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PLL synthesizer using AWR microwave office question

时间:04-06 整理:3721RD 点击:
hi all
I'm going to simulate PLL synthesizer using microwave office.As you know the process should be done in VSS system simulator.In that box we can fond some toolbox related to PLL.there are some famous block of PLL there including VCO,PFDand ...
to use VCO and to hilight the phase noise of VCO we have to include some noise source there and define the phase noise according to for example the datasheet of VCO.
doing that we can mesure the phase noise of VCO using TP mesurment device.
But unfortunatly I couldnt get the proper result from VCO and noise source comparing with the data that I have Imported.I have studied the help of AWR and unerestood that maybe the problem is with FFT number of Points.but increasing the FFT #of points will increase the process time too much.
now you friends please sugest me some method to analyze the phase noise of a PLL and VCO
thanks in advance

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