Buffer input error in simulink

hi to all

i'm working with simulink, and im trying to see the signal with spectrum scope and i get an error message :

"When the input to the Spectrum Scope block is sample based, you must select the "Buffer input" check box."

my question is, where is "buffer input" ? , and if i will check it , will it work ?

thanks !

Answer 1

[Fangjun Jiang]

It is right there when you double click the "Spectrum Scope" block. The first tab, the "Scope Properties" tab.