The DVM control symbol is a data-storage element containing a library of specification information about the circuit being tested. By saving the specifications for the circuit being tested to the schematic, a single testplan can be used since the specification information is stored with the schematic rather than in the testplan. The same testplan used on a 5V input, 1.5V output synchronous buck converter can be used on a 400V input, 12V output LLC converter without any modification. The DVM control symbol is, however, electrically inactive and does not contribute to the netlist.
To use DVM automation, you must have one of the two types of DVM control symbols on the schematic:
The Full Power Assist control symbol is required when using the built-in testplans, as these testplans do not contain any specification information, such as the input voltage or output current.
Preparing to use DVM does involve the following recommended design flow process:
For more information on these steps of the DVM process, see 1.0 Introduction: What is DVM?