求解释

忍者22

Name : AC1PH - Steady-state (cosine) function. TYPE 14.
6 d6 M& n: X5 b9 \3 c) @: ]" wCard : SOURCE
" S, }5 `0 D8 a7 c# w% Y  v, @Data :    U/I= 0: Voltage source. A radio button is used in newer ATPDraw versions.
              -1: Current source.
# g2 V/ u) {$ v5 ?/ _' D% v7 w          Amp= The peak value in [A] or [V] of the function.
            f= Frequence in [Hz].
( q. N0 Z3 d0 P- C7 [          pha= Phase shift in degrees or seconds depending on A1.
, [3 P, b5 y; O9 l           A1= 0: pha in degrees.
1 P: K! u1 _6 U% D  C              >0: pha in seconds.
         Tsta= Starting time in [sec.]. Source value zero for T<Tsta.
         Tsto= Ending time in [sec]. Source value zero for T>Tsto.
Node :     AC= Positive node of cosine function.
- W; `1 n. ~2 L6 y( d               Negative node is grounded.
" J8 v: H& _# E0 n7 L) fFor trapped charge functions: Specify a current source, a very low frequency, Tsta=5432. and Tsto=0.
. M! g- X2 X4 [- W1 u/ oRuleBook: VII.C.4
请问红色字体是啥意思？