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Measurements >> RF Measurements >> how to measure VCO phase noise
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Message started by mydreamhouse on Apr 15^th, 2009, 11:10am

Title: how to measure VCO phase noise
Post by mydreamhouse on Apr 15^th, 2009, 11:10am

VCO frequency is dowonconverted to a IF signal, I have measured the IF phase noise, but how to calculate VCO phase noise ?

Title: Re: how to measure VCO phase noise
Post by pancho_hideboo on Apr 16^th, 2009, 5:47am

mydreamhouse wrote on Apr 15^th, 2009, 11:10am:

VCO frequency is dowonconverted to a IF signal, I have measured the IF phase noise, but how to calculate VCO phase noise ?

If you know phase noise of LO signal to down convert VCO to IF, you can evaluate phase noise of VCO.