求解释
Name : AC1PH - Steady-state (cosine) function. TYPE 14.Card : SOURCE
Data : U/I= 0: Voltage source. A radio button is used in newer ATPDraw versions.
-1: Current source.
Amp= The peak value in or of the function.
f= Frequence in .
pha= Phase shift in degrees or seconds depending on A1.
A1= 0: pha in degrees.
>0: pha in seconds.
Tsta= Starting time in . Source value zero for T<Tsta.
Tsto= Ending time in . Source value zero for T>Tsto.
Node : AC= Positive node of cosine function.
Negative node is grounded.
For trapped charge functions: Specify a current source, a very low frequency, Tsta=5432. and Tsto=0.
RuleBook: VII.C.4
请问红色字体是啥意思？
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