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noise of VCO (Read 3077 times)

pppp New Member Offline Posts: 2	noise of VCO May 06^th, 2005, 11:20am I am running pnoise on a VCO. Could some one tell me the result is in single-side or double-side means? Thanks a lot.
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pancho_hideboo

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Re: noise of VCO
Reply #1 - May 8^th, 2005, 8:28am

It is SSB-Phase Noise.

Although you can extend a sweep frequency from negative to positive like following, the result is SSB-phase noise

pnoise �( �Vout �0 �) �pnoise �sweeptype=relative �relharmnum=1
+ � � � start=-100 �stop=100 �step=5 �maxsideband=15 �iprobe=V0
+ � � � refsideband=1 �noisetype=sources �annotate=status �save=allpub
+ � � � saveallsidebands=yes

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pppp New Member Offline Posts: 2	Re: noise of VCO Reply #2 - May 9^th, 2005, 12:09pm Thank you very very much. It seems I gained 3dB here since negtive sideband noise is already folded.
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