how to plot voltage vs time delay in ltspice?

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vinay_r

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hi

i am trying to design a PFD for a PLL. i want to check if the PFD has a dead zone. so i swept the time delay (td) of one of the inputs to the PFD from 0 to T, where T is the time period of the pulse input. now i want to plot the up/down voltages vs the time delay (td). i am using LTspice. thanks in advance. here is my netlist file:

 

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