshooting also involves 
error messages or codes. Typically, the user modules are written for a specific test or requirement 
and have minimal error checking. This means that parameter values or combinations of parameter 
settings may cause an error, which is the primary feedback about the test status. 
This error may be generated from within the user module, or by an LPT command. The following 
figure shows the user module description for PMU_IV_sweep_Example. This description is part of 
the user module and may contain a description of the test, hardware requirements, individual 
parameter descriptions, and error code listings. The error code listings are after the parameter 
descriptions, which are typically at the bottom of the description content (you will need to scroll down 
the Help pane).