4 order pll simulation using matlab

hungda50310

最近想使用matlab模擬PLL的behavior，

& ^* p" i9 ^2 n但block接好後，卻無法模擬，出現下面error

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' o: ]- W$ C* o3 ~/ ?) Y* p  L7 BAt time 1.654088834175351e-009, simulation hits (1000) consecutive zero
, O# O$ O  J2 M( z  D: a6 mcrossings. Consecutive zero crossings will slow down the simulation or cause
the simulation to hang. To continue the simulation, you may 1) Try using
Adaptive zero-crossing detection algorithm or 2) Disable the zero crossing of
the blocks shown in the following table.
# \" S4 Y  V( J' P----------------------------------------------------------

請問大家這問題該如何解?
" Y8 z; M) C6 I- O* I! c( Z5 }* U
檔案附件如下:
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http://www.badongo.com/file/27315449

謝謝大家