求解释

忍者22

Name : AC1PH - Steady-state (cosine) function. TYPE 14.
" Z* }5 m+ e# n$ G) y! MCard : SOURCE
& u; @- P5 ]/ HData :    U/I= 0: Voltage source. A radio button is used in newer ATPDraw versions.
6 t1 P2 e: ~2 x* |7 N' ^              -1: Current source.
5 ~9 ]+ X/ A- J* H' R1 S          Amp= The peak value in [A] or [V] of the function.
            f= Frequence in [Hz].
          pha= Phase shift in degrees or seconds depending on A1.
- M; o# J/ n9 ~$ V           A1= 0: pha in degrees.
& O( p$ Z6 O3 S' R              >0: pha in seconds.
4 P  R6 F" {1 ~+ ~, z         Tsta= Starting time in [sec.]. Source value zero for T<Tsta.
         Tsto= Ending time in [sec]. Source value zero for T>Tsto.
9 b; ]9 _, H1 E) w, q1 BNode :     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
0 D, o/ y8 M' a请问红色字体是啥意思？