1、The characters in the formula only support the parameter characters that have been set in the parameter settings.

2、Operators support'+','-','*','/','(',')' and combination operations.

3、The value of the lowercase letter parameter in the waveform formula is transferred to the waveform by the software, and the uppercase letter parameter directly uses the default value.

4、Special points. In the formula of the current node, t/T means time, V/v means voltage coefficient, lowercase letter t/v uses user parameters, and uppercase letter T/V uses default values; When the letter T/V (not case sensitive) is used as a parameter, the “user time increment” will be added to the “node time” when calculating the “node time”. When calculating the "node voltage", the "user voltage coefficient" will be multiplied by the formula result to get the final "node voltage";