URGENT: Help needed in cosimulation in ADS

[42karim]

Hello every one,

I am designing a transmitter that includes both DSP part and rf/Analog part. While simulating the complete design using ptolemy simulator, i am getting this error "zero or negetive time step at inputs is not allowed for cosimulation". I am new to ADS2002C and have tried alot to remove this error.

Can someone tell me how to remove this?? I am using Envelope simulator in RF subnetworks. The STEP i am giving in ENV is lesser than what i am giving in DF controller.

I shall be very grateful to you....

Regards,

 

[vkshenoy]

i'm not sure, but i think the time steps need to be exactly same in both dsp and analog/rf

 

[kspalla]

Please share the design