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Comparing phase noise at different fundamental frequencies (Read 65 times)
deba
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Comparing phase noise at different fundamental frequencies
Jul 9th, 2017, 11:49pm
 
Hi,

Lets say if there is a dBc/Hz(phase noise) profile available for an oscillator at 1 GHz. How does this translate to a phase noise profile at 100 MHz? Can one simply take the phase noise profile at 1 GHz and scale it up by 20*log10(100 MHz/1 GHz)? This will be true if 1 GHz is divided to 100 MHz. But lets say one achieves this by changing the components like tuning caps inside the oscillator to get the centre frequency from 1 GHz to 100 MHz. Will it still hold true?

How does one compare the phase noise profile of two oscillator or signal generator at different fundamental frequencies?

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« Last Edit: Jul 10th, 2017, 6:23am by deba »  
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