hslsc311
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Posts: 5
beijing
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dear all i need your help,here is my question:i want to use PXF analysis of spectreRF simulator to evaluate the power noise effect on the phase noise of VCO output.but i cannot get the waveform. my PSS setting is like this: .beat freq=400M //VCO output 426M .number of harmonics =10 .accuracy default: moderate .tstab=200n .hlight oscillator and choose OSC node and reference node my PXF setting is like this: .sweeptype=relative and relative harmonic=1 .sweep range:1K to 250M .points per decade =10 .maximum sideband=1 .select positive output node and negative output node .choose modulated for specialized analysis .outputtype=SSB/AM/PM .input modulated harmonic list=1 0 .output modulated harmonic =1 after the simulation,i select the direct plot form,and click "pxf modulated",choose SSB for input,PM for output;0 0 for modulated input harmonic and 426.903M 1 for modulated output harmonic. however,after i selected the power voltage source.simulator told me : *error* mag: can't handle mag(nil) *error* evaluating expression (_drplModPxfVGain('SSB 0 'PM 1 '("/V0" "/VDDA/" "/gnd!"))) *error* ("difference" 0 t nil ("*error* difference:can't handle (nil - 0.0)"))
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