Oscilloscope doesn't show any result in A/B or B/A trace

[komalraina]

Hello! I am trying to get A/B trace of a system. But the oscilloscope doesn't show any result. It only shows time response. I am a beginner at using Multisim and i think i am definitely missing something. I have attached the sim file. Can somebody help me in this regard ?

[aa232004]

hello there /

I opened your schematic and did simulation run - it produced DC levels only  - and in that case AB mode should show  you 1 small dot on the screen. and I believe it does it all right. 

I am not clear about what your module supposes to do , it looks like sort of analog integrator or something like that. 

I 'd recommend to make your module oscillate first , then your  AB mode will be  working properly.

there are a  few extra questions -

what that thing supposes to do ?

are you copying existing design or you creating your own?

with hope it helps

thanks

Michael