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Multisim and Ultiboard

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How to do Parameter Sweep when source is AC?

Hi,

I am facing a difficulty in doing 'Parameter Sweep for Maximum Power Transfer'. In the circuit, I have two AC Sources having some internal impedance connected in parallel with a purely resistive load. I want to to obtain the value of the load resistance for which maximum power is transferred to the load.

I have tried doing DC Operating Point Analysis in Parameter Sweep, but it is not giving me correct result. I doubt that each time multisim changes parameter, it collects the transient value of power consumed by resistor, thereby giving '0W' power for the whole range of resistor values. 

So how can I get Steady State Average Power consumed by Load Resistor R3 for the whole range of resistance values in Parameter Sweep?  

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